"Elnath", "Alnath", and "Nath (star)" redirect here. For other topics, see El Nath (disambiguation) and Nath (disambiguation).
Beta Tauri is the second-brightest star in the constellation of Taurus. It has the official name Elnath; Beta Tauri is the current Bayer designation, which is Latinised from β Tauri and abbreviated Beta Tau or β Tau. The original designation of Gamma Aurigae is now rarely used. It is a chemically peculiar B7 giant star, 134 light years away from the Sun with an apparent magnitude of 1.65.
β Tauri
Location of β Tauri in Taurus (circled)
Observation data Epoch J2000 Equinox J2000
Constellation
Taurus
Pronunciation
/ɛlˈnæθ/[1] or /ˈɛlnæθ/[2]
Right ascension
05h 26m 17.51312s[3]
Declination
+28° 36′ 26.8262″[3]
Apparent magnitude (V)
1.65[4]
Characteristics
Spectral type
B7III[5]
U−B color index
−0.49[4]
B−V color index
−0.13[4]
Astrometry
Radial velocity (Rv)
9.2[6] km/s
Proper motion (μ)
RA: +22.76[3] mas/yr Dec.: −173.58[3] mas/yr
Parallax (π)
24.36 ± 0.34 mas[3]
Distance
134 ± 2 ly (41.1 ± 0.6 pc)
Absolute magnitude (MV)
−1.42[7]
Details
Mass
5.0±0.1[8]M☉
Radius
4.82±0.34[9]R☉
Luminosity
564±20[10]L☉
Surface gravity (log g)
3.63[10] cgs
Temperature
13,600±100[9] K
Metallicity [Fe/H]
+0.2[10] dex
Rotational velocity (v sin i)
59[11] km/s
Age
100±10[8] Myr
Other designations
Elnath, El Nath, Alnath, Gamma Aurigae, 112 Tauri, BD+28°795, FK5 202, GC 6681, HD 35497, HIP 25428, HR 1791, SAO 77168, CCDM 05263+2836
Database references
SIMBAD
data
^"Alnath". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
^Cite error: The named reference Kunitzsch was invoked but never defined (see the help page).
^ abcdeCite error: The named reference hipparcos was invoked but never defined (see the help page).
^ abcCite error: The named reference ducati was invoked but never defined (see the help page).
^Cite error: The named reference garrison was invoked but never defined (see the help page).
^Cite error: The named reference rv was invoked but never defined (see the help page).
^Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
^ abCite error: The named reference apj736_2_89 was invoked but never defined (see the help page).
^ abCite error: The named reference gordon2019 was invoked but never defined (see the help page).
^ abcCite error: The named reference baines was invoked but never defined (see the help page).
^Cite error: The named reference hgmn was invoked but never defined (see the help page).
El Nath or Al Nath, may refer to: Alpha Arietis, a star BetaTauri, a star El-Nath, a town in the popular MMORPG, MapleStory Search for "elnath" , "alnath"...
in the constellation Auriga, and the Crab nebula and the bright star BetaTauri (Elnath) appear nearest this point. For binocular and telescope observers...
the constellation Taurus (the Bull) is designated α Tauri (abbreviated α Tau, pronounced Alpha Tauri), which means "Alpha of the Bull". Bayer used Greek...
system 1.64 1.59 Bellatrix Star 1.64 Gacrux Star 1.65 BetaTauri Star 1.69 1.64 Alnilam Star 1.69 Beta Carinae Star 1.71 1.69 Gamma Velorum Double star 1...
reference: BetaTauri (β Tauri). This star is located at around 8 degrees north-north-west of ζ Tauri. The Crab Nebula is south-south-east of β Tauri. Collins...
Balmer jump of two stars: Epsilon Orionis (O9.7 V) on the top and BetaTauri (B7 III) on the bottom. The vertical blue line represents the limit of the...
which consisted of Capella together with Beta Aurigae, Theta Aurigae and Iota Aurigae, as well as BetaTauri. Since it was the second star in this asterism...
magnitude of 4.547, and is located about 2/3 of the way from Capella toward BetaTauri. It also lies in the midst of the Melotte 31 cluster, but is merely a...
circumstellar disc of dense gas and dust surrounding a young newly formed star, a T Tauri star, or Herbig Ae/Be star. The protoplanetary disk may also be considered...
The T Tauri wind — so named because of the young star currently in this stage—is a phenomenon indicative of the phase of stellar development between the...
RV Tauri (RV Tau) is a star in the constellation Taurus. It is a yellow supergiant and is the prototype of a class of pulsating variables known as RV...
Beta Canum Venaticorum (β Canum Venaticorum, abbreviated Beta CVn, β CVn), also named Chara /ˈkɛərə/, is a G-type main-sequence star in the northern constellation...
EU Tauri is a variable star in the equatorial constellation of Taurus. With a brightness that cycles around an apparent visual magnitude of 8.07, it is...
star. Initially very hot, the disk later cools in what is known as the T Tauri star stage; here, formation of small dust grains made of rocks and ice is...
Algol /ˈælɡɒl/, designated Beta Persei (β Persei, abbreviated Beta Per, β Per), known colloquially as the Demon Star, is a bright multiple star in the...
Lambda Tauri (λ Tau, λ Tauri) is a triple star system in the constellation Taurus. In the Calendarium of Al Achsasi Al Mouakket, this star was designated...
visual magnitude varying between 10.2 and 10.8. It is likely to be an RV Tauri variable, an unstable post-AGB star losing mass before becoming a white...
The Beta Taurids (β–Taurids) are an annual meteor shower belonging to a class of "daytime showers" that peak after sunrise. The Beta Taurids are best observed...
molecular clouds (the Chamaeleon dark clouds) that are forming low-mass T Tauri stars. The cloud complex lies some 400 to 600 light years from Earth, and...
Structure of Late Type Giant Stars with IUE Application to Alpha-Tauri K5III and Beta-Gruis M5III", Monthly Notices of the Royal Astronomical Society,...
Global Information
