loads of doubles

Most of this week has had very good seeing, sometimes excellent with perfect round airy disks and next to no diffraction.  Tonight is clear too, but I feel a little tired, and seeing is predicted to be merely "good."  So I thought to catch up on my observations.  Big Blue, 553x except as noted.  S: 7-9/10, T4-4.5/5.  A couple Open Clusters thrown in for good measure.

BU 1133: Tough find, dense field.  Very temporary brightening in diffraction, 20% held.  This is a tough one, <1" and large delta mag.
19H 59M 39.13S +31° 49' 35.4" P.A. 342 SEP 1.1 MAG 6.67,9.91 SP A0 DIST. 158.98 PC (518.59 L.Y.)

ES 357: Moderately bright, 8th mag, with 3 delta mag B well separated.  Seeing a little shimmery. [There's a chance what I saw was STT 389 (AC) which is 9.53 mag and 12.6"]
19H 51M 41.33S +31° 08' 16.1" P.A. 309 SEP 10.1 MAG 7.12,12.40 SP F0IV DIST. 215.98 PC (704.53 L.Y.)

BU 980: Somewhat in glare of A but saw B momentarily with averted vision.  Two faint either side, B closer in.  [Complicated system, AB AE CE CF.  What happened to D?]
19H 56M 18.40S +35° 05' 00.6" P.A. 206 SEP 7.8 MAG 3.89,12.00 SP K0III DIST. 41.37 PC (134.95 L.Y.)

STF 2606: Hair split to clean split when seeing stills and there is only an airy disk.  Near equal, half a delta mag. 0.8" [Good catch! 0.66"! 1.2" at discovery, so old Wilhelm could see it.]
19H 58M 32.66S +33° 16' 38.8" P.A. 146.8 SEP 0.66 MAG 7.74,8.43 SP F5IV DIST. 78.43 PC (255.84 L.Y.)

STT 398: B is very faint, appears as a brightening or pin-prick in A's diffraction.  2-3 delta mag, 1"
20H 07M 23.69S +35° 43' 05.9" P.A. 82 SEP 1 MAG 7.45,9.20 SP B0IV DIST. 628.93 PC (2051.57 L.Y.)

STF 2633: 3 delta mag, wide, 2 more on the opposite side.  [4 stars visible; AC & AC = HJ 1483; CD = SEI 900, not seen]
20H 07M 57.93S +32° 35' 10.8" P.A. 101 SEP 11.6 MAG 7.95,11.01 SP B8III DIST. 558.66 PC (1822.35 L.Y.)

SEI 917: Star with arc of three.  B is very faint, closer in to brightest in center, which I take to be A.  Another double is just below this, near equal, orange.
20H 08M 53.54S +35° 30' 46.4" P.A. 338 SEP 28.5 MAG 8.42,12.62 SP B0V

ES 244: 8th & 12th mag, wide separation.  B looks like a faint double itself with averted vision.  How to tell which is the double; how discover them?  The field is so dense any could be a pair. [It is in fact a quadruple system.]
20H 14M 25.83S +35° 24' 25.6" P.A. 130 SEP 41.2 MAG 8.44,12.25 SP B7V

BLL 41: B very wide, very faint from A.  A is orange, B also a little orangish.  Other stars in field could be candidates.  [Quadruple system, all pairs 12th mag.]
19H 40M 57.00S +32° 37' 05.7" P.A. 212 SEP 69.9 MAG 7.88,12.32 SP N DIST. 561.8 PC (1832.59 L.Y.)

South of STF 2624: 277x: Orange and very faint bluish pair ~8", 2 delta mag.  B not quite resolved, more of a mist.

STF 2624: 277x. A with 2x fainter B well separated, plus an arc of 3 stars. [4 stars in system, AB AC AD BC]
20H 03M 29.42S +36° 01' 28.6" P.A. 174 SEP 2 MAG 7.09,7.73 SP O9.5IIIE DIST. 862.07 PC (2812.07 L.Y.)

STF 2580 = 17 Cyg: 277x. Yellow and slightly red, well separated, 1 delta mag. [This is an amazingly complex system with 11 stars in all sorts of combinations.  Why not just call it an open cluster?  And are they sure all the orbits are true?]
19H 46M 25.60S +33° 43' 39.3" P.A. 68 SEP 25.9 MAG 5.06,9.25 SP F5V DIST. 21.23 PC (69.25 L.Y.)

