Psi Serpentis
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Serpens |
| Right ascension | 15h 44m 01.8197s |
| Declination | +02° 30′ 54.624″ |
| 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: -44.96 mas/yr Dec.: -144.73 mas/yr |
| Parallax (π) | 68.16 ± 0.87 mas |
| Distance | 47.9 ± 0.6 ly (14.7 ± 0.2 pc) |
| Absolute magnitude (MV) | 5.05 |
| Other designations | |
Psi Serpentis (ψ Ser / ψ Serpentis) is a star system in the constellation Serpens. It is approximately 47.9 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 Astronomical Units, distant.
Orbiting this pair with a separation of 3.5 arcminutes is the +8.8 magnitude K-type Psi Serpentis C. Slightly closer, at a distance of 2.9 arcminutes, is the +10.4 magnitude Psi Serpentis D. The brightest companion, Psi Serpentis E, a magnitude +7.1 G-type giant, is also the most distant, being separated from the primary by 5.9 arcminutes, or at least 5200 Astronomical Units.[citation needed]
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