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RA: 01h 03m 14.27s
Dec: −70° 50′ 53.6″
Ch: MSA:501, U2:441, SA:24
Ref: SIMBAD, SEDS
Type: globular cluster
Mag: B=7.97, V=7.21
James Dunlop discovered this globular from Paramatta, New South Wales, and included it as No. 62 in his catalogue of 1827. Using a 9-inch f/12 telescope, he described it as "A beautiful bright round nebula, about 4' diameter, exceedingly condensed. This is a good representation of the 2nd of the Connaissance des Tems in figure, colour, and distance; it is but a very little easier resolved, rather a brighter white, and perhaps more compact and globular. This is a beautiful globe of white light; resolvable; the stars are very little scattered." He observed it on 11 occassions.
Sir John Herschel observed it at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He called it a "fine, highly condensed globular cluster; pretty suddenly brighter in the middle; diameter 4'." On 3 November 1834 he called it "very bright; very large; pretty suddenly very much brighter to the middle; round; 5' or 6' diameter; all resolved." Observing the next night, he recorded it as "a globular cluster; very bright; very large; pretty gradually very much brighter to the middle. Diameter of more condensed part approx. 60 arcsec in RA; but there are loose stars to a considerably greater distance, stars 13 or 14 mag all nearly equal and distinct, but run into a blaze in centre." His final observation reads: "globular cluster, very bright, very compact; pretty suddenly very much brighter in the middle; 4' across; all resolved into stars 13..15 magnitude."
The NGC entry records it as "very bright, very large, very compressed, very much brighter in the middle, consisting of stars of 13th-14th magnitude".
"Dun 62; diam 10; !! globular cluster, condensed."
Bailey, S.I. (1908) A catalogue of bright stars and nebulae. Ann.Harv.Coll.Obs., 60(8), 199.
Remarks, p.216: "An interesting globular cluster near the SMC but distinct from it. Though far interior to 47 Tuc, NGC 104, it resembles it somewhat closely. It contains 14 known variable stars."
A catalogue of star clusters shown on Franklin-Adams chart plates. Mem.R.A.S., 60(5), 175-186.
Doig, P. (1925) Notes on the nebulae and clusters in Webb's 'Celestial Objects for Common Telescopes' (Sixth edition, Vol.ii). Part V. M.N.R.A.S., 36(3), 89.
Table IV: RA corrected
The RNGC (Sulentic and Tifft 1973) notes that this is a 8.0 mag globular cluster.
RA 01 03 14.3 (2000) Dec -70 50 54 Integrated V magnitude 6.40 Central surface brightness, V magnitudes per square arcsecond 14.88 Integrated spectral type F9 Central concentration, c = log(r_total/r_core); a 'c' denotes a core-collapsed cluster 1.94c: Core radius in arcmin .17. ["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) ]
Hartung writes that "this beautiful globular cluster is well resolved to a very bright compressed centre, the main part 2' wide and the scattered outliers reaching to 4' It is symmetrical and approximately round. A 6-inch resolves it well, four-inch shows undoubtedly some very faint stars in it, and it looks granular with a 3-inch".
ASV Journal, Vol 24, No 3, June 1971: "easy in 10x50's."
15cm - nice vbr gc w/sharp cen, part res @ 50x. 140x: part res w/strong
bkgrnd haziness. mod-sharp concen to vbr 10" nuc. outliers reach on
avg 2/3 distance to m12 * due E. outline irreg, however. BS, 8Nov1993,
Danie Cronje, observing with 10x50 binoculars, calls it "small, bright, round, almost perfectly stellar core."
Observing with 8x40 hand-held binoculars, this globular looks like a slightly unfocused star. Small and reasonably bright, but no details visible. The cluster measures 12.9' across, shines at magnitude 6.4 and has a concentration rating of 3.
11x80: 1997-10-09, 02:30, Jonkershoek, seeing 3, transparency 3, darkness 3 "Easy, small bright blaze on edge of the SMC. Visible with the naked eye."
1994-12-04, Die Boord, 6-inch f/8.6 Newtonian. This globular is very bright, and does not have a prominently small nucleus.
12-inch f/10 SCT (EP: 2-inch 40mm SW 76x 53' fov; 2-inch 14mm UW 218x 23' fov)
Very small, bright and neat little globular cluster on the north edge of the SMC. The centre displayed a compressed bright star-like core about 3' arc minutes wide. The globular is sprayed with well-resolved 11 to13 magnitude stars, which run out into the outer fringes. Some of the areas around the centre appeared slightly granular. Outside the field of view a few clumps of stars nestle together in the SMC. (Mag = 6.6; size = 12.9')
Location: Pietersburg. ( South 23 53. East 29 28).
Sky conditions: Very good 7 magnitude.
Instrument: Meade 12 inch (Eyepiece super 40mm).
Date: 20 November 1997.
Field of view: 52.7 arc minutes.
Very neat little globular with a compressed bright starlike nucleus. Pinpoint bright and faint stars running out from this globular cluster all over in the field. Appears a bid granular.
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 cluster is arranged in the shape of an out of focus pebble and that the stars in this cluster are well resolved.The nucleus of this cluster is relatively compact which looks like a halo of white soft light.This globular cluster measures 2.7'x 2.4'.
Instrument:12-inch Dobsonian Reflector Telescope.
Eyepieces:26mm Super Wide Field Eyepiece. 20mm Ultra Wide Angle Eyepiece.
Sky Conditions:Whole Milky Way is visible.
Transparency of the Sky:The sky is clean.
Seeing:Atmosphere stable with little interference.
Limiting Magnitude:Magnitude 6.
First Impression:This object looks like a swarm of stars grouped together one.
Size in Arc Minutes(Nucleus)=7.1'.
From the far outskirts of this globular cluster it grows brighter in the nucleus.
This globular cluster is well resolved into a large agglomeration of bright stars radiating away from the central outskirts of the nucleus.This globular cluster is well centrally concentrated.
Location: Riviera, Pretoria
Telescope: Orion 10 In Dob
Limiting magnitude: 4.5
Sky conditions: Good seeing and transparency
Eyepiece: 10 mm
Appears as a faint round fuzzy patch. Very little detail is visible. No individual stars of the globular cluster are visible. Bigger magnification makes it almost invisible.
The Messier objects
The Bennett objects
The Caldwell list
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