Saturday, November 18, 2017

some more in cygnus

It's been a poor observing season, with clouds and rain and generally poor conditions.  After a couple weeks there seemed to be a two day break, so I went back to the Carro Catalog to see where I should create more finder charts, and found I had yet prepared the north eastern quadrant of this huge constellation.  So armed with about thirty finders, I set about observing last night with Big Blue, 553x, T 4/5, but S only 6-7/10.

The second night, which was tonight, was a bust.  Earlier in the week I hopefully invited Steve and Mark to Willow Springs, but this morning it seemed there would only be a three hour window to observe, and this after four hours of darkness and waiting around in the cold.  So Steve decided not to go.  I was willing to go to Panoche Hills and in fact loaded up the car.  But I felt tired and I had a slightly sore throat, and fearing I would catch Clara's cold, decided it was best not to over tire myself.  It was a good thing: as I was unpacking the van I found I had forgotten to load my truss poles -- I would have driven the three hours to get there only to find I couldn't set up my scope.

BU 1210: Don't see AB (1.4" and 12th mag) too faint vs. the yellow-orange 7th mag A.  But I see several stars, including a very faint close pair which averted vision brightens.  After patiently waiting for seeing, I sense the AB star might be in a slightly off position angle as the two close faint stars? [STT 425 CD is 10.80/12.30 and 4.3" and might be the close pair; AC's PA is 27 degrees.  BU 1210 AB is 7.34/12.20, 1.4", PA 104 -- might be too much of a difference since it did not seem more than a 90 degree difference in PA.]
21H 00M 06.61S +48° 40' 45.9" P.A. 104 SEP 1.4 MAG 7.34,12.20 SP B9P DIST. 158.98 PC (518.59 L.Y.)

ES 32: 14th magnitude may be too faint, but some stars in the area.  [This is one for the 20-inch in a better sky.]
21H 06M 36.09S +47° 38' 54.3" P.A. 157 SEP 15.7 MAG 4.55,14.40 SP K3III DIST. 316.46 PC (1032.29 L.Y.)

ES 2710: I think I have it, very faint, need averted vision to notice but can hold direct vision.  Other star near.  Wide, 3-4 delta mag.
21H 24M 55.45S +49° 19' 23.4" P.A. 157 SEP 20.2 MAG 6.56,11.90 SP A0VPSR.. DIST. 184.84 PC (602.95 L.Y.)

ES 98: Three stars in an arc.  [In fact four stars visible.  AB, AC, BC seen; CD 14th mag not seen.  Not physical according to proper motion]
 21H 19M 24.47S +52° 19' 27.8" P.A. 309 SEP 25.9 MAG 7.31,10.16 SP B7V+A1I DIST. 231.48 PC (755.09 L.Y.)

A 1892: ! When seeing stills disk resolves with pin point <1" split, very fine.  1 delta mag.  Had to go to Mu Cephei to get the star hop correct, a confusing field.
21H 23M 40.12S +55° 17' 38.7" P.A. 351 SEP 0.8 MAG 8.17,9.31 SP A1V DIST. 361.01 PC (1177.61 L.Y.)

STF 2803: Three stars, 2 delta mag; wide.
21H 29M 52.95S +52° 56' 01.8" P.A. 285 SEP 25.7 MAG 7.24,9.60 SP B9.5IV-V DIST. 182.15 PC (594.17 L.Y.)

HJ 1669: 2 delta mag and such a rich field, who would guess which is double? [Not binary.]
21H 36M 09.75S +50° 30' 07.5" P.A. 236 SEP 19.6 MAG 7.16,11.60 SP A2V: DIST. 190.48 PC (621.35 L.Y.)

ES 825: Pretty orange and 2 delta mag wide B, but again, who would guess which is double in rich field? [Quadruple system]
21H 39M 55.58S +49° 07' 58.0" P.A. 257 SEP 12.2 MAG 7.25,11.50 SP K1II DIST. 483.09 PC (1575.84 L.Y.)

ES 35 = RU Cyg: Pretty red orange, 3 delta mag B, averted only.  Opposite side of an 11th mag star.  Wide. [11 star system]
21H 40M 39.10S +54° 19' 29.0" P.A. 218 SEP 10 MAG 8.19,12.40 SP M8E DIST. 249.38 PC (813.48 L.Y.)

STT 456: Close but clean = mag, 1.5".  Near several stars which make a mini Cygnus asterism, but with "Alberio" the brightest.  [12 fold system]
21H 55M 31.59S +52° 31' 40.7" P.A. 37 SEP 1.6 MAG 8.25,8.93 SP F2V DIST. 252.53 PC (823.75 L.Y.)

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