Messier 30 - NGC 7099

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Bode 68, h 2128, h 3878, GC 4687, C 2137-234, ESO 531-SC021

Type  Globular Cluster
Magnitude  7.5
Size  11'
Right Ascension  21h 40' 22.1"  (2000)
Declination  23° 10' 48" S
Constellation  Capricornus
Description  !, B, L, lE, gpmbM, st 12...16
Classification  V
Observing Notes

Andrew Cooper
Jul 23, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 61x
Seeing: 5 Transparency: 7 Moon: 0%

Bright, pretty, resolved, modest core, about 10' in diameter, an excellent globular cluster in an otherwise sparse region of the sky

Andrew Cooper
Jun 27, 2020    Waikoloa Quarry, HI (map)
28cm f/10 SCT, NexStar 11" GyPSy @ 127x
Seeing: 7 Transparency: 7 Moon: 0%

Big at about 10', bright, a dense core, fully resolved, a very lovely globular cluster

Andrew Cooper
Aug 11, 2018    Kaʻohe, Mauna Kea, HI (map)
28cm f/10 SCT, NexStar 11" GyPSy @ 233x
Seeing: 7 Transparency: 7 Moon: 0%

Large, bright, well concentrated core, fully resolved, two conspicuous chains of stars radiate from the core to the west

Andrew Cooper
Apr 19, 2012    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 6 Transparency: 7 Moon: 0%

A curiously irregular globular cluster, oddly asymmetric with two chains of brighter stars emerging from the core to the northwest, about 7' diameter, bright

Andrew Cooper
Apr 18, 2010    Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 6 Transparency: 7 Moon: 0%

Good sized at 10' across, bright, well resolved, a number of brighter stars involved including two odd chains that extend away from the core to the north

Andrew Cooper
Aug 27, 2005    TIMPA, Avra Valley, AZ (map)
46cm f/4.5 Deep Violet

Rich, fully resolved, good sized, core not particularly dense, edges seem ragged and uneven, two lines of brighter stars radiating out from the north side of the cluster

Rev. T.W. Webb
May 19, 1885    Hardwick, Herefordshire, England (map)
94mm f/18 Tully Achromat

Moderately bright; beautifully contrasted with an 8 mg. star beside it; comet-like with 64; with higher powers resolvable (into 12 mg. stars. h.) ' What an immensity of space is indicated! Can such an arrangement be intended, as a bungling spouter of the hour insists, for a mere appendage to a speck of a world on which we dwell, to soften the darkness of its petty midnight? This is impeaching the intelligence of Infinite Wisdom and Power, in adapting a grand means to so disproportionate an end. No imagination can fill up the picture, of which the visual organs afford the dim outline; and he who confidently probes the Eternal Designs cannot be many removes from lunacy' (Sm.) E. of Rosse, spiral arrangement of branches. It lies closely p a little n from 41, a 5 mg. star.
― Celestial Objects for Common Telescopes, T. W. Webb, 1917

Charles Messier
Oct 24, 1764    

Nebula discovered below the tail of Capricornus, very near to the star 41 of that constellation, of 6th magnitude, according to Flamsteed. One sees it with difficulty with an ordinary telescope of 3.5-foot. It is round & contains no star; its position determined from Zeta Capricornusi, M. Messier reported it on chart of the Comet of 1759. Mem. Acad. 1760, pl. II.
― Connaissance des Temps, 1781

William Herschel

A brilliant cluster, the stars of which are gradually more compressed in the middle. It is insulated, that is, none of the stars in the neighborhood are likely to be connected with it. Its diameter is from 2'40" to 3'30". The figure is irregularly round. The stars about the centre are so much compressed as to appear to run together. Towards the north, are two rows of bright stars 4 or 5 in a line.
Other Data Sources for Messier 30
Nearby objects for Messier 30

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

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Messier 30