Upsilon Serpentis
| Observation data ICRS )
| |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 47m 17.31882s[1] |
| Declination | +14° 06′ 55.2617″[1] |
| Apparent magnitude (V) | +5.70[2] |
| Characteristics | |
| Spectral type | A3 V[3] |
| U−B color index | +0.09[2] |
| B−V color index | +0.10[2] |
| Absolute magnitude (MV) | +1.30[5] |
| Details | |
Myr | |
| Database references | |
| SIMBAD | data |
Upsilon Serpentis,
apparent visual magnitude of +5.70.[2] It is a member of the Hyades group, a stream of stars that share a similar trajectory to the Hyades cluster.[11]
This is an
projected rotational velocity of 133 km/s.[9] It is radiating 23[8] times the solar luminosity from its photosphere at an effective temperature of 8,917 K.[6]
Upsilon Serpentis is a suspected
astrometric binary,[12] which means an undetected companion is perturbing the motion of the visible star. An X-ray emission has been detected from this system with a luminosity of 247.8×1020 W. This may be coming from the companion, since A-type stars are not expected to emit X-rays.[13]
References
- ^ S2CID 18759600.
- ^ Bibcode:1986EgUBV........0M.
- ^ doi:10.1086/110819.
- S2CID 59451347, A61.
- S2CID 119257644.
- ^ S2CID 119179065, 40.
- ^ S2CID 425754.
- ^ S2CID 118665352.
- ^ S2CID 18475298.
- ^ "phi Ser". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-03-23.
{{cite web}}: CS1 maint: postscript (link) - doi:10.1086/190826.
- S2CID 14878976.
- .