Thursday 30 July 2015

#73 Cepheus Wonders Part 2: IC and Objects from other Catalogues

In the first entry of summarizing Cepheus I dealt with all 33 NGC objects.  This entry will deal with six IC objects, along with 21 from other catalogues.

IC Objects in Cepheus

I. 455:  1'.1 x 0'.7:  Vis. 13.3; SB 12.9:  Not far south following eg 2300, this oval galaxy was picked up at 125x and 150x.  It was seen best at 187x, but faint, and viewed decently only with averted vision.  It was very faint at 200x.
I. 469:  2'.2 x 0'.8:  Vis. 12.6; SB 13.1:  Picked off at 100x, it was very elongated.  Good views were enjoyed at 125x, 150x, and 187x.  The galaxy was large and ghostly in appearance, with a wider center and much narrower ends.  A remarkable object, and worth a visit.
http://cseligman.com/text/atlas/ic4a.htm

oc I. 1396:  90'; Vis 3.5; Br. * 3.8; 50 *s:  At 43x this is a fantastic cluster, and one of the largest, too!  Despite its enormous dimension, most stars are in the central area, surrounding Struve 2816.  Thus, at 60x the richest section is seen, along with the main triple star.
gn I. 1396:  170' x 140'; Emission:  Nebulosity was noted around the triple star, and around U, the showpiece variable star in Cepheus.  With a Skyglow filter it was also noted in a wide area, even and especially behond the cluster.  Worth many visits.  Photos tend to over-emphasize the cluster, which is not what is seen in the eyepiece.  The cluster is the main attraction for visual observers.
pn I 1454:  38"; Vis. mag. 14; Cent * mag. 18.8:  One of very few objects observed in Cepheus with my new, improved eye.  Large and pelasingly ghostly at 120x with the Skyglow filter, then seen without it.  The 8' aperture stop also showed it, even ghostlier!  A very faint star is on the north following edge.  This is a remarkable object, and viewable up to 200x.  150x with the filter shows it best.
http://cseligman.com/text/atlas/ic4a.htm

gn I 1470:  1'.2 x 0'.8; Emission:  Easily spotted at 60x, and bright using up to 375x.  It is seen well with the Skyglow filter, but it was also very good without it.  It was round, resembling a pn, and was involved with a noticeable star.
eg I 1502:  1'.2 x 0'.4:  Vis. 13.5; SB 12.6:  The galaxy appears to be involved with 2 faint stars.  Thus, it is tricky to discern, even at 200x.  Take this one as a challenge object.

Objects From Other Catalogues

oc Bergeron 1:  1'; 10 *s:  A tiny, hazy spot was noted at 60x, with 100x giving some resolution.  200x shows 6 stars in this tiny, compact cluster, one of the smallest I've ever seen.

oc Be 59:  10'; Br. * mag. 11; 40 *s:  Located at 60x, I first saw four bright stars with haze behind them.  100x resolves a tiny swarm of faint stars.  I observed up to 250x, where about 25 stars, somewhat scattered, were located.  Not a bad group in a 12" scope.
oc Be 92:  2'; Br. * mag. 15; 15 *s:  Located at 100x as a tiny, faint cloud.  Situated between two bright stars.  Only a few very faint stars are resolved at 250x.
oc Be 93:  4'.3; Br. * mag. 16; 120 *s:  Noted at 150x, some haze was seen behind dim foreground stars.  A few stars resolved at 200x.
oc Be 94:  3'; Vis. 8.7; Br. * mag. 13; 12 *s:  At 60x I saw 3 bright stars plus a small cloud of haze.  200x resolves 10 stars, mostly centered around 2 of the bright stars.
oc Be 95:  3'; 15 *s; Br. * mag. 15:  A small, hazy area was noticed at 60x.  100x resolves 3 or 4 stars with averted vision.  At 125x a short, faint line of stars was noted.  At 187x and 200x stars were continuing to resolve, but they were very faint.
oc Be 97:  2'; Br. * mag. 11; 12 *s:  Nothing seen at first, due to a fogged over secondary mirror.  After blow drying, 8 stars were counted at 187x and 200x, scattered around a 9.7 mag. double star.
oc Be 99:  5'; Br. * mag. 14; 60 *s:  Located at 100x, I saw a faint haze with a few resolved stars.  Up to 200x resolves about a dozen stars, some in a faint circlet.  It is adjacent to a bright field, with a brighter, opposing circlet. 
oc Be 100:  2'.7; Br. * mag. 16; 100 *s:  A haze was noted at 100x.  At 187x the cluster appears linear.  200x shows it well, with 3 stars resolved.  250x resolves 8 or 9 very faint stars.
oc Be 101:  6'; Br. * mag. 17; 50 *s:  I searched here using up to 250x.  Some haze was noted at 150x, with a 14 mag. star resolved between two brighter ones.  250x resolves two more.

