Delta Leonis
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation | Leo |
| Right ascension | 11h 14m 06.5s |
| Declination | +20° 31′ 25.4″ |
| Apparent magnitude (V) | 2.56 |
| Spectral Characteristics | |
| Spectral type | A4 V |
| U-B color index | 0.12 |
| B-V color index | 0.12 |
| Variable type | Delta Scuti? |
| Astrometry | |
| Radial velocity (Rv) | -20.2 km/s |
| Proper motion (μ) | RA: 143.31 mas/yr Dec.: -130.43 mas/yr |
| Parallax (π) | 56.52 ± 0.83 mas |
| Distance | 57.7 ly (17.69 pc) |
| Absolute magnitude (MV) | 1.29 |
| Physical Characteristics | |
| Mass | 2.2 M☉ |
| Radius | 2 R☉ |
| Luminosity | 23 L☉ |
| Temperature | 8350 K |
| Metallicity | ? |
| Rotation | 180 km/s. (1/2 day) |
| Age | 6-7.5 × 108 years |
| Other designations | |
Delta Leonis (δ Leo / δ Leonis) is a star in the constellation of Leo. It also has traditional names Zosma (or Zozma) or Duhr.
Zosma is a relatively ordinary main sequence star, although it is somewhat larger and hotter than the Sun. It is a fairly well-studied star, allowing for relatively accurate measurements of its age and size. Having a larger mass than the Sun it will have a shorter lifespan, and in another 600 million years or so will swell into an orange or red giant star before decaying quietly into a white dwarf.
[edit] External links
- Delta Leonis, Prof. Jim Kaler, University of Illinois
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