V394 Aurigae Explained

V394 Aurigae is a semi-regular variable star in the constellation Auriga. Its brightness varies between magnitudes 6.01 and 6.11,^[1] so it is faintly visible to the naked eye under ideal observing conditions. Koen and Eyer found that the star's brightness, as seen by Hipparcos, varies with a period of 3.9 days.^[2] Located around 730 light-years distant, V394 Aurigae shines with a luminosity approximately 1075 times that of the Sun and has a surface temperature of 3589 K.^[3]

It is a double star: the secondary, designated V394 Aurigae B, is an eleventh-magnitude star with a separation of 10 arcseconds.^[4]

Notes and References

1. Web site: V394 Aurigae . Watson, Christopher . 4 January 2010 . The International Variable Star Index. American Association of Variable Star Observers. 14 August 2015.
2. Koen . Chris . Eyer . Laurent . New periodic variables from the Hipparcos epoch photometry . Monthly Notices of the Royal Astronomical Society . March 2002 . 331 . 1 . 45–59 . 10.1046/j.1365-8711.2002.05150.x . free . astro-ph/0112194 . 2002MNRAS.331...45K . 10505995 .
3. McDonald, I.. Zijlstra, A. A.. Boyer, M. L.. 2012. Fundamental Parameters and Infrared Excesses of Hipparcos Stars. Monthly Notices of the Royal Astronomical Society. 427. 1. 343–57. 2012MNRAS.427..343M. 1208.2037 . 10.1111/j.1365-2966.2012.21873.x . free . 118665352.
4. Dommanget . J. . Nys . O. . CCDM (Catalog of Components of Double & Multiple stars) (Dommanget+ 2002) . VizieR On-line Data Catalog: I/274. Originally Published in: Observations et Travaux 54 . 1274 . 2002 . 2002yCat.1274....0D. Vizier catalog entry