29 august 2023 Cepheus Struves

Another clear, if hazy, night, with average to good seeing.  I used the 6-inch on Cepheus Struves, and had a surprisingly good night.  I didn't cover the entire constellation, but did get a good chunk of it.  Viewed the moon and Saturn at the end of the night, but transparency was hurt by Oregon wildfire smoke which has blown down our way.

STF2712 = H 4 78 7.9/12 28.5": 152; 125x: Light yellow A and wide B, seen averted vision only.  -94% PRO, it is not binary.

20h 36m 36.96s +62° 25' 55.0" P.A. 128.00 sep 28.5 mag 7.90,12.00 Sp F0 dist. 246.31 pc (803.46 l.y.)

STF2740 AB: 152; 175x: 2 Dm, white A and dull white B, nice close split with 125x, better seen 175x.  8% PRO, 472 AU WS, 1.6+1.0 Msol, and the RVD 1.6 < EV 3.1, there is some possibility it is binary and needs an orbit. 

20h 56m 50.67s +61° 33' 38.9" P.A. 331.00 sep 4.1 mag 8.29,10.08 Sp F5 dist. 102.15 pc (333.21 l.y.)

STF2751 AB: 152; 250x: Beautiful near equal pair, close split with high power.  It appears as a strongly notched elongation with the 60mm 90x.  -1% PRO, 550 AU WS, 4.1+3.6 Msol, there is a chance it's binary and needs an orbit.

21h 02m 09.00s +56° 40' 11.1" P.A. 356.00 sep 1.6 mag 6.23,6.89 Sp B8III dist. 282.49 pc (921.48 l.y.)

STF2764 A-BC: 152; 125x: Near equal, well split.  Did not notice HU 765 BC, near equal at 0.8".  A-BC is not binary, -51% PRO, and neither is BC, -68% PRO.

21h 05m 32.42s +62° 09' 31.9" P.A. 298.00 sep 6.9 mag 8.32,9.31 Sp A0V dist. 235.29 pc (767.52 l.y.)

STF2766 AB: 152; 125x: Easy near equal, light-yellow stars at low power.  68% PRO, 481 AU WS, 1.3+1.3 Msol, and the RVD 0.3 < EV 3.1, it is likely binary and needs an orbit.

21h 07m 00.38s +58° 59' 44.6" P.A. 247.00 sep 4.5 mag 8.79,9.11 Sp F5+F5

STF2771 AB: 152; 125x: Near equal, close split with low power 125x, better seen 200x.  12% PRO, 324 AU WS, 1.2+1.2 Msol, it is possibly binary and needs an orbit.

21h 04m 28.70s +70° 45' 49.9" P.A. 33.00 sep 2.7 mag 9.53,9.61 Sp K2

STF2780 AB: 152; 250x: Beautiful light-yellow stars, 1 Dm, hairline at 250x but just a snowman at lower powers.  No Gaia parallax data but an orbit should be tried all the same.

21h 11m 48.24s +59° 59' 11.8" P.A. 211.00 sep 1.0 mag 6.09,6.77 Sp B0II dist. 1315.79 pc (4292.11 l.y.)

STF2783 AB: 152; 250x: Very strongly notched elongation only even with highest powers and best seeing.  No Gaia data for the pair.  SOC grade 4 orbit, 1760-year period.

21h 14m 04.90s +58° 17' 49.8" P.A. 348.00 sep 0.7 mag 7.71,8.07 Sp A3V dist. 127.88 pc (417.14 l.y.)

STF2784 AB: 152; 125x: Wide, 2 Dm, B is faint and barely seen with direct vision.  -50% PRO, it is not binary.

21h 11m 09.19s +74° 03' 30.6" P.A. 345.00 sep 14.3 mag 9.09,10.84 Sp A1V dist. 170.65 pc (556.66 l.y.)

STF2788 AB: 152; 125x: 1 Dm, wide.  -24% PRO, it is not binary.

21h 15m 48.83s +67° 21' 14.1" P.A. 352.00 sep 8.1 mag 8.73,10.40 Sp K2III dist. 299.4 pc (976.64 l.y.)

