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RA: 06h 48m 59.2s
Dec: −36° 00′ 19.2″
Ch: MSA:392, U2:360, SA:19
Ref: SIMBAD, SEDS
Type: globular cluster
Mag: B=10.77, V=10.01
James Dunlop discovered this object from Paramatta, New South Wales, and included it as No. 578 in his catalogue of 1827. Using a 9-inch f/12 telescope, he described it as "a pretty bright round nebula, 3' or 4' diameter, moderately condensed to the centre. This is resolvable into stars."
Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "B, R, gpmbM, 3', all resolved into stars 14th mag. In the centre is a star 13th mag." On a second occassion he called it "globular cluster, pB, R, gbM, 90 arcseconds, resolved into stars 14th mag." His third observation was recorded as "B, irregularly round, gbM, 3', resolved into stars 14th..16th mag with stragglers, and some large stars near." The final record reads: "globular cluster, pB, irregularly round, gbM, 2.5', resolved into stars 13th mag."
Hinks, A. R. (1911) On the galactic distribution of gaseous nebulae and of star clusters. MNRAS, 71(8), 693-701.
List 6: "NGC numbers of clusters classed as globular, not in Bailey's catalogue"
Bailey, S.I. A catalogue of bright clusters and nebulae. Ann.Harv.Coll.Obs., 60(8), 199.
A catalogue of star clusters shown on Franklin-Adams chart plates. Mem.R.A.S., 60(5), 175-186.
RA 06 48 59.2 (2000) Dec -36 00 19 Integrated V magnitude 9.29 Central surface brightness, V magnitudes per square arcsecond 18.79 Integrated spectral type F5 Central concentration, c = log(r_total/r_core); a 'c' denotes a core-collapsed cluster 1.28 Core radius in arcmin .34. ["Catalog Of Parameters For Milky Way Globular Clusters", compiled by William E. Harris, McMaster University. (Revised: May 15, 1997; from http://www.physics.mcmaster.ca/Globular.html; Harris, W.E. 1996, AJ, 112, 1487) ]
The RNGC (Sulentic and Tifft 1973) notes that this is a 10.5 mag globular cluster.
Steve Coe, in SACNEWS On-Line for February 1996, writes: "NGC 2298 is pretty bright, pretty large, much brighter in the middle, 5 stars are resolved at 200X. This globular grows with averted vision. It was easy in the 11 X 80 finder. It is at 6 hr 49 min and -36 00."
AJ Crayon, using an 8" f/6 Newtonian, notes: "is a globular cluster. It is 5' 9m, suddenly much brighter in middle, there are two stars of 12 and 13m nearby involved to the northeast and southwest, at 100x."
Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "10M; 3' diameter; wait for clear, dark S sky to resolve individual stars."
Steve Coe, observing with a 13" f/5.6, notes: "Pretty bright, pretty large, much brighter in the middle, 5 stars are resolved at 200X. This globular grows with averted vision. It was easy in the 11 X 80 finder."
1994-02-08, Die Boord, 11x80's tripod-mounted. This cluster is just visible as a faint, small patch. Peet, observing with 8x30's, couldn't pick it up.
Location: Pietersburg (South 23 53. East 29 28).
Sky conditions: Good.
Instrument: Meade 12 inch (Eyepiece 40mm).
Date: 25 January 1998.
Field of view: 52.7 arc minutes.
Large, easy, bright globular cluster, well resolved and distributes. Outliers going out to granular fringes, no sharp edges, rather round irregular. Little brighter to the middle. Speckled starfield.
12-inch f/10 SCT (EP: 2-inch 40mm SW 76x 53' fov; 2-inch 14mm UW 218x 23' fov; 2-inch 8.8mm UW 346x 15' fov)
Large, bright globular cluster, well resolved with pinpoint stars. Outliers establish in the granular fringes. No sharp edges, but rather round and irregular in shape. Slowly getting little brighter to the core. Speckled star field (95x). Observed again with (218x). Globular comprises of all the qualities. Pretty, slowly brightens to a tight core compared in contrast to the rougher outer part. Short star strings, well distributed, situated on the outer parts displays bright specks of diamonds that stand out well against the field of view. Detect visible haziness embedded in and around this globular. Extremely busy star-field.
Observing site: Fall Star Party
[6h 49m 0s, -36° 0' 0"] A nice, easily resolved GC. It appeared slightly asymetric. Brightest stars 13.4mv ngciciproject.org "A cluster being disrupted" deMarchi & Pulone, Ast&AstPhy May, 2007.
Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.
This globular clusters stars are unresolved and that the stars in this cluster are strongly condensed as an oval snowball which looks like an out of focus ball of light.The central nucleus of this cluster grows slightly brighter compared to the stars on the far outskirts of this cluster.The nucleus of this cluster is moderately faint as a pale glow of grey light.No stars are seen in this globular cluster.This globular cluster measures 6.2'x 5.1'.
The Messier objects
The Bennett objects
The Caldwell list
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