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 5557 (12,266 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 5557

NGC 5557, LEDA 51104, MCG+06-31-093, UGC 9161, I 99, h 1776, GC 3843

RA: 14h 18m 25.8s
Dec: +36° 29′ 35.9″

Con: Bo÷tes
Ch: MSA:627, U2:110, SA:7

Ref: SIMBAD

(reference key)

Type: galaxy, E

Mag: B=12.2, V=?

Size: 2.344′ x 1.584′
PA: 105°

Historical observations

William Herschel (c.1784)

Synonyms: H I-099

Discovered in 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "vB, S, R, vsmbM."

Published comments

Burnham's Celestial Handbook

Burnham calls it a 12.6 mag elliptical galaxy in Bootes, measuring 0.9' by 0.8' which is suddenly much brighter in the middle, considerably bright, small and slightly elongated.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads E,R,BM.

Modern observations

Steve Coe

Steve Coe, using a 13" f/5.6, notes: "Pretty bright, pretty large, little elongated 1.5 X 1 in PA 90 and much brighter in the middle with an almost stellar nucleus at 165X."

Tom Lorenzin

Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.3M; 1.3' diameter; soft round glow with brighter, almost stellar nucleus 5' ESE of an 11M star; 1 degree S and a bit E is 5M SAO 64053; 25' WSW of star is SP GAL N5533 (12M; 2.5'x 1.5' extent)."

Brian Skiff

RC3: V=11.0/12.6

15cm - f, sm br nuc.

- mod br @ 80x w/ br center. 140x: circ or sl oval (elong NE-SW), 1'.5

diam. strong sharp concen to vbr *ar nuc. two m13 *s SE make triangle 5'

on-a-side. BS, 7Jun1991, Anderson Mesa.

25cm - easily seen, circ, broad core fades evenly to edge. 122x: 1' diam.

30cm - mod br, well concen @ 140x, *ar nuc and br core. 220x: br part 30" diam,

halo fairly extensive to 1'.1. br inner region makes nuc occas appear

dbl.

Contemporary observations

Magda Streicher

(no date)

Alldays (22.50S, 20.12E, 770m).

12-inch f/10 SCT (218x, 346x)

Round in appearance with bright a core, with fuzzy envelope around which is very much surround by nebulosity. In a NW-SE direction and about 2.2' in size.

Tom Bryant

2011 6 7 0:26:48

Observing site: Little Bennett Regional Park

Telescope: C-11

[14h 18m 24s, 36░ 30m 0s] Small, round E? B: E1.

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.