| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Corvus |
| Right ascension | 11h 53m 15.905s[1] |
| Declination | −23° 09′ 53.67″[1] |
| Apparent magnitude (V) | 15.12[2] |
| Characteristics | |
| Evolutionary stage | Post-AGB Star |
| Spectral type | B5[2] |
| U−B color index | -0.63[3] |
| B−V color index | -0.09 |
| Astrometry | |
| Proper motion (μ) | RA: −1.298[1] mas/yr Dec.: −1.065[1] mas/yr |
| Parallax (π) | −0.0012 ± 0.0375 mas[1] |
| Distance | 17,329[1] pc |
| Details | |
| Mass | 0.55[2] M☉ |
| Radius | 4.0[1] R☉ |
| Luminosity | 1,222[1] L☉ |
| Surface gravity (log g) | 2.6[2] cgs |
| Temperature | 15,500[2] K |
| Metallicity [Fe/H] | −1.40[1] dex |
| Rotational velocity (v sin i) | ≤10[2] km/s |
| Other designations | |
2MASS J11531589-2309536 | |
| Database references | |
| SIMBAD | data |
EC 11507-2253 is a post-AGB star located about 81,000 light years, or 25 kpc, away from Earth in the constellation of Corvus. Located in the distant galactic halo, over 50,000 light years above the galactic plane, EC 11507-2253 is very isolated and the rest of its life (likely only a few tens of thousands of years) will be spent in the halo as well, far from much of the stellar population. The apparent magnitude is only about 15, and it was only discovered in 1997 in a survey for blue objects at high latitudes (above the galactic plane).[3]
dr3 was invoked but never defined (see the help page).lynn was invoked but never defined (see the help page).kilkenny was invoked but never defined (see the help page).