T Antliae

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T Antliae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Antlia
Right ascension 09h 33m 50.86s
Declination −36° 36′ 56.8″
Apparent magnitude (V) 9.27
Spectral type F6 Iab
Variable type Cepheid
Distance 7498 ly
(2300 pc)
Mass 3? / 0.7 M
Rotation ~9 km/s
Age ~79 Million years
Other designations
T Ant.

T Antliae (also abbreviated T Ant) is a Cepheid variable star 2.3 kiloparsecs away from the Sun in the constellation of Antlia. A yellow-white supergiant with a spectral type of F6Iab, it ranges between apparent magnitude 8.88 and 9.82 over a period of 5.89820 days.[1]

Stellar system[edit]

The F-type supergiant also forms a binary system with an unseen stellar companion with putative mass of 70% Solar mass. Such a stellar component could likely take 42.4 years to complete its orbit around the Cepheid (semimajor axis around 10.8 Astronomical Units).[2]


  1. ^ Watson, Christopher (4 January 2010). "T Antliae". AAVSO Website. American Association of Variable Star Observers. Retrieved 25 July 2014. 
  2. ^ Turner, D. G. & Berdnikov, L. N. (2003). "The nature of the Cepheid T Antliae". Astronomy and Astrophysics. 407 (1): 325–34. Bibcode:2003A&A...407..325T. doi:10.1051/0004-6361:20030835. 

Coordinates: Sky map 09h 33m 50.86s, −36° 36′ 56.8″