HD_177809 Knowpia

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
Characteristics
Spectral type	M2III
B−V color index	+1.549
Astrometry
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
Distance	approx. 700 ly ; (approx. 230 pc)
Other designations
	HD 177809, HR 7238, BD+30°3409, SAO 67781, HIP 93720, GC 26264
Database references
SIMBAD	data

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 the Sun, it is much larger and brighter, but its surface is cooler.^[1]

References edit

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

[a-1] "Simbad Query Result". Simbad. Retrieved October 17, 2007.

[1]

Summary

References edit