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 3169 (6,764 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 3169

NGC 3169, LEDA 29855, MCG+01-26-026, UGC 5525, I 4, h 685, GC 2041

RA: 10h 14m 14.82s
Dec: +03° 27′ 59.1″

Con: Sextans
Ch: MSA:756, U2:234, SA:13


(reference key)

Type: galaxy (AGN LINER-type), Sb

Mag: B=11.9, V=?

Size: 4.677′ x 2.511′
PA: 45°

Image gallery

Photos  (1)

Select a photo and click the button to view


This galaxy pairs with NGC 3166, lying north of Alpha Sex. It is of 11th magnitude and about 4' long.

Historical observations

William Herschel (c.1784)

Synonyms: H I-004

Discovered in December 1783 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "cB pL Resembling a telescopic comet. mbM."

Published comments


A supernova erupted in this galaxy in 1984 (15.0v)

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads S,EL,MBM,DKLNS,NARMS DST ARM S OF DSK.

Modern observations

Tom Lorenzin

Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.5M; 4' x 1.5' extent; stellar nucleus; SP GAL N3166 is W-most of pair with SP GAL N3169 (11.4M; 4' x 2' extent); 9' separation between galaxies; EL GAL N3156 (12.5M; 2' x 1' extent) 45' to SW of N3166; has stellar core and 8M star nearby to E; all are !good supernova prospects!."

Steve Coe

Steve Coe, observing with a 13" f/5.6, notes: "Pretty bright, pretty large, elongated 1.5 X 1 in PA 45 and much brighter in the middle at 100X."

Walter Scott Houston

Houston writes of a "pair of galaxies [NGC 3166 & NGC 3169] separated by only 8'. Both fit within the same field of a high-power eyepiece. At magnitude 10.6 and 5' long, NGC 3166 is easy. Its companion to the west, NGC 3169, is about the same size and brightness..."

Within range of a 6-inch, about 11th magnitude. Close to the west, a third fainter member of the group can be seen in a good 12-inch.

Contemporary observations

Tom Bryant

2009-04-17 22:30:00

Observing site: Pinnacles overlook

Telescope: C-11

[10h 14m 12s, 3 28m 0s] Looks like an Sa (Burnham: Sb). Near 3166.

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.