STT 387: 277x. Red, very close pair?  Seeing not supporting.  Or one of several faint B about. [I may have gotten it; if the seeing was better I might've noticed the 0.5" pair.]
19H 48M 43.81S +35° 18' 41.3" P.A. 106.7 SEP 0.47 MAG 7.12,7.90 SP F6V DIST. 63.69 PC (207.76 L.Y.)

Arn 82: 277x.  Curious, seems a little cluster, several pairs, all wide, in a kind of string.  [I must have missed it in a rich field since it is only a triple system.  Needed exact location / chart.]
19H 36M 21.91S +35° 40' 39.7" P.A. 34 SEP 43.5 MAG 8.10,8.43 SP A

STF 2534: 277x: Near equal white, 7-8"
19H 27M 40.63S +36° 31' 44.4" P.A. 63 SEP 6.3 MAG 8.21,8.39 SP B9III DIST. 900.9 PC (2938.74 L.Y.)

NGC 6819: 277x.  Boxy open cluster with no real concentration, though clumps of unresolved starts.  ~20 resolved but unorganized mist.  Fairly well separated, moderately rich.  [I1r -- maybe should have tried lower power.]

STT 383: 277x. B could be any of several faint companions in field. [Should have tried harder for this one, a 0.8" -- but wasn't able to use enough magnification.]
19H 42M 56.26S +40° 43' 18.3" P.A. 15 SEP 0.8 MAG 7.03,8.28 SP B9.5V DIST. 154.56 PC (504.17 L.Y.)

V 973: Bright pumpkin orange.

Lep 94: Some faint stars -- seemingly unimpressive.  [faint and very wide -- not much to notice]
19H 49M 18.13S +41° 34' 56.8" P.A. 68 SEP 65.9 MAG 7.53,10.47 SP F5 DIST. 52.55 PC (171.42 L.Y.)

STF 2607: Very close clean split though B is in A's diffraction; somewhat bluish.  [AB,C seen, AB spectroscopic.  4.3" at discovery, easier for WS.]
19H 57M 56.12S +42° 15' 38.9" P.A. 289 SEP 3 MAG 6.56,9.09 SP A3V DIST. 325.73 PC (1062.53 L.Y.)

NGC 6866: 277x: widely dispersed and elongated with a branch of stars coming off it E-W.  Wide brightness range, ~20 brighter over diffuse mist of stars.  II2m

STF 2579 = Delta Cyg.  Bright white with 4 or more much fainter possible companions.  [7 visible stars in system]
19H 44M 58.44S +45° 07' 50.5" P.A. 216.6 SEP 2.74 MAG 2.89,6.27 SP B9.5IV DIST. 50.58 PC (164.99 L.Y.)

NGC 6811: Pretty large lucida, is mixed, no concentration, loops of stars.  IV3p

STT 386: Tight near equal, nice, split with seeing, 1"
19H 48M 16.51S +37° 09' 37.5" P.A. 70 SEP 0.9 MAG 8.52,8.61 SP A1III DIST. 2222.22 PC (7248.88 L.Y.)

STT 384: Nice near equal 1", rest of field angular with stars [AB seen, AC and AD in the field.]
19H 43M 47.09S +38° 19' 20.5" P.A. 197 SEP 1 MAG 7.59,8.23 SP B5V DIST. 675.68 PC (2204.07 L.Y.)

STT 385: Yellow disk with fine blue point, with seeing, 1-1.5"
19H 45M 48.77S +40° 33' 18.9" P.A. 51 SEP 1.2 MAG 7.77,9.58 SP B7IV DIST. 793.65 PC (2588.89 L.Y.)

ARG 39: Wide separation, red-yellow pair. [AB seen; 7 visible stars in complex pattern.]
20H 42M 29.79S +49° 15' 59.1" P.A. 183 SEP 15.1 MAG 8.42,8.93 SP K5

ES 93: Yellow-orange with wide 2 delta mag blue B.
20H 47M 52.97S +52° 24' 25.8" P.A. 320 SEP 25.1 MAG 6.38,10.84 SP G7IV DIST. 42.52 PC (138.7 L.Y.)

BU 155: Clean split, nice disks, 1 delta mag, 1".  Pale yellow and pale easter egg blue. [AB seen, 4 stars visible.]
20H 51M 05.41S +51° 25' 01.7" P.A. 38 SEP 0.7 MAG 7.36,8.13 SP A9IV DIST. 124.53 PC (406.22 L.Y.)