STF2790 AB: 152; 150x: Bright light orange A, B is very much fainter, closely split at 125x, better seen 150x, with several other stars about.  -19% PRO, it is not binary.

21h 19m 15.69s +58° 37' 24.6" P.A. 45.00 sep 4.6 mag 5.85,9.27 Sp M1I+B2+B3 dist. 591.72 pc (1930.19 l.y.)

STF2794 AB: 152; 125x: Faint, very wide, 2 Dm.  -95% PRO, it is not binary.

20h 50m 42.69s +85° 52' 04.6" P.A. 90.00 sep 17.7 mag 8.54,10.88 Sp F0 dist. 240.96 pc (786.01 l.y.)

STF2795 AB: 152; 175x: Exquisitely fine near equal pair, split at 125x but better seen 175x.  95% PRO, 573 AU WS, 2.1+1.9 Msol, it is very likely binary and needs an orbit.

21h 21m 20.04s +60° 41' 57.8" P.A. 302.00 sep 1.8 mag 9.31,9.66 Sp A dist. 338.98 pc (1105.75 l.y.)

STF2796 AB: 152; 125x: White stars, wide, 1 Dm, also seen with 60mm at 40x.  -37% PRO, it is not binary.

21h 15m 35.69s +78° 35' 53.6" P.A. 42.00 sep 26.7 mag 7.43,9.56 Sp A3V dist. 278.55 pc (908.63 l.y.)

STF2798 AB: 152; 125x: 1 Dm, well separated.  Lacks Gaia data for the secondary.

21h 23m 35.73s +64° 55' 38.1" P.A. 143.00 sep 6.4 mag 8.36,9.93 Sp A1V dist. 280.9 pc (916.3 l.y.)

STF2801 AB: 152; 175x: Light orange stars, significantly unequal, split at 125x better seen 175x, close split.  38% PRO, 190 AU WS, 1.3+1.6 Msol, it is possibly binary and needs an orbit tried.

21h 18m 31.05s +80° 21' 12.5" P.A. 271.00 sep 2.1 mag 7.87,8.62 Sp F6V dist. 82.24 pc (268.27 l.y.)

STF2806 AB: 152; 125x: Bright yellow-white A and very much fainter B well split.  Best seen with the 60mm telescope, 40x, no flaring from the A star in the smaller aperture.  No Gaia parallax data for the primary.  

21h 28m 39.58s +70° 33' 38.5" P.A. 250.00 sep 13.6 mag 3.17,8.63 Sp B1IV dist. 210.08 pc (685.28 l.y.)

STF2807 AB: 152; 200x: Excellent near equal pair, faint, split with lower powers but better seen with 200x.  37% PRO, 151 AU WS, 1.2+1.2 Msol, it is likely binary.  SOC grade 5 orbit, 2818-year period.

21h 17m 33.47s +82° 31' 03.7" P.A. 310.00 sep 1.8 mag 8.65,8.77 Sp F8 dist. 75.02 pc (244.72 l.y.)

STF2810 AB: 152; 125x: Equal, wide, not much to look at, but there is 64% PRO, 1,787 AU WS, 1.5+1.3 Msol, and RVD 0.7 < EV 1.6, it is likely binary and needs an orbit.

21h 34m 34.88s +59° 06' 23.8" P.A. 290.00 sep 16.8 mag 8.43,9.04 Sp F8 dist. 75.64 pc (246.74 l.y.)

STF2812 AB: 152; 125x: Very fine split with low power, white unequal stars. 2% PRO, 507 AU WS, 1.8+1.6 Msol, it is possibly binary and needs an orbit.

21h 34m 49.90s +59° 40' 51.0" P.A. 133.00 sep 2.4 mag 9.25,9.70 Sp G0

STF2813 AB: 152; 125x: Near equal, well split.  45% PRO, 2,342 AU WS, 1.8+1.6 Msol, and RVD 0.4 < EV 1.6, it is likely binary and needs an orbit.

