ι Tauri

Location of ι Tauri (circled)
Observation data Epoch J2000       Equinox J2000
Constellation	Taurus
Right ascension	05 h 03 m 05.74725 s [1]
Declination	21° 35′ 23.8627″ [1]
Apparent magnitude  (V)	4.62 [2]
Characteristics
Spectral type	A7 V [3]
U?B color index	+0.15 [4]
B?V color index	+0.16 [4]
Astrometry
Radial velocity (R v )	+38.30 [5]  km/s
Proper motion (μ)	RA:  +68.88 [1]   mas / yr Dec.:  -41.06 [1]   mas / yr
Parallax (π)	18.88 ± 0.30  mas [1]
Distance	173 ± 3  ly (53.0 ± 0.8  pc )
Absolute magnitude  (M V )	1.00 [2]
Details
Mass	2.22 [6]   M ☉
Radius	2.6 [7]   R ☉
Luminosity	36 [6]   L ☉
Surface gravity (log  g )	3.97 [8]   cgs
Temperature	8,054 [6]   K
Metallicity [Fe/H]	+0.15 [2]   dex
Rotational velocity ( v  sin  i )	131 [6]  km/s
Age	717 [8]   Myr
Other designations
ι Tau , 102 Tauri , BD +21° 751 , FK5  184, GC  6158, HD  32301, HIP  23497, HR  1620, SAO  76920, WDS J05031+2135AB , GSC  01293-02747
Database references
SIMBAD	data

Iota Tauri , Latinized from ι Tauri, is a white-hued star in the zodiac constellation Taurus and an outlying member of the Hyades star cluster . ^[9] It is visible to the naked eye with an apparent visual magnitude of 4.62, ^[2] and is located at an estimated distance of about 173  light years based upon parallax measurements . ^[1] The star is moving away from the Sun with a radial velocity of +38 km/s. ^[5]

This has been reported as a double star with two components at separation 0.1", both of type A7V and magnitude 5.4. ^{[10] [11]} The combined spectrum matches a stellar classification of A7 V, ^[3] which would normally indicate an A-type main-sequence star that is generating energy through hydrogen fusion at its core . It has an estimated age of 717 ^[8]  million years.

References [ edit ]