T Leporis
Star T Leporis |
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Interferometric image of the VLTI compared to the size of the orbit | |||||||||||||||||
AladinLite | |||||||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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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 |
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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 |
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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
- ↑ a b c d e f T Lep. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed December 4, 2018 .
- ↑ a b c T Lep. In: VSX. AAVSO, accessed December 4, 2018 .
- ↑ 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 .
- ↑ 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 .