Tau2 Hydrae
| Observation data ICRS )
| |
|---|---|
| Constellation | Hydra |
| Right ascension | 09h 31m 58.92729s[1] |
| Declination | −01° 11′ 04.7899″[1] |
| Apparent magnitude (V) | +4.56[2] |
| Characteristics | |
| Spectral type | A3 V[3] |
| U−B color index | +0.06[2] |
| B−V color index | +0.11[2] |
| Variable type | Suspected[4] |
| Absolute magnitude (MV) | −1.43[6] |
| Details | |
Rotational velocity (v sin i) | 54.0±0.6[3] km/s |
| Database references | |
| SIMBAD | data |
Tau2 Hydrae is a probable
apparent visual magnitude of +4.56.[2]
The primary member, component A, is an
A-type main sequence star with a stellar classification of A3 V.[3] It is a suspected variable of unknown type, with an amplitude of 0.06 in visual magnitude.[4] The star has around 4.5[7] times the radius of the Sun and is radiating about 285 times the solar luminosity from its photosphere at an effective temperature of 7,918 K.[8]
References
- ^ S2CID 18759600.
- ^ Bibcode:1986EgUBV........0M.
- ^ S2CID 119286673.
- ^ Bibcode:2000IBVS.4969....1A.
- S2CID 59451347, A61.
- S2CID 119257644.
- ^ S2CID 425754.
- ^ S2CID 118665352.
- ^ "* tau02 Hya". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-03-22.
{{cite web}}: CS1 maint: postscript (link) - S2CID 14878976.