sponsored by psychohistorian.org

DOCdb

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.

List:

log in to manage your observing lists

 browse:

 

 position:

 

 next:

 

 options:

summary

rename

prune

trim

remove

close

copy

combine

plan

bookmark

load

new

delete

marathon

favourite!

Full database:

Entire DOCdb database of 18,816 objects.

 browse:

 position:

NGC 2259 (4,270 of 18,816)

 next:

oc gc pln bn dn gx gxcl ast aka lost

Object:

list

bookmark

finder chart

altitude today

altitude (year)

 search:

½°, , in DOCdb

show browsing

NGC 2259

NGC 2259, Cl Collinder 108, C 0635+109, VI 28, GC 1435

RA: 06h 38m 34.4s
Dec: +10° 53′ 24″

Con: Monoceros
Ch: MSA:203, U2:182, SA:12

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

(reference key)

Type: open cluster, 21pn

Mag: B=?, V=10.8

Size: 3′
PA: ?

Remarks

Also known as Collinder 108, this open cluster is described in the NGC as "considerably rich, extremely compressed, irregular shape, stars extremely small." Darnley Wright calls this cluster "a rich cluster of about 25 stars."

Historical observations

William Herschel (c.1784)

Synonyms: H VI-028

Discovered in 1787 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "a cluster of extremely compressed and eS stars, considerably rich, iF, the following and most compressed part round."

Published comments

Trumpler, R.J. (1928)

Trumpler (Lick Obs Bul, Vol 14, No. 420) gives the diameter as 3.5' and the class as 1 3 m.

Photo index

Photo Index by Jim Lucyk: Vehrenberg's Atlas of Galactic Neb-1 (on photo p103).

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.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 11.0 mag open cluster.

Modern observations

MacRobert, Alan M

MacRoberts writes "I couldn't see a trace of it in the 6-inch [45x] through my suburban light pollution." A 10-inch under dark skies, as used by Luginbuhl and Skiff, reveals it as "granular to partially resolved at 200x." The cluster has 25 member stars, the brightest being 14th magnitude, and is spread out over 4.5', giving it a combined magnitude of 11.0.

Steve Coe

Steve Coe, observing with a 13" f/5.6, notes: "is bright, pretty large, round, rich and very compressed at 100X. I resolved 15 stars against a very grainy backround at 220X. This is a nice, tight cluster, try some power."

Steve Coe (Glendale, Arizona, USA) observing with a 13.1-inch f/5.6 reflector, writes in The Webb Society Nebulae and Clusters Section Report No. 11, January 1993: "Bright, pretty large, rich, very compressed, and round at x100. Fifteen stars resolved against a very grainy background at x220. This is a nice, tight cluster. Try some power."

Tom Lorenzin

Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11M; 4' diameter; samll and rich; 25-plus 12M and dimmer members; difficult in 8-inch; easier with much larger aperture."

Contemporary observations

Tom Bryant

2009-04-17 22:30:00

Observing site: Pinnacles overlook

Telescope: C-11

[6h 38m 36s, 10 53m 0s] A small, faint cluster of a few 11.5 mv stars and a cloud of around 50 14mv stars.

Favourite lists

Lacaille's catalogue

The Messier objects

Dunlop's catalogue

The Bennett objects

The Caldwell list

Named DSOs

Object search

First search phrase

    and

Second search phrase

Type of object to include:

open cluster
globular cluster
planetary nebula
bright nebula
dark nebula
galaxy
galaxy cluster
asterism & stars
unverified/lost
nova

The Bug Report

DOCdb is still in beta-release.

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

> Bug Report

Feedback

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

> Contact us

Help!

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.