HD 7449
HD 7449 is a binary star system about 126 light-years way. The primary star, HD 7449 A, is a main-sequence star belonging to the spectral class F9.5. It is younger than the Sun. The primary star is slightly depleted of heavy elements, having 80% of solar abundance.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 01h 14m 29.32229s |
| Declination | −05° 02′ 50.6148″ |
| Apparent magnitude (V) | 7.50 |
| Characteristics | |
| Spectral type | F9.5V + M4.5 |
| B−V color index | 0.575±0.007 |
| Astrometry | |
| Radial velocity (Rv) | −19.60±0.13 km/s |
| Proper motion (μ) | RA: −164.544±0.039 mas/yr Dec.: −134.382±0.028 mas/yr |
| Parallax (π) | 25.9132 ± 0.0287 mas |
| Distance | 125.9 ± 0.1 ly (38.59 ± 0.04 pc) |
| Absolute magnitude (MV) | 4.55 |
| Orbit | |
| Primary | HD 7449 A |
| Companion | HD 7449 B |
| Period (P) | 175.310+43.633 −34.380 yr |
| Semi-major axis (a) | 34.655+5.498 −4.781 AU |
| Eccentricity (e) | 0.301+0.084 −0.102 |
| Inclination (i) | 68.400+4.103 −3.887° |
| Longitude of the node (Ω) | 325.935+2.865 −2.404° |
| Periastron epoch (T) | 2391480.709+12803.765 −15269.796 |
| Argument of periastron (ω) (secondary) | 201.186+12.830 −13.166° |
| Semi-amplitude (K1) (primary) | 0.720525+0.043724 −0.029891 km/s |
| Details | |
| HD 7449 A | |
| Mass | 1.05±0.02 M☉ |
| Radius | 1.02±0.02 R☉ |
| Luminosity | 1.26±0.02 L☉ |
| Surface gravity (log g) | 4.44±0.02 cgs |
| Temperature | 6060±42 K |
| Metallicity | −0.11±0.01 |
| Age | 2.2±1.3 Gyr |
| HD 7449 B | |
| Mass | 0.23+0.22 −0.05 M☉ |
| Mass | 178.151+16.614 −13.664 MJup |
| Temperature | 3000 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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