NGC 6822 (IC 4895, DDO 209) Galaxy in Sagittarius

Located at: RA 19 hours 44 minutes 57 seconds, Dec -14 degrees 48 minutes 11 seconds

Size: 15.6' x 13.5' Magnitude: 9.3 blue Class: IB(s)m

North is up

West to the right

Telescope:

14.5" f5 Newtonian reflector

Camera:

 ST-8XME, self-guided, binned 1x1, temp -15c & -20c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 790 minutes (79 x 10 minute subs), 09/21/22/23/24/25/2013; 3.4-5.2 FWHM per CCDStack

Processing:

CCDStack 2.75.4973.15338, Photoshop CS5.1

Location:

 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s

Notes: The seeing has been rather poor lately, as we are beginning to get in the season of "wind events" (Off-shore, or Santa Sana's). NGC 6822 is also known as "Barnard's galaxy".

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 6822
NGC 6822 = MCG -02-50-006 = DDO 209 = IC 4895 = Barnard's galaxy
19 44 58.3 -14 48 03
V = 08.8;  Size 15.5x13.5;  SB = 14.5;  PA = 5d

17.5": at 82x, this Local Group Member appears fairly faint, very large, low but 
uneven surface brightness, elongated 5:2 N-S, 14'x6'.  Diffuse appearance and 
the boundary is difficult to define, requires low power.  Several faint stars 
are superimposed with a couple of brighter stars on the N side.  Using an OIII 
filter two small, faint HII knots (Hubble X = IC 1308 and Hubble V) stand out 
well on the N and NW edges.  Both of these knots are 2' NW of mag 12 stars.  
Planetary nebula N6818 lies 40' NNW.

8": very faint, elongated N-S.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 6822
NGC 6822 = IC 4895, which also see.  The IC number is easily explained, but I
am a bit puzzled at the record concerning NGC 6822 itself.  William Sheehan, 
in his biography of Barnard "The Immortal Fire Within" has the galaxy being
"swept up with the 5-inch Byrne refractor in 1884".  However, in his short
note on its discovery in Sidereal Messenger, Barnard says that he used the
6-inch refractor to determine its position, and that it is in the same low-
power field (in the 6-inch) as the well-known planetary nebula, NGC 6814.  
Barnard is also a bit parsimonious with his description of the galaxy, calling 
it only "exceedingly faint".  There is nothing about its size or shape, so the 
NGC description "vF, L, E, dif" probably reached Dreyer in a letter.

This galaxy is important historically as it is the subject of Edwin Hubble's 
first published paper on Cepheids in external galaxies.  Though he announced 
the discovery of extragalactic Cepheids in M31 in 1924, he chose NGC 6822, "a 
remote stellar system", as the first to have his systematic studies reported 
in the Astrophysical Journal (Volume 62, page 409, 1925).  M33 and M31 
followed in 1926 and 1929, respectively.

Extragalactic astronomy begins here, too. - Dr. Harold G. Corwin, Jr.
=================================================================
IC 4895.
POSS. O-292.

Wolf.  19hr 42m 11.854s - 14 56' 44.039" (1950).
19hr 45m 01.601s - 14 49' 26.153" (2000).

This is equal to NGC 6822 (Barnard) :  Wolf describes it as "Group of neb. 25 
arcmin diam.", but it is actually the galaxy IC 6822 belonging to the Local Group.
I was unable to find any listing for the identity IC 4895 in the MOL.  The NGC 
2000, APL, Steinicke, NED, SIMBAD and PGC all equate IC 4895 with NGC 6822.
 - Malcolm J. Thomson