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 7762 (18,048 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

Warning: fopen(/home/yivumoo/public_html/logs/showobject/20200803.txt): failed to open stream: Disk quota exceeded in /home/yivumoo/public_html/show_object.php on line 168

Warning: fwrite() expects parameter 1 to be resource, boolean given in /home/yivumoo/public_html/show_object.php on line 181

Warning: fclose() expects parameter 1 to be resource, boolean given in /home/yivumoo/public_html/show_object.php on line 182

show browsing

NGC 7762

NGC 7762, Cl Melotte 244, Cl Collinder 457, Raab 151, C 2347+677, Ocl 280, VII 55, h 2272, GC 5016

RA: 23h 49m 48s
Dec: +68° 02′ 0″

Con: Cepheus
Ch: MSA:1057, U2:15, SA:3

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

(reference key)

Type: open cluster, 22m

Mag: B=?, V=11

Size: 14′
PA: ?

Historical observations

William Herschel (c.1784)

Synonyms: H VII-055

Discovered in 1788 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "a cluster of considerably small stars, iF, pretty rich and compressed, contains a vacancy in the middle." In the Philosophical Transactions, 1814, Herschel described it as "a pretty compressed cluster of very small stars; it is of an irregular figure, and has a vacancy in the middle. This appearance may be accounted for by supposing, for instance, three, four, or a greater number of preponderating attracting centres near each other, situated so as to inclose a certain space, the stars in which, then, cannot be accumulated, while the clustering power arising from the combined attractions will be exerted on the surrounding stars."

Published comments

Trumpler, R.J. (1928)

Trumpler (Lick Obs Bul, Vol 14, No. 420) gives the diameter as 11' and the class as 1 1 mU.

Sulentic & Tifft (1973)

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

Photo index

Photo Index by Jim Lucyk: Vehrenberg's Atlas of DS Splendors (3ed) p11.

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.

Melotte, P.J. (1915)

A catalogue of star clusters shown on Franklin-Adams chart plates. Mem.R.A.S., 60(5), 175-186.

Modern observations

Tom Lorenzin

Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11M; 15' diameter; 70-plus 12 thru 15M members; large and very, very faint; smaller, dimmer version of N7789 with about 1/10 the star count; bright star to SW is 5M SAO 20853; 1.5 degrees to ESE is cluster Ced-214."

Brian Skiff

15cm - lg mod f cl NE of m6 *. consp from general fld @ 50x as concen of f *s. 12' diam w/60 *s m12+. border irreg, but somewhat elong ~E-W. m7 * not far outside NE side; this is closer of two plotted on U2000 (where rel mags of the two are wrong). strong of 4-5 *s nr center. BS, 19Oct1992, Anderson Mesa.

25cm - lg, vf. on N side of br *. 20' diam w/20-30 *s res. gran bkgrnd haze.

30cm - really spread out for its size. 15' or so diam w/uneven sprinkling of *s m10.5+. *ism of 4-5 *s appears nebulous @ lox, but is res at hix.

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.

Warning: Unknown: open(/tmp/sess_e42277f46da1f675b0188995fb9ab92a, O_RDWR) failed: Disk quota exceeded (122) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct () in Unknown on line 0