Lambda Pavonis
 Location of λ Pavonis (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Pavo |
| Right ascension | 18h 52m 13.03427s |
| Declination | −62° 11′ 15.3324″ |
| Apparent magnitude (V) | 4.00 - 4.26 |
| Characteristics | |
| Spectral type | B2II–IIIe |
| U−B color index | -0.88 |
| B−V color index | -0.15 |
| Variable type | γ Cas |
| Astrometry | |
| Radial velocity (Rv) | +9.00 km/s |
| Proper motion (μ) |
RA: -1.86 mas/yr Dec.: -13.02 mas/yr |
| Parallax (π) | 2.28 ± 0.18mas |
| Distance | 1,400 ± 100 ly (440 ± 30 pc) |
| Absolute magnitude (MV) | -3.97 |
| Details | |
| Mass | 12.5 M☉ |
| Luminosity | 8450 L☉ |
| Temperature | 20,300 K |
| Rotational velocity (v sin i) | 190.0 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Lambda Pavonis (λ Pav), also known as HD 173948 or HIP 92609, is a star in the constellation Pavo. Its apparent magnitude is 4.21. It is a Be star, a rapidly rotating hot blue star which has developed a gas disk around it. It is a member of the Scorpius-Centaurus Association. It is a γ Cassiopeiae variable or shell star which has occasionally brightened to magnitude 4.0.
Variations in signals coming from Lambda Pavonis have led to debate on whether it is a binary, single or pulsating variable star.
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