HD 177809

HD 177809^[1]
Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Lyra
Right ascension	19h 4m 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 (R_v)	-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, GSC 02640-01176

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]

References

1 2 "Simbad Query Result". Simbad. Retrieved October 17, 2007.

Stars of Lyra

Bayer	α (Vega) β (Sheliak) γ (Sulafat) δ¹ δ² ε^{1, 2} (Double Double) ζ¹ ζ² η (Aladfar) θ ι κ λ μ (Alathfar) ν¹ ν²

Flamsteed	16 17 19

Variable	R (13) S T V W RR RV RZ TT TZ UZ XY AY CC CN CY DM EP EZ FL HK HP HR KX MV V344 V361 V404 V473 V477 V478 V533 V542 V543 V545 V550 V558

HR	6845 6847 6853 6901 6968 6984 6997 7016 7017 7019 7030 7033 7041 7043 7044 7064 7073 7081 7112 7115 7118 7132 7140 7146 7162 7181 7202 7204 7212 7237 7238 7244 7253 7272 7280 7284 7302 7338 7345 7346 7359 7376 7382

HD	177830 180314 181068

Gliese	Gliese 758 GJ 4063

Kepler	7 8 9 14 19 20 24 25 26 30 37 38 46 53 55 59 60 62 65 75 83 88 91 92 93 94 95 98 100 102 103 104 105 109 128 130 131 138 177 238 277 279 282 350 410 444

Other	GSC 02634-01087 GSC 02652-01324 2MASS 1835+3259 WASP-3 WASP-58 WISE 1828+2650

List

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