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 4220 (8,966 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 4220

NGC 4220, LEDA 39285, MCG+08-22-089, UGC 7290, I 209, h 1151, GC 2811

RA: 12h 16m 11.7s
Dec: +47° 52′ 57.7″

Con: Canes Venatici
Ch: MSA:592, U2:74, SA:7

Ref: SIMBAD

(reference key)

Type: galaxy, Sa

Mag: B=12.4, V=?

Size: 3.801′ x 1.548′
PA: 141°

Historical observations

William Herschel (c.1784)

Synonyms: H I-209

Discovered in 1788 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "cB, cL, E, mbM."

Published comments

Burnham's Celestial Handbook

Burnham calls it a 12.3 mag spiral galaxy in Canes Venatici, measuring 2.5' x 0.6', which is considerably bright, pretty large, pretty much elongated, pretty suddenly brighter in the middle, lens-shaped.

Supernovae

A supernova erupted in this galaxy in 1983 (14.5p)

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag galaxy. Their coded description reads DIF,SPN,BM.

Modern observations

Tom Lorenzin

Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12.3M; 2.5' x 0.5' extent; soft, NW-SE-oriented slash with brighter center; 8M star 15' due N; good supernova prospect."

Brian Skiff

UGC: pa141.

15cm - 3'x1', a dull, uniformly br patch. vis in dk sky only.

25cm - elong SE-NW, 2'.5x0'.75. m12 *ar nuc. curious extns from core perpendic

to maj axis suspected. mod f.

30cm - pa130, 2'.5x0'.8 @ 220x. bulging middle: lentic form. mod broad concen w/

elong inner regions. a f circ non*ar nuc can be seen only w/averted vis.

concen part seems to lie closer to SW side.

Contemporary observations

Magda Streicher

2006 April

Alldays

12-inch f/10 SCT (95x/52.8′, 218x/23.1′)

This galaxy could be just be a miniature of M106 as seen with 12" S/C 95x. Soft, small smear of light in a NW-SE direction. Slowly brightens to a slightly brighter nucleus 12" S/C 218x. It also corresponds with the size of 4' in length towards my field of view 23.1 FOV.

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.