STF 2741: Bright A, yellow and blue, 2" 1 delta mag.  [AB seen, 4 stars seen.]
20H 58M 30.03S +50° 27' 42.4" P.A. 25 SEP 2 MAG 5.94,6.79 SP B5VN DIST. 331.13 PC (1080.15 L.Y.)

ES 800: Like a string, 2 fainter.  Uncertain what's what.  [7 stars visible, too many, no wonder can't tell...]
20H 20M 01.12S +51° 15' 33.7" P.A. 321 SEP 29.6 MAG 9.06,10.51 SP K3III

STF 2681: ! Nice.  3x fainter B, ~4", another wide pair below. [AB seen; 4 stars in system.]
20H 22M 49.54S +53° 25' 02.8" P.A. 41 SEP 7.2 MAG 7.97,10.61 SP A0V DIST. 448.43 PC (1462.78 L.Y.)

Ho 455: Carbon star with very faint arc of 3 stars and one other star.  Interesting!  Can see direct vision but averted brightens.  [5 stars in system.  Star is M0, red]
20H 15M 13.60S +54° 08' 47.6" P.A. 82 SEP 35.8 MAG 7.46,12.00 SP M0 DIST. 420.17 PC (1370.59 L.Y.)

AC 17: !! Wow.  Pretty orange-yellow and much fainter 3-4 delta mag B, resolves into view with seeing, just appears then vanishes if seeing quavers.  ~4".  [AB seen.  5 stars in system.]
20H 12M 31.73S +51° 27' 49.0" P.A. 83 SEP 4.3 MAG 6.17,10.55 SP K2.5III DIST. 106.16 PC (346.29 L.Y.)

STT 411: Carbon star with a number of possible pairs. [9 stars... OC?]
20H 42M 20.31S +45° 49' 24.5" P.A. 349 SEP 31.5 MAG 7.66,10.58 SP G2V DIST. 54.14 PC (176.6 L.Y.)

HJ 1581: Bright yellow with 3x fainter blue B, very wide.
20H 48M 56.29S +46° 06' 50.8" P.A. 174 SEP 22.7 MAG 4.82,11.14 SP B3IAE DIST. 714.29 PC (2330.01 L.Y.)

BU 250: Bright with 2x fainter, very wide.
20H 49M 54.64S +46° 39' 40.8" P.A. 7 SEP 18.4 MAG 6.33,11.50 SP B4VE DIST. 492.61 PC (1606.89 L.Y.)

STF 2707: Split in finder.  Ice blue, in a string of five stars [AB seen.  The string of stars comprise other components of the system, AC, AD, BC, which have the same PA of about 195.]

20H 37M 51.14S +47° 56' 41.9" P.A. 29 SEP 21.6 MAG 7.94,9.45 SP A0 DIST. 172.12 PC (561.46 L.Y.)

ES 30: Very wide with a very faint B, off to the side.

20H 46M 04.55S +44° 52' 09.6" P.A. 58 SEP 17.2 MAG 9.62,12.50 SP F8IB

STT 416: Orange & yellow pair, very wide, 1 delta mag. [AB seen.  AC fainter and much wider.]

20H 51M 58.64S +43° 45' 28.7" P.A. 118 SEP 9.6 MAG 8.64,8.94 SP G8IV+A3M DIST. 363.64 PC (1186.19 L.Y.)

STT 420: ! Light yellow A and reddish B, very faint, very wide, 3 delta mag.

20H 54M 22.25S +40° 42' 10.6" P.A. 2 SEP 5.5 MAG 6.69,10.50 SP B8VNNE DIST. 248.14 PC (809.43 L.Y.)

STF 2731: Yellow A and slight blue B, wide ~10”, 1-2 delta mag. [AB seen, AC and AD much fainter]

20H 49M 00.64S +39° 47' 29.9" P.A. 85 SEP 4.2 MAG 7.65,9.59 SP B9IV DIST. 497.51 PC (1622.88 L.Y.)

47 Cyg: Carbon yellow-orange disk, maybe not round.  Many faint companions. [WRH 34 is AB, 0.3 4.84/7.30.  Not sure it could be seen as out of roundness.  BU 1490 is AC, 115.1" and 4.82/11.87]

20H 33M 54.19S +35° 15' 03.1" P.A. 278 SEP 0.3 MAG 4.84,7.30 SP K2IB+B3V DIST. 847.46 PC (2764.41 L.Y.)

