HL Tau 76
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 18m 56.46s |
| Declination | +27° 17′ 51.4″ |
| Apparent magnitude (V) | 14.1–15.28 |
| Characteristics | |
| Spectral type | DAV5 |
| B−V color index | 0.2 |
| Variable type | DAV (ZZ Ceti) |
| Astrometry | |
| Proper motion (μ) |
RA: 66 mas/yr Dec.: −72 mas/yr |
| Other designations | |
|
EGGR 265, V411 Tau, WD 0416+272
|
|
| Database references | |
| SIMBAD | data |
HL Tau 76 is a variable white dwarf star of the DAV (or ZZ Ceti) type. It was observed by G. Haro and W. J. Luyten in 1961, and was the first variable white dwarf discovered when, in 1968, Arlo U. Landolt found that it varied in brightness with a period of approximately 749.5 seconds, or 12.5 minutes. Like other DAV white dwarfs, its variability arises from non-radial gravity wave pulsations within itself., § 7. Later observation and analysis has found HL Tau 76 to pulsate in over 40 independent vibrational modes, with periods between 380 seconds and 1390 seconds.
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