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RA: 23h 20m 14.68s
Dec: +08° 12′ 23.3″
Ch: MSA:1256, U2:214, SA:17
Type: galaxy (in cluster), E...
Mag: B=12.7, V=?
Size: 2.63′ x 2.187′
Synonyms: H II-439
Discovered in 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, pS, mbM."
A supernova erupted in this galaxy in 1970 (14.5p)
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads BE,R,BM.
Burbidge, E.M. & Burbidge, G.R. (1961) Recent investigations of groups and clusters of galaxies. Astron.J., 66(10), 541.
NGC 7619 Group
In this field sprinkled with stars are two bright, round galaxies, NGC 7619 and 7626. Clearly seen with a 6-inch, they are about 7' apart. The westernmost galaxy, NGC 7619, is about 1' across and rises much to the centre to a tiny starlike nucleus. The galaxy pair make a large cross with two 8th mag stars lying north and south.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.1M; 2' diameter; soft-edged blob with bright center; N7626 (11.2M; 2' diameter) 7' to E and a little N; celestial twins!."
Steve Coe, using a 13.1" f/5.6, notes: "NGC 7619 Pretty faint, pretty small, round and not brighter in the middle. This object is the center of the Peg I cluster and there are 5 other galaxies in a 30' field at 100X. All of the other galaxies are dimmer than NGC 7619 and are also round dots. There are another 6 galaxies within one degree of the central portion of the galaxy cluster. Several of them can only be seen with averted vision."
Steve Gottlieb notes: "17.5-inch: bright, elongated, bright core, stellar nucleus. This galaxy is the brightest and largest member of the Pegasus cluster along with N7626 6.9' E. Forms a close pair with N7617 2.8' SSW. N7626 lies 11.0' E. 8-inch: faint, small, small bright nucleus.
IAAC Observer: Lew Gramer, Site classification: rural; Limiting magnitude: 6.9 (zenith); Seeing: 6 of 10 - above average; 20" f/5 Tectron truss-tube dob Newtonian reflector: "Member of the Pegasus I group. Brightest of the entire field, n7619 is quite prominent in a low power view, nicely paired with its "twin" 10' W - n7626 (see below). It seemed fairly round, but with rapid, stepped brightening toward the middle. At least three different "steps" of brightness could be seen visually, in contrast to the burned-in photographic images of this massive galaxy. At 210x, it showed some elongation NW-SE, and mere glimpses of a nucleus were seen - better seeing may help."
POSS: pa40 +/- 5. * SE obs'd in 20cm not there or = N7617 2'.75 SW.
15cm - codominant gx in cl w/-26. hard to tell even @ 50x which is brtr: -19 has
consp *ar nuc while -26's is sub*ar. approx circ, 1' diam w/strong sharp
concen to m13.5 *ar nuc. vsmooth texture @ 140x. BS, 9Sep1989, Anderson
20cm - 1'x1' at 81x w/*ar nuc and a little halo. f * SE.
25cm - round, not too f. seeing gives impression of *ar nuc. 1'x1'.
30cm - quite br, found @ 149x. 238x: there is sub*ar nuc, 30" core, halo to 1'.
*ar nuc appears to be on E side of core. sl elong pa135.
- evenly concen but w/sharp *ar nuc. 1'.2x0'.8 in pa20; core circ, 30"
across. 5Sep1983, USNO.
I took a somewhat lengthy look at the Pegasus 1 galaxy group centered on NGC 7619 in my ten inch f/5.6 Newtonian under fairly decent skies last night. Three of these galaxies are on the Herschel II list I am currently suffering, er, I mean "working" on, but none were terribly difficult and I had previously logged some of them a few weeks earlier. According to my quick Megastar plot, I should have seen about 12 galaxies in the 49 arc minute field of my 14mm Meade Ultrawide, which I have nicknamed "The Glass Hand Grenade". The brightest galaxy is the Elliptical NGC 7619, which, along with its close neighbor to the east, NGC 7626, were the only two objects which were very obvious at low power. With the 14mm Glass Hand Grenade in, I easily noted a number of other small faint galaxies in the field, but to see all of those noted on my Megastar plot, I had to go to 141x to get the scale up. Both NGC 7619 and 7626 were not terribly large, but were quite easy. Each showed star-like nucleii in brighter cores surrounded by a nearly circular diffuse outer haze, although NGC 7626's core seemed a bit sharper.
Off the southwest edge of NGC 7619 was the diminutive but still fairly easy NGC 7617, appearing as a very tiny oval puff. Some distance to the north, I noted the small faint oval form of NGC 7623. Suprisingly, it was much easier to see than the edge-on spiral NGC 7631 which sits to the east of the two bright core ellipticals. Megastar lists both at 13.9, but I would have to say that NGC 7623 was a tad brighter than that and NGC 7631 was somewhat fainter. NGC 7631 was a tiny elongated streak which pointed towards a very faint star. I glimsed a very small galaxy southeast of NGC 7626 which was not on my original plot, but which I later identified as MAC 2321-0810A. Also visible was the tiny elongated patch of MCG +1-59-58. Farther to the southwest, UGC 12522 was questionable, and I am not sure that I wasn't just seeing a faint star, but what was confusing me was another somewhat easier slighly elongated galaxy to its immediate south. Megastar identified it as UGC 12518, which appeared to be elongated North-south. To the northest of these were a nice pair of highly tilted spirals, NGC 7611 and IC 5309. NGC 7611 was about the third or 4th easiest galaxy in the entire group, appearing as a small elongated fuzzy spot, while IC 5309 was somewhat fainter and had to compete with several faint stars next to it. The tiny oval forms of UGC 12510 and NGC 7608 were not terribly bright, but still were not overly hard to see. I also picked up NGC 7615 and 7612, but southeast of NGC 7612 was another tiny small and very faint spot of light. Going back to Megastar revealed that it may have been CGCG 406-69, although again, it might have just been a faint star enlarged by bad seeing. All in all, between 13 and 15 galaxies were seen in this interesting field. Looking at their radial velocity data in Megastar, it would appear that most of these objects are indeed part of some physical cluster. Looking a bit farther away with the computer picked up a few more galaxies in the area with similar radial velocities, so this group may be part of an extended cluster (anybody know what the boundaries are?). Clear skies to you.
David Knisely KA0CZC@alltel.net
The Messier objects
The Bennett objects
The Caldwell list
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