STF 2702: Fine near equal, well split 4”

20H 35M 34.94S +35° 10' 10.8" P.A. 205 SEP 3.1 MAG 8.70,8.99 SP A0

STT 419: ! Tough, needed to wait for a while for right seeing.  Bright yellowish A with brightening in diffraction which stays put and recedes to a fine point momentarily with the seeing. 

20H 54M 42.00S +37° 04' 25.3" P.A. 23 SEP 1.6 MAG 7.20,9.97 SP A0 DIST. 193.8 PC (632.18 L.Y.)

STF 2711: White, 1 delta mag, 3”.  2+1 double?  Another star wide separation [Not 2+1]

20H 39M 35.12S +30° 30' 14.6" P.A. 223 SEP 2.4 MAG 8.17,9.24 SP A2.5V DIST. 344.83 PC (1124.84 L.Y.)

HO 137: Needs more resolving power.  At 553x some out of roundness to the disk, but not certain.  Used 885x with apodizing mask some lumpiness to dusk but it dances around.  The companion is too faint to show up as out of roundness anyway.

20H 40M 36.26S +29° 48' 19.6" P.A. 352 SEP 0.7 MAG 6.13,9.26 SP A2V DIST. 74.24 PC (242.17 L.Y.)

STT 418: Near equal 1” split, white.

20H 54M 49.84S +32° 42' 23.2" P.A. 283.5 SEP 0.95 MAG 8.23,8.27 SP G0 DIST. 60.72 PC (198.07 L.Y.)

BU 677: Orange with very faint blue, very wide separation. [Not sure if AB 10.03 mag or AC 11.20 mag was seen, did not note PA -- I should turn off the platform at first so I know where west is in the field.]

20H 47M 10.72S +34° 22' 26.8" P.A. 120 SEP 8.1 MAG 4.94,10.03 SP K3III DIST. 136.43 PC (445.03 L.Y.)

Lambda Cyg = STT 413: !! 1.5 delta mag, blue-white.  Bright mess resolves to two disks 0.8-1.0”, with seeing. [AB seen, there are six stars in the system]

20H 47M 24.53S +36° 29' 26.7" P.A. 359.3 SEP 0.92 MAG 4.73,6.26 SP B5VE DIST. 235.85 PC (769.34 L.Y.)

AGC 13 = Tau Cygni: Near equal orange with fainter nearby, could be triple. [AB seen.  There are 13 stars in the system.  They ought to just call it an open cluster...]

21H 14M 47.49S +38° 02' 43.1" P.A. 196.5 SEP 0.96 MAG 3.83,6.57 SP F3V+F7V DIST. 20.34 PC (66.35 L.Y.)

Sei 1445: 553x, faint red star pair, near equal?  885x, reddish, with airy disk but nothing closeby [No; B is very faint and wide.  Probably had the wrong star since the spectral class for A is blue-white, not red]

21H 12M 29.51S +38° 33' 59.4" P.A. 23 SEP 28 MAG 7.32,11.90 SP B9 DIST. 2325.58 PC (7586.04 L.Y.)

STF 2762: Blue-white A and reddish B.  2 delta mag, ~5” [AB seen; AC & AD fainter & wider]

21H 08M 38.87S +30° 12' 20.5" P.A. 304 SEP 3.3 MAG 5.70,8.10 SP B9V DIST. 115.74 PC (377.54 L.Y.)

BU 445: !! Orange-red with exceptionally fainter B, only when seeing stills, else it is lost in the diffraction.  Pinpoint.  2”, 4 delta mag.  [AB seen.  There are six stars in the system]

21H 03M 29.53S +29° 05' 33.0" P.A. 109 SEP 4.8 MAG 7.00,11.14 SP G8III DIST. 197.24 PC (643.4 L.Y.)

STF 2716 = 49 Cygni: 277x Pretty orange and blue, 1.5-2.0 delta mag, ~2”.  [AB seen, AC wide and faint]

20H 41M 02.54S +32° 18' 26.3" P.A. 45 SEP 2.8 MAG 5.75,8.10 SP G2III DIST. 244.5 PC (797.56 L.Y.)

BU 67: ! Pale blue A and 3 delta mag B, ~2”.  In the middle of the Cygnus Loop.

20H 50M 36.05S +30° 54' 45.7" P.A. 311 SEP 1.5 MAG 6.85,9.87 SP A8III DIST. 120.05 PC (391.6 L.Y.)

