HD 33636
Binary star system in the constellation Orion / From Wikipedia, the free encyclopedia
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.
Quick Facts Observation data Epoch J2000.0 Equinox J2000.0, Constellation ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Orion |
Right ascension | 05h 11m 46.448s[1] |
Declination | +04° 24′ 12.73″[1] |
Characteristics | |
Spectral type | G0VH-03 / M6V |
B−V color index | 0.588 ± 0.016 / ?[2] |
Astrometry | |
Proper motion (μ) | RA: 169.0 ± 0.3[3] mas/yr Dec.: -142.3 ± 0.3[3] mas/yr |
Parallax (π) | 35.6 ± 0.2 mas[3] |
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[3] yr |
Semi-major axis (a) | 14.2 ± 0.2 AU |
Inclination (i) | 4.1 ± 0.1° |
Details | |
Mass | 1.01 ± 0.02[4]/ ? M☉ |
Radius | 0.97 ± 0.01[4]/ ? R☉ |
Luminosity | 1.08 ± 0.003[4]/ ? L☉ |
Surface gravity (log g) | 4.46 ± 0.02[4]/ ? cgs |
Temperature | 5979 ± 28[4]/ ? K |
Age | 2.5 ± 1.1[4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Close
A companion was discovered in 2002 with a minimum mass of planet size.[2][5] This was ascertained to be a low-mass star in 2007, making it HD 33636 B.[3]