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RA: 21h 13m 45.88s
Dec: +13° 34′ 29.1″
Ch: MSA:1239, U2:210, SA:16
Type: galaxy (in pair), Sb
Mag: B=13, V=?
Size: 2.187′ x 1.862′
NGC 7042. See NGC 7043.
Synonyms: H III-209
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "vF, S, R."
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads S,R,HISB,VNARMS.
[amastro] November 5, 1999 Observing Notes
Location: Anderson Mesa, Flagstaff Arizona, USA.
Scope: 10-inch, f/4.5 equatorial mount Newtonian, 8.8 mm UWA (129x) and 18.0 mm SWA w/ 2x Barlow (126x).
We enjoyed another gorgeous night along the Arizona section of the Colorado plateau last Friday. I was bach'ing it, what with my wife at a conference in Salt Lake City, and took advantage of the weather to get in a few hours hunting DSOs in Pegasus and Cetus.
This first group, mostly galaxies in Pegasus, is plotted on Uranometria charts 210. NGC 7042 is located in far-western Pegasus about five degrees WNW from the bright globular cluster M15. This 12.0 magnitude Sb galaxy was fairly conspicuous with a surface brightness of 13.1 magnitude. It covered a 1'.2 diameter area with a pair of 13th magnitude stars immediately to the east. I spent several minutes in an unsuccessful attempt to locate nearby NGC 7043, a magnitude 13.7 SBa galaxy.
After failing to detect NGCs 7033 and 7034, I headed off for the impressive globular, M15. The cluster presented a rich granular appearance all the way to the core and covered an area roughly 10' across. The central, more densely populated region appeared somewhat triangular due to a sharp drop off in density about two arcminutes southeast of the core.
Slewing about 3/4 degree to the west, I swept up NGC 7068. This 13.9 magnitude fuzzy definitely fell into the barely detectable category. However, my sketch matches perfectly with the charting of this 30" diameter oval in Megastar, including the magnitude 14.9 star at its northern edge. A stellaring at the core was also suspected. NGC 7068 has a relatively high 12.1 magnitude surface brightness.
Equally faint, 13.8 magnitude NGC 7066 was found just 1.5 degree north of NGC 7068. It was noticeably elongated along an east-west line appearing 30"x15" in size. A triangle of 11th magnitude stars marked the galaxy's location just east of the base. This galaxy's 13.7 magnitude surface brightness leads me to suspect my earlier failure at detecting NGCs 7033 and 7034 was due to either a lack of dark adaptation, the sky still being affected by the last rays of twilight or some combination of the two.
NGC 7094 was found after negative sightings of NGCs 7084, 7085 and 7101. What a welcome relief to actually find something. This 13.4 magnitude planetary nebula covers a 3' diameter patch in my sketch. Its 13.73 magnitude central star was visible under direct scrutiny. NGC 7094 resides two degrees ENE from M15.
The final objects in Pegasus are plotted on Uranometria 213. This chart maps the area around Alpha Pegasi. The first objects, NGCs 7463 and 7465 are clustered around an 8th magnitude GSC star one-degree northwest of Alpha Peg. NGC 7463 appeared as a single 13.2 magnitude elongation, oriented east-west, 120"x40" in dimension. NGC 7465, much brighter at magnitude 12.6, was seen just to the south. It displayed a stellar core surrounded by a 45"x10" nebulosity.
About half a degree to the northeast, I encountered NGC 7454. This relatively bright, 11.8 magnitude elliptical galaxy covered an oval 1'.5x1'.0 in size. Two GSC stars, magnitudes 10.6 and 13.3, sit on the northwest edge of the galaxy. My sketch shows NGC 7454 having a stellar core. Stellar cores are often not observed with ellipticals.
NGC 7468 was my last stop in Pegasus. This 13.7 magnitude elliptical covered a 60"x40" area half a degree northeast from NGC 7454. In fact, a very close pair of GSC stars, 11.3 and 9.8 magnitude, mark the halfway point in the slew between the two. No stellar core was observed with this galaxy.
Pegasus has moved west of the meridian by 9:30pm so I moved the hunt into Cetus. Uranometria chart 262 plots each of the remaining objects. My first stop was at NGC 244. This is a magnitude 12.9 spiral (peculiar?) according to the RC3. My sketch records it being elongated east-west over a 40"x10" patch of sky. A 10th magnitude GSC star stood immediately to the south.
The 12.6 magnitude spiral, IC 51, was found after an easy slew two degrees north. Its location is marked by a 15th magnitude GSC star that sits at the galaxy's eastern edge. IC 51 covered a 45"x30" area showing no visible detail. I bypassed NGCs 246 and 255, two objects I've observed in the past, in favor of fresh game. Also, my 8.8 mm UWA was beginning to fog each time I took an extended view. So I replaced this workhorse with an 18mm SWA mated to a 2x Barlow. This combination produces almost identical magnification and field as the UWA.
NGC 309 can be found three degrees west of Eta Ceti. This relatively large, bright 11.9 magnitude spiral galaxy covered a 1'.5 diameter oval. IC 1602 was not detected.
Next on the survey, NGC 341A, found 10' north of 7.4 magnitude SAO 129078. This is one faint galaxy. The "Deep Sky Field Guide to Uranometria" gives a total visual magnitude of 14.5. That's as deep as I've ever gone with the 10-inch. It was consistently visible with averted vision and a check of my sketch against a DSS image confirms a positive sighting. NGC 341A appears as a 40" diameter patch in my drawing.
Three bright galaxies, NGCs 273, 274 and 275, occupy the northwest corner of Uranometria chart 262. NGC 273 is a 12.9 magnitude spiral and was positioned about 10' northeast of a 10th magnitude GSC field star. It appeared elongated east-west covering a 30"x10" area. NGCs 274 and 275 were closely nestled about 10' southeast from the same field star. These 45" diameter patches sported stellar cores and were distinctly visible as separate objects. Their magnitudes are 11.8 and 12.5, respectively.
NGC 270 was found 1.5 degree to the south. This 12.1 magnitude spiral galaxy covered a 1' diameter area. NGC 298 is located a degree east of NGCs 273-275. At magnitude 12.7, this was another relatively bright galaxy. Nearby NGC 293 was not seen.
The final group of objects is clustered around 7.22 magnitude SAO 129088. NGCs 340, 345 and 349 range from 12.7 to 14.4 magnitude in brightness. NGC 340 is the faintest of the trio at magnitude 14.4. Its 40" diameter form was visible just inside the edge of my field of view about 15' east of SAO 129088. NGC 345, 12.7 magnitude in the RC3, was similar in size and shape, located 10' SSE from the reference star. Finally, 12.7 magnitude NGC 349 was seen 5' west of the star. Several other galaxies populate this field. No others were seen. This includes NGCs 342, 347 and 350.
I like to finish my observing sessions with a galaxy group, if possible. This seemed as good a time as any to call it a night. Gotta leave something for next time.
POSS: closer m13-13.5 * 1'.34 SE, at which gx points.
UGC: pa(140). -43 @ 5'.4 in pa56.
15cm - vf modlosfcbr gx @ 80x. 1'.5 diam, but occas brtr seems oval, elong
~SE-NW. broad concen to ill-def core that is occas knottily mottled.
BS, 13Jul989, Anderson Mesa.
- fairly f, vis @ 80x. 140x: diffuse nrly circ oval elong SE-NW twd Wrn of
two m13-13.5 *s SE. broad concen across wkly mottled glow. vf vsm core.
BS, 6Sep1989, Anderson Mesa.
The Messier objects
The Bennett objects
The Caldwell list
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