HD 221148
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 23h 29m 32.08207s |
| Declination | −04° 31′ 57.8915″ |
| Apparent magnitude (V) | 6.26 |
| Characteristics | |
| Spectral type | K3IIIv |
| U−B color index | +1.20 |
| B−V color index | +1.10 |
| Astrometry | |
| Radial velocity (Rv) | −26.53±1.94 km/s |
| Proper motion (μ) | RA: +181.03 mas/yr Dec.: −232.23 mas/yr |
| Parallax (π) | 21.14±0.56 mas |
| Distance | 154 ± 4 ly (47 ± 1 pc) |
| Absolute magnitude (MV) | +2.89 |
| Details | |
| Radius | 5 R☉ |
| Luminosity | 8.9 L☉ |
| Surface gravity (log g) | 3.1 cgs |
| Temperature | 4,592 K |
| Metallicity [Fe/H] | +0.11 dex |
| Rotational velocity (v sin i) | 2.2 km/s |
| Other designations | |
| BD−05°5999, FK5 3881, HD 221148, HIP 115953, HR 8924, LTT 9560, SAO 146736 | |
| Database references | |
| SIMBAD | data |
HD 221148 is suspected variable star in the equatorial constellation of Aquarius. The spectrum of the star shows exceptionally strong levels of CN; one of the highest cyanogen indices measured.