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RA: 19h 31m 16.49s
Dec: +10° 03′ 21.9″
Ch: MSA:1244, U2:207, SA:16
Type: planetary nebula
Mag: B=12.7, V=15.2
This planetary nebula was discovered by Pickering, and is described in the NGC as "stellar."
The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag planetary nebula.
Hartung notes that "the image of this planetary is star like, showing a tiny disk only with high magnification. With two stars it forms an acute triangle 2' long."
Houston notes that he could not find this nebula using a 4-inch refractor while just sweeping the area. He adds that since its disc is only 5 arcseconds, it may not have been recognized as different from a star.
Steve Coe, using a 13" f/5.6, notes: "Pretty bright, very, very small and round at 200X. More power helps a little, but not much. The planetary has about a 3 arc second disk. This tiny disk demands a steady night and a very precise star chart."
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11M; 4" diameter! very small and tough; with 14M center star; planetary N6804 (13M; 1' diameter) 50' S and a little E; GOOD LUCK! if you can see both of these zombies with an 8-in. telescope, you're a real astronomer!."
15cm - ident @ 80x w/o filt, seems sl lgr than *. UHC enhancement strong, [OIII]
dramatic. 325x: prob 3" diam, cen * vis w/averted vis, m13.5-14 at 80x.
total m11.5 or so, or 0.3 mag fntr than * 2' N. BS, 30Jun1989, Anderson
25cm - m11.5, *ar. BS.
30cm - S of m11.2 *. 4"-5" diam. *ar center w/VERY sl outer halo. m13.5 * NNW.
16-inch f/10 SCT (127x 290x 462x)
In this busy star field the planetary pops out immediately. With the use of a 0111 (oxygen filter) it was obvious. No detail could be seen on the frosted dot.
Alldays (22.50S, 20.12E, 770m).
12-inch f/10 SCT (218x)
This nebula appears star like when I did see it at the end of day. With averted vision it come and go against a very busy faint star field. It looks somewhat around with a soft envelope.
Instrument:12-inch Dobsonian Reflector Telescope.
Sky Conditions:The fainter parts of the Milky Way are barely visible on the horizon.
Transparency of the Sky:Haziness only visible on the horizon.
Seeing:Atmosphere stable with little interference.
Object Type:Globular Cluster.
First Impression:This object looks like a globular cluster.
Chart Number:No.12(Extract taken out of "Atlas of the Night Sky").
Size:9mm Eyepiece:Field Of View:15'/8= 1.8'.
7mm Eyepiece:Field Of View:15'/7.5= 2.0'.
1.8'+ 2.0'= 3.8'.
3.8'+ 2= 1.9'.
Size in Arc Minutes:1.9'.
Planetary Nebula is 1.9'* 0.6'.
Brightness Profile:The nucleus of this planetary nebula is slightly brighter than the outskirts of it.
Challenge Rating:Very Difficult.
This planetary nebula is seen as a slightly oval pale green blur of light at both 167* and 214*.This nebula almost has a slight annular shape and is well defined.
The Messier objects
The Bennett objects
The Caldwell list
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