21h 36m 02.74s +57° 28' 14.0" P.A. 272.00 sep 10.2 mag 9.21,9.72 Sp F5

D25 AB: 152; 200x: Tough hairline split with seeing, very significant delta magnitude, high powers only.  AB-C = STF2815 is easy, wide, nearly 2 Dm.  AB is not binary, -45% PRO.  AB-C has 52% PRO, 6,743 AU WS, 4.0+2.7 Msol, and might turn out to be binary.

21h 37m 40.93s +57° 33' 37.5" P.A. 81.00 sep 7.5 mag 8.65,10.52 Sp A0 dist. 446.43 pc (1456.25 l.y.)

STF2816 AC: 152; 125x: Easy 2 Dm well split with low power. Very large Gaia parallax error of 16%, cannot be certain.

21h 38m 57.61s +57° 29' 20.5" P.A. 120.00 sep 11.8 mag 5.73,7.48 Sp O6V+B1.5V dist. 606.06 pc (1976.97 l.y.)

STF2837 AB: 152; 125x: Close split, white stars, unequal, pretty.  Lacks Gaia data for the secondary.

21h 36m 58.67s +82° 55' 16.5" P.A. 269.00 sep 3.2 mag 8.84,9.36 Sp G5

STF2843 AB: 152; 200x: Slightly unequal light-yellow and dull blue stars, very close split with 125x but better seen medium and high powers.  70% PRO, 122 AU WS, 1.8+1.7 Msol, it is likely binary and needs an orbit.

21h 51m 37.25s +65° 45' 09.9" P.A. 150.00 sep 1.4 mag 7.01,7.28 Sp A1m dist. 87.57 pc (285.65 l.y.)

more obscure nebula

Reviewing the Finkbeiner layer in Aladin, I noticed two relatively small clouds located off the plane of the Milky Way. One is in Hercules near planetary nebula NGC 6120, and the other is near Alpha Aquarius. I've yet to figure out if there is a designation for these but decided to try for them the next opportunity I had.

I observed Friday night 9/8 on top of a ridge in the California Central Coastal Range. Transparency was off and a weather system churned over the Pacific; indeed, there were lightning flashes beyond the coastal hills, and some cloud bands streamed slowly from the southeast to the northwest. SQML was 21.09, and I tried to make the most of the night before the clouds came in.

I used both a NP-101 and a 60mm f/6 refractor for the observations. It turns out both of these were best seen with just the 60mm & Ha filter (3nm in this case). I printed star field finder charts and images from Aladin, adjusting the pixel scale to exaggerate the nebula brightness.

The Hercules nebula was very faint, but immediately seen when flipping from unfiltered to Ha filter in my filter wheel. It lay west of a distinctive "U" shaped asterism of 5 stars. The brightest section overlay an elongated triangle of near equal stars, and fainter grey-scale changes to the background sky extended down to a large trapezium asterism. It is around 1.8-degrees E-W and 1.4-degrees N-S.

The Alpha Aquarius nebula was considerably fainter, larger, and more tenuous. I called it very extremely faint, and I couldn't see it without flipping between filtered and unfiltered several times and panning the scope around to make sure it moved with the sky and not the scope. It is very diffuse, no visible edge, and feels mottled. It is around 4-degrees NW-SE by 2.5-degrees NE-SW. I only saw the main body of the nebula; the Finkbeiner image shows a parenthesis of nebula around this, but I did not see these.

I continued through the night observing various LBN objects in Aquila, with the NP-101, many of which rivaled these two nebula for faintness. Having mostly finished observing the Sharpless Catalog, I plan to make the LBN my next project.

Strottner-Drechsler-Sainty 1: 60mm, Ha+OIII dual band, OIII cloud near M31: This was surprisingly easy with the wide field!  Very faint, but obvious, elongated cloud around 2-degrees SE of the galaxy, running parallel to it and bordered on one side by a lazy "L" asterism, the brightest star of which is Upsilon Andromedae.  Discovery image attached, it is the blue-green elongated cloud. 

