Thursday, June 25, 2020

25 june 2020

Lasted longer this night, one hour of observing.  Started after 10pm due to lingering summer twilight.  Seeing was frustratingly poor -- not at all as good as the forecast -- even the 8-inch mask produced only 5/10.  Had to shut down by 11pm due to marine layer moving in.

STF 1935 AB: 203; 205x: Wide, slight mag difference. 
15H 20M 13.27S +30° 41' 44.2" P.A. 289 SEP 8.6 MAG 9.91,10.19 SP G5 DIST. 86.66 PC (282.68 L.Y.)

PPM 103998 (not in the WDS) 203; 333x: At best moments, when smear seeing stills, two points resolve, bluish for faintness, and noticeable mag difference.  <1" separation.

TDS9506 AB: 203; 333x: Snowman only.  Seeing too poor to push higher
15H 24M 07.11S +28° 13' 55.2" P.A. 36 SEP 0.5 MAG 10.64,10.84

A 1369 AB: 203; 333x: ~1 delta mag, close ~4", white, B a little winkey due to seeing.  C is wide and brighter.  
15H 28M 46.74S +31° 00' 46.4" P.A. 317 SEP 4.2 MAG 10.66,11.46 SP G8V

HO 63 AB: 203; 333x: This is an unequal pair, needed averted vision to flash B and only when seeing is good will it split. 
15H 35M 47.09S +28° 22' 51.3" P.A. 311 SEP 1.5 MAG 10.88,11.23

COU 799 AB: 203; 333x: Split with seeing, bluish stars, noticeable mag difference 
15H 35M 59.13S +31° 42' 38.8" P.A. 265 SEP 1 MAG 10.82,11.16

STF 2055 AB: 203; 205x: Marfic. Nice blazing white pair, ~1 delta, ~2".  129 year period, but not much change in the next few years
16H 30M 54.84S +01° 59' 02.8" P.A. 44.5 SEP 1.41 MAG 4.15,5.15 SP A0V+A0V DIST. 53.08 PC (173.15 L.Y.) 
grafico orbita

STF 2062 AB: 203; 205x: Significant delta mag ~2, ~2-3", B seen with seeing
16H 34M 44.14S +08° 45' 54.2" P.A. 108 SEP 2.4 MAG 9.07,10.61 SP G0
  
STT 314 AB: 203; 205x: B is blue and sharp with seeing, light yellow A is ~3 magnitudes brighter, ~4".
16H 38M 51.50S +20° 27' 57.6" P.A. 236 SEP 3.5 MAG 8.20,11.20 SP K2 

HU 486 AB: 203; 205x: Very fine at this magnification, just split with seeing and just visible. 
16H 39M 29.32S +22° 43' 59.7" P.A. 164 SEP 1.2 MAG 10.23,10.89 SP F8

BU 42 AB: 203; 205x: Significant magnitude difference, wide white stars 
16H 40M 05.82S +29° 00' 41.0" P.A. 41 SEP 7.5 MAG 10.19,10.66 SP G0

STF 2084 AB: 203; 533x: Zeta Her.  B seen, not too difficult as a disk within the diffraction of bright A, just outside first ring so ~1.5", like a diamond ring, significant mag difference.  ** I need to re-observe this since it's a short period pair **
16H 41M 17.16S +31° 36' 09.8" P.A. 111.8 SEP 1.36 MAG 2.95,5.40 SP G1IV DIST. 10.72 PC (34.97 L.Y.)
 grafico orbita

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