oc Clvd B152:  25'; 15 *s:  This is a large, very loose scattering of faint stars.  There are two groups, one on either side of the central mag. 9 star and its 8.5 mag. companion, south.  The surrounding bright field, south, is more interesting than the cluster.  The bright double that precedes the cluster is stunning.

oc Cr 427:  4'; Mag. 13.8; 6 *s:  gn 7023 surrounds a 7.5 mag. star.  The cluster is one of the worst open clusters ever recorded here.  A few very faint stars were glimpsed just preceding the nebula.  Yawn.

oc Cz 42:  2'; 15 *s:  With a detailed location sketch I was able to locate this very faint object.  Seen at 100x, a few faint stars were glimpsed around a brighter one.  At 250x about 10 stars were resolved with averted vision, all very faint (15 mag.?).

oc King 10:  4'; Br. * mag. 11; 40 *s:  Located at 60x, near a mini Orion!  It is an oval group, showing 2 or 3 stars.  100x gives good views, while at 125x and 150x it became a nice linear group, well resolved.  At250x 25 stars were counted.  The cluster is rich and moderately dense.
oc King 11:  6'; Br. * mag. 17; 50 *s:  Some very faint haze was discovered, and 3 or 4 15-16 mag. stars were resolved, apparently not cluster members.
oc King 18:  5'; Br. * mag. 12; 20 *s:  Located at 60x, the little cluster shows intersecting lines of bright stars, with unresolved haze.  125x resolves many faint stars.  187x and 200x resolves 30 stars.  An interesting group.
oc King 19:  5'; Vis. mag. 9.2; Br. * mag. 12; 52 *s:  Located and easily noted at 60x and 100x, six bright stars are seen, with a large cloud of fainter ones resolving in the background.  Nicely resolved at 150x and 187x, 25 stars were counted.

oc Mrk 50:  2'; Mag. 8.5; Br. * mag. 9.8; 39 *s:  In the same low power field with oc 7510, and quite close to M52!  The main part of this small group is boomerang-shaped, with 12 stars in two converging lines.  The point of convergence is very dark.

oc PMH 791:  9'.3; Br. * 7.8; 21 *s:  The preceding edge is a double star, yellow and pale lilac in colour (CTF 2896: 7.8-8.6/22").  Two other stars are plotted on Uranometria, a 9 and 9.5.  About 20 stars are here, resolved at 60x and 100x.  A close faint triple star is in the north section.  The cluster is lovely at 125x.  An extended east/west base line of stars supports the main group, which has an arrowhead shape.

oc PWN 78.3:  3'; 180 *s:  This is a very faint cluster, with 10 stars resolving at 200x.     

eg UGC 2519:  1'.4 x 0'.8:  Vis. and SB mag. 13.6:  Not on my original "to do" list, I easily located the galaxy for fun while in the area.  It was oval, seen best with averted vision, was pretty faint but not that small.  Worth a stop if observing nearby eg 1184. 

Happy observing!
Mapman Mike
 

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