25 february 2021

 The last couple of weeks have not been good for observing.  When the sky was clear enough to try to observe, there was heavy haze and awful seeing -- even the moon at very low powers was not worth viewing.  I have enjoyed viewing the sun with my 80mm f/15 refractor and new Quark Ha filter, however.  There have been some amazingly large prominences showing so much detail, and today a gigantic arched prominence from two which had merged.  My Byers mount should arrive to me next week, and I'll work to set it up in the next couple of weeks to take more advantage of views.  The next several days will have poor transparency and seeing, though fingers crossed next week will have some better conditions.

Last night was the least-bad night, with moderately good seeing 6/10, but with heavy haze and a bright, nearly full moon hurting fainter stars.  I used my 7-inch mask for views of some easier Struve and other pairs, finishing with the moon.  

STF 950 AB: 178; 205x: Lovely white and 3 delta mag fainter B, approximately 4".  In NGC 2264, the Christmas Tree Cluster
06h 40m 58.66s +09° 53' 44.7" P.A. 214.00 sep 3.0 mag 4.66,7.79 Sp O7Ve+B2: dist. 281.69 pc (918.87 l.y.)

STF 949 AB: 178; 205x: Faint, well separated white stars with significant delta mag, almost 1 delta, about 5".  Not physical.
06h 41m 00.18s +05° 42' 26.7" P.A. 289.00 sep 3.6 mag 9.17,9.70 Sp B9V

STF 953 AB: 178; 205x: Easy light yellow pair, 1 delta mag, wide.  Near NGC 2264, the Christmas Tree Cluster
06h 41m 09.41s +08° 59' 05.0" P.A. 330.00 sep 7.3 mag 7.10,7.66 Sp F5 dist. 497.51 pc (1622.88 l.y.)

STF 954 AB: 178; 205x:  Nice white A, widely separated faint B, about 3 delta mag.  In NGC 2264, the Christmas Tree Cluster
06h 41m 09.60s +09° 27' 57.5" P.A. 153.00 sep 12.9 mag 7.15,10.23 Sp B2III:

STF3117 AB: 178; 205x: Very fine, split with seeing, dull white stars, significant delta mag, very close 1"  In NGC 2264, the Christmas Tree Cluster
06h 41m 22.05s +09° 43' 51.6" P.A. 77.00 sep 0.9 mag 9.17,9.76 Sp B9

STF3118 AB: 178; 205x: Faint but easy pair, wide, approximately 3" separation, almost 1 delta mag.  Not physical.  In NGC 2264, the Christmas Tree Cluster
06h 41m 30.09s +09° 49' 48.5" P.A. 174.00 sep 2.8 mag 9.78,9.87 Sp A2

STF 956 AB: 178; 205x: Faint B noticed with averted vision but can hold it with direct, a fine pair, A is in an arc of three similar magnitude stars.  Not physical.
06h 42m 40.55s +01° 42' 58.2" P.A. 194.00 sep 6.9 mag 7.96,10.69 Sp O8.5V dist. 1030.93 pc (3362.89 l.y.)

A 2823 AB: 178; 205x: White A and much fainter B, can see just see it with direct vision, wide about 5" and 3 delta mag.  It is sharper with seeing.  Not physical.
06h 43m 15.27s +06° 07' 01.0" P.A. 300.00 sep 4.5 mag 8.01,10.30 Sp B9V dist. 159.74 pc (521.07 l.y.)

A 2680 AB: 178; 205x: Nice!  Very fine, with seeing, close less than 2", around 1 delta mag, light orange A and white B.  A really fine pair. 
06h 45m 51.88s +03° 24' 01.3" P.A. 161.00 sep 1.6 mag 9.55,9.71 Sp A7 dist. 25000 pc (81550 l.y.)

A 2731 AB: 178; 205x: Excellent pair, around 2 two delta mag, more than 1" separated, very fine, dull white A and light yellow B.  Physical with a 247 year period.
06h 48m 39.38s +07° 37' 20.4" P.A. 67.60 sep 1.4 mag 8.24,9.53 Sp G5 dist. 53.13 pc (173.31 l.y.)

