Sunday, June 23, 2019

more doubles

A good night and better seeing; 7/10 and 3/5 transparency.  I adjusted the Webster sling in hopes it would solve the astigmatism, but no go.  Rear fan still vibrating.  Stars seem more still without boundary layer fans.  Rings outside of focus, mess inside.   8" mask almost throughout.  Getting the hang of star hopping using the hand controller; a very useful skill.

STF 1723: 20" 205x: Light yellow and light orange, 1.5 delta mag, well split.
13h 08m 13.49s +38° 44' 20.2" P.A. 12 sep 6.4 mag 8.67,10.08 Sp G2IV-V dist. 73.05 pc (238.29 l.y.)
STF 1692 = Cor Caroli: 8" 205x: Cream white and light canary yellow.  Well separated, 2 delta mag.
12h 56m 01.67s +38° 19' 06.2" P.A. 229 sep 19.3 mag 2.85,5.52 Sp A0pSiEuHg dist. 35.2 pc (114.82 l.y.)

STT 261: 8" 205x: Light yellow-white equal pair, ~1.5".
13h 12m 02.02s +32° 05' 07.9" P.A. 338.3 sep 2.61 mag 7.40,7.64 Sp F6V dist. 72.52 pc (236.56 l.y.)

STF 1768: 8" 205x: Very tight pair, a little more than hairline split, ~2 delta mag.  8" 333x: white and dull blue, ~1", Nice!
13h 37m 27.70s +36° 17' 41.4" P.A. 93.9 sep 1.67 mag 4.98,6.95 Sp A7IV dist. 60.9 pc (198.66 l.y.)

STF 1769: 8" 333x: Wide separated blue stars, half delta mag.  2+1 system?  1 delta mag fainter star quite more widely separated. [Sextuple system; I missed the 1.6" AB, need to re-observe; saw the AC pair only -- the fainter star noticed may be part of the system.]
13h 38m 01.95s +39° 10' 41.0" P.A. 45 sep 1.6 mag 7.91,10.42 Sp G5 dist. 46 pc (150.05 l.y.)

S 634
: 8" 333x Pair of orange stars of equal magnitude widely separated at either end of the FOV.  There are two faint blue pairs closer in to one of these. [The orange and the blue are the pair; though it's a surprise since the two orange stars look identical, may have formed together?]
12h 11m 22.93s -16° 47' 27.1" P.A. 302 sep 4.7 mag 7.17,8.79 Sp G6V dist. 32.34 pc (105.49 l.y.)

Since I had covered this part of the sky the night before, I moved to someplace new: Libra

Hld 20: !! 8" 205x: Orange star but no companion.  20" 333x Seeing distorted but a much fainter orange star seen as a point outside the diffraction, 5-6"; very fine!  Put 8" on @ 333x and can't see the B star!
14h 45m 57.78s -15° 27' 34.4" P.A. 249 sep 4.7 mag 6.48,10.10 Sp K1III dist. 444.44 pc (1449.76 l.y.)

BU 106: 8" 333x: Close, 1.5-2", half to one delta mag, off-white stars. [AB seen; three additional pairs seen.]
14h 49m 19.09s -14° 08' 56.3" P.A. 6.8 sep 1.95 mag 5.61,6.62 Sp A1pSrCrEu dist. 72.94 pc (237.93 l.y.)
BU 119: 8" 667x: Too much power, too dim and seeing too choppy.  8" 333x perfect, clean and well split ~2" near equal, slightly orange. [AB]
15h 05m 31.91s -07° 00' 48.8" P.A. 273.9 sep 2.32 mag 8.09,8.76 Sp G0 dist. 47.6 pc (155.27 l.y.)

STF 3091: 8" 333x White with very much fainter wide blue B. [AB,E seen; missed AB 0.5"]
15h 16m 01.56s -04° 53' 52.3" P.A. 46 sep 41.3 mag 7.30,12.00 Sp F8V dist. 62.54 pc (204.01 l.y.)

STF 1899 8" 333x White with very much fainter wide blue B. 
15h 01m 35.34s -03° 09' 50.5" P.A. 67 sep 28.3 mag 6.69,10.15 Sp K2IV+K0V dist. 109.29 pc (356.5 l.y.)
BU 349: 20" 333x, B star easily seen despite diffraction.  Can only see with 8" 333x after first having seen it in the 20", and even then need averted vision to bring it out.
15h 08m 57.33s +01° 41' 21.4" P.A. 38 sep 3.3 mag 7.59,10.94 Sp F1V dist. 88.65 pc (289.18 l.y.)

BU 348AB: 8" 333x, suspect elongation.  8" 667x, definite elongation.  8" 447x, best/cleanest view, clearly elongated.  20" 667x & 447x, view is too messy
15h 01m 48.92s -00° 08' 24.9" P.A. 108 sep 0.5 mag 6.13,7.49 Sp M0.5IIb

Jupiter: 8" 447x & planetary filter: No purple festoons in equatorial band; replaced by a ochre colored mess.  Dark rust colored S tropical belt, and a thin line of a band in the southern zone.

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