 | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Orion |
| HD 43587 Aab | |
| Right ascension | 06h 17m 16.139s ± 3.26[1] |
| Declination | +05° 06′ 00.40″ ± 2.46[1] |
| Apparent magnitude (V) | 5.70 |
| HD 43587 BC | |
| Right ascension | 06h 17m 10.65s |
| Declination | +05° 07′ 02.4″ |
| Apparent magnitude (V) | 13.27 (BC total) |
| Characteristics | |
| Spectral type | G0V[2][3] / M0V[3][4] / M3.5V[5] / M5V[5] |
| B−V color index | 0.610[1](system total) |
| Astrometry | |
| HD 43587 Aa | |
| Radial velocity (Rv) | 8.96 ± 0.10[note 1] km/s |
| Proper motion (μ) | RA: -187.72 ± 0.37[1] mas/yr Dec.: 170.69 ± 0.28[1] mas/yr |
| Parallax (π) | 51.95 ± 0.40 mas[1] |
| Distance | 62.8 ± 0.5 ly (19.2 ± 0.1 pc) |
| HD 43587 BC | |
| Proper motion (μ) | RA: -198 mas/yr Dec.: 164 mas/yr |
| Parallax (π) | 55.2 ± 1.0 mas[5] |
| Distance | 59 ± 1 ly (18.1 ± 0.3 pc) |
| Absolute magnitude (MV) | 12.07 ± 0.07 / 14.90 ± 0.21 |
| Orbit[6] | |
| Primary | HD 43587 Aa |
| Companion | HD 43587 Ab |
| Period (P) | 32.07 years |
| Semi-major axis (a) | 0.598″ |
| Eccentricity (e) | 0.796 |
| Inclination (i) | 35.6° |
| Longitude of the node (Ω) | 163.1° |
| Periastron epoch (T) | 1998.05 |
| Argument of periastron (ω) (secondary) | 75.0° |
| Semi-amplitude (K1) (primary) | 4.323 ± 0.009[7] km/s |
| Position (relative to HD 43587 B)[5] | |
| Component | HD 43587 C |
| Epoch of observation | 2453376.0 |
| Angular distance | 366 ± 3 mas |
| Position angle | 158 ± 1° |
| Details | |
| Mass | 1.049 ± 0.016[2] / 0.67 ± 0.04[4][note 2] / 0.25 ± 0.06[5] / 0.12 ± 0.02[5] M☉ |
| Radius | 1.15 ± 0.01[2] R☉ |
| Surface gravity (log g) | 4.30 ± 0.01[2] cgs |
| Temperature | 5947 ± 17[2] K |
| Metallicity [Fe/H] | -0.02 ± 0.02[2] dex |
| Age | 4.97 ± 0.52[2] Gyr |
| Other designations | |
HIP 29860, Gliese 231.1, HR 2251 | |
| HD 43587 Aab: WDS J06173+0506Aa,Ab, LEP 24A | |
| HD 43587 BC: NLTT 16333,[note 3] WDS J06173+0506E, LEP 24AE | |
| Database references | |
| SIMBAD | data |
HD 43587 is a stellar system approximately 63 light-years away in the constellation of Orion, visible to the naked eye. The system comprises four individual stars, with two widely separated binaries forming a quadruple system.
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