WFC 45 AB: 178; 205x: Faint pair, wide, 1 delta.  Does not seem like an obvious double
06h 49m 49.42s +06° 56' 04.2" P.A. 321.00 sep 7.0 mag 9.96,10.50 Sp K0III

J 56 AB: 178; 205x: Very fine near equal pair, 1.5" separation, really good
06h 52m 37.65s +03° 14' 17.8" P.A. 334.00 sep 1.5 mag 9.39,9.72 Sp A2

STF 986 AB: 178; 205x: Easy Struve, around 1 delta mag, wide, light blue-white stars.  Physical
06h 54m 54.08s +09° 29' 56.5" P.A. 163.00 sep 5.5 mag 8.26,9.02 Sp A2

BU 326 AB: 178; 333x: Seeing not great, so I only get a notched elongation at the highest mag the sky will support, only 333x.  Needs a better night.  Discovered at 1.2", so it has closed considerably, and I should not feel bad not seeing it with just 7-inch aperture.
06h 56m 11.96s +02° 18' 59.7" P.A. 341.00 sep 0.5 mag 8.00,9.50 Sp G5 dist. 709.22 pc (2313.48 l.y.)

J 278 AB: 178; 205x: Faint pair, just brightens enough to split with averted vision.
06h 58m 36.18s +06° 41' 10.9" P.A. 147.00 sep 2.4 mag 9.95,10.32 Sp B9

STF1066 AB: 178; 205x: Bright light yellow A and much fainter light orange B, wide about 6".  Physical.  
07h 20m 07.39s +21° 58' 56.4" P.A. 229.00 sep 5.5 mag 3.55,8.18 Sp A9III+K3V dist. 18.54 pc (60.48 l.y.)

STF1053 AB: 178; 205x: White A and very faint B, can barely see it direct, it brightens with averted, wide about 15".  Not physical.
07h 16m 48.52s +24° 32' 10.7" P.A. 316.00 sep 13.9 mag 7.35,10.83 Sp A0 dist. 163.67 pc (533.89 l.y.)

STF1061 AB: 178; 205x: Bright white A and very much fainter B which is a very fine wide point which sharpens with seeing
07h 18m 05.61s +16° 32' 25.7" P.A. 36.00 sep 9.3 mag 3.58,10.70 Sp A3V dist. 30.93 pc (100.89 l.y.)

STF1068 A fine faint pair, noticable mag difference, wide about five
07h 19m 49.31s +13° 22' 22.4" P.A. 350.00 sep 4.1 mag 9.29,9.80 Sp A2

STF1070 AB: 178; 205x: Seen at zenith, a fine white pair, 1 delta mag, about 3", nice
07h 21m 21.87s +34° 01' 36.2" P.A. 324.00 sep 1.7 mag 8.65,9.30 Sp A0 dist. 418.41 pc (1364.85 l.y.)

STF1081 AB: 178; 205x: Very pretty blue-white A and slightly orange B, well separated about 2" 
07h 24m 08.94s +21° 27' 28.0" P.A. 234.00 sep 1.9 mag 7.68,8.52 Sp B9 dist. 210.97 pc (688.18 l.y.)

STF1083 AB: 178; 205x: White stars, wide, 1 delta mag.  A nice, typical Struve
07h 25m 35.30s +20° 29' 42.6" P.A. 226.00 sep 6.9 mag 7.32,8.13 Sp A5 dist. 132.45 pc (432.05 l.y.)

STF1088 AB: 178; 205x: White A and two delta mag B, well separated.
07h 26m 02.42s +14° 06' 10.7" P.A. 195.00 sep 10.9 mag 7.38,9.37 Sp A0V dist. 458.72 pc (1496.34 l.y.)

STF1089 AB: 178; 205x: Near equal wide white, not physical
07h 26m 11.97s +14° 50' 25.3" P.A. 7.00 sep 7.2 mag 8.87,8.93 Sp A2 dist. 180.51 pc (588.82 l.y.)

STT 171 AB: 178; 333x:  ! Exceptionally fine, with seeing, white A and bluish B, 2 delta mag, B appears as a very fine point at A's diffraction ring, less than 1".  Suspected at 205x, best seen at 333x.
07h 26m 39.61s +31° 37' 11.9" P.A. 138.00 sep 1.0 mag 7.39,9.19 Sp G5 dist. 159.49 pc (520.26 l.y.)

STF1094 AB: 178; 205x: White, 1.5 delta mag, about 2", nice and cleanly split  
07h 27m 25.99s +15° 18' 59.0" P.A. 97.00 sep 2.5 mag 7.58,8.52 Sp A0V dist. 507.61 pc (1655.82 l.y.)

A 2868 AB: 178; 333x: ! Strongly notched to hairline at 205x, steady hairline split at 333x with seeing, very noticeable magnitude difference.
07h 29m 09.44s +12° 52' 45.5" P.A. 22.00 sep 0.7 mag 8.59,8.98 Sp G0

STF1102 AB: 178; 205x: Easy white A and ruddy B, wide, 1 delta.  Physical.
07h 30m 26.25s +13° 51' 54.0" P.A. 45.00 sep 7.7 mag 7.36,9.21 Sp F5 dist. 45.41 pc (148.13 l.y.)

