HD 100307
Star in the constellation Hydra
From Wikipedia, the free encyclopedia
HD 100307 is a suspected variable star in the constellation of Hydra. Its apparent magnitude is 6.16,[2] but interstellar dust makes it appear 0.346 magnitudes dimmer than it should be.[6] It is located some 340 light-years (104 parsecs) away, based on parallax.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hydra |
| Right ascension | 11h 32m 23.28291s[1] |
| Declination | −26° 44′ 48.4974″[1] |
| Apparent magnitude (V) | 6.16[2] |
| Characteristics | |
| Spectral type | M2 III[3] |
| U−B color index | +1.99[4] |
| B−V color index | +1.67[4] |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | 34.50 ± 0.6[5] km/s |
| Proper motion (μ) | RA: −83.52[1] mas/yr Dec.: 19.85[1] mas/yr |
| Parallax (π) | 4.54±0.36 mas[1] |
| Distance | 720 ± 60 ly (220 ± 20 pc) |
| Details[6] | |
| Radius | 67.564 R☉ |
| Luminosity | 687.324 ± 72.169 L☉ |
| Temperature | 3598 ± 125 K |
| Other designations | |
| CD−26° 8620, HD 100307, HIP 56293, HR 4445, SAO 179969 | |
| 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.[6]
