Tuesday, October 13, 2020

12 october 2020

Seeing last night was mediocre, and transparency was only a little better than average.  Nevertheless it was a good session.  I observed from 9-11pm, with the 8-inch mask on throughout.  Seeing at 205x was fine, but it sometimes affected 333x too -- though when it settled the star images were sharp.  Perfect optics.  I toured around in the northern part of the sky.

STF 2863 AB; 203; 205x:  Alkurhah.  Pretty very light yellow bright A star, and ~2 delta mag, very light orange B, wide.  Physical pair with a 3800 year period.  
22H 03M 47.45S +64° 37' 40.7" P.A. 273.5 SEP 8.44 MAG 4.45,6.40 SP A3M DIST. 29.59 PC (96.52 L.Y.)

STT 461 AB: 203; 205x: 15 Cep. At the end of a mini coat hanger asterism, and in fact there are 7 pairs in the system (likely not physical, maybe a small cluster).  A is white and B is very much fainter but seen with direct vision, wide. 
22H 03M 53.86S +59° 48' 52.5" P.A. 297 SEP 11.1 MAG 6.66,11.40 SP B1V DIST. 450.45 PC (1469.37 L.Y.) 

ES 103 AB: 203; 205x: Delicate pair at this magnification, white stars, half delta, very close a little more than 1".  Very attractive
22H 05M 28.85S +54° 22' 38.1" P.A. 211 SEP 1.8 MAG 9.72,10.41 SP A0

STF 2870 AB: 203; 205x: Easy pair, >1 delta mag, wide.  An arrow asterism points to it.
22H 08M 00.45S +61° 07' 22.0" P.A. 271 SEP 5.8 MAG 8.85,9.64 SP B9 DIST. 980.39 PC (3198.03 L.Y.)

STF 2879 AB: 203; 205x: V447 Cep  ! Excellent pair, seen at small scale at this magnification.  Nice clean split, half delta mag, really pretty.  A is variable 7.26 - 7.62 V over a period of 7.52655 days, but there is a lack of recent observations on AAVSO.  If it were near maximum it might be more difficult to resolve the split at small aperture.  I also pick up a very faint white star the averted vision, widely separated -- this is AC, 7.99/11.91 29.2.  FYM 192 AD, mag 12.98, not seen
22H 10M 59.56S +63° 23' 58.5" P.A. 233 SEP 0.7 MAG 7.99,8.26 SP B5 DIST. 943.4 PC (3077.37 L.Y.)

A 625 AB: 203; 333x: Faint stars, hairline split with seeing, light orange color, noticeable magnitude difference, tough.
22H 11M 44.77S +57° 42' 58.1" P.A. 79 SEP 0.5 MAG 9.55,9.37 SP A2

STF2880 AB: 203; 205x: Light yellow-orange stars, B is a duller orange, well separated, ~3 delta.  Not physical 
22H 11M 48.22S +59° 43' 15.1" P.A. 354 SEP 4.2 MAG 7.43,9.30 SP G8II

BU 376 AB: 203; 205x: Remarkable, very light orange A star and B appears with averted vision, and then I can hold it direct after foveal coaxing.  ~4".  Nice.  Burnham discovered in his 6-inch at 3.57", it hasn't substantially moved -- testament to his scope, vision, and darker skies.
22H 12M 02.66S +60° 05' 25.7" P.A. 149 SEP 3.8 MAG 7.98,11.20 SP K5

STF 2884 AB: 203; 205x: White pair, significant ~2 delta mag, ~3" separation, nice pair
22H 12M 13.02S +63° 44' 19.4" P.A. 143 SEP 2.2 MAG 8.03,9.58 SP B9IV

A 626 AB: 203; 205x: Very fine hairline split with seeing, white stars, half delta mag. 
22H 12M 44.62S +60° 13' 05.3" P.A. 109 SEP 0.9 MAG 9.52,9.65 SP G0

FOX 265 AB: 203; 205x: ~2 delta mag, pretty wide, unremarkable, but physical, even though they're 1200 light years away
22H 14M 16.14S +61° 55' 13.7" P.A. 176 SEP 5.5 MAG 8.88,10.31 SP A0 DIST. 367.65 PC (1199.27 L.Y.)

STF 2903 AB: 203; 205x: Bright white stars, ~1 delta, wide
22H 21M 45.20S +66° 42' 22.6" P.A. 97 SEP 4.1 MAG 7.13,7.80 SP A7V+G0III DIST. 268.82 PC (876.89 L.Y.)

