Delta Geminorum

Delta Geminorum
Location of δ Geminorum (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Gemini
Right ascension 07h 20m 07.37978s[1]
Declination +21° 58′ 56.3377″[1]
Apparent magnitude (V) +3.53[2]
Characteristics
Spectral type F0 IV[3]
U−B color index +0.04[2]
B−V color index +0.34[2]
Astrometry
Radial velocity (Rv)+4.1[4] km/s
Proper motion (μ) RA: –15.13[1] mas/yr
Dec.: –9.79[1] mas/yr
Parallax (π)53.94 ± 0.66 mas[1]
Distance60.5 ± 0.7 ly
(18.5 ± 0.2 pc)
Absolute magnitude (MV)1.95[5]
Details
Mass1.57[6] M☉
Temperature6,900[7] K
Metallicity [Fe/H]–0.26[7] dex
Rotational velocity (v sin i)129.7[8] km/s
Age1.6[7] Gyr
Other designations
Wasat, 55 Geminorum, BD+22° 1645, FK5 279, Gl 271, HD 56986, HIP 35550, HR 2777, SAO 79294.[3]
Database references
SIMBADdata

Delta Geminorum (δ Geminorum, abbreviated Delta Gem, δ Gem), formally named Wasat /ˈweɪsət/,[9][10] is a triple star system in the constellation of Gemini.

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