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NGC 7176 (16,992 of 18,816)

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NGC 7176

NGC 7176, ESO 466-41, HCG 90b, LEDA 67883, MCG-05-52-011, SGC 215914-3213.9, UGCA 423, h 3911, GC 4733

RA: 22h 02m 8.45s
Dec: −31° 59′ 29.5″

Con: Piscis Austrinus
Ch: MSA:1404, U2:383, SA:23

Ref: SIMBAD

(reference key)

Type: galaxy, E

Mag: B=12.66, V=?

Size: 1.23′ x 1.047′
PA: ?

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Photos  (1)

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Remarks

A 12th magnitude galaxy, about 1' across, in Pisces Austrinus. Part of a tight bunch of three galaxies, NGC 7173 & NGC 7174. A fourth, more prominent galaxy, NGC 7172, is part of the quartet.

Historical observations

John Herschel (1847) Cape Observations

Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "vB, pL, sbM to a star, has a very faint star S.p.." On a second occassion he called it "B, R, mE, or rather distinctly binuclear, or a double nebula. Pos of the smaller about 250 degrees. Much brighter and better seen than last night. Not a doubt about the nature of the appendage." His third observation was recorded as "B, pS, R, double." The next record reads: "B, R, gpmbM, 40 arcseconds." The fifth record reads: "B, pL, R, smbM." The final record reads: "B, R, pgbM, 40 arcseconds."

Published comments

Helwan Obs. Bulletin No 9 (1912)

A nebulous star attached at one end of NGC 7174. There are several other small and faint spindles in this region.

Helwan Obs. Bulletin No 22 (1921)

B, S, globular nebula, att.f.end of NGC 7174; exactly similar to NGC 7173. See HOB9.

Sandage (1975)

Sandage (1975(Astrophysical Journal, 202, 563-582) notes that this galaxy is a member of the NGC 7173 Quartet. Members include NGC 7173 and NGC 7176.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads BDBW/7173,CONT.

Modern observations

Clarke, W.P. (1993)

William P. Clarke (San Diego, California, USA) writes in the The Webb Society Nebulae and Clusters Section Report No. 11, January 1993: "A group of four galaxies [NGC 7172, 7173, 7174 & NGC 7176] bunched together, the brightest being NGC 7172, which is the northernmost of the group. This object is extended E-W, with a bright nucleus. NGC 7173 is 3.4' south; it is nearly round and has a bright centre. NGC 7174 & 7176 are just S.f. NGC 7173; they are close enough together that their halos merge. Only the two bright nuclei allow them to be distinguished. (17.5-inch Newtonian, x227)"

Brian Skiff

Anon:

15cm - in N7176 grp S of main trio. 10" diam, vf @ 80x/140x. m15 * on E? BS,

15Nov1993, LCO.

Contemporary observations

Richard Ford

2011 October, 29th Saturday

Location:Perdeberg.

Instrument:12-inch Dobsonian Reflector Telescope.

Sky Conditions:The fainter parts of the Milky Way are barely visible with the naked eye.

Transparency Of The Sky:Haziness only visible on the horizon.

Seeing:Atmosphere stable with little interference.

Limiting Magnitude:4.9.

NGC 7176

--------

Object Type:Galaxy.

First Impression:This object looks like a galaxy.

Location:Piscis Austrinus.

Time:11:10pm.

Chart Number:No.19(Extract taken out of "Atlas of the Night Sky").

Size:26mm Eyepiece:Field Of View:57'/16= 3.5'.

20mm Eyepiece:Field Of View:50'/14= 3.5'.

3.5'+ 3.5'= 7'.

7'/2= 3.5'.

Size in Arc Minutes:3.5'.

Ratio:1:3.

Major Axis:3.5'.

3.5'/3= 1.1'.

Minor Axis:1.1'.

Galaxy is 3.5'* 1.1'.

Brightness:Magnitude 11.9.

Brightness Profile:Right from the central outskirts of this galaxy the galactic nucleus grows slightly brighter.

Challenge Rating:Very Difficult.

Description

-----------

This galaxy is well seen as a very faint smudge of light which has a roundish shape to it and its surface brightness is slightly brighter compared to NGC 5174.The galactic nucleus of this galaxy is centrally concentrated.All over this galaxy there are some areas of uneven brightness.This galaxy is well situated in a star poor region of 9th to 10th magnitude stars.

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