STT 473 AB: 203;205x: Nice contrast of bright white A star with a not too wide faint pair.  Not physical
22H 30M 18.70S +57° 13' 31.6" P.A. 359 SEP 14.6 MAG 6.74,10.48 SP A3IA DIST. 1960.78 PC (6396.06 L.Y.)

HU 981 AB: 203; 667x: Notched elongation with 333x & 667x.  Slight mag difference.  Need more aperture (934 year period, 0.29" now!)
22H 30M 32.63S +61° 37' 25.6" P.A. 213.1 SEP 0.29 MAG 7.61,7.90 SP B8V DIST. 724.64 PC (2363.78 L.Y.)

STF 2977 AB: 203; 205x: ! Wow very nice.  Split with seeing, bright white A settles to round and B appears as a blue disk just outside A's diffraction, light blue color, really a treat.  Physical 
23H 06M 28.56S +61° 26' 24.5" P.A. 355 SEP 1.8 MAG 6.80,10.33 SP F5V DIST. 112.99 PC (368.57 L.Y.)

BU 180 AB: 203; 533x: Snowman through 533x.  Just too much of a delta mag.  Burnham discovered with his 6-inch at 0.57"!  Physical, 537 year period. 
23H 07M 09.99S +60° 49' 57.1" P.A. 130.8 SEP 0.51 MAG 7.95,9.23 SP A5IV DIST. 255.75 PC (834.26 L.Y.)

STF3001 AB: 203; 205x: A is bright yellow, B dull yellow, ~3 delta mag and ~3 separation, a striking pair.  Physical, 1505 year period.
23H 18M 37.41S +68° 06' 41.1" P.A. 223.4 SEP 3.38 MAG 4.97,7.28 SP G8III DIST. 62.27 PC (203.12 L.Y.)

STT 502 AB: 203; 205x: B is very delicate compared bright white A,  ~4" and ~4 delta mag. Very nice.  Physical.
23H 39M 52.92S +63° 43' 31.6" P.A. 226 SEP 3.6 MAG 6.89,10.64 SP A3V DIST. 110.99 PC (362.05 L.Y.)

STF 3004 AB: 203; 205x: Easy white and blue stars, wide
23H 20M 44.10S +44° 06' 58.2" P.A. 178 SEP 13.6 MAG 6.26,10.13 SP A5VN DIST. 75.24 PC (245.43 L.Y.)

STF 3034 AB: 203; 205x: V395 And.  White, wide, ~2 delta mag. 
23H 44M 32.14S +46° 22' 48.6" P.A. 103 SEP 5.6 MAG 7.68,9.86 SP B8V DIST. 267.38 PC (872.19 L.Y.)

STT 499 A-BC: 203; 205x: Very light orange-yellow A and light blue B, wide, two delta.  Physical.  BC is A 641, 9.7/11.5, 0.3", not seen
23H 33M 12.21S +57° 24' 28.5" P.A. 77 SEP 9.7 MAG 7.55,9.54 SP G5 DIST. 106.95 PC (348.87 L.Y.)

A 642 AB: 203; 205x: Notched elongation through 533x.  Physical pair. 
23H 37M 53.77S +58° 05' 43.4" P.A. 27 SEP 0.8 MAG 8.86,10.16 SP F0 DIST. 371.75 PC (1212.65 L.Y.)

STF 3037 AB: 203; 205x: Fine pair, ~1 delta mag, fairly wide, light yellow stars
23H 46M 08.04S +60° 28' 23.4" P.A. 212 SEP 2.7 MAG 7.35,9.20 SP K0 DIST. 361.01 PC (1177.61 L.Y.)

STF3038 AB: 203; 205x: Very fine pair, near equal, near bright star, wide ~5".  Not physical
23H 46M 11.11S +62° 40' 05.0" P.A. 275 SEP 4.4 MAG 10.06,10.09 SP M1IAB+OB

STT 507 AB: 203; 333x: Snowman at 205x, hairline split with 333x, A is a soft white and B is light blue, ~1 delta mag.  Physical with 565 year period.
23H 48M 39.03S +64° 52' 35.3" P.A. 319.5 SEP 0.7 MAG 6.76,7.76 SP A0P DIST. 168.63 PC (550.07 L.Y.)

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