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RA: 20h 01m 47.75s
Dec: +33° 31′ 38.2″
Ch: MSA:1149, U2:119, SA:9
Type: bright nebula (HII region)
Mag: B=?, V=?
Synonyms: H III-144
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "Some extremely small stars, with nebulosity irregularly extended, verified with 240 power."
The RNGC (Sulentic and Tifft 1973) notes that this is a planetary nebula.
Photo Index by Jim Lucyk: Vehrenberg's Atlas of Galactic Neb-2 p71.
PK: virreg w/f (?) on NE, br on SW (lobe elong in pa120).
15cm - mod f, vis easily @ 50x. gradual contrast improvement going from DS to
[OIII] filter. 140x: 30" across but not circ. fan-shaped w/sharply-
defined edge on NE, fanning broadly SW. m13 `cen *' nr NE border. m11.5
* at W edge; m14.5 * in SW side of neb. two more *s close on SSE & NE.
BS, 15Oct1990, Anderson Mesa.
25cm - found @ 90x. 180x & 240x show it boxed in among four *s in lousy square.
on SW is m12 *, NE is m13, SE is m14.5, NW is m12.5. the neb is circ
w/m14 cen *. neb fades at edges.
30cm - smlr than -94, but different in character. perhaps elong, but mess of
assoc *s confuses. 40" diam w/vsl concen. edges fades like gx, but I
have gxs on the brain though. CBL, Roof.
The Messier objects
The Bennett objects
The Caldwell list
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