NGC 6709

NGC 6709
Observation data (J2000 epoch)
Right ascension18h 51m 20.6s[1]
Declination+10° 20′ 02″[1]
Distance3,510 ly (1,075 pc)[2]
Apparent magnitude (V)6.7
Apparent dimensions (V)13'
Physical characteristics
Radius26 ly[2] (tidal)
Estimated age141 Myr[2]
Other designationsNGC 6709, Cr 392[3]
Associations
ConstellationAquila
See also: Open cluster, List of open clusters

NGC 6709 is an open cluster of stars in the equatorial constellation of Aquila, some 5° to the southwest of the star Zeta Aquilae.[4] It is situated toward the center of the galaxy[5] at a distance of 3,510 light-years.[2]

This cluster has a Trumpler class of IV 2 m, and is considered moderately rich[5] with 305[6] member stars. It is around 141[2] million years old; about the same as the Pleiades.[6] The core radius of NGC 6709 is 2.2 ly (0.68 pc) and the tidal radius 26.4 ly (8.08 pc).[2] It contains two Be stars and one of them is a shell star. There is one candidate red giant member.[5]

On the evening of November 13, 1984, David H. Levy discovered his first comet less than a degree from this cluster.[7]

  1. ^ a b Cite error: The named reference Cantat-Gaudin_Anders_2020 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Dib_et_al_2018 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference simbad was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Crossen_Rhemann_2012 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Subramaniam_Sagar_1999 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Cole-Kodikara_et_al_2021 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Levy was invoked but never defined (see the help page).