IC4725 - M25
DSS image of IC4725
Digitized Sky Survey image of IC4725, 60' x 60' with north at top and west to the right

DSS image of IC4725
Overlaid DSS image of IC4725, 60' x 60' with north at top and west to the right

Type  Open Cluster
Magnitude  4.6
Size  32'
RA (2000)  18h 31' 46.8"
Dec (2000)  19° 6' 54" S
Constellation  Sagittarius
Description  Cl, pC

Observing Notes

Andrew Cooper
11 Aug 2017 Waikoloa, HI (map)
Hodgepodge w/TV-76mm f/6 APO @ 30x

A large bright cluster, ideal for the 76mm, several sweeps of stars radiate out from the central group which is about 10' across, coarse, the full cluster appears to cover a 25' area, very obvious when sweeping the area at low power

Andrew Cooper
18 Apr 2010 Hale Pohaku, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 60x

Large! Bright, coarse, around 100+ 7th to 10th magnitude stars arranged in clumps across a 30' area

Andrew Cooper
28 Jun 1998 Santa Rita Mts., AZ (map)
20cm f/10 SCT

Almost just a thicker patch of the Milky Way but the concentration of bright stars makes it stand out

William Herschel
30 Jul 1783

Very large stars and some small ones; I counted 70, and there are many more within no considerable extent.

Charles Messier
20 Jun 1764

A cluster of small stars in the neighborhood of the two previous clusters [M23 and M24], between the head & the end of the bow of Sagittarius: the nearest known star to this cluster is 21 Sagittarii, 6th magnitude, according to Flamsteed. The stars of this cluster are seen with difficulty with an ordinary telescope of 3.5-foot; no nebulosity can be seen. Its position has been determined from Mu Sagittarii."

Rev. T.W. Webb
Hardwick, Herefordshire, England (map)

Coarse and brilliant. Not in G.C.
Other Data Sources for IC4725
Nearby objects for IC4725
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.