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RA: 20h 09m 54.12s
Dec: −48° 22′ 47.4″
Ch: MSA:1472, U2:411, SA:23
Type: galaxy, E...
Mag: B=11.83, V=10.79
Size: 3.63′ x 2.951′
Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "vB, S, R, pgmbM, 20 arcseconds." On a second occassion he called it "vB, R, gvmbM, 30 arcseconds."
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).
Sandage (1975(Astrophysical Journal, 202, 563-582) notes that this galaxy is a member of the Telescopium Group. Members include NGC 6851, NGC 6861, NGC 6861D, NGC 6868, NGC 6870, NGC 6875, NGC 6878, NGC 6890, NGC 6893, NGC 6902, NGC 6909 & ESO 285- G 7.
G. de Vaucouleurs ("Galaxies and the Universe", Chapter 14 - Nearby Groups of Galaxies) notes that the five brightest members of the NGC 6861 Group are NGC 6868, NGC 6861, ESO 285- G 7, NGC 6902 & NGC 6893.
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag galaxy.
Shobbrook (1966, Mon. Not. R. astr. Soc., Vol 131, p351-363) notes that this member of the Telescopium Cluster has V = 11.58, B-V = 1.03 and U-B = 0.61. It measures 0.9 by 0.7.
15cm - brtst of grp @ 80x. 140x: 2'x1'.6 in pa70. strong even concen to brtr oval core and *ar nuc. m15 * NE edge. BS, 12Nov1993, LCO.
22 August 1998, Farm site, Meade 8" with a 18mm wide angle & 26mm Plossl, 36' fov, Sky Conditions: Clear 7 to 8 magnitude
Resembles a small roundish elongated (west to east) shadow, getting slowly brighter to the nucleus. Bright stars to the west a few arc minutes away. Busy medium starfield.
The Messier objects
The Bennett objects
The Caldwell list
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