LBN 92: LBN 030.54+00.41 = Sh2-66: With the 4-inch and Ha, It was faint, irregularly round, diffuse edge, with several bright stars intermingled with one near the center.

LBN-94: LBN 030.66-00.65 = Sh2-67: In the same FOV, it is slightly larger and more oval shape, more diffuse, also with a centrally located star.

LBN 99: LBN 032.38+01.93 -- HII Region = Sh2-69: Faint, small in this field, with a small concentrated mass with a wing or comma shape coming off the northern end and swinging east.  

LBN 100: LBN 032.44-15.40 -- HII Region: 40'x12': Large, 3:1 oval shape, with many stars intermingled, moderately brighter in the middle.  This seems to be one part of a larger structure, which I did not see as I did not pan around.  

LBN 101: LBN 033.83-14.72 -- HII Region. 180'x90': Large, very faint mottled greyscale change filling the field, seems centered on a large loose cluster of faint stars.

LBN 103 = SH 2-71 -- Planetary Nebula: Small, round, hazy ball with soft edges, brightens with averted vision.  Not enough image scale to see the detail shown in photographs.  

LBN 104 LBN 036.57-01.81 -- HII Region = Sh2-72: In the same field, appears as a curved glow, diffuse and large.  The image here from stellarscenes.net shows LBN 103 as the bright red glow near center, and LBN 104 as the red diffuse glow just left of center.  

LBN 108: LBN 039.55-16.65 -- HII Region. 150'x50': Very large, fills the 4-degree field, very faint and vague but with noticeable, if diffuse, edges.  

LBN 110: LBN 040.46+02.46 -- HII Region: Sh2-76: Extremely weak oval glow, between two equal magnitude faint stars

LBN 111: LBN 041.37-18.83 -- Molecular Cloud.  Pretty large, extremely faint, irregular shape, in a box of stars.  

LBN 113: LBN 041.84-18.59 -- HII Region 70'x20': Faint but easily seen, large, area full of mottled nebula.  Can't find a good picture!

LBN 114: LBN 042.59-23.34 -- HII Region. 85'x30'.  Very faint, large, elongated through a field of bright stars.  Another I can't find a good image of.

LBN 115: LBN 042.75-21.54 -- HII Region:  35'x10', Fairly large, very faint, no clean edge.  No good image.

LBN 116: LBN 042.97-17.43 -- HII Region: 140'x80'.  2:1 elongated large cloud, faint, faintly mottled, soft edges.

LBN 119: LBN 043.64-21.66 -- HII Region: 140'x10'.  Long, thin faint stream of nebulosity, fills most of the field.

LBN 120: LBN 043.96-23.21 -- HII Region:  30'x35' Large, nearly round, with diffuse edges, in a large triangle of stars.  

LBN 122: LBN 044.95-20.39 -- HII Region: 42'x12': Large, diffuse, faint elongated nebula appears to be mingled with a large loose open cluster of faint stars.  

LBN 123: LBN 045.51-20.67 -- HII Region: In the same field, just above LBN 123, it is smaller, rounder, and a bit brighter.  

LBN 124: LBN 045.60-22.06 -- HII Region:  Fairly large, faint.  

LBN 125: LBN 046.20-21.45 -- HII Region:  Elongated faint nebula, fairly distinct edges.

27 august 2023 Delphinus Struves

After several weeks of non-observing due to clouds and generally poor conditions, it was clear enough last night to observe with the 6-inch.  A dozen wasps flew from under the tarp as I was removing it, so I looked around to see if a nest was being built -- I didn't see anything but hopefully there's not one in the mount.  There was a haze around the low waxing gibbous moon, so I had a look at it from around 8:20-9:00pm.  I noticed three very bright reflective mountain tops in the area of Schroter's Valley: the brightest was Mons Herodotus and there were two other peaks, closely separated, between it and Montes Agricola (which was not visible).  They were bright and compact enough to do a star test.  Seeing was not great but I was able to carry magnification to 200x.  The addition of filters helped my eyes but seemed to rob me of detail.  I was able to see four craterlets in Plato, through it was a couple days past best lighting.

