RT Aurigae

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RT Aurigae
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 28m 34.0889s
Declination +30° 29′ 34.921″
Apparent magnitude (V) 5.75
Spectral type F8Ibv
U−B color index 0.5
B−V color index 0.68
Variable type Cepheid variable
Radial velocity (Rv) 21.6 km/s
Proper motion (μ) RA: 0.34 mas/yr
Dec.: -14.95 mas/yr
Parallax (π) 2.09 ± 0.89 mas
Distance approx. 1,600 ly
(approx. 500 pc)
Absolute magnitude (MV) 6.49
Mass 1.7 M
Radius 1.4 R
Luminosity L
Temperature 6,000–7,500 K
Other designations
48 Aurigae, HD 45412, BD+30° 1238, HIP 30827, SAO 59128, HR 2332
Database references
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

RT Aurigae (RT Aur) is a star in the constellation Auriga.

RT Aurigae is a yellow-white F-type supergiant with a mean apparent magnitude of +5.75. It is approximately 1561 light-years from Earth. It is classified as a Cepheid variable star and its brightness varies from magnitude +5.00 to +5.82 with a period of 3.73 days.


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