HD 125612
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 14h 20m 53.517s[1] |
| Declination | –17° 28′ 53.49″[1] |
| Apparent magnitude (V) | 8.31[2] / ? |
| Characteristics | |
| Spectral type | G3V[2] / M3- 4V[3] |
| Apparent magnitude (B) | 8.92 |
| Apparent magnitude (J) | 7.179 |
| Apparent magnitude (H) | 6.950 |
| Apparent magnitude (K) | 6.838 |
| B−V color index | 0.59 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | −18.4 km/s |
| Proper motion (μ) | RA: -61.12 ± 1.25[1] mas/yr Dec.: -67.65 ± 0.79[1] mas/yr |
| Parallax (π) | 18.45 ± 1.09 mas |
| Distance | 180 ± 10 ly (54 ± 3 pc) |
| Absolute magnitude (MV) | 4.72 |
| Position (relative to HD 125612 A)[3] | |
| Component | HD 125612 B |
| Angular distance | 89.994 ± 0.066″ |
| Position angle | 162.682 ± 0.052° |
| Observed separation (projected) | ~4750 AU |
| Details | |
| Mass | 1.091 ± 0.027[2] M☉ |
| Radius | 1.05 ± 0.08[2] R☉ |
| Luminosity | 1.09[2] L☉ |
| Surface gravity (log g) | 4.41 ± 0.05[2] cgs |
| Temperature | 5900 ± 18[2] K |
| Metallicity | [Fe/H] = 0.23 ± 0.014[2] |
| Age | <3[2] Gyr |
| HD 125612 B | |
| Mass | 0.184 ± 0.012[3] M☉ |
| Age | 1-5[3] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 125612 is a yellow main sequence star located approximately 180 light years away in the constellation Virgo. It is rich in heavy elements and has three known planets in orbit around it.[2][4] A red dwarf companion star was detected in 2009 at a projected separation of 4750 AU. The possibility of a much closer companion to the primary star was also suggested, though this will need more observation to better define.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| c | ≥18.4 M⊕ | 0.05 | 4.1547 ± 0.0005 | 0.27 ± 0.12 | — | — |
| b | ≥3.0 MJ | 1.37 | 559.4 ± 1.3 | 0.46 ± 0.01 | — | — |
| d | ≥7.2 MJ | 4.2 | 3008 ± 202 | 0.28 ± 0.12 | — | — |
See also
References
- 1 2 3 4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- 1 2 3 4 5 6 7 8 9 10 11 Lo Curto, G.; et al. (2010). "The HARPS search for southern extra-solar planets. XXII. Multiple planet systems from the HARPS volume limited sample". Astronomy and Astrophysics 512. A48. Bibcode:2010A&A...512A..48L. doi:10.1051/0004-6361/200913523.
- 1 2 3 4 5 Mugrauer, M.; Neuhäuser, R. (2009). "The multiplicity of exoplanet host stars New low-mass stellar companions of the exoplanet host stars HD 125612 and HD 212301". Astronomy and Astrophysics 494: 373–378. arXiv:0812.2561. Bibcode:2009A&A...494..373M. doi:10.1051/0004-6361:200810639.
- ↑ Fischer, Debra A.; et al. (2007). "Five Intermediate-Period Planets from the N2K Sample". The Astrophysical Journal 669 (2): 1336–1344. arXiv:0704.1191. Bibcode:2007ApJ...669.1336F. doi:10.1086/521869.
Coordinates: 
14h 20m 53.5147s, −17° 28′ 53.475″
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