Iota Draconis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Draco |
| Right ascension | 15h 24m 55.77463s |
| Declination | +58° 57′ 57.8344″ |
| Apparent magnitude (V) | 3.290 |
| Characteristics | |
| Evolutionary stage | Red giant branch |
| Spectral type | K2III |
| U−B color index | +1.230 |
| B−V color index | +1.160 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | −10.71 km/s |
| Proper motion (μ) | RA: −8.36 mas/yr Dec.: +17.08 mas/yr |
| Parallax (π) | 32.23±0.10 mas |
| Distance | 101.2 ± 0.3 ly (31.03 ± 0.10 pc) |
| Absolute magnitude (MV) | 0.99±0.007 |
| Details | |
| Mass | 1.56±0.08 M☉ |
| Radius | 11.99±0.06 R☉ |
| Luminosity | 52.8±2.1 L☉ |
| Surface gravity (log g) | 2.52+0.007 −0.07 cgs |
| Temperature | 4,504±62 K |
| Metallicity [Fe/H] | +0.03±0.08 dex |
| Rotation | 434 days |
| Rotational velocity (v sin i) | 1.5 km/s |
| Age | 2.49+0.64 −0.62 Gyr |
| Other designations | |
| Edasich, Eldsich, 12 Draconis, BD+59 1654, FK5 425, FK5 571, HD 137759, HIP 75458, HR 5744, SAO 29520, 2MASS J15245578+5857577 | |
| Database references | |
| SIMBAD | data |
Iota Draconis (ι Draconis, abbreviated Iota Dra, ι Dra), also named Edasich /ˈɛdəsɪk/, is a star in the northern circumpolar constellation of Draco. A visually unremarkable star of apparent magnitude 3.3, in 2002 it was discovered to have a planet orbiting it (designated Iota Draconis b, later named Hypatia). From parallax measurements, this star is located at a distance of about 101.2 light-years (31.0 parsecs) from the Sun.