I proceeded to observe the Struves in Delphinus, and completed the whole list in one go, closing up at around 10:40pm.

STF2662 AB: 152; 125x: Exceptionally fine, one delta faint b, nice close split, with high, steady and well seen.  -15% PRO, 511 AU WS, 2.2+1.5 Msol, and the RVD 1.9 < EV 3.6.  While the parallax doesn't support it being binary, an orbit should be tried all the same.

20h 18m 33.25s +10° 59' 31.5" P.A. 42.00 sep 2.0 mag 8.69,10.30 Sp A3

STF2664 AB: 152; 125x: Near equal white stars, wide.  Seen faintly with the 60mm too.  38% PRO, 6,708 AU WS, 2.5+2.4 Msol, and the RVD 0.2 < EV 1.1, it is likely binary and needs an orbit.

20h 19m 38.48s +13° 00' 17.2" P.A. 322.00 sep 27.8 mag 8.07,8.34 Sp K0 dist. 131.75 pc (429.77 l.y.)

STF2665 A-BC: 152; 125x: Lovely white and 3 Dm B, well split.  B not seen with the 60mm.  -54% PRO, it is not binary.

20h 19m 21.16s +14° 22' 14.6" P.A. 12.00 sep 3.3 mag 6.88,9.55 Sp KIII+BV+ dist. 167.79 pc (547.33 l.y.)

STF2670 AB: 152; 125x: "L" shaped asterism, two wide near equal and a third at 90-degrees and half the separation.  AB is the brighter pair, BC is the fainter.  None of their parallax ranges overlap, they are not binary.

20h 22m 12.39s +16° 22' 49.4" P.A. 153.00 sep 30.0 mag 8.99,9.19 Sp A8V dist. 934.58 pc (3048.6 l.y.)

STF2673 AB: 152; 175x: Very fine close split, 1 Dm, split 125x but better seen with higher power.  59% PRO, 305 AU WS, 1.7+1.2 Msol, it is likely binary and needs an orbit.

20h 22m 43.76s +13° 20' 25.4" P.A. 326.00 sep 2.4 mag 8.29,9.75 Sp F2

STF2674 CD: 152; 175x: One of the faint (3 Dm) stars in the field as STF 2673.  Not an impressive sight and probably measured just to check change in STF2673, it does not have Gaia parallax data.

20h 22m 48.91s +13° 20' 12.2" P.A. 1.00 sep 15.0 mag 8.60,11.43 Sp K0 dist. 279.33 pc (911.17 l.y.)

STF2679 AB: 152; 125x: Wide, with two other stars forming an equilateral triangle, each 1 Dm from the other.  None of the stars share parallax ranges, they are not binary.

20h 24m 22.59s +19° 34' 30.0" P.A. 77.00 sep 24.7 mag 7.88,9.69 Sp A2V dist. 244.5 pc (797.56 l.y.)

STF2680 AB: 152; 125x: Wide near equal in a rich milky way stream.  -49% PRO, it is not binary.

20h 24m 48.55s +14° 52' 05.4" P.A. 288.00 sep 16.2 mag 9.20,9.48 Sp A0V+B8V dist. 369 pc (1203.68 l.y.)

STF2686 AB: 152; 125x: Faint wide 1 Dm pair.  -70% PRO, it is not binary.

20h 29m 44.26s +10° 17' 58.1" P.A. 278.00 sep 25.8 mag 9.36,10.80 Sp A0

STF2688 AB: 152; 125x: Faint, wide, 1 Dm.  -87% PRO, it, is not binary.

20h 30m 48.26s +13° 47' 02.4" P.A. 175.00 sep 7.9 mag 9.35,10.41 Sp G0

STF2689 = STF2688 9.3/10.4 7.9" same as last 

STF2690 A-BC: 152; 125x: Easy bright white wide pair, seen with low power in both the 6-inch and 60mm.  Did not see DA 1 BC.  No parallax data for the secondary star.

