Ross 548
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cetus |
| Right ascension | 01h 36m 13.60s[1] |
| Declination | −11° 20′ 32.2″[1] |
| Apparent magnitude (V) | 14.1[1] |
| Characteristics | |
| Spectral type | DAV4[2] |
| U−B color index | -0.5[2] |
| B−V color index | 0.2[2] |
| Variable type | DAV (ZZ Ceti)[2] |
| Astrometry | |
| Proper motion (μ) | RA: 454[1] mas/yr Dec.: -120[1] mas/yr |
| Parallax (π) | 13 ± 2[3] mas |
| Distance | approx. 250 ly (approx. 80 pc) |
| Other designations | |
ZZ Ceti, ZZ Cet, EGGR 10, G 271-106, G 272-52, LTT 873, NLTT 5358, WD 0133-116 | |
Ross 548 is a variable white dwarf star of the DAV type. It was found to be variable in 1970;[4] in 1972, it was given the variable star designation ZZ Ceti,[5] which also refers to the entire class of DAV variable white dwarfs.[6], pp. 891, 895.
References
- 1 2 3 4 5 Improved Astrometry and Photometry for the Luyten Catalog. II. Faint Stars and the Revised Catalog, Samir Salim and Andrew Gould, Astrophysical Journal 582, #2 (January 2003), pp. 1011–1031; CDS ID J/ApJ/582/1011.
- 1 2 3 4 A Catalog of Spectroscopically Identified White Dwarfs, George P. McCook and Edward M. Sion, Astrophysical Journal Supplement 121, #1 (March 1999), pp. 1–130. CDS ID III/210.
- ↑ Table 1, Summary of U.S. Naval Observatory parallaxes, R. S. Harrington and C. C. Dahn, Astronomical Journal 85 (April 1980), pp. 454–465.
- ↑ High-Frequency Stellar Oscillations. VI. R548, a Periodically Variable White Dwarf, Barry M. Lasker and James E. Hesser, Astrophysical Journal 163 (February 1971), pp. L89–L93.
- ↑ 58th Name-List of Variable Stars, B. V. Kukarkin, P. N. Kholopov, N. P. Kukarkina, N. B. Perova, Information Bulletin on Variable Stars, #717, September 21, 1972.
- ↑ Physics of white dwarf stars, D. Koester and G. Chanmugam, Reports on Progress in Physics 53 (1990), pp. 837–915.
Coordinates: 
01h 36m 13.60s, −11° 20′ 32.2″
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