HD 87883 is star in the northern constellation of Leo Minor. It is too faint to be viewed with the naked eye, having an apparent visual magnitude of 7.56.[2] The star is located at a distance of 59.7 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +9.3 km/s.[4] It has an absolute magnitude of 6.27.[5]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Leo Minor |
| Right ascension | 10h 08m 43.14059s[1] |
| Declination | +34° 14′ 32.1466″[1] |
| Apparent magnitude (V) | 7.56[2] |
| Characteristics | |
| Spectral type | K0V[3] |
| Apparent magnitude (B) | 8.525[2] |
| Apparent magnitude (J) | 5.839±0.020[2] |
| Apparent magnitude (H) | 5.441±0.046[2] |
| Apparent magnitude (K) | 5.314±0.020[2] |
| B−V color index | 0.965±0.013[2] |
| Astrometry | |
| Radial velocity (Rv) | +9.320±0.003[4] km/s |
| Proper motion (μ) | RA: −64.293±0.027 mas/yr[1] Dec.: −61.438±0.025 mas/yr[1] |
| Parallax (π) | 54.6678 ± 0.0295 mas[1] |
| Distance | 59.66 ± 0.03 ly (18.292 ± 0.010 pc) |
| Absolute magnitude (MV) | 6.27[5] |
| Details | |
| Mass | 0.80±0.02[6] M☉ |
| Radius | 0.76±0.03[5] R☉ |
| Luminosity | 0.338±0.008[6] L☉ |
| Surface gravity (log g) | 4.56[3] cgs |
| Temperature | 4,980±44[5] K |
| Metallicity [Fe/H] | 0.093±0.04[5] dex |
| Rotation | 38.6 days[5] |
| Rotational velocity (v sin i) | 2.17±0.50[5] km/s |
| Age | 7.6+2.8 −1.8[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| ARICNS | data |
This is an ordinary K-type main-sequence star with a stellar classification of K0V.[3] It has a modest level of chromospheric activity,[5] and is rotating with a period of 38.6 days.[5] The star is smaller than the Sun, with 82% of the mass of the Sun and 76% of the Sun's radius. The age of this star is 9.8 billion years, compared with 4.6 billion years for the Sun. It is radiating 32% of the luminosity of the Sun from its photosphere at an effective temperature of 4,980 K.[5]
In August 2009, this star was found to have a planet via the radial velocity method. The orbital solution shows it to be a Super-Jupiter body in an elliptical orbit with a period of 7.54 yr and a typical separation of 3.6 AU. A relatively high deviation on the model fit suggests there may be an additional planetary companion in a close, perturbing orbit of the star.[5] The orbital parameters of the known planet do not preclude the existence of an Earth-mass planet with a dynamically-stable orbit in the habitable zone.[8] Since its orbit is relatively face-on, its true mass deviates significantly from its minimum mass, at 6.31+0.31
−0.32 MJ.[6][9]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (years) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 6.31+0.31 −0.32 MJ | 3.77+0.12 −0.094 | 8.23+0.32 −0.34 | 0.720+0.038 −0.027 | 16.8+1.7 −1.4° | — |