Ary 48: !! A beautiful split in finder, just equal pair, wide separation, white with red tint.

20H 37M 45.00S +32° 23' 42.9" P.A. 41 SEP 53.3 MAG 8.23,8.76 SP F8

STFA 53 = 48 Cygni: Wide equal pair, easy in finder.  [AB seen; 8 stars in system]

20H 37M 31.77S +31° 34' 21.1" P.A. 177 SEP 182.7 MAG 6.29,6.54 SP B8III+F0V DIST. 261.78 PC (853.93 L.Y.)

52 Cygni = STF 2726: I use this one to find the Western Veil in the Telrad.  Bright orange and 3 delta mag blue B, ~7”

20H 45M 39.76S +30° 43' 10.8" P.A. 70 SEP 6 MAG 4.33,9.53 SP G9III DIST. 61.65 PC (201.1 L.Y.)

STF 2705: Close separation equal reddish.  Look similar to the nearby Ary 48 stars; I wonder if they were formed in the same cloud? [AB seen, 5 stars in system]

20H 37M 44.32S +33° 21' 59.4" P.A. 261 SEP 3.2 MAG 7.48,8.54 SP K0IIB DIST. 595.24 PC (1941.67 L.Y.)  

STT 408: ! Very fine dull white A and pinpoint B, split well with seeing, ~2”

20H 34M 01.96S +34° 40' 44.4" P.A. 193 SEP 1.6 MAG 6.75,9.37 SP B7V DIST. 332.23 PC (1083.73 L.Y.)

NGC 6940: Large, loose, moderately rich open cluster, needs more respect and attention with the Veil as a neighbor.  Nice red star in middle of the sprawl, like M37.  III2m

NGC 6885: 170x, centered around a brighter star [20 Vulpeculae], more concentrated to west, III2p.  Between it and red star is NGC 6882, poor and dispersed.  101x, NGC 6882 is small, faint and compact, NGC 6885 is large and loose.  [NGC/IC thinks the two designations are for the same object, NGC 6882 being a concentration of NGC 6885]

HO 588: Blue-white with 1 delta mag, very wide twin – though I can’t decide if A is out of round. [AB seen; there is an AC 12.6 mag in opposite PA not seen]

20H 16M 54.99S +31° 30' 18.7" P.A. 297 SEP 50.8 MAG 6.91,8.89 SP A0III DIST. 189.39 PC (617.79 L.Y.)

S 780 = 69 Cygni: Bright with much fainter wide, could be a triple. [AB seen; is a triple with a 10.22 mag C]

21H 25M 47.02S +36° 40' 02.5" P.A. 29 SEP 34.7 MAG 5.89,11.71 SP B0IB DIST. 2777.78 PC (9061.12 L.Y.)

NGC 7063: 101x.  Visible in finder with some stars resolved.  Large loose cluster, ~30 stars resolved, with about 3 delta mags between them.  A central “S” curve of stars N-S, but otherwise a gangly cluster.  III2p

HO 603: !!  Very wide 2 delta mag, but B has a fainter close pair to it, seen with averted vision, about 3” separation. [AB 7.53/9.82 80.5"; BC 9.82/11.30 3.6"

21H 32M 04.61S +34° 12' 06.1" P.A. 251 SEP 80.5 MAG 7.53,9.82 SP F0 DIST. 96.9 PC (316.09 L.Y.)

BU 692: Pair to the star could be any of the several faint wide stars about. [Should have tried harder on this one.  AB is 2.9".  Yes, there are many faint stars in the system, 5 in all.]

21H 50M 05.37S +31° 50' 52.4" P.A. 10 SEP 2.9 MAG 7.47,11.03 SP K0 DIST. 181.16 PC (590.94 L.Y.)

STF 2822: Yellow, 1 delta mag, 2-3” [AB seen; 7 stars in the system.]

21H 44M 08.57S +28° 44' 33.4" P.A. 323.2 SEP 1.52 MAG 4.75,6.18 SP F6V+G2V DIST. 22.24 PC (72.55 L.Y.)

BU 167: Tried pretty hard to see it at 885x, but can’t see a pair or any out of round.  Orange-red star.

21H 36M 13.98S +30° 03' 19.5" P.A. 89 SEP 1.8 MAG 6.37,9.95 SP G8III DIST. 110.86 PC (361.63 L.Y.)