Tuesday, July 25, 2017

data dump

These are the observations from four nights of observing from home between 7/16-21 with the 12.5-inch.  A bit of a data dump.  Generally seeing was average to begin with at 9pm, and didn't settle out until after 10pm, but I didn't have much time since I always needed to turn in by 11pm.  I made an outward blowing rear fan, to see if this helps the thermal plumes from the mirror (as opposed to the sideways blowing boundary layer fan I had been using).  I could not really tell a difference yet, given the seeing.

Saturn, 17h27m01.9s,-21°55'28",Oph,0.2,26°,S: 6/10; T: 3/5., 8mm, 276x   Best at 277x.  I can see four moons, but also stars in the field.  Titan, Tethys, Dione, Rhea.  Cassini division easy; dull tri-colored globe.  In the finderscope, above Saturn, there are two orange carbon stars, and maybe two more beyond."

HIP 69140, Multiple Star System, 14h10m03.1s,+07°18'27",Vir,10.0,56°,S: 6/10; T: 3/5.,8mm X2.0, 552x  STT 275.  Orange star with very faint B, 3-4 delta mag, wide ~10".  Nice!  14H 09M 11.21S +07° 23' 05.8" P.A. 354 SEP 5 MAG 7.3,10.09 SP G9III DIST. 180.51 PC (588.82 L.Y.)"

HR 5385, Multiple Star System, 14h24m14.1s,+08°22'11",Boo,6.7,58°,S: 6/10; T: 3/5.,8mm, 276x.  STF 1835.  In a line of three stars, white and slightly red B.  Wide, ~6", 2 delta mag.   [A,BC seen.  BC is near equal 0.3" and would make a good challenge for the 20-inch!] 14H 23M 22.74S +08° 26' 47.9" P.A. 195 SEP 6 MAG 5.03,6.78 SP A0V+F2V DIST. 65.92 PC (215.03 L.Y.)"

HIP 72221,Multiple Star System, 14h47m06.9s,+09°34'36",Boo,7.4,61°,S: 6/10; T: 3/5.,8mm X2.0, 552x  STF 1879.  Fairly close yellow and orange-yellow, ~1 delta mag, ~3"  [AB seen.  AB,C and AB,D too far separations]  14H 46M 15.58S +09° 38' 48.2" P.A. 82.7 SEP 1.72 MAG 7.79,8.45 SP G2V DIST. 43.22 PC (140.98 L.Y.)"

HIP 71946,Multiple Star System, 14h43m46.4s,+08°00'19",Boo,9.9,59°,S: 6/10; T: 3/5.,8mm X2.0, 552x  STF 1870.  Yellow and fairly faint blue B, ~5-6", 3 delta mag. 14H 42M 55.10S +08° 04' 34.3" P.A. 231 SEP 4.8 MAG 7.46,9.98 SP F2 DIST. 198.02 PC (645.94 L.Y.)"

HIP 72634,Multiple Star System, 14h51m52.8s,+09°39'18",Boo,9.6,61°,S: 6/10; T: 3/5.,8mm X2.0, 552x  STF 1886.  Yellow-orange and orange, pretty wide ~10" 2 delta mag [Four stars visible, the others a little too faint] 14H 51M 02.31S +09° 43' 25.2" P.A. 225 SEP 7.4 MAG 7.61,9.73 SP K0 DIST. 29.44 PC (96.03 L.Y.)"

HIP 69062,Multiple Star System, 14h08m56.8s,+36°40'23",Boo,10.6,73°,S: 6/10; T: 3/5.,8mm X2.0, 552x  STT 276.  Seeing not really good enough to see elongation or rod in the orangish A -- but once I read it is a 0.5" pair, I look for it and think I see it.  AB,C also seen, 1 delta mag, ~5" 14H 08M 11.84S +36° 44' 56.6" P.A. 207 SEP 0.4 MAG 8.93,9.43 SP G4III DIST. 201.21 PC (656.35 L.Y.)"

HD 129260,Multiple Star System, 14h41m28.6s,+31°13'15",Boo,7.8,77°,S: 6/10; T: 3/5.,8mm X2.0, 552x  STF 1867.  0.5 delta mag, hair to figure 8 split, white.   [0.7", not bad considering the seeing] 14H 40M 44.21S +31° 17' 23.5" P.A. 353 SEP 0.65 MAG 8.36,8.83 SP F5 DIST. 116.96 PC (381.52 L.Y.)"

