Psi Serpentis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 44m 01.821s[1] |
| Declination | +02° 30′ 54.63″[1] |
| Apparent magnitude (V) | 5.879 |
| Characteristics | |
| Spectral type | ACE: G5V + K2 + G8III |
| U−B color index | 0.25 |
| B−V color index | 0.67 |
| Variable type | ? |
| Astrometry | |
| Radial velocity (Rv) | +14 km/s |
| Proper motion (μ) | RA: -43.11 ± 0.79[1] mas/yr Dec.: -143.57 ± 0.56[1] mas/yr |
| Parallax (π) | 68.22 ± 0.66[1] mas |
| Distance | 47.8 ± 0.5 ly (14.7 ± 0.1 pc) |
| Absolute magnitude (MV) | 5.05 |
| Details | |
| Age | 3.2 × 109[2] years |
| Other designations | |
Psi Serpentis (ψ Ser, ψ Serpentis) is a star system in the constellation Serpens. It is approximately 47.8 light years from Earth.
The primary component, Psi Serpentis A, is a yellow G-type main sequence dwarf with an apparent magnitude of +5.86. It has a close 12th magnitude companion, Psi Serpentis B, 4.2 arcseconds, or at least 60 AUs, distant.
When observed from 1997 through 2000, the primary star appeared to be transitioning from a maunder minimum state to a state of cycling magnetic activity.[3]
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry - ↑ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal. 687 (2): 1264–1293. arXiv:0807.1686. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.
- ↑ Hall, Jeffrey C.; Lockwood, G. W.; Skiff, Brian A. (March 2007), "The Activity and Variability of the Sun and Sun-like Stars. I. Synoptic Ca II H and K Observations", The Astronomical Journal, 133 (3): 862–881, Bibcode:2007AJ....133..862H, doi:10.1086/510356
External links
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