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 | |
Database references | |
SIMBAD | data |
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]
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]