HR 830

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HR 830
Observation data
Epoch J2000      Equinox J2000
Constellation Aries
Right ascension 02h 48m 45.9043s
Declination +25° 11′ 17.029″
Apparent magnitude (V) 5.89
Spectral type A0V[1]
U−B color index -0.14[1]
B−V color index -0.04[1]
Variable type Alpha² CVn variable[2]
Radial velocity (Rv) 13.8[1] km/s
Proper motion (μ) RA: 54.41 mas/yr
Dec.: -3.69 mas/yr
Parallax (π) 8.21 ± 0.65[1] mas
Distance 400 ± 30 ly
(122 ± 10 pc)
Other designations
VZ Arietis, SAO 75588, BD+24°396, HIP 13121, HR 830, HD 17471
Database references
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

HR 830, also known as VZ Arietis, is an Alpha2 Canum Venaticorum variable star in the constellation Aries. Varying between magnitudes 5.82 and 5.89,[2] the star can be easily seen with the naked eye in dark, unpolluted areas. Located approximately 122 parsecs (400 ly) distant and with a spectral type of A0V,[1] the star is a blue-white star currently fusing hydrogen into helium in its core. The star was formerly known as 16 Trianguli, but as the star is no longer in the constellation Triangulum, this designation has fallen out of use.[3]


  1. ^ a b c d e f "VZ Arietis". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 15 June 2014. 
  2. ^ a b VSX (4 January 2010). "VZ Arietis". AAVSO Website. American Association of Variable Star Observers. Retrieved 15 June 2014. 
  3. ^ Wagman, M. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy, Vol.18, NO. 3/AUG, P.209, 1987. 18: 222. Bibcode:1987JHA....18..209W.