STF1106 AB: 178; 205x: Easy wide white pair, noticeable magnitude difference
07h 31m 21.02s +16° 18' 38.6" P.A. 35.00 sep 10.7 mag 9.40,9.47 Sp G0

STF1108 AB: 178; 205x: Very lightly yellow A and very light blue B, wide, 2 delta, a pretty pair

07h 32m 50.63s +22° 53' 15.4" P.A. 179.00 sep 11.7 mag 6.62,8.21 Sp G8III dist. 136.61 pc (445.62 l.y.)

liftoff

 While observing the sun with my PST today, around 12:30pm, I noticed one bit of prominence which was separated from the limb.  It hovered like a small wisp of cloud, with a bright knot to one side of it.  I sketched it and wrote "liftoff?" in my notebook.  

Sure enough later on I found someone on CN had posted photos of it -- confirming what I saw.  Very neat, a first for me.

5 february 2021

Transparency and seeing were slightly better last night.  Between 8-9pm I used the Tour function on the Argo Navis to sample some doubles in Orion.  Some lovely pairs but I didn't bother to take notes on them.  After 9pm I observed a little higher up, mostly in Gemini.  I went to full aperture though with the apodising mask, and had to keep the magnifications low.  All the same, a good session.  Some dew, and it got cold, in the lower 40s.

BU 1059 BC: 508; 333x: A-BC is the very bright orange A star Mu Gem, which is itself a  with several faint widely separated stars around, the brightest of which is BC.  BC was quite faint, flashing a definite elongation but no separation with averted vision, significant delta mag.   Discovered in 1889 36-inch at 0.8", it has narrowed since.

06h 23m 02.65s +22° 29' 24.4" P.A. 265.00 sep 0.6 mag 11.50,12.40

OSB 3 AB: 508; 333x: Extremely faint B, approximately 2 delta mag.  B see with averted vision only, well separated.  It is a physical pair.  W.H. Osborn, who has eight discoveries to his name, about whom I can't find any further information (I assume he is not the railroad tycoon in the Google search results).
06h 22m 23.33s +22° 43' 07.4" P.A. 4.00 sep 7.9 mag 9.80,11.00

STT 519 AB: 508; 205x: Pretty 2 delta mag, wide, light yellow A and very light blue B.  Physical
06h 31m 17.74s +15° 44' 14.4" P.A. 78.00 sep 8.4 mag 8.36,10.90 Sp G5

J 1093 AB: 508; 333x:  Tough near equal pair, I have trouble to resolve the elongation which appears in all powers through 533x, though can tell this is double
06h 34m 43.85s +26° 05' 20.7" P.A. 4.00 sep 1.3 mag 9.77,10.50

VDK 1 AB: 508; 205x: Attractive pair, approximately 2 delta and 3", slightly light orange A, well split.  Sadly not physical.  One of three discoveries by J. Vanderdonck
06h 36m 29.25s +26° 43' 39.5" P.A. 43.00 sep 3.0 mag 10.30,11.40

STF 943 AB: 508; 205x: Not sure why this one was picked out as a double, it's such a rich field any could be any such pair.  Wide near equal white. 
06h 37m 47.00s +23° 10' 36.0" P.A. 135.00 sep 31.1 mag 9.17,9.42 Sp G0

A 511 AB: 508; 205x: Wonderfully close pair, looks like the small snowman's head popped off the body, close split, 1 delta mag, white stars 

06h 44m 20.42s +28° 22' 08.1" P.A. 157.00 sep 1.6 mag 9.63,10.43 Sp F8 dist. 167.79 pc (547.33 l.y.)

A 122 AB: 508; 533x: Nice light orange stars, hairline split with indifferent seeing, PA to the SW.  Slight magnitude difference.  Physical with 102.3-year period, I have the PA reversed in my estimate, it's to the NE -- still can claim it though.  It is coming off apastron and will close slightly in the next 20 years.  Aiken discovered in 1900 with the Lick 36-inch also at 0.4" -- 118 years since, so it has made a little more than one revolution.

06h 45m 27.02s +29° 21' 59.8" P.A. 22.00 sep 0.4 mag 8.89,9.39 Sp F8V dist. 77.04 pc (251.3 l.y.)

