YZ Ceti: Difference between revisions
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'''YZ Ceti''' is a [[red dwarf]] [[star]] in the [[constellation]] [[Cetus]]. Although it is relatively close to the [[Sun]] at just 12 [[light year]]s,<ref name="hipparcos"/> this star |
'''YZ Ceti''' is a [[red dwarf]] [[star]] in the [[constellation]] [[Cetus]]. Although it is relatively close to the [[Sun]] at just 12 [[light year]]s,<ref name="hipparcos"/> 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.{{Fact|date=May 2008}} |
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This star is unusually close to [[Tau Ceti]], a star of [[spectral class]] G8. The two are only about 1.6 light years apart,<ref>[http://www.solstation.com/stars/tau-ceti.htm Page of Tau Ceti], see the chapter of ''Closest Neighbors'', for YZ Ceti.</ref> a little more than a third of the distance from the Sun to our nearest neighbor, [[Proxima Centauri]]. |
This star is unusually close to [[Tau Ceti]], a star of [[spectral class]] G8. The two are only about 1.6 light years apart,<ref>[http://www.solstation.com/stars/tau-ceti.htm Page of Tau Ceti], see the chapter of ''Closest Neighbors'', for YZ Ceti.</ref> a little more than a third of the distance from the Sun to our nearest neighbor, [[Proxima Centauri]]. |
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Revision as of 02:09, 5 August 2011
 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 mas[1] |
| Distance | 12.0 ± 0.4 ly (3.7 ± 0.1 pc) |
| Absolute magnitude (MV) | 14.25 |
| Other designations | |
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.
References
- ^ a b c d e f van Leeuwen, F. (2007). "HIP 5643". Hipparcos, the New Reduction. Retrieved 2010-08-22.
- ^ Page of Tau Ceti, see the chapter of Closest Neighbors, for YZ Ceti.
See also
External links
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