T Leporis

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Star
T Leporis
Interferometric image of the VLTI compared to the size of the orbit
Interferometric image of the VLTI compared to the size of the orbit
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Hare
Right ascension 05 h 04 m 50.85 s
declination -21 ° 54 ′ 16.5 ″
Apparent brightness 7.4 (7.4 to 14.3) mag
Typing
B − V color index (3.59) 
Spectral class M6e to M9e
Variable star type M. 
Astrometry
Radial velocity (−4.0 ± 4.7) km / s
parallax (2.96 ± 0.19)  mas
distance (1,100)  ly
(340)  pc
Proper movement 
Rec. Share: (9.71 ± 0.24)  mas / a
Dec. portion: (−34.32 ± 0.24)  mas / a
Physical Properties
radius 100  R ☉
Effective temperature 2800  K
Other names
and catalog entries
Bonn survey BD −22 ° 995
Cordoba Survey CD −22 ° 1987
Henry Draper Catalog HD 32803 [1]
Hipparcos catalog HIP 23636 [2]
SAO catalog SAO 170041 [3]
Tycho catalog TYC 5913-93-1 [4]Template: Infobox star / maintenance / specification of the TYC catalog
2MASS catalog 2MASS J05045084-2154163 [5]
Other names T Leporis, IRAS 05027-2158

T Leporis T (T Lep / HD 32803 / HIP 23636) is a variable star in the constellation Rabbit . It is located about 1100 light years from our solar system. The spectral type is M6ev, it is a Mira variable , the brightness of which varies between 7.4 and 14.3 mag with a period of 368 days; it has a surface temperature of 2800 K. The radius of the star was estimated to be 100 R ☉ based on the parallax measurements by Hipparcos (2007 Van Leeuwen Reduction) . However, since the more recent measurements with Gaia DR2 indicate a significantly lower parallax, this radius could be significantly larger again.

Web links

Commons : T Leporis  - collection of images, videos and audio files

Individual evidence

  1. ↑ a b c d e f T Lep. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed December 4, 2018 .
  2. ↑ a b c T Lep. In: VSX. AAVSO, accessed December 4, 2018 .
  3. ↑ Le Bouquin, J.-B. et al .: Pre-maximum spectro-imaging of the Mira star T Leporis with AMBER / VLTI . In: Astronomy & Astrophysics . 496, No. 1, 2009, pp. L1-L4. arxiv : 0902.3698 . bibcode : 2009A & A ... 496L ... 1L . doi : 10.1051 / 0004-6361 / 200811579 .
  4. ↑ a b García-Hernández et al .: Lithium and zirconium abundances in massive Galactic O-rich AGB stars . In: Astronomy & Astrophysics . 462, No. 2, 2007, pp. 711-730. arxiv : astro-ph / 0609106 . bibcode : 2007A & A ... 462..711G . doi : 10.1051 / 0004-6361: 20065785 .