YZ Ceti

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YZ Ceti
YZ Ceti.png
Location of YZ Ceti, click for larger image.
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 01h 12m 30.64s [1]
Declination −16° 59′ 56.3″ [1]
Apparent magnitude (V) 12.10
Characteristics
Spectral type M4.5V
U−B color index 1.35
B−V color index 1.83
Variable type Flare star
Astrometry
Radial velocity (Rv) +28.2 km/s
Proper motion (μ) RA: 1208.53 ± 5.57 [1] mas/yr
Dec.: 640.73 ± 3.71 [1] mas/yr
Parallax (π) 271.01 ± 8.36[1] mas
Distance 12.0 ± 0.4 ly
(3.7 ± 0.1 pc)
Absolute magnitude (MV) 14.25
Other designations
GCTP 248.01, GJ 54.1, Gl 268-135, LHS 138, LTT 670, L 725-32, HIP 5643.

YZ Ceti is a red dwarf star in the constellation Cetus. Although it is relatively close to the Sun at just 12 light years,[1] this star cannot be seen with the naked eye. It is classified as a flare star that undergoes intermittent fluctuations in luminosity. YZ Ceti is only about 8.5% the mass of our Sun, and is normally less than 1/5,000th as luminous.[citation needed]

This star is unusually close to Tau Ceti, a star of spectral class G8. The two are only about 1.6 light years apart,[2] a little more than a third of the distance from the Sun to our nearest neighbor, Proxima Centauri.

See also[edit]

References[edit]

  1. ^ a b c d e f van Leeuwen, F. (2007). "HIP 5643". Hipparcos, the New Reduction. Retrieved 2010-08-22. 
  2. ^ Page of Tau Ceti, see the chapter of Closest Neighbors, for YZ Ceti.

External links[edit]