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Type: galaxy, Sc
Mag: B=10.99, V=10.38
Size: 7.413′ x 5.623′
Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "vF, lE, 45 arcseconds." On a second occassion he called it "F, vL, R, vgmbM, 3' diam."
Hardcastle, J.A. (1914) Nebulae seen on the Franklin-Adams plates. MNRAS, 74(8), 699-707. [commentary in Shapley, H. & Ames, A. (1932) A survey of the external galaxies brighter than the thirteenth magnitude.]
The following have not, I believe, been described before: -
NGC 7424 cF. R. 6'.
Reynolds, J.H. (1921) The spiral nebulae in the zone –40° to –90° (from the Franklin-Adams Plates). MNRAS, 81, 598.
Table p 601: 6x6, "F, well defined spiral"
pF, 6'x6', pretty bright nucleus E 130deg; spiral with open whorls and condensations.
F, 6'x6', spiral with pF N E 130deg, open whirls and condensation, confirms HOB 22.
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 11.0 mag galaxy. Their coded description reads S,SHORT BBAR,VFSSTR.
Shobbrook (1966, Mon. Not. R. astr. Soc., Vol 131, p351-363) notes that this member of the Grus Cluster has V = 12.09, B-V = 0.61 and U-B = 0.01. It measures 8.8 by 7.0.
de Vaucouleurs, G. (1975) Nearby groups of galaxies. In: Kuiper, G. (ed) Stars and Stellar Systems. Volume 9: Galaxies and the Universe. Chapter 14, p557.
Possible foreground object: IC 5332 (in Sculptor group?)
Brightest members: NGC 7552 ( B(0) = 11.44), NGC 7424 ( B(0) = 11.46), NGC 7410 ( B(0) = 11.61), IC 5267 ( B(0) = 11.65), NGC 7582 ( B(0) = 11.84).
Steve Coe, observing with a 13" f/5.6, notes: "Very faint, large, round and little brighter in the middle at 100X. This object is low surface brightness and demands dark skies and a clear night."
15cm - mod br but modlosfcbr @ 80x. halo reaches to V=12.2,13.5 (T&B) pair on
NNW, or ~5' diam. wk broad concen except 1' core which is wk even. core
usually elong NE-SW. BS, 14Nov1993, LCO.
The Messier objects
The Bennett objects
The Caldwell list
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