HD 33636
HD 33636 is a binary system located approximately 94 light-years away in Orion constellation. The visible member HD 33636 A is a 7th magnitude yellow main-sequence star. It is located at a distance of 91.6 light years from Earth. It has a metallicity of −0.05 ± 0.07.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 11m 46.448s |
| Declination | +04° 24′ 12.73″ |
| Characteristics | |
| Spectral type | G0VH-03 / M6V |
| B−V color index | 0.588 ± 0.016 / ? |
| Astrometry | |
| Proper motion (μ) | RA: 169.0 ± 0.3 mas/yr Dec.: -142.3 ± 0.3 mas/yr |
| Parallax (π) | 35.6 ± 0.2 mas |
| Distance | 91.6 ± 0.5 ly (28.1 ± 0.2 pc) |
| Absolute magnitude (MV) | 4.77 / ? |
| Orbit | |
| Companion | HD 33636 B |
| Period (P) | 5.797 ± 0.002 yr |
| Semi-major axis (a) | 14.2 ± 0.2 AU |
| Inclination (i) | 4.1 ± 0.1° |
| Details | |
| Mass | 1.01 ± 0.02/ ? M☉ |
| Radius | 0.97 ± 0.01/ ? R☉ |
| Luminosity | 1.08 ± 0.003/ ? L☉ |
| Surface gravity (log g) | 4.46 ± 0.02/ ? cgs |
| Temperature | 5979 ± 28/ ? K |
| Age | 2.5 ± 1.1 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
A companion was discovered in 2002 with a minimum mass of planet size. This was ascertained to be a low-mass star in 2007, making it HD 33636 B.
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