HD 177809

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
HD 177809[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lyra
Right ascension  19h 04m 58.2868s
Declination +30° 44′ 00.224″
Apparent magnitude (V) 6.096
Spectral type M2III
B−V color index +1.549
Radial velocity (Rv)-16 km/s
Proper motion (μ) RA: 21.82 mas/yr
Dec.: -21.53 mas/yr
Parallax (π)4.39 ± 0.60 mas
Distanceapprox. 700 ly
(approx. 230 pc)
Other designations
HD 177809, HR 7238, BD+30°3409, SAO 67781, HIP 93720, GC 26264
Database references

HD 177809 is a 6th magnitude star in the constellation Lyra, approximately 700 light years away from Earth. It is a red giant star of the spectral type M2III, meaning it possesses a surface temperature of under 3,500 kelvins. In comparison to our Sun, it is much larger and brighter, but its surface is cooler.[1]


  1. ^ a b "Simbad Query Result". Simbad. Retrieved October 17, 2007.