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Type: planetary nebula
Mag: B=15.67, V=15.99
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A catalogue of H-II regions. Astrophys.J.Suppl.Ser., 4, 257-279.
Sh 2-274: "NGC 2237-NGC2238. Crescent shaped; similar to No.188."
Photo index by Jim Lucyk: Sky & Tel. 7/70 p25, Observer's Guide (Astro Cards) 11-12/88 p31
Steve Coe, observing with a 13" f/5.6, notes: "Faint, pretty large, elongated, irregular shape. Quite noticable at 100X with the UHC filter. It has a half moon shape with the southern end brighter and several stars involved. This is the object marked PK205+14.1 on U 2000 chart 184. It is called the Medusa Nebula in Sky Cat 2000. Anybody know why?"
15cm - vis @ 50x w/o filts as lg losfcbr patch in *ry fld. 10'x7' elong NNE- SSW. unconcen. roughly rectangular w/rounded corners, and seems indented on WNW-facing flank (see sketch in notes). m11.5-12 * just w/in border on NE. m10.5 * off SSE. sev m12-5.13 *s sup or nrby, but none close to center. DS filter gives wk enhancement, mod-strong w/UHC & [OIII], either would prob be effective in bringing it out from br light-polluted skies. 80x (no filts): 1'.5 WSW of m11 * nr NE edge are two m13.5 *s; one of these could be cen *---they're close to center. brtr * S is un= pair. U2000 symbol is for *ar obj, not vlg one. BS, 10Feb1991, Anderson Mesa.
Alldays (22.50S, 20.12E, 770m).
12-inch f/10 SCT (76x, 218x)
The crescent shaped nebula shape out to the east with the open area west. Filamentary structures accompanied by dark bays inside the brighter outer rim. Notice a tiny round and nearly stellar patch south of the nebula's centre. It was too distinct to be part of the nebula, it turns out to be a galaxy at [RA: 07h28m58s - DEC: +13o13'38"]
Location:Blesfontein Guest Farm,Sutherland.
Sky Conditions:The most crystal clear sky possible.Dark moon and stars magnitude 6 and fainter are visible with the naked eye.Excellent clean sky,limited star flickering and brilliant objects.
This planetary nebula is very large and that this nebula has an irregular appearance in the form of a crescent shape.This planetary nebula is a pale reddish colour and that this nebula is only visible in an OIII filter and that the surface brightness of this planetary nebula is extremely faint.This nebula can't be seen without an OIII filter.This planetary nebula measures 7.1'x5.4'.Chart No.211,NSOG Vol.1.
The Messier objects
The Bennett objects
The Caldwell list
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