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NGC 7171 (16,976 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




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altitude today

altitude (year)


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NGC 7171

NGC 7171, AGC 610149, LEDA 67839, MCG-02-56-005, III 692, h 2138, GC 4728

RA: 22h 01m 2.15s
Dec: −13° 16′ 11.6″

Con: Aquarius
Ch: MSA:1332, U2:301, SA:17


(reference key)

Type: galaxy, Sb

Mag: B=12, V=?

Size: 2.511′ x 1.38′
PA: ?

Historical observations

William Herschel (c.1784)

Synonyms: H III-692

Discovered in 1787 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "eF, E np-sf, 2' long, 1' broad."


Recorded in the NGC as "very faint, considerably large, elongated PA 124 , vert gradually brighter in the middle."

Published comments

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag galaxy. Their coded description reads S,SLEL,BM,SLDIF,DLNS.

Helwan Obs. Bulletin No 21 (1920)

F, 2.5'x1.5', E 120deg, spiral, with alm. stell. N. consisting of two oval rings, the n.p. portion of the outer one being absorbed.

Modern observations

Steve Coe

Steve Coe, using a 17.5" f/4.5, notes: "Faint, pretty small, elongated 2X1 and somewhat brighter in the middle at 100X."

Brian Skiff

POSS: 2'.0x1'.2 in pa119, SAB(s)bII. m10-11 *s ~4' NE. m14 * at ESE tip at 52". no other *s. sm blob 1'.9 WNW of center along maj axis. gx I1417 at 12' pa306; 1'.75x0'.65 in pa110 w/long Wrn extn; prob ScIII. * NE implies 15cm size of 1'.8x0'.9.

ESO: pa120.

15cm - pretty f, losfcbr, but vis @ 50x. 140x: pa115, 1'.2x0'.6. m15 * S of ESE tip defines end. vwk broad concen across grainy sfc. BS, 21Jun1990, Anderson Mesa.

25cm - barely found SW of a line of three evenly spaced m10.5 *s. pretty f, elong in pa150, 3'x1'. center sl brtr; a smooth ellipse. BS.

30cm - 238x: losfcbr. 2'x1' w/40" core, pa150. sev m14 *s assoc, one NE of core. CBL, Roof.

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