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NGC 6604
NGC 6604 and its surroundings taken by the Wide Field Imager attached to the 2.2-metre MPG/ESO telescope at the La Silla Observatory in Chile
Observation data (J2000 epoch)
Right ascension
18h 18m 03.0s[1]
Declination
−12° 14′ 30″[1]
Distance
4,580 ly (1,403 pc)[2]
Apparent magnitude (V)
6.5[3]
Physical characteristics
Estimated age
6.5 Myr[1]
Other designations
NGC 6604, Cr 373, MM 23, OCl 56, C 1815-122, CTB 50, NRL 17, [KPR2004b] 439, Cl Mrk 39, LMH 24, OCISM 11[4]
Associations
Constellation
Serpens[5]
See also: Open cluster, List of open clusters
NGC 6604 is a young[6] open cluster of stars in the equatorial constellation of Serpens, positioned about 1.5° north of the Eagle Nebula (NGC 6611).[7] The cluster was discovered by William Herschel on July 15, 1784.[8] It is located at a distance of 4,580[2] light years from the Sun, about 210 ly (65 pc) above the galactic plane.[7] NGC 6604 forms the densest part of the Ser OB2 association of co-moving stars.[9]
This cluster is fairly compact with a Trumpler class of I3p,[6] and is still undergoing star formation.[10][7] It lies at the heart of an H II region with the identifier S54, and the two are most likely linked.[6] The cluster has an estimated age of 6.5[1] million years and contains several massive stars of the OB type.[6] One of these is the high mass triple star system HD 167971, which includes the over-contact eclipsing binary MY Ser. It is one of the most luminous stars in the galaxy.[10] HD 168112 is another colliding-wind binary in the cluster; both systems are over-luminous in their X-ray emission.[11]
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NGC6604 is a young open cluster of stars in the equatorial constellation of Serpens, positioned about 1.5° north of the Eagle Nebula (NGC 6611). The cluster...
system consisting of three very hot O-type stars. A member of the cluster NGC6604, the two eclipsing stars are both blue giants, with one being of the very...
doi:10.1086/190049. Reipurth, B. (December 2008). "The Young Cluster NGC6604 and the Serpens OB2 Association". Handbook of Star Forming Regions, Volume...
telescopes. IC 4756 is also known as the Tweedledee Cluster (paired with NGC 6633 as Tweedledum), also as the Secret Garden Cluster. Metallicity of IC...
the constellation Serpens. NGC 6027 NGC 6027a NGC 6027b NGC 6027c NGC 6027d "NASA/IPAC Extragalactic Database". Results for NGC 6027e. Retrieved 2007-04-18...
constellation Serpens. NGC 6027 NGC 6027a NGC 6027c NGC 6027d NGC 6027e Seyfert's Sextet "NASA/IPAC Extragalactic Database". Results for NGC 6027b. Retrieved...
constellation Serpens. NGC 6027 NGC 6027a NGC 6027b NGC 6027d NGC 6027e Seyfert's Sextet "NASA/IPAC Extragalactic Database". Results for NGC 6027c. Retrieved 2007-04-17...
in NGC 6027d: SN 1998fe (type unknown, mag. 18). NGC 6027 NGC 6027a NGC 6027b NGC 6027c NGC 6027e "NASA/IPAC Extragalactic Database". Results for NGC 6027d...
Embedded within Messier 24. Associated with Messier 17. Associated with NGC 6820. Embedded within the Iris Nebula. There are some errors in Collinder's...
observers on Earth. NGC 6027 NGC 6027b NGC 6027c NGC 6027d NGC 6027e Seyfert's Sextet "NASA/IPAC Extragalactic Database". Results for NGC 6027a. Retrieved...
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