WFC 42 AB: 508; 205x: White stars, wide split, very slight delta mag, quite pretty.  Physical pair.
06h 45m 27.48s +33° 12' 55.4" P.A. 358.00 sep 4.5 mag 10.11,10.80

STF 981 AB: 508; 333x: Very finely split, white stars, nearly 1 delta mag.  Appeared as a rod at 205x.  Physical with a 1089.7-year period.  Discovered in 1831 at 3.7", near apastron, it has narrowed considerably since.
06h 55m 28.54s +30° 09' 42.3" P.A. 115.80 sep 0.9 mag 8.72,8.97 Sp G0 dist. 38.49 pc (125.55 l.y.)

STF 983 AB: 508; 205x: B is very faint for a Struve pair, it's wide, with a light orange A star, approximately 3 delta mag.  Not physical.

06h 56m 13.67s +34° 27' 32.7" P.A. 36.00 sep 10.7 mag 8.70,12.70 Sp B9

STF 984 AB: 508; 205x: This is a typical Struve, light yellow A, slightly orange B, approximately one delta mag and 4".  Not physical 

06h 56m 16.59s +32° 26' 41.4" P.A. 155.00 sep 3.3 mag 8.67,10.80 Sp G5

4 february 2021

 Last night was a bit of a bust.  Seeing was awful even when masked down to 7-inches, and transparency was so poor I had trouble seeing even 9th magnitude stars.  I did however figure out the vignetting I noticed before was coming from a focuser baffle being out of place, so I fixed that.

I observed for about 40 minutes before quitting.  There was one interesting pair seen: 

STF 541 AB, CD: 178; 203x: AB is a bright white pair, super wide, approximately 1 delta mag.  Nearly in between is a near equal faint pair of 10th magnitude stars, approximately 6" separated, with a PA slightly off-kilter to the AB pair.  The A star is an Aa-Ab pair, OCC 327, equal magnitudes but no separation given, from the Occulting Doubles Catalog -- I wonder if it would show out of round visually with aperture & high magnification.

Image from a poster on Cloudy Nights:

20 january 2021

 Last night was both rewarding and frustrating.  I started observing at around 7:30, and the seeing was quite good.  The moon was in quarter phase so I spent a good hour on it with binoviewers at around 300x at full aperture and a light red filter.  Quite amazing detail all around.  My first sighting of Linne, and fine views of Hyginus Rille, Trisnecker Rille, and more.  

I decided to switch over to double stars, and went straight for short period pairs: 

BU 1052 AB: 508; 533x: Suspected at 333x, split at 533x, light orange stars, ~1.5 delta, it was actually an easy split and I could easily place the PA to the south, which is just where it is. 105.692-year period, it is near apastron and won't make significant change in my lifetime.  Discovered with the 36-inch at 0.7" in 1889, it has made just over one revolution since.
05h 41m 40.34s -02° 53' 47.3" P.A. 183.10 sep 0.7 mag 6.68,8.22 Sp A9IV-V dist. 80.71 pc (263.28 l.y.)

STT 65 AB: 203; 533x: For this one I chose to use the 8-inch mask, since the star brightness washed out the image in full aperture.  This appeared as a very tight pair, hairline split, and ~1 delta mag.  I estimated the PA to the south.  Approaching apastron, and won't make significant change in my lifetime in spite of the 61.2-year period.

03h 50m 18.91s +25° 34' 46.7" P.A. 202.60 sep 0.6 mag 5.73,6.52 Sp A2V+A5V dist. 56.47 pc (184.21 l.y.)

BU 524 AB: 508; 1067x: This one I suspected elongation at 667x and it was better seen at 1067x.  I estimated the PA on an E-W line, though it was tough to tell which was B.  This is a component of STF 318.  It is currently at apastron and again, won't make a significant change in the coming years.  31.63 year period.  Discovered with the 18.5-inch, Burnham says: "It is at all times a difficult pair, and the motion is rapid.  It is now known to be one of the most interesting binaries in the heavens.  The distance never much exceeds 0.2", so that it is always a difficult pair, and beyond the reach of most telescopes."

02h 53m 42.58s +38° 20' 15.6" P.A. 266.10 sep 0.2 mag 5.79,6.80 Sp F4IV dist. 70.67 pc (230.53 l.y.)

I attempted COU 2031, but I find my PA estimation was off though I thought I saw a peanut shape.

04h 46m 26.92s +42° 20' 54.2" P.A. 150.00 sep 0.2 mag 6.90,7.80 Sp G0 dist. 67.07 pc (218.78 l.y.)

Seeing began to degrade at around 10pm, and I was also having pointing accuracy problems -- which is why I have no more pairs to report.  I had a quick look at M42 and the "37" cluster, but wrapped up early.

