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 4993 (11,157 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


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 4993

NGC 4993, NGC 4994, ESO 508-18, LEDA 45657, MCG-04-31-039, SGC 130705-2307.1, III 766, GC 3428

RA: 13h 09m 47.2s
Dec: −23° 23′ 4″

Con: Hydra
Ch: MSA:867, U2:330, SA:21

Ref: SIMBAD

(reference key)

Type: galaxy, E/S0

Mag: B=?, V=?

Size: 1.318′ x 1.122′
PA: 171°

History and Accurate Positions for the NGC/IC Objects (Corwin 2004)

NGC 4993 = NGC 4994. I do not know where JH's incorrect declination for this observation of N4494 came from, but it is 50 arcmin too far north (his father got the right position for the galaxy). Whatever happened, JH's observation fits exactly in RA and in its description of the galaxy, so I am confident of the identity. There is nothing at JH's position.

LEDA has picked up a galaxy too faint and small for JH to have seen, and it is well off his position by non-digit amounts (21 seconds of time and 4.3 arcmin).

Historical observations

William Herschel (c.1784)

Synonyms: H III-766

Discovered in 1789 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "vF, vS."

Published comments

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 14.0 mag galaxy. Their coded description reads E,R,BM.

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.