sponsored by psychohistorian.org


Deep Sky Observer's Companion – the online database


Welcome, guest!

If you've already registered, please log in,

or register an observer profile for added functionality.


log in to manage your observing lists























Full database:

Entire DOCdb database of 18,816 objects.



NGC 6823 (15,854 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




finder chart

altitude today

altitude (year)


½°, , in DOCdb

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/yivumoo/public_html/show_object.php on line 167

show browsing

NGC 6823

NGC 6823, Cl Collinder 405, C 1941+231, Ocl 124.0, Ocl 124, COCD 465, VII 18, h 2049, GC 4512

RA: 19h 43m 10s
Dec: +23° 17′ 54″

Con: Vulpecula
Ch: MSA:1195, U2:162, SA:8

Ref: SIMBAD, Collinder (1931), DAML02, Archinal&Hynes (2003)

(reference key)

Type: open cluster, 13mn

Mag: B=7.71, V=7.1

Size: 6′
PA: ?

Historical observations

William Herschel (c.1784)

Synonyms: H VII-018

Discovered in 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "an extended cluster of irregularly scattered stars of various sizes, considerably rich."

Published comments

Trumpler, R.J. (1928)

(Lick Obs Bul, Vol 14, No. 420) gives the diameter as 7' and the class as 4 3 p.

Lynds, B.T. (1965)

(Astrophysical Journal Supplement, No 105, 1965) in her Catalogue of Bright Nebulae notes that this isolated nebula is moderately bright, more prominent on the red POSS plate and has a maximum size of 40' x 30'. It is a member of the Vulpecula OB 1 Association.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 10.0 mag cluster associated with nebulosity.

Raab, S. (1922)

Raab, S. (1922) A research on open clusters. Lund Medd. Astron. Obs. Ser. II, 28, 1.

Discussed, based of F-A plates.

Photo index

by Jim Lucyk: Deep Sky #11 Su85 p9, Deep Sky Monthly 9/80 p14, Deep Sky #23 Su88 p41.

Modern observations

Walter Scott Houston

Notes: "NGC 6823 offers little other than half a dozen stars of magnitude 9 and 10 over a 5' area. The eye is attracted by three conspicuous stars in a row that is less than 1' long."

Houston notes this cluster is about 12' diameter but "has half again as many stars as NGC 6830 [which has about 20.] A quick search through my records turned up several amateur observations of the cluster but no mention of the surrounding diffuse nebulosity..."

Tom Lorenzin

Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "10M; 5' diameter; 30-plus 11 thru 12M members; surrounded by faint nebulosity with the designation N6820 (20' diameter); small cluster N6830 (9M; 8' diameter) 1.5 degrees due E."

Brian Skiff

WDS: trapezium = ADS 12828 + Pourteau 4026/27/28: V=9.3,11.0,11.1,10.0

(going E to W), farthest are 18".4 apart, pa307. see Skiff article in Deep Sky


8cm - pretty well concen in center, but other *s scattered @ 20x. BS, 15Sep1982, Anderson Mesa.

15cm - diamond noted. 15 *s.

- general aspect sim to I4996 in Cyg at 50x, but surrounding fld not so dense and cl is lgr and has more brtr *s. 5' diam w/30 *s incl central trapezium. 165x shows trap well but only occas glimpses of other inv comps---just too faint for this aperture! BS, 26Mar1988, Anderson Mesa.

- can just see f triangle *s nr Nrn * of trap @ 295x. also at least one * S of middle pair twd Srn *. BS, 5Sep1989, Anderson Mesa.

25cm - 5' diam, 35 *s. diamond in center. br *s 10' S and 5' NW.

30cm - 30 *s m8-12. loose.

Contemporary observations

Magda Streicher

(no date)

Alldays (22.50S, 20.12E, 770m).

12-inch f/10 SCT (95x, 218x)

The petite cluster is round in shape and stringe towards the NW. The middle section seems tight with double stars. The soft cloud around it is seen with a 0111 filter, which the slightly more prominent nebulosity towards the south of the cluster.

2006 July 18


16-inch f/10 SCT (95x, 127x)

Conditions: Good

My notes indicate a most petite middle in the formation of the stars. The focus is a knot of four faint stars in the middle from where it works it way outwards more loosely and more so to the west. Knowing that it is surrounds by a nebula I use the 0111 nebula to see very faint nebulosity to the NE of the cluster.

Favourite lists

Lacaille's catalogue

The Messier objects

Dunlop's catalogue

The Bennett objects

The Caldwell list

Named DSOs

Object search

First search phrase


Second search phrase

Type of object to include:

open cluster
globular cluster
planetary nebula
bright nebula
dark nebula
galaxy cluster
asterism & stars

The Bug Report

DOCdb is still in beta-release.

Known issues, feature requests, and updates on bug fixes, are here:

> Bug Report


Found a bug? Have a comment or suggestion to improve DOCdb? Please let us know!

> Contact us


DOCdb is a free online resource that exists to promote deep sky observing.

You could help by sharing your observations, writing an article, digitizing and proof-reading historical material, and more.

> Find out more

Everything on DOCdb.net is © 2004-2010 by Auke Slotegraaf, unless stated otherwise or if you can prove you have divine permission to use it. Before using material published here, please consult the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 License. Some material on DOCdb is copyright the individual authors. If in doubt, don't reproduce. And that goes for having children, too. Please note that the recommended browser for DOCdb is Firefox 3.x. You may also get good results with K-Meleon. Good luck if you're using IE. A successful experience with other browsers, including Opera and Safari, may vary.