Thursday, January 3, 2019

perseus doubles

Had a clear-ish night last night, so chased down doubles in Perseus.  Transparency was poor -- in fact, a large cloud was slowly moving out of the area when I began -- and seeing a variable from 6-7/10.  Still good enough to make a night of it.  Strangely no dew formed, but it was quite cold and I wish I dressed more warmly.  All with Big Blue at 557x

A 2906: This is the brighter of the STF 314 pair; I have a feeling it is slightly elongated but nothing certain.  STF 314 itself is a nice half delta mag pair ~3".
02H 52M 52.03S +52° 59' 50.6" P.A. 120 SEP 0.2 MAG 7.26,8.78 SP B8III DIST. 307.69 PC (1003.68 L.Y.)
02H 52M 52.03S +52° 59' 50.6" P.A. 315 SEP 1.6 MAG 6.95,7.26 SP B8III DIST. 307.69 PC (1003.68 L.Y.)

A 1279: Can just see the star in the finder.  In the scope it is a hazy elongated smear which resolves to two equal points with seeing.  2".  Very nice!
02H 40M 25.95S +55° 18' 33.4" P.A. 306 SEP 2.2 MAG 10.12,10.12 SP A0

STF 297: Arc of three stars, each a different mag and color (blue-white, reddish, and the faintest bluish).  I believe the brightest, in the middle, the reddish one, is the 0.9" pair, but I can't see any split.  [Something may be incorrect in the Carro listing or in my finder chart as there are three stars in the set with the PAs in an arc, but nothing at 0.9"]
02H 45M 24.74S +56° 33' 49.3" P.A. 279 SEP 15.8 MAG 8.55,8.87 SP A0V DIST. 193.42 PC (630.94 L.Y.)

BU 1314: Orange star, but faint pair not seen due to haze. [Six stars in the system most too faint]
02H 31M 53.38S +57° 41' 51.5" P.A. 123 SEP 4 MAG 6.98,12.90 SP B6IA DIST. 8333.33 PC (27183.32 L.Y.)

HLD 7: Challenging due to the haze but no doubt, a 3 delta mag pair in the diffraction, 1.5"
02H 25M 25.96S +58° 12' 09.3" P.A. 182 SEP 1.7 MAG 7.98,9.86 SP A3V DIST. 150.38 PC (490.54 L.Y.)

STF 230: I see a wide split pair but my finder chart says it should be 1.9"? [Finder is wrong]
02H 14M 57.07S +58° 29' 26.0" P.A. 259 SEP 23.8 MAG 7.87,9.37 SP B8III

BLL 7: Wide near equal pair; wonder how they know it's binary? [FWIW WDS says nature of the pair is uncertain.]
02H 22M 51.72S +58° 35' 11.5" P.A. 21 SEP 69.3 MAG 10.76,11.39 SP M3IAEV DIST. 602.41 PC (1965.06 L.Y.)

Stock 2 in the finder; nice faint & loose but rich cluster.

7 Per = BU 1170: Near the Double Cluster.  Pretty orange-yellow star; B star is distant and faint -- how know binary?  The B star feels elongated with averted vision.  [BC is 11.50/11.70 0.3", not likely I saw it.]
02H 18M 04.58S +57° 30' 58.7" P.A. 358 SEP 68.7 MAG 6.11,12.29 SP G7III DIST. 251.26 PC (819.61 L.Y.)

5 Per = BU 874: A couple of faint stars as possibilities, but too distant than what my finder says it should be...
02H 11M 29.19S +57° 38' 44.0" P.A. 266 SEP 5.3 MAG 6.44,12.40 SP B5IA DIST. 1785.71 PC (5824.99 L.Y.)

9 Per = BU 875: Can't see the faint B for the haze.  A is a pretty yellow star.
02H 22M 21.43S +55° 50' 44.4" P.A. 175 SEP 12.3 MAG 5.24,12.00 SP A2IA DIST. 1000 PC (3262 L.Y.)

STF 235: A very close pair 2" near equal.  But not what my finder says it should be? [Finder likely incorrect, based on the data I did see the pair]
02H 17M 10.70S +55° 54' 53.9" P.A. 49 SEP 1.9 MAG 9.60,9.81 SP F8

BU 1373: B too faint to see.
02H 23M 51.75S +55° 21' 53.5" P.A. 130 SEP 10.9 MAG 6.29,14.60 SP F7IB DIST. 934.58 PC (3048.6 L.Y.)

STF 268: Yellow-orange star making an arc with two others.  [Is only a double.  Did not see since the separation is fairly close, closer than the sketch I made.]
02H 29M 24.96S +55° 32' 10.5" P.A. 130 SEP 2.8 MAG 6.72,8.50 SP A2PSHELL DIST. 162.87 PC (531.28 L.Y.)

STF 270: Nice orange star with wide B [5 stars in the system but others too faint to see]
02H 30M 50.65S +55° 32' 54.2" P.A. 306 SEP 21.3 MAG 7.00,9.66 SP F4V DIST. 54.7 PC (178.43 L.Y.)

ALI 765: No go.  There's a correct mag star in the field but it's too far out.
03H 00M 05.70S +39° 11' 24.9" P.A. 11 SEP 12.2 MAG 9.63,11.99 SP A3V DIST. 420.17 PC (1370.59 L.Y.)

STT 44: !! In M34 open cluster!  Close near equal pair, 1.5", very nice!  The cluster is pretty, loose, and jangly with stars of varying magnitudes.  What a treat.
02H 42M 13.13S +42° 41' 57.2" P.A. 55 SEP 1.4 MAG 8.46,8.96 SP B9VP DIST. 248.14 PC (809.43 L.Y.)

20 Per = STF 318 & BU 524: Wide 2 delta mag; no sign of elongation of BU
02H 53M 42.58S +38° 20' 15.6" P.A. 237 SEP 14 MAG 5.39,9.68 SP F4IV DIST. 70.67 PC (230.53 L.Y.)
02H 53M 42.58S +38° 20' 15.6" P.A. 277 SEP 0.19 MAG 5.79,6.80 SP F4IV DIST. 70.67 PC (230.53 L.Y.)

STF 316: Wide near equal
02H 52M 05.13S +37° 17' 45.7" P.A. 136 SEP 14.2 MAG 9.46,9.74 SP F8

I spent the rest of the night, for about 15 minutes, looking at M42.  It was remarkably textured and showed green and rose colors.  I used 86x and 170x, just enjoying the view.  Only 5 stars showed in the Trapezium; transparency was ok but seeing not as good.

And this morning I noted the much thinner moon, very bright Venus, and another bright object near the moon -- which I found out later is Jupiter.  Sky very clear and calm, I wish I had a telescope out.  It is to be cloudy and rainy for the next week, sadly.

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