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 |
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]
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 ° |
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