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Type: planetary nebula
Mag: B=15.33, V=14.2
Burnham, S. W. () "Measures of planetary nebulae with the 36-inch equatorial of the Lick Observatory", Pub. Lick Obs., vol 2, p159-167. "This nebula was discovered by me in 1873 with the 6-inch refractor, with which it was also seen double or elongated. One of the nuclei is brighter than the other. ... They are not stars, but small enough for fairly accurate bisection [with a cross-hair]. This object does not properly belong to the planetary class of nebulae."
Photo Index by Jim Lucyk: Sky&Tel. 5/70 p301, Sky&Tel. 10/69 p227.
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag planetary nebula.
MacRobert writes that this is "a planetary nebula whose position is easily located near 63 Cygni .. My 6-inch shows two faint stars of 10th and 11th mag next to each other at 45x, but even at first glace something looks funny. The fainter one showed itself as a tiny fuzzball, while the other focused to a pinpoint. At 115x the nebula was easier and the sight beautiful - a dim, greenish gray ball next to a pale orange point. The higher the power the better; at 300x the nebula was showing definite hints of asymmetry. It appeared less than 20 arcseconds in diameter." Although it is catalogued at magnitude 12.7, MacRobert says it is much brighter visually.
(PK89+0.1) Mag=10.9. Cygnus: 21h, 6.3m; +47° 51' A most interesting object, also studied by Curtis, whose drawing after a photograph is included on p. 20 of Lawrence Aller's monograph on planetary nebulae, issued in 1971 by Sky Publishing. We did not find that it looked at all like the drawing, since we used a mere 8" scope in indifferent skies that suffered from some streetlight pollution. Yet, our notes recorded the comment "VERY INTERESTING LOOKING!", capitalized to indicate our very strong impression. The bi- nuclear detail (noted by Skiff & Luginbuhl) was observed at 422x, using a 2.5 mm eyepiece. The 27x11 arcsecond diameter nebula was discernible as a planetary with only 50x if an oxygen-line nebular filter was employed: a dark lane was just barely visible with 200x and the filter.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12M; 21" x 5" extent! elongated blob with 15M center star; 15' N and a little E of 5M 63 CYG."
Observer: Dave Mitsky; Your skills: Intermediate (some years); Date/time of observation: 1999/10/30 02:40 UT; Location of site: ASH Naylor Observatory, Lewisberry, PA (Lat 40.15 d; N, 76.9 d W, Elev 190 meters); Site classification: Exurban; Sky darkness: ~5.0 Limiting magnitude; Seeing: 6 1-10 Seeing Scale (10 best) Transparency: 4; Moon presence: None - moon not in sky; Instrument: 17" f/15 classical Cassegrain equatorial mount; Magnification: 118, 202, and 259x; Filter(s): Orion UltraBlock; Object(s): NGC 7026 (PK89+0.1); Category: Planetary nebula.
NGC 7026 is a bipolar planetary nebula located near Deneb. This object bears the nickname of the Cheeseburger Nebula. Earlier in the evening fellow ASH member Chris Fenn captured NGC 7026 with his 10" f/10 Meade LX 50 as part of his continuing program of observing planetary nebulae. After trying in vain to see SN 1999el in NGC 6951 I slewed the 17" f/15 classical Cassegrain to NGC 7026. NGC 7026 appeared as being somewhat rectangular in shape and was quite nice at all the magnifications that I employed. To the immediate northeast lies an 11th magnitude field star. An Orion UltraBlock nebula(r) filter enhanced the nebula slightly but I felt that an unfiltered 202x produced the most esthetic view.
NGC 7026 is certainly one of the brighter and more spectacular of my list of often overlooked PNe. When I first ran across this beauty with a 4" TV Genisis back in '94, I couldn't believe it when many of my fellow observers (with much larger instruments) didn't know what I was talking about! And with that single observation, so began my addiction to finding more and more such planetaries that made all of my "big-scope" buddies go, "Where the $#@! did you ever find that thing, and why haven't I ever seen or even heard of it?!?" As for N7026, I actually gave it the name "cheese-burger nebula" based upon high power observations that I made in 1994 with a 10" f/5 Cave at 264x. It very much so reminded me of a small, nebulous hamburger with two perfectly shaped "buns" seperated by a long thin dark lane (the meat ;-).
Of course, after much debate and family-fueding with another fellow Houstonian regarding the true nature of the term "hamburger nebula" and her infatuation with a certain "Gomez's hamburger" of somewhat similar nature, I decided to go with the term "cheese-burger nebula" ;-) Hmmm, I believe her initials are B.W. Anyway, I very rarely let a clear autumn observing session pass without checking out this object with Mira, my 16-incher. When seeing allows, powers over 400x prove to be quite rewarding with this particular nebula. Brightness variations can be seen within the buns, and even faint extensions can become apparent along the major axis. These features sort'a give the impression of two nebulous pancakes (instead of a ham/cheese burger) in a 36-incher at similar power. Man, I'm suddenly kind'a hungry now--anyway, wonderful observation of a wonderful PN, Dave...
Jay "the Kid" McNeil
POSS: * 26" from center in pa54, m10. pair 53" NW, m~13, pa~200.
8cm - *ar @ 20x. BS, 26Aug1983, Anderson Mesa.
15cm - fairly br & non*ar @ 80x. no [OIII] enhancement (!), mild w/UHC. m10.5 * 30" NE. neb 20" diam. 195x/295x: diffuse halo or collar in which are two *ar spots like m14 *s aligned in pa70-250. no cen * obvious: dk patch in center. modhisfcbr. [sketch in notes]. BS, 17Jun1991, Anderson Mesa.
18cm - Pluto camera guidescope, 180x: much smlr than N6826, 8" diam. br * on NE, threshold * 1'.5 NNW. neb see,s to wiggle w/seeing and there is exceedingly f *ing in center that seems to be exceedingly close dbl *. BS, 26Aug1983, Anderson Mesa.
25cm - 304x: next to m10.5 *. circ, 15" diam, m11. cen *-like point evident. diffuse edges.
30cm - 476x: br, elong N-S. bilobed w/sharp dk line btwn. on NE 1' is m8.5 *. on lobe nrst * is *ar manifestation on its outer edge. NW 1' is m12.5 *. elong by 40%.
[amastro] posting, Sat Nov 25, 2006
82" telescope, McDonald Observatory near Fort Davis, Texas, USA
f/13.7, 35mm Televue Panoptic (5' fov, 812x)
Rectangular shape with dust lane dividing it into 2 almost equal segments. Central star not noticed. This was none of the first objects viewed and I was too awed to look for much in the way of details.
The Messier objects
The Bennett objects
The Caldwell list
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