HIP 71193,Multiple Star System, 14h34m19.4s,+35°30'59",Boo,8.7,78°,S: 6/10; T: 3/5.,8mm X2.0, 552x  STF 1858.  Near equal orange 3-4", 13th magnitude a wide pair?  See with averted vision, comes and goes with seeing, PA at a right angle to AB.  [AB seen, and the 3rd is AC.  AD not seen.] 14H 33M 36.45S +35° 35' 08.0" P.A. 37.9 SEP 3.03 MAG 8.13,8.98 SP G5 DIST. 36.79 PC (120.01 L.Y.)  "

STF1883B,Multiple Star System, 14h49m45.4s,+05°53'08",Vir,8.9,57°,S: 6/10; T: 3/5.,8mm X2.0, 552x  STF 1883.  Strongly suspect a split / elongation in 80mm finder.  It is a tight 2 delta mag orangish-white pair, 1" [amazing to notice the elongation in the finder!]  14H 48M 53.22S +05° 57' 15.9" P.A. 277.2 SEP 1.02 MAG 7.02,8.95 SP F6V DIST. 55.59 PC (181.33 L.Y.)"

HIP 72846, Multiple Star System, 14h54m12.6s,+15°38'19",Boo,6.5,56°,S: 6-7/10; T: 3/5. , 8mm X2.0, 552x  STT 288: Notched / figure 8 with 8mm, split with barlow.  Clean split despite seeing not very good, 6/10. 14H 53M 23.35S +15° 42' 18.3" P.A. 157.5 SEP 0.99 MAG 6.89,7.55 SP F9V DIST. 47.64 PC (155.4 L.Y.)"

Xi Boo, Multiple Star System, 14h52m11.8s,+19°02'01",Boo,4.6,58°,S: 6-7/10; T: 3/5. ,8mm, 276x  STF 1888: Pretty yellow & orange pair, 2 delta mag, ~8".  [AB seen; 6 stars visible in system]  14H 51M 23.38S +19° 06' 01.7" P.A. 300.5 SEP 5.47 MAG 4.76,6.95 SP G8V+K5V DIST. 6.71 PC (21.89 L.Y.)"

SAO 101438,Multiple Star System, 15h13m30.8s,+19°14'01",Ser,7.7,61°,S: 6-7/10; T: 3/5. ,8mm X2.0, 552x  STF 1919: Very wide yellow and orange-yellow.  In an arc of three stars, with nice orange carbon star at the other end.   15H 12M 43.48S +19° 17' 09.8" P.A. 11 SEP 23.2 MAG 6.71,7.38 SP G1V+G5V DIST. 27.24 PC (88.86 L.Y.)"

HR 5640, Multiple Star System, 15h09m21.4s,+25°02'52",Boo,5.8,64°,S: 6-7/10; T: 3/5. ,8mm X2.0, 552x  HJ 2766.  Orange-yellow A with very wide, very faint B, ~ 4 delta mag.    15H 08M 35.56S +25° 06' 31.1" P.A. 331 SEP 57.6 MAG 5.8,12.2 SP K1III DIST. 143.06 PC (466.66 L.Y.)"

HIP 74893,Multiple Star System, 15h19m05.2s,+26°46'59",CrB,6.7,66°,S: 6-7/10; T: 3/5. ,8mm X2.0, 552x  STF 1932.  Near equal yellow-white, very close but clean split, ~1.5".  Nice! [AB seen] 15H 18M 20.19S +26° 50' 24.7" P.A. 266 SEP 1.62 MAG 7.32,7.41 SP F6V+F6V DIST. 35.98 PC (117.37 L.Y.)  "

SAO 64575,Multiple Star System, 15h14m52.7s,+31°41'55",Boo,9.2,66°,S: 6-7/10; T: 3/5. ,8mm X2.0, 552x  STT 292.  Is it triple?  Orange star with two possible wide pairs.    [double only, just pick one of the stars and that's B!] 15H 14M 06.04S +31° 47' 16.2" P.A. 158 SEP 118.2 MAG 6.16,9.36 SP K5 DIST. 203.25 PC (663 L.Y.)"