16 january 2021

Started out at 20-inches but masked down to 7-inches pretty quickly since seeing did not hold.  I think my 8-inch mask might vignette a bit with the secondary and the edge of the primary, so I made a 7-inch mask.  Besides the 7-inch works out to a f/15 focal ratio -- a good common number. 

A 2345 AB: 508; 333x: The faint companion is just split with seeing, ~1 delta mag, very tight <1".  Physical with a 959-year period.  The PA is currently precisely to the south.
03h 27m 32.03s +19° 11' 13.4" P.A. 178.90 sep 1.0 mag 9.66,10.58 Sp G0 dist. 183.49 pc (598.54 l.y.)

STT 57 CD; 508; 205x: Part of a wide bright pair (AB), this is a large delta mag, pretty wide, attractive pair
03h 33m 26.53s +23° 23' 03.5" P.A. 321.00 sep 10.0 mag 7.67,12.00 Sp G5

STF 414 AB: 508; 205x: Near equal white pair, well split.  Physical.
03h 34m 27.73s +19° 47' 52.4" P.A. 187.00 sep 7.5 mag 8.15,8.28 Sp A0

STF 420 AB: 508; 205x: Almost 3 delta mag, well split, light yellow stars.
03h 36m 29.66s +23° 54' 45.5" P.A. 113.00 sep 6.7 mag 8.72,11.00 Sp G0

PAT 1 AB: 508; 205x: Listed as kyTools as a 9th magnitude pair but no magnitude given for B.  I only see it as single.  No wonder, as WDS's note is B is visible in infrared K-band.  Patience, J., Ghez, A.M., Reid, I., published in the late 1990s.

03h 37m 34.98s +21° 20' 35.4" P.A. 233.00 sep 0.5 mag 7.80,10.40 Sp G5 dist. 39.71 pc (129.53 l.y.)

STF 450 AB: 178; 205x: Pretty blue-white A and lightly red B pair, wide, large delta mag ~3.
03h 47m 24.41s +23° 54' 52.8" P.A. 263.00 sep 5.7 mag 7.29,9.40 Sp A2V

LOH 1 AB: 178; 205x: Faint pair, slight delta between them, well separated.   One of the base stars forming a pointed triangle.  This is Wilhelm Oswald Lohse's one and only double star discovery, Publications of the Observatory of Potsdam 20, #58, 1908.  He has craters on both the moon and Mars named for him.  
03h 48m 08.14s +22° 33' 32.3" P.A. 132.00 sep 9.3 mag 10.00,11.50

STF 453 Aa-Ab: 178; 533x: I see an out of roundness in the A star, bright white.  There are many more pairings, many HLs (Asaph Hall).   

03h 49m 09.73s +24° 03' 12.7" P.A. 40.00 sep 0.5 mag 3.80,6.80 Sp B8III dist. 117.23 pc (382.4 l.y.)

 

STT 64 AB: 178; 205x: Significantly fainter ~4 delta mag B, wide, it's a tiny white dot to bright white A.  
03h 49m 58.06s +23° 50' 55.3" P.A. 235.00 sep 3.3 mag 6.81,10.15 Sp B9.5Vp dist. 146.84 pc (478.99 l.y.)

STF 457 AB: 178; 205x: Very finely split at 205x, better split--but more dependent on seeing--with 333x. Equal pair, faint.
03h 50m 19.66s +22° 40' 41.6" P.A. 91.00 sep 0.7 mag 9.31,9.44 Sp F5

STT 65 AB: 178; 333x: Notched snowman, B is a little bluish to white A, can tell orientation, short period with PA to the SW (correct!).  61.2-year period, it will soon be at apastron.  Given it's nearly edge-on orbit, I won't see significant change, except for a slightly better split, in my time.
03h 50m 18.91s +25° 34' 46.7" P.A. 202.60 sep 0.6 mag 5.73,6.52 Sp A2V+A5V dist. 56.47 pc (184.21 l.y.)

HEI 9 AB: 178; 205x: B flashes with averted vision, pretty close to white A, ~3"
03h 51m 21.55s +25° 38' 07.4" P.A. 282.00 sep 4.3 mag 9.30,10.40 Sp G5

BU 85 AB: 178; 205x: Very faint B can be seen direct, ~4".  Discovered with 6-inch.  Not physical.
03h 55m 26.06s +17° 37' 57.6" P.A. 217.00 sep 4.0 mag 7.95,9.95 Sp G5 dist. 197.63 pc (644.67 l.y.)

MLB 639 AB: 178; 205x: B barely seen direct, flashes with averted vision.  Very light orange A.  Not physical.

