NGC7099 - M30
DSS image of NGC7099
Digitized Sky Survey image of NGC7099, 30' x 30' with north at top and west to the right

DSS image of NGC7099
Overlaid DSS image of NGC7099, 30' x 30' with north at top and west to the right
ESO 531-SC021, GC 4687, h 2128, h 3878

Type  Globular Cluster
Magnitude  7.5
Size  11'
RA (2000)  21h 40' 22.1"
Dec (2000)  23° 10' 45" S
Constellation  Capricornus
Description  !, B, L, lE, gpmbM, st 12...16

Observing Notes

Andrew Cooper
19 Apr 2012 Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x

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
18 Apr 2010 Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x

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
27 Aug 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

Charles Messier
24 Oct 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."

Rev. T.W. Webb
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.

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 NGC7099
Nearby objects for NGC7099
7 objects found within 120'
IC5122 NGC7103 IC5124
NGC7104 IC1393
Palomar 12
Acknowledgements and Credits...

Drawings, descriptions and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission. Use for non-profit and educational reasons is generally given on request.

Positional and some physical information is from the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

Additional object data from the SIMBAD database, operated at CDS, Strasbourg, France.

The Digitized Sky Survey was produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope.

Dark nebulae data from E.E. Barnard, A Photographic Atlas of Selected Regions of the Milky Way. Ed. Edwin B. Frost and Mary R. Calvert. Carnegie Institution of Washington, 1927

Object descriptions of Rev. Webb from Celestial Objects for Common Telescopes sixth edition, Rev. T.W. Webb, 1917, edited by Rev T.E.Espin.