HD 29573 is a binary star[3] system in the constellation Eridanus. It has a combined apparent visual magnitude of 4.99,[2] making it visible to the naked eye. Based upon an annual parallax shift of 14.23 mas,[1] it is located 229 light years from the Sun. The system is moving further away from Earth with a heliocentric radial velocity of +3 km/s.[5]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Eridanus |
Right ascension | 04h 38m 53.55015s[1] |
Declination | −12° 07′ 23.0681″[1] |
Apparent magnitude (V) | 4.99[2] (5.19 + 7.22)[3] |
Characteristics | |
Spectral type | A0 V (A1 + F2)[2] |
B−V color index | 0.074±0.003[4] |
Astrometry | |
Radial velocity (Rv) | +2.9±0.8[5] km/s |
Proper motion (μ) | RA: −60.614[1] mas/yr Dec.: −16.417[1] mas/yr |
Parallax (π) | 14.2348 ± 0.3656 mas[1] |
Distance | 229 ± 6 ly (70 ± 2 pc) |
Absolute magnitude (MV) | 0.73[4] |
Orbit[2] | |
Period (P) | 40.9±1.386 yr |
Semi-major axis (a) | 0.2844±0.0055″ |
Eccentricity (e) | 0.759±0.180 |
Inclination (i) | 75.5±2.2° |
Longitude of the node (Ω) | 152.0±1.8° |
Periastron epoch (T) | 2003.805 |
Argument of periastron (ω) (secondary) | 284.1±11.0° |
Details | |
HD 29573 A | |
Mass | 2.28[2] M☉ |
Luminosity | 51.8+4.6 −4.3[6] L☉ |
Temperature | 8,892+103 −102[6] K |
Rotational velocity (v sin i) | 27[6] km/s |
HD 29573 B | |
Mass | 1.56[2] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
The binary nature of this system was discovered through observations made with the Hipparcos spacecraft. The pair orbit each other with a period of 41 years and an eccentricity of 0.8.[2] The magnitude 5.19[3] primary component has a class of A1,[2] 2.28[2] times the mass of the Sun, and is a suspected chemically peculiar star.[8] The secondary has magnitude 7.22,[3] 1.56[2] times the Sun's mass, and a class of F2.[2] The system has a possible infrared excess[9] due to circumstellar dust.[10]