| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius[1] |
| Right ascension | 23h 29m 32.08207s[2] |
| Declination | −04° 31′ 57.8915″[2] |
| Apparent magnitude (V) | 6.26[3] |
| Characteristics | |
| Spectral type | K3IIIv[4] |
| U−Bcolor index | +1.20[3] |
| B−Vcolor index | +1.10[3] |
| Astrometry | |
| Radial velocity (Rv) | −26.53±1.94[4] km/s |
| Proper motion (μ) | RA: +181.03[2]mas/yr Dec.: −232.23[2]mas/yr |
| Parallax (π) | 21.14±0.56 mas[2] |
| Distance | 154 ± 4 ly (47 ± 1 pc) |
| Absolute magnitude (MV) | +2.89[1] |
| Details | |
| Radius | 5[4] R☉ |
| Luminosity | 8.9[4] L☉ |
| Surface gravity (log g) | 3.1[4] cgs |
| Temperature | 4,592[4] K |
| Metallicity[Fe/H] | +0.11[4] dex |
| Rotational velocity (v sin i) | 2.2[4] 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 suspectedvariable star in the equatorialconstellation ofAquarius. The spectrum of the star shows exceptionally strong levels ofCN; one of the highest cyanogen indices measured.[5]
{{citation}}: CS1 maint: postscript (link)| Stars |
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