Author Topic: Legitimate Peak observations  (Read 255 times)


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Legitimate Peak observations
« on: June 28, 2017, 10:50:10 PM »
So, to prove I was doing more than just seeing weird things in the sky last Friday night, here’s some of the other observations.  I did mostly free-range observing, just picking an area of the sky and finding what I could from my chart.  Starting out with various DSOs around Vega:

MCG+6-41-6: Small, very faint, slightly elongated with an irregularly bright core. [14.6B, 0.667” x 0.560”, 370mly]

NGC 6685: Very faint, small, stellar nucleus, slightly elongated N-S.  With IC 4772 to the north, extremely faint, round and very small.

NGC 6675: Moderately large and bright, brightens with averted vision, especially the central part.  No distinct core or nucleus.  Oval with diffuse edges.  3-2 NW-SE.

NGC 6663: Very faint, irregularly bright, irregularly shaped oval patch.  Near STT 356.

NGC 6646: Moderately large, fairly bright, round-to-oval, brightens with averted vision.  IC 1288 to NE, small elongated 3:1 N-S, brighter in middle.

UGC 11228: Just stellar nucleus and very small faint oval halo [LINEAR type active galaxy nucleus. 14.5B, 1.013”x0.689, 265 mly]

NGC 6703 & 6702: 6703 is Brighter, with bright core and diffuse halo, mostly round -- spiral? in an arc of stars.  6701 is smaller, fainter, round, with a brighter core and elongated halo with averted vision.

NGC 6711: Fairly faint, need averted vision to notice it.  Small. Seems to have two brightenings in the diffuse oval halo SE-NW.  -- it's a face on spiral which accounts for the brightening -- these are the arms.

UGC 11376: Very faint, averted vision needed; small oval glow. [14.3B, 0.84”x0.386” 299 mly]

NGC 6742: PN.  Fairly uniform small smoke orb, a little brighter on the south side.  No central star.  A little better with OIII, 205x

NGC 6732-1 & -2: Two glows.  One to south (-1) is brighter and slightly elongated W-E; other is faint and very diffuse, no core.

Watson 2, open cluster: Seen as a small star clump in the 80mm finder.  In the scope it is a poor group a half a degree large.  Seems a double is in the middle of a group of stars forming a square and some others scattered, all similar brightness and no nebulosity.  Orange star makes the SW corner of the square.  Not listed in Archinal's Star Clusters book

STF 2368: Near equal white, close, ~1.5".  Hair split at 205x, clean at 333x.  To SSE is a faint green-blue star further south. P.A. 320 SEP 1.9 MAG 7.63,7.77

UGC 11292: Extremely faint small glow with star superimposed; oval very diffuse. [14.3B, 0.7” x 0.47”, 379 mly]

UGC 11202: Excessively faint glow, small oval with some stars involved. [14.4B, 1.103”x1.015”. 361 mly]

HU 674: Split with seeing at 333x, near equal white. (!! 0.47", my first double under 0.5" separation, woohoo!) P.A. 208.6 SEP 0.47 MAG 7.68,8.63

After a break I went to Gamma Cygni and have a look around, using the detail star chart in Interstellarum.  A number of very close pairs, and some exotic planetary nebulae.

STF 2606: Close pair 2 delta mag. 333x (!! AB 0.67") P.A. 146.6 SEP 0.67 MAG 7.74,8.43

KjPn 1: PN. Stellar, blinks strongly with OIII.   333x

KjPn 2: PN.  Nearly stellar, blinked with OIII as a bloated green star. 333x

KjPn 3: PN.  Stellar, green with OIII and blinks slowly, very small disk 333x

STF 2663: ~5" equal magnitude white [AB seen, there are 5 visible; P.A. 324 SEP 5.4 MAG 8.2,8.66].  There is another double to the south!!  A very beautiful & delicate pair, dull orange and dull yellow, 3 delta mag, ~3".   Frustratingly I can't find it in Aladin... Does not seem to be part of the STF system

Kro 76: Plotted as an open cluster, but is it just a double?  Orange and very faint 4 delta mag B, PA to the south, ~2-3", plus another extremely faint star due west about 6"

NGC 6874: Large open cluster, fills half degree field, generally triangular shaped, rather rich with a wide range of brightness.  Nice.

And then I came to STF 2609, and the weirdness set in…


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Re: Legitimate Peak observations
« Reply #1 on: June 29, 2017, 11:12:11 PM »
Fascinating list of pretty obscure summer targets!  The double to the south of STF 2606 is Ho 290, discovered by Herbert Howe in 1895 with the 20" Clark refractor at the Chamberlin Observatory in Denver.  The current separation is 3.5", which of course is quite easy, but the Delta is 3 mags.  Struve never observed it, but has the designation ADS 13628 (Aitken Double Star catalogue).

I've seen KjPn 1, but not 2 or 3 -- KjPn 2 is listed at V = 17.6 in SIMBAD, which is awfully faint, and I believe KjPn 3 is even fainter.  If you caught these, I'm pretty sure it would be the first visual observations!