Delta3 Tauri

δ³ Tauri

File:HyadesStarMap.jpg Location of δ3 Tauri in the Hyades, indicated by its Flamsteed designation 68
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Taurus
Right ascension	Template:RA
Declination	Template:DEC
Apparent magnitude (V)	+4.32 (4.35 + 8.37)
Characteristics
Spectral type	A2IV-Vs
Astrometry
Proper motion (μ)	RA: +41.91 mas/yr Dec.: −34.54 mas/yr
Parallax (π)	21.96±0.51 mas
Distance	Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)	+1.14
Details
Mass	Template:Val Template:Solar mass
Radius	2.4 Template:Solar radius
Luminosity	29.5 Template:Solar luminosity
Surface gravity (log g)	3.95 cgs
Temperature	9,025 K
Metallicity [Fe/H]	+0.32 dex
Rotation	2.13 days
Rotational velocity (v sin i)	11.3 km/s
Age	630 Myr
Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
Template:Odlist
Database references
SIMBAD	data

Delta³ Tauri (δ³ Tauri) is a binary star system in the zodiac constellation of Taurus. Based upon an annual parallax shift of 21.96 mas as seen from Earth, it is located roughly 149 light years distant from the Sun. It is visible to the naked eye with a combined apparent visual magnitude of +4.32. δ³ Tauri is separated from δ¹ Tauri by 0.72° on the sky. This star also has the traditional Latin name Cleeia, from the Greek Kleeia (transliteration of Κλεεια), who was one of the Hyades sisters. It is considered a member of the Hyades cluster.

In Chinese, (), meaning Net, refers to an asterism consisting δ³ Tauri, ε Tauri, δ¹ Tauri, γ Tauri, Aldebaran, 71 Tauri and λ Tauri. Consequently, the Chinese name for δ³ Tauri itself is (), "the Second Star of Net".

The magnitude 4.35 primary, component A, appears to be an A-type star intermediate between main sequence and subgiant, with a stellar classification of A2 IV-Vs. The "s" indicates sharp (unusually narrow) absorption lines, a sign of slow rotation. It is a candidate blue straggler and shows characteristics of an Am star. Abt (1985) gave it a classification of A2kA3hA5m, indicating that the spectrum displays the calcium K-line of an A2 star, the hydrogen lines of an A3 star and the metal lines of an A5 star. It is deficient in scandium but has enhanced iron peak and heavy elements. Although suspected of variability in the past, Delta³ Tauri A was subsequently determined to be photometrically constant.

The companion, component B, is a magnitude 8.37 star at an angular separation of 1.80 arc seconds along a position angle of 341°, as of 2010. At 77 arcseconds away (as of 2006) is a magnitude 11.12 visual companion, designated component C.