20h 31m 11.94s +11° 15' 33.7" P.A. 255.00 sep 17.8 mag 7.12,7.39 Sp B8V dist. 59.99 pc (195.69 l.y.)

STF2701 AB: 152; 125x: Fine, slightly unequal light orange stars, split with 125x but better seen 175x.  Suspected at 90x with the 60mm.  92% PRO, 260 AU WS, 1.5+1.7 Msol, it is likely binary and needs an orbit.

20h 36m 58.85s +12° 02' 55.3" P.A. 221.00 sep 2.1 mag 8.32,8.59 Sp G5 dist. 117.65 pc (383.77 l.y.)

STF2703 AB: 152; 125x: "L" shaped asterism, all widely separated.  AB share 9% parallax ranges, wide 8,506 AU WS, 2.7+2.6 Msol, so there is a slight chance they are binary and an orbit should be tried.

20h 36m 49.41s +14° 43' 42.4" P.A. 290.00 sep 25.1 mag 8.35,8.42 Sp A5 dist. 440.53 pc (1437.01 l.y.)

STF2704 AB-D: 152; 125x: Large delta magnitude but very wide, not much to say.  A missing parallax in Gaia.

20h 37m 32.87s +14° 35' 42.7" P.A. 317.00 sep 47.8 mag 3.68,11.40 Sp F5IV dist. 30.93 pc (100.89 l.y.)

BU151 AB: 152; 300x: Rotanev, Beta Del.  Tough, seems a slight olive shaped elongation, but most of the time appears single, even with highest magnification.  Burnham obviously discovered this at apastron with his 6-inch...

20h 37m 32.87s +14° 35' 42.7" P.A. 218.00 sep 0.2 mag 4.11,5.02 Sp F5IV+F2V dist. 30.93 pc (100.89 l.y.)

STF2713 AB: 152; 125x: Faint, close, near equal pair, best seen low power.  41% PRO, 3,084 AU WS, 2.5+2.5 Msol, and the RVD 0.0 < EV 1.7, it is likely binary and needs an orbit.

20h 40m 55.07s +10° 34' 29.1" P.A. 62.00 sep 5.1 mag 9.80,9.80 Sp B9

STF2715 AB: 152; 125x: White 1 Dm, wide.  32% PRO, 1,063 AU WS, 1.5+0.8 Msol, but the RVD 2.5 > EV 2.0, it might not be binary but an orbit should be tried,

20h 41m 46.01s +12° 31' 07.1" P.A. 2.00 sep 12.4 mag 7.80,10.22 Sp F8 dist. 92.42 pc (301.47 l.y.)

STF2718 AB: 152; 125x: Near equal, white, wide, also seen with 60mm.  41% PRO, 1,509 AU WS, 2.0+1.9 Msol, it is possibly binary and needs an orbit tried.

20h 42m 33.47s +12° 43' 41.9" P.A. 87.00 sep 8.5 mag 8.28,8.39 Sp F5 dist. 144.51 pc (471.39 l.y.)

STF2720 AB: 152; 125x: Slightly unequal white stars, close with low power.  29% PRO, only 397 AU WS, 1.2+1.1 Msol, and the RVD 0.3 < EV 3.2, it is probably binary and needs an orbit.

20h 43m 27.91s +16° 56' 41.9" P.A. 177.00 sep 4.0 mag 9.22,9.56 Sp F8 dist. 100.5 pc (327.83 l.y.)

STF2722 AB: 152; 125x: Slightly unequal white stars, nice split.  -16% PRO, 1,258 AU WS, 1.9+1.6 Msol, RVD 0.5 < EV 2.2.  Stelle Doppie calls it physical but the parallax is against it, it is not likely binary.

20h 43m 38.82s +19° 43' 40.7" P.A. 306.00 sep 7.5 mag 8.32,8.94 Sp G5 dist. 239.23 pc (780.37 l.y.)

STF2723 AB: 152; 250x: Hairline split with seeing and high magnification only, more than a little unequal.  SOC grade 4 orbit 782-years.  But there is -9% PRO, 171 AU WS, 2.5+1.8 Msol, so it might or might not be binary and needs to be watched.

