Thursday, October 10, 2019

9 october 2019

The night was nearly a total bust. Very poor seeing and bad transparency from a marine haze. There was not much ground wind but seems the atmosphere above was very turbulent, likely the winds which caused PG&E to shut off power for much of Northern California to forestall wildfires. I had a few satisfying observations of a double stars. There was a lot I skipped over since I couldn't even satisfactorily observe 9th magnitude stars, with a nearly full moon up. I tried the moon at the end but backed off magnification all the way to 87x, and basically looked at the ray patterns with an orange filter. The view is still hurt by poor transparency; don't let anyone fool you that transparency doesn't matter with the moon, or anything else.

STF 2583 AB Pi Aql 8" 205x Pretty yellow-orange A and a little more than 1 delta mag pale blue B, ~1", yet neatly separated.
19h 48m 42.05s +11° 48' 57.3" P.A. 106 sep 1.4 mag 6.34,6.75 Sp A3V+F9III dist. 157.73 pc (514.52 l.y.)

STF 2587 AB 8" 205x" Bright orange A star and faint bluish grey B which appears when seeing stills a fine point, ~4.5" [not physical]
19h 51m 26.83s +04° 05' 19.1" P.A. 99 sep 5 mag 6.71,9.42 Sp A5V+K2III dist. 763.36 pc (2490.08 l.y.)

V1466 Aql = 19523+1021AB 8" 205x: Nice white star with faint but steadily seen wide B. Nice pair

A 1660 AB-C: 8" 333x: Too tough for this night. Suspect with 205x, @ 333x I have strong sense of elongation but its all a haze, seeing not allow higher magnification. [AB is 0.2"! Very much worth trying with the 20" HD 354044
19h 52m 53.17s +14° 25' 07.7" P.A. 203 sep 0.7 mag 10.24,10.32 Sp F2

A 1663 AB: 8" 333x: Clean split, equal, can see disks with seeing. best seeing of the night
19h 57m 34.28s +15° 24' 21.5" P.A. 237 sep 1.3 mag 8.89,9.25 Sp F5

STF 2644 AB: 8" 333x: Close white stars, near equal, ~2.5"
20h 12m 35.09s +00° 52' 00.2" P.A. 206 sep 2.6 mag 6.92,7.06 Sp B9p dist. 180.51 pc (588.82 l.y.)

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