04h 00m 05.00s +27° 33' 18.3" P.A. 267.00 sep 8.1 mag 8.14,9.70 Sp K5

STF 479 AB: 178; 205x: White stars, ~1 delta, wide.
04h 00m 56.81s +23° 12' 05.4" P.A. 126.00 sep 7.5 mag 6.92,7.76 Sp B9V dist. 328.95 pc (1073.03 l.y.)

STF 481 AB: 178; 205x: B is faint but easily seen and steady, white A, ~3 delta mag, wide
04h 02m 14.87s +28° 07' 35.0" P.A. 106.00 sep 2.7 mag 7.52,9.60 Sp G8II

STF 495 AB: 178; 205x: White A, ~3 delta mag B, ~3".   OCC9088 Aa-Ab is 6.20/7.80 1.6", not seen.  
04h 07m 41.98s +15° 09' 46.1" P.A. 224.00 sep 3.8 mag 6.11,8.77 Sp F3V dist. 43.63 pc (142.32 l.y.)

STT 72 AB: 178; 205x: Very light orange A, and very faint B, need foveal coaxing to hold it direct, ~4"
04h 07m 59.42s +17° 20' 23.6" P.A. 328.00 sep 4.7 mag 6.10,9.71 Sp K5IIIb dist. 123.15 pc (401.72 l.y.)

BU 309 AB: 178; 205x: White star A and very much fainter B, seen direct barely, ~4"
04h 08m 20.64s +19° 44' 15.5" P.A. 280.00 sep 5.7 mag 7.77,11.03 Sp A2 dist. 326.8 pc (1066.02 l.y.)

STF 494 AB: 178; 205x: Near equal white stars, well separated
04h 08m 53.50s +23° 05' 55.1" P.A. 188.00 sep 5.2 mag 7.53,7.65 Sp A8IV+A8IV dist. 104.71 pc (341.56 l.y.)

14 january 2021

Another night when the forecast was grim for transparency but was still rewarding.  Heavy dew and getting cold by 10pm, but seeing was slightly better than the night before, and I went after a few challenges and short period pairs.  I started at around 7pm, had a break from 9-10pm, then closed at 11pm.

BU 1105 AB: 508; 667x: I see the slightest bump on side of A, very much fainter.  I disabled tracking to record my impression of the position angle, which I had to the ESE, and find this is correct.  With seeing, and using the apodising mask and seeing.  WDS is uncertain whether it is binary, but there are only 6 observations.  In the Pleiades, Burnham discovered with the 36-inch at 0.3" and described it as a "difficult pair." 
03h 48m 34.80s +24° 10' 52.2" P.A. 114.00 sep 0.2 mag 9.30,10.40 Sp F4V



BU 1179 AB: 508; 333x: 34 Per.  B is the faintest, smallest dot separated from bright white A, extremely fine. Burnham discovered with the 36-inch at 0.7" and described it as a "difficult pair." 

03h 29m 22.05s +49° 30' 32.2" P.A. 141.00 sep 0.6 mag 4.72,7.34 Sp B3V dist. 165.29 pc (539.18 l.y.) 

BU 1294 AB: 508; 205x: A is red-orange, B widely separated & light blue color, ~1 delta mag, 9th and 10th magnitudes. Not physical.  Burnham discovered with the 40-inch, and said "The components are red and green."
03h 20m 40.58s +46° 40' 47.5" P.A. 240.00 sep 8.7 mag 9.66,10.28 Sp A2

BU 87 AB: 203; 205x: Very fine bright light orange A star and a much fainter B star just separated.  Best seen with the 8-inch mask which shows nice Airy disks, orange A and light blue B.  Binarity uncertain with 38 measures.  Burnham discovered with 6-inch and noted: "A fine colored pair, golden:blue"
04h 22m 22.74s +20° 49' 16.4" P.A. 167.00 sep 1.9 mag 6.21,8.60 Sp B3V+K3II dist. 714.29 pc (2330.01 l.y.)

HU 1080 AB: 508; 533x: Used 533x & 667x.  I could detect elongation at 533x, and significant notching with 667x, enough to tell which was A & B and the position angle, which I put at nearly E-W (B is tightly WSW currently).  Physical with a 40.752-year period, it is widening and reaches apastron in 2029, so maybe I'll get a clean split and a more accurate PA estimate at that time.

04h 28m 59.78s +16° 09' 32.7" P.A. 262.30 sep 0.3 mag 6.85,8.38 Sp F7V dist. 48.43 pc (157.98 l.y.)

