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HD 33283 is a star in the southern constellation Lepus with one planet and a co-moving stellar companion.[3] With an apparent visual magnitude of 8.05,[2] the star is too faint to be seen with the naked eye. It is located at a distance of 294 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +4.5.[2]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lepus |
| Right ascension | 05h 08m 01.0123s[1] |
| Declination | −26° 47′ 50.8941″[1] |
| Apparent magnitude (V) | 8.05[2] |
| Characteristics | |
| Spectral type | G3/5V[2] + M4–5[3] |
| B−V color index | 0.641±0.009[2] |
| Astrometry | |
| Radial velocity (Rv) | +4.51±0.19[2] km/s |
| Proper motion (μ) | RA: 56.184[1] mas/yr Dec.: −46.058[1] mas/yr |
| Parallax (π) | 11.0993 ± 0.0286 mas[1] |
| Distance | 293.9 ± 0.8 ly (90.1 ± 0.2 pc) |
| Absolute magnitude (MV) | 3.19[2] |
| Details | |
| HD 33283 | |
| Mass | 1.39±0.04 M☉[4] 1.24±0.1[5] M☉ |
| Radius | 1.95±0.04 R☉[4] 1.20±0.1[5] R☉ |
| Luminosity | 4.37±0.02[4] L☉ |
| Surface gravity (log g) | 3.99±0.03[4] cgs |
| Temperature | 5,985±57[4] K |
| Metallicity [Fe/H] | 0.35±0.08[2] dex |
| Rotational velocity (v sin i) | 1.09±0.26[6] km/s |
| Age | 3.6±0.6[4] Gyr |
| HD 33283 B | |
| Mass | 0.17[3] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an ordinary G-type main-sequence star with a stellar classification of G3/5V.[2] It is about 3.6 billion years old and is chromospherically inactive. The star is spinning slowly with a projected rotational velocity of 1 km/s[6] and an estimated rotation period of about 55.5 days.[5] It is larger and more massive than the Sun. HD 33283 is radiating over four times the luminosity of the Sun from its photosphere at an effective temperature of 5,985 K.[4]
In 2014, a co-moving red dwarf companion star, HD 33283 B, of spectral class M4–M5 was detected at an angular separation of 55.7″, corresponding to a projected separation of 5,244 AU.[3]
In 2006, J. A. Johnson and associates found a jovian planet orbiting HD 33283 with the radial velocity method.[5] It is orbiting at a distance of 0.15 AU (22 Gm) from the host star with a period of 18.2 days and an eccentricity (ovalness) of 0.4.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.329±0.071 MJ | 0.1508±0.0087 | 18.1991±0.0017 | 0.399±0.056 | — | — |
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