20h 44m 54.58s +12° 18' 45.6" P.A. 140.00 sep 1.0 mag 7.01,8.30 Sp A3IV dist. 209.21 pc (682.44 l.y.)

STF2725 AB: 152; 125x: Faint pair, nearly 1 Dm, well split.  -12% PRO, 226 AU WS, 1.1+0.9 Msol, it is probably not binary.

20h 46m 13.31s +15° 54' 26.4" P.A. 12.00 sep 6.2 mag 7.54,8.20 Sp K0 dist. 36.46 pc (118.93 l.y.)

STF2727 AB: 152; 125x: Very pretty light yellow-orange stars, nearly 1 Dm, well split, also seen in the 60mm at 40x.  8% PRO, 329 AU WS, 2.3+1.8 Msol, RVD 1.4 < EV 4.7, it likely is binary and has a SOC grade 4 orbit, 3249-year period.

20h 46m 39.50s +16° 07' 27.4" P.A. 266.00 sep 8.8 mag 4.36,5.03 Sp K1IV+F7V dist. 38.73 pc (126.34 l.y.)

STF2730 AB: 152; 125x: Fairly close yellow stars, unequal, seen in 60mm at 40x.  46% PRO, 1,155 AU WS, 2.7+2.8 Msol, it likely is binary and needs an orbit.

20h 51m 03.77s +06° 23' 14.1" P.A. 333.00 sep 3.3 mag 8.43,8.57 Sp K1III

STF2733 AB: 152; 125x: Wide, near equal, white.  78% PRO, 5,377 AU WS, 1.6+1.6 Msol, RVD 0.1 < EV 1.0, it likely is binary and needs an orbit.

20h 52m 42.97s +07° 19' 47.6" P.A. 145.00 sep 40.2 mag 8.39,8.58 Sp A

STF2734 AB: 152; 125x: Wide unequal.  -97% PRO, it is not binary.

20h 54m 03.68s +13° 06' 14.8" P.A. 227.00 sep 24.4 mag 9.39,9.82 Sp G0

STF2735 AB: 152; 175x: Excellent light orange and nearly 2 Dm blue B, closely split with 125x, better seen 175x.  Suspected 40x in the 60mm and tentatively, very finely split with 90x, B appeared as the smallest blue dot with seeing.  7% PRO, 224 AU WS, 1.8+2.5 Msol, it is possibly binary and needs an orbit tried.

20h 55m 40.64s +04° 31' 57.7" P.A. 282.00 sep 2.0 mag 6.45,7.54 Sp G6III-IV dist. 141.64 pc (462.03 l.y.)

STF2736 AB: 152; 125x: Well split, unequal.  61% PRO, 1,058 AU WS, 2.1+1.6 Msol, RVD 0.9 < EV 2.5, it is likely binary and needs an orbit.

20h 56m 43.74s +12° 59' 33.8" P.A. 219.00 sep 5.3 mag 8.34,9.36 Sp F2 dist. 294.99 pc (962.26 l.y.)

STF2738 AB: 152; 125x: Wide, significant delta.  6% PRO, 5,449 AU WS, 3.2+2.5 Msol, it might be binary and needs an orbit.

20h 58m 32.23s +16° 26' 12.2" P.A. 254.00 sep 15.0 mag 7.51,8.57 Sp F5V+A0 dist. 100.4 pc (327.5 l.y.)

STF2750 A-BC: 152; 125x: Wide, 1 Dm.  -90% PRO, it is not binary.

21h 05m 02.23s +12° 43' 20.5" P.A. 280.00 sep 16.0 mag 8.96,10.40 Sp K0 dist. 128.7 pc (419.82 l.y.)

STF2754 AB: 152; 125x: Wide, 1 Dm. -95% PRO, it is not binary.

21h 06m 11.70s +13° 10' 56.8" P.A. 298.00 sep 29.7 mag 9.16,10.60 Sp K5