SAO 64591,Multiple Star System, 15h16m20.8s,+33°15'44",Boo,7.8,65°,S: 6-7/10; T: 3/5. ,8mm X2.0, 552x   STFA 27: Split in 80mm finder.  Very wide pair, very bright A, 3 delta mag B.  Orange-yellow and blue-white B [There is an AC pair 14th mag very wide] 15H 15M 30.16S +33° 18' 53.4" P.A. 78 SEP 106.3 MAG 3.56,7.89 SP G8IIICN-1 DIST. 37.34 PC (121.8 L.Y.)"

Mu 2 Boo, Multiple Star System, 15h25m10.8s,+37°17'34",Boo,6.9,68°,S: 6-7/10; T: 3/5. ,8mm X2.0, 552x  STFA 28.  Orange star with very wide, much fainter B, 3 delta mag. [I need to revisit, as STF 1938 is the Ba,Bb pair with near equal 2.2"] 15H 24M 30.89S +37° 20' 52.5" P.A. 3.6 SEP 2.25 MAG 7.09,7.63 SP G0V DIST. 36.06 PC (117.63 L.Y.)"

S  Boo,Variable Star, 14h23m27.7s,+53°44'17",Boo,10.8,58°,S: 6-7/10; T: 3/5. ,8mm X2.0, 552x  S Boo.  Rich orange color, ~8th mag. [actually 9.8, it's variable]"

ENG  52B, Multiple Star System, 15h08m09.1s,+24°49'45",Boo,13.5,63°,S: 6-7/10; T: 3/5. ,8mm X2.0, 552x  ENG 52: Bright white-yellow A, very faint 4-5 delta mag B, bluish, very wide separation.   [AB seen.  There's a AC wide sep. and a BC, also a wide sep -- very awkward movements, it must all pull and push against each other] 15H 07M 18.06S +24° 52' 09.1" P.A. 40 SEP 103.5 MAG 4.97,11.53 SP F5V DIST. 19.55 PC (63.77 L.Y.)"

HJ 2777B,Multiple Star System, 15h23m09.7s,+25°34'44",CrB,13.6,66°,S: 6-7/10; T: 3/5. ,8mm X2.0, 552x   HJ 2777 = UV CrB: Light orange with very faint blue B, very wide 3 delta mag. [Not a physical pair] 15H 22M 25.32S +25° 37' 27.0" P.A. 342 SEP 42.5 MAG 7.39,12.11 SP K1III DIST. 467.29 PC (1524.3 L.Y.) "

STF1937C, Multiple Star System, 15h23m55.5s,+30°15'08",CrB,12.6,68°,S: 6-7/10; T: 3/5. ,8mm X2.0, 552x  STF 1937.  Overlapping / notched orange-yellow stars.  Used apodising mask.   [Not bad!  AB seen, first 0.5" pair from home!  There are total 6 stars in the system.] 15H 23M 12.23S +30° 17' 17.7" P.A. 224.6 SEP 0.53 MAG 5.64,5.95 SP F8V+G0V DIST. 17.86 PC (58.26 L.Y.)"

Saturn, 17h26m19.2s,-21°55'22",Oph,0.2,30°,S: 6/10; T: 3/5,8mm, 276x  Looking very nice.   Spotted Tethys above Saturn in the view.  Moons Titian, Rhea, Enceladus, and Dione were in a nearly straight diagonal line running from the far left to below the planet in the view.  Seeing not very good, but could make out Enke Division and colored bands from time to time."

PPM 131591,Multiple Star System, 15h40m59.3s,+12°00'03",Ser,10.0,63°,S: 6/10; T: 3/5,8mm X2.0, 552x  STT 300.  Orange-yellow with wide separation bluish B, 3 delta mag.    [15H 40M 10.35S +12° 03' 10.6" P.A. 261 SEP 15 MAG 6.32,10.07 SP G7.5IIIA DIST. 286.53 PC (934.66 L.Y.)]"

