ZZ Ceti
Star ZZ Ceti |
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AladinLite | |||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | whale | ||||
Right ascension | 01 h 36 m 13.62 s | ||||
declination | −11 ° 20 ′ 32.6 ″ | ||||
Apparent brightness | (14.13 ± 0.03) mag | ||||
Typing | |||||
B − V color index | (0.17) | ||||
Spectral class | DA4.0 | ||||
Variable star type | ZZA | ||||
Astrometry | |||||
parallax | (30.52 ± 0.05) mas | ||||
distance | (106.8 ± 0.2) ly (32.8) pc |
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Proper movement | |||||
Rec. Share: | (460.85 ± 0.12) mas / a | ||||
Dec. portion: | (−116.45 ± 0.07) mas / a | ||||
Physical Properties | |||||
Dimensions | (0.65 ± 0.02) M ☉ | ||||
radius | (0.0118 ± 0.0002) R ☉ | ||||
Luminosity |
(0.0029 ± 0.0002) L ☉ |
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Effective temperature | (12281 ± 125) K. | ||||
Rotation time | (37.84 ± 1.99) h | ||||
Other names and catalog entries |
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ZZ Ceti (also Ross 548 ) is a white dwarf at a distance of just over 100 light years in the constellation Whale . It is the prototype of the so-called ZZ-Ceti stars due to its pulsations .
Individual evidence
- ↑ a b c d e ZZ Cet. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 14, 2018 .
- ↑ a b ZZ Cet. In: VSX. AAVSO, accessed September 14, 2018 .
- ^ A b c d e N. Giammichele, G. Fontaine, P. Brassard, S. Charpinet: A New Analysis of the Two Classical ZZ Ceti White Dwarfs GD 165 and Ross 548. II. Seismic Modeling . In: The Astrophysical Journal Supplement Series . 223, No. 1, 2016. bibcode : 2016ApJS..223 ... 10G . doi : 10.3847 / 0067-0049 / 223/1/10 .