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 7184 (16,998 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 7184

NGC 7184, AGC 34988, ESO 601-9, LEDA 67904, MCG-04-52-009, SGC 215952-2103.3, UGCA 425, II 1, h 2143, GC 4739

RA: 22h 02m 39.8s
Dec: −20° 48′ 46″

Con: Aquarius
Ch: MSA:1356, U2:346, SA:23

Ref: SIMBAD

(reference key)

Type: galaxy, Sb:r

Mag: B=12.05, V=11.2

Size: 6.025′ x 1.348′
PA: 62°

Historical observations

William Herschel (c.1784)

Synonyms: H II-001

Discovered in 1783 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "F cL mE bM easily resolvable."

NGC/IC Dreyer (1888, 1895, 1908)

This 12th magnitude spiral galaxy is recorded in the NGC as "pretty bright, pretty large, much elongated PA 64 , between three stars, easily resolvable."

Published comments

Burnham's Celestial Handbook

Burnham calls it "pretty bright, pretty large, much elongated, brighter in the middle to a nucleus, with Saturn-like inner ring."

Supernovae

A supernova erupted in this galaxy in 1984 (14.0pg)

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 12.0 mag galaxy. Their coded description reads S,EL,BM,DIF,BRGNRNUC.

Helwan Obs. Bulletin No 22 (1921)

F, 5'x1', E 55deg; spiral with rather compact but well defined whorls and B sharp stell.. surr. by a rather brighter patch of nebulosity. There are signs of absorption in n.p. portion. Many other small nebulae in this field.

Modern observations

Tom Lorenzin

Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12M; 5' x 1' extent; fat, NE-SW-oriented slash with bright center and stellar nucleus."

Steve Coe

Steve Coe, using a 17.5" f/4.5, notes: "Faint, pretty small, much elongated 4x1 with a bright nucleus. There is a hint of a dark lane with averted vision at 135X. There are two attendant galaxies 20' to the NE, they are both very faint, small and round."

Brian Skiff

POSS: 4'.6x1'.3 in pa60, SA(r)abIII. m11.5 * at 2'.6 in pa62, just off tip. m15 * at 1'.0 pa79. NW flank of core & halo sl more well-def.

15cm - mod br velong spindle in pa65 @ 80x, sev *s inv. 140x: 5'x0'.8, reaches about to m12.5 * at ENE tip and to distance WSW of two brtr *s N of flank and m14 * to S. wk even but irreg concen to rel sm 1'x0'.6 core and *ar nuc. ENE along maj axis is another br lump, giving impression of dbl core. BS, 15Oct1990, Anderson Mesa.

25cm - 180x: 4'.5x1'.5 in pa110. core circ, 1' across w/*-like point inv on S side of core. m13 * at NE tip. BS, Roof.

30cm - elong pa45, 6'x1'. NE is m13 * outside neb. unevenly br core 1'.2x0'.8, more definite on NW side. CBL, Roof.

Contemporary observations

Magda Streicher

1998 August

Galaxy, Aquarius

Location: Campsite (23 16 South - 29 26 East).

Telescope: Meade 8" 18mm eyepiece, 36 arcmin f.o.v.

Date: August 1998.

Sky conditions: Not very good.

Description: Very faint spindle 5x2, north to south with a suggestion of brightness to the nucleus. To the west just outside this galaxy two separate stars visible and two arc minutes away another pair of stars, resembles Jupiter and its moons. A faint little star on the south tip embedded. Just visible outside the field of view NGC 7180 and NGC 7185.

(no date)

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

12-inch f/10 SCT (218x)

Very faint spindle 5x2, NE-SW with a suggestion of brightness to the nucleus. To the north just outside this galaxy two separate stars visible and two arc minutes away another pair of stars, resembles an elongated Jupiter and its big moons. A 12 Magnitude star is embedded on the southern tip of the galaxy. Just visible outside the field of view to the west is NGC 7180, NGC 7185 and to the north NGC 7188. Very elongated NE-SW and the brightest in the group. The nucleus is outstanding and bright. The galaxies to the north show just wimps of light, very small and slightly round in shape.

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.