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Type: galaxy, Sc
Mag: B=12.19, V=11.08
Size: 2.951′ x 1.659′
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Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "F, pL, lE, glbM, near 2 stars." On a second occassion he called it "B, L, lE, vgmbM, to a star 13m."
Reynolds, J.H. (1921) The spiral nebulae in the zone –40° to –90° (from the Franklin-Adams Plates). MNRAS, 81, 598.
Table p 601: 4x2, "BN"
De Vaucouleurs (1956) "Survey of bright galaxies south of -35° declination", Mem. Mount Stromlo, No. 13. (photographic study, plates taken with the 30-inch Reynolds reflector, 20-inch diaphragm).
(Astrophysical Journal, 202, 563-582) notes that this galaxy is a member of the IC 1459 Grus Group. Members include NGC 7410, NGC 7412, NGC 7418, NGC 7421, NGC 7424, NGC 7496, NGC 7531, NGC 7552, NGC 7582, NGC 7590, NGC 7599, IC 1459, IC 5267, IC 5269 & IC 5273.
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.0 mag galaxy. Their coded description reads SB,BM,BKN N ARM.
Shobbrook (1966, Mon. Not. R. astr. Soc., Vol 131, p351-363) notes that this member of the Grus Cluster has V = 11.77, B-V = 0.58 and U-B = 0.00. It measures 2.7 by 2.1.
Steve Coe, observing with a 13" f/5.6, notes: "Very faint, pretty large, round and very little brighter in the middle at 100X."
15cm - fairly br oval w/two br *s nr @ 80x. 140x: 2'x1' elong SSE-NNW. m11 *
N side, m12.5 * E. mod even concen but seems disturbed, I think due to
* sup SE of ccenter a bit off from maj axis to E. BS, 14Nov1993, LCO.
16-inch f/10 SCT (EP: 2-inch 40mm SW 102x 26' fov, 2-inch 32mm SW 127x 32' fov, 2-inch 14mm UW 290x 17' fov, 2-inch 8.8mm UW 462x 11' fov)
Lies about 55 arcminutes the east of Theta Gruis. NGC 7496 appears as one elongated smear of light.
Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.
This galaxy has a slightly oval shape and is well defined.The nucleus of this galaxy is strongly condensed and that this galaxy has some areas of uneven brightness on the far outskirts of this galaxy.No darker areas have been seen in this galaxy.The nuclues of this galaxy grows slightly brighter compared to the far outskirts of this galaxy.This galaxy measures 5.7'x 1.4'with PA NNW-to-SSE.Challenge Rating:Difficult.Chart:No.143,NSOG Vol.3
The Messier objects
The Bennett objects
The Caldwell list
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