HD 142910,Multiple Star System, 15h57m35.1s,+12°25'57",Ser,7.7,64°,S: 6/10; T: 3/5,8mm X2.0, 552x  STF 1988.  Near equal yellow-white pair, ~2".  15H 56M 45.53S +12° 28' 40.6" P.A. 249 SEP 1.9 MAG 7.59,7.84 SP F1V DIST. 96.25 PC (313.97 L.Y.)"

HIP 78446,Multiple Star System, 16h01m43.5s,+13°13'38",Ser,7.2,65°,S: 6/10; T: 3/5,8mm X2.0, 552x  STT 303.  Near equal white, ~1.5".  Nice!  16H 00M 54.16S +13° 16' 18.2" P.A. 173.9 SEP 1.6 MAG 7.69,8.06 SP F7V DIST. 97.28 PC (317.33 L.Y.)"

BD +13 03066,Multiple Star System, 16h06m59.8s,+13°14'45",Ser,10.8,65°,S: 6/10; T: 3/5,8mm X2.0, 552x  STF 2007.  Split in finder.  Two yellow stars, 2 delta mag, wide. [AB seen; AC has very wide separation] 16H 06M 02.82S +13° 19' 15.5" P.A. 324 SEP 39 MAG 6.89,7.98 SP G8III DIST. 222.72 PC (726.51 L.Y.)"

HD 145958,Multiple Star System, 16h14m07.8s,+13°29'12",Her,6.7,66°,S: 6/10; T: 3/5,8mm X2.0, 552x  STF 2021.  Equal yellow-white stars, ~4".   AB seen.  AC very wide separation. 16H 13M 18.45S +13° 31' 37.2" P.A. 357.1 SEP 4.06 MAG 7.43,7.48 SP G9V DIST. 23.58 PC (76.92 L.Y.)"

Gamma CrB, Multiple Star System, 15h43m28.9s,+26°14'47",CrB,3.8,77°,S: 6/10; T: 3/5,8mm, 276x  STF 1967.  Tried but failed to split, seeing too poor in the beginning of the night.  [Though, seeing the separation is only 0.36", I suppose I should not have been disappointed!  Discovered at 0.7", near maximum elongation -- period of 91 years so it's pretty fast.]  15H 42M 44.57S +26° 17' 44.3" P.A. 108.1 SEP 0.36 MAG 4.04,5.6 SP B9V+A3V DIST. 44.78 PC (146.07 L.Y.)  "

STT 302B,Multiple Star System, 15h55m39.1s,+34°19'23",CrB,10.1,84°,S: 6/10; T: 3/5,8mm X2.0, 552x   STT 302.  Nice orange but maybe elongated a little?  [Not seen; this is a wide separation] 15H 54M 56.85S +34° 21' 45.0" P.A. 51 SEP 28.8 MAG 7.16,10.42 SP A3V DIST. 183.82 PC (599.62 L.Y.) "

PPM 78977,Multiple Star System, 16h01m51.5s,+33°17'07",CrB,10.4,85°,S: 6/10; T: 3/5,8mm X2.0, 552x  S 676  Tried but failed to split.  Suspected elongation. [This one fooled me; it's a very wide separation] 16H 01M 02.65S +33° 18' 12.6" P.A. 47 SEP 141.7 MAG 5.47,10.51 SP G2V DIST. 17.24 PC (56.24 L.Y.)  "

STF1970C,Multiple Star System, 15h46m52.9s,+15°19'29",Ser,13.4,67°,S: 6/10; T: 3/5,8mm, 276x  STF 1970.  Very wide separation, white A and bluish B.  B looks like a planet reflecting light.  3 delta mag.    [Delta mag is actually 6!] 15H 46M 11.21S +15° 25' 18.9" P.A. 264 SEP 30 MAG 3.66,9.96 SP A2IV DIST. 47.55 PC (155.11 L.Y.)"

STF2431B,Multiple Star System, 18h59m21.2s,+40°42'17",Lyr,9.6,59°,S: 7/10; T: 3.5,8mm, 276x   V543 Lyr = STF 2431  Easy wide yellow-white & bluish pair.   [18H 58M 46.59S +40° 40' 45.1" P.A. 236 SEP 19 MAG 6.17,9.61 SP B3V DIST. 300.3 PC (979.58 L.Y.)]  Short night because the neighbors were having a party; I planned to go to Pinnacles next night anyway and need to turn in early for the sleep

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