Lambda Piscium
 Location of λ Piscium(circled) |
|
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Pisces |
| Right ascension | 23h 42m 02.8062s |
| Declination | +1° 46′ 48.147″ |
| Apparent magnitude (V) | 4.49 |
| Characteristics | |
| Spectral type | A7V |
| U−B color index | +0.07 |
| B−V color index | +0.21 |
| Astrometry | |
| Radial velocity (Rv) | +12.4 km/s |
| Proper motion (μ) |
RA: -129.55 mas/yr Dec.: -154.87 mas/yr |
| Parallax (π) | 32.38 ± 0.84 mas |
| Distance | 101 ± 3 ly (30.9 ± 0.8 pc) |
| Details | |
| Mass | 1.806 M☉ |
| Radius | 2.0403±0.0451 R☉ |
| Luminosity | 13.3897±0.1692 L☉ |
| Temperature | 7734±80 K |
| Age | 900 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Lambda Piscium (Lambda Psc, λ Piscium, λ Psc) is a star approximately 101 light years away from Earth in the constellation Pisces. It is a bluish-white star of A7V spectral classification, meaning it has a surface temperature of 7,500 to 11,000 kelvins. It is much brighter and hotter in surface temperature than the Sun, yet is approximately the same size. Lambda Piscium forms the southeast corner of the "Circlet" in Pisces.
In Chinese, 雲雨 (Yún Yǔ), meaning Cloud and Rain, refers to an asterism consisting of λ Piscium, κ Piscium, 12 Piscium and 21 Piscium. Consequently, λ Piscium itself is known as 雲雨四 (Yún Yǔ sì, English: the Fourth Star of Cloud and Rain.)
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