STF 383 AB: 203; 205x: Wide, >1 delta mag, light orange A and almost blue B 
03h 24m 14.32s +17° 32' 58.5" P.A. 121.00 sep 5.5 mag 8.48,9.12 Sp G5 dist. 105.37 pc (343.72 l.y.)

STF 403 AB: 203; 205x: Only a slight but noticeable magnitude difference, fairly tight separation ~3", white stars.
03h 31m 13.43s +19° 47' 00.3" P.A. 173.00 sep 2.3 mag 8.71,8.92 Sp F8 dist. 107.53 pc (350.76 l.y.)

STF 401 AB: 203; 205x: Slight magnitude difference, brilliant white stars, with another slightly fainter and much wider pair in the field (this is SHY 445 BC).  Physical.
03h 31m 20.76s +27° 34' 18.5" P.A. 270.00 sep 11.5 mag 6.58,6.93 Sp A2V dist. 97.47 pc (317.95 l.y.)

HO 14 AB: 203; 205x: Very fine pair, half delta mag, ~2", faint but still direct vision 
03h 33m 14.30s +28° 16' 30.9" P.A. 26.00 sep 2.2 mag 9.70,10.04 Sp A

STF 412 AB: 508; 333x: Exciting 2+1 set.  AB is brilliant near equal white, nice close split <1".  C is a much fainter wider star.  I also cleanly split AB with the 8-inch mask, but the dark gap was narrower.  Physical with a 522.16-year period. 

03h 34m 26.62s +24° 27' 52.1" P.A. 350.10 sep 0.8 mag 6.60,6.86 Sp A3V+A3V dist. 131.58 pc (429.21 l.y.)

STF 415 AB: 203; 333x: Very wide B, faint pair, almost 2 delta mag.
03h 35m 20.40s +26° 51' 00.7" P.A. 53.00 sep 15.1 mag 8.75,10.88 Sp F5 dist. 171.23 pc (558.55 l.y.)

A 2420 AB: 203; 333x: Very fine because of its faintness.  ~1 delta mag, ~2".  I'm surprised I could get it, the clean disks and contrast of the mask helps. 

03h 38m 25.78s +17° 35' 57.2" P.A. 268.00 sep 2.0 mag 9.32,10.19 Sp A5 dist. 51.36 pc (167.54 l.y.)

STF 424 AB: 203; 333x: Transparency hurting the view, but I can still see the faint pair, wide, ~1 delta mag.  Physical.
03h 39m 10.83s +27° 57' 23.3" P.A. 313.00 sep 10.1 mag 8.87,11.46 Sp A0 dist. 212.77 pc (694.06 l.y.)

STF 427 AB: 203; 333x: Nice airy disks, slightly blue-white, wide, ~1 delta mag.  Physical.
03h 40m 38.77s +28° 46' 24.0" P.A. 207.00 sep 7.0 mag 7.41,7.84 Sp A1V+A2V dist. 113.12 pc (369 l.y.)

A 987 AB: 203; 333x: Exceptionally fine pair, faint, significant delta mag, ~1" 
03h 42m 27.88s +29° 45' 50.4" P.A. 190.00 sep 1.1 mag 10.21,10.39 Sp F8

STF 435 AB: 203; 333x: Very wide, >1 delta mag.  Physical
03h 43m 06.52s +25° 40' 52.9" P.A. 3.00 sep 13.2 mag 7.20,8.87 Sp F3V

A 989 AB: 203; 333x: Faint but easy pair, near equal, ~3" 
03h 43m 27.49s +29° 35' 35.4" P.A. 357.00 sep 3.2 mag 9.85,10.39

STF 444 AB: 203; 333x: Very pretty unequal pair, A is blue-white and B a little red, wide.  Physical
03h 45m 48.82s +23° 08' 49.7" P.A. 338.00 sep 3.4 mag 6.91,10.09 Sp A0V dist. 121.36 pc (395.88 l.y.)

BU 536 AB: 203; 333x: Wow what a great pair.  B is a clean split ~1" right next to A, ~1 delta.  More amazing to see than I can describe.  Aitken had a measure of 0.15" in 1899.70.  Burnham discovered with the 18.5-inch at 0.4" and notes "It is important that the close pair should be watched and measured in the near future."  Physical, 885.64 year period, now widening.   

03h 46m 16.00s +24° 11' 23.5" P.A. 178.80 sep 1.0 mag 8.13,9.39 Sp A7V

BU 1052 AB: 508; 533x: Suspected at 333x, easily split with 533x & apodising mask, light orange stars ~1.5 delta.   Short period with 105.692-year period.  Burnham discovered with the 36-inch at 0.7".  Currently at apastron, close to the discovery separation, it will be difficult to notice change in the next 20 years, but after 2050 it will close rapidly.

