HD 100307
HD 100307 is a suspected variable star in the constellation of Hydra. Its apparent magnitude is 6.16, but interstellar dust makes it appear 0.346 magnitudes dimmer than it should be. It is located some 340 light-years (104 parsecs) away, based on parallax.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hydra |
| Right ascension | 11h 32m 23.28291s |
| Declination | −26° 44′ 48.4974″ |
| Apparent magnitude (V) | 6.16 |
| Characteristics | |
| Spectral type | M2 III |
| U−B color index | +1.99 |
| B−V color index | +1.67 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | 34.50 ± 0.6 km/s |
| Proper motion (μ) | RA: −83.52 mas/yr Dec.: 19.85 mas/yr |
| Parallax (π) | 4.54 ± 0.36 mas |
| Distance | 720 ± 60 ly (220 ± 20 pc) |
| Details | |
| Radius | 67.564 R☉ |
| Luminosity | 687.324 ± 72.169 L☉ |
| Temperature | 3598 ± 125 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 100307 is a M-type red giant. It has evolved from the main sequence to a radius of 67.6 times that of the Sun. It emits 687 times as much energy as the Sun at a surface temperature of 3,598 K.
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