05h 41m 40.34s -02° 53' 47.3" P.A. 183.10 sep 0.7 mag 6.68,8.22 Sp A9IV-V dist. 80.71 pc (263.28 l.y.)

FOX 142 AB: 508; 205x: Attractive white star and ~3 delta mag light red B, ~6".
05h 42m 10.57s +13° 35' 30.7" P.A. 100.00 sep 5.9 mag 8.81,11.53 Sp A0 dist. 427.35 pc (1394.02 l.y.)

BU 1402 AB: 508; 205x: B just appears direct vision & brightens with averted, white A, nice small pair.  Not physical.  Discovered with the 40-inch at 9.5".
05h 47m 58.29s +12° 03' 55.9" P.A. 341.00 sep 10.8 mag 8.40,12.40 Sp F0

STF 797 AB: 508; 205x: Typical Struve, wide, two delta... nice pair
05h 48m 28.21s +04° 42' 14.0" P.A. 17.00 sep 7.3 mag 7.37,9.76 Sp A0 dist. 321.54 pc (1048.86 l.y.)

HU 40 AB: 508; 333x: Light orange A and two delta B, ~4" separation. 
05h 51m 08.25s +20° 08' 21.5" P.A. 18.00 sep 3.8 mag 9.10,10.10 Sp K0

HU 448 AB: 508; 333x: Blue-white, nearly 1 delta, pretty well split
05h 51m 53.76s +20° 37' 07.7" P.A. 238.00 sep 2.5 mag 9.25,11.13

STF 813 AB: 508; 333x: Blue-white pair, near equal, ~4" 
05h 54m 22.37s +18° 54' 01.6" P.A. 150.00 sep 3.1 mag 8.82,8.97 Sp A0 dist. 149.25 pc (486.85 l.y.)

BU 563 AB; 508; 333x: B is wide ~7", just visible with direct vision, brightens with averted.
05h 54m 37.44s +15° 30' 27.8" P.A. 186.00 sep 6.7 mag 8.01,11.10 Sp B9 dist. 281.69 pc (918.87 l.y.)

HO 20 AB: 508; 333x: B seen with direct vision, very faint, very large delta mag, both yellowish stars
05h 54m 55.20s +14° 13' 11.6" P.A. 279.00 sep 8.1 mag 6.75,11.80 Sp K0 dist. 218.82 pc (713.79 l.y.)

TDS3427 AB: 508; 333x:  Wow! very fine, near equal faint pair, nicely split.  I'm really surprised it wasn't discovered before since any one of the greats could have seen it -- I wonder if it is a physical binary and was at periastron 75-150 years ago, and only now coming to view?  Three observations so far...
05h 55m 34.58s +18° 44' 56.8" P.A. 43.00 sep 1.3 mag 10.96,11.31

A 2439 AB: 508; 333x: ~1 delta mag, ~3", not difficult 
05h 56m 49.63s +18° 22' 12.2" P.A. 146.00 sep 2.3 mag 9.28,10.60 Sp A0

HU 449 AB: 508; 333x: B revealed with averted vision, and I can hold it direct with foveal coaxing.
05h 56m 53.56s +21° 20' 35.1" P.A. 342.00 sep 3.1 mag 9.50,12.70 Sp F5

COU 376 AB: 508; 333x: Very faint, slightly unequal, most of the time an elongated smudge but  resolve with seeing. 
05h 58m 12.15s +20° 55' 22.3" P.A. 297.00 sep 0.8 mag 10.62,10.96 Sp A0

BU 894 AB: 508; 333x: Bright white A, B just appears with direct vision, brightens with averted, wide.  Discovered with the 18.5-inch at 5.1", no change. 
06h 16m 31.78s +19° 00' 47.5" P.A. 134.00 sep 5.1 mag 7.29,11.60 Sp F6V

HO 23 BC: 508; 333x: Excellent!  BC is very delicate, very close to bright C, very faint and just appears with direct vision.  Part of the widely separated S 509 AB.

06h 14m 14.70s +14° 26' 55.0" P.A. 245.00 sep 3.1 mag 8.04,11.52 Sp A5V dist. 152.67 pc (498.01 l.y.)

KUI 24 AB: 508; 667x: Bright white, olive shape is the best I can see.  Physical with 260-year period, it will tighten to invisibility the next 15 years. 
06h 14m 28.59s +17° 54' 22.8" P.A. 145.00 sep 0.2 mag 6.29,7.16 Sp A6m dist. 162.07 pc (528.67 l.y.)