BD−08°2823
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sextans |
| Right ascension | 10h 00m 47.7206s[1] |
| Declination | –09° 31′ 00.0428″[1] |
| Apparent magnitude (V) | 9.86 |
| Characteristics | |
| Spectral type | K3V |
| Apparent magnitude (B) | 10.93 |
| Apparent magnitude (J) | 7.960 |
| Apparent magnitude (H) | 7.498 |
| Apparent magnitude (K) | 7.323 |
| B−V color index | 1.071 |
| Astrometry | |
| Proper motion (μ) | RA: −375.517±0.066[1] mas/yr Dec.: 25.460±0.060[1] mas/yr |
| Parallax (π) | 24.1641 ± 0.0397 mas[1] |
| Distance | 135.0 ± 0.2 ly (41.38 ± 0.07 pc) |
| Absolute magnitude (MV) | 6.74 |
| Details | |
| Mass | 0.74 ± 0.07 M☉ |
| Radius | 0.66 ± 0.09 R☉ |
| Luminosity | 0.20 L☉ |
| Surface gravity (log g) | 4.13 ± 0.26 cgs |
| Temperature | 4746 ± 63 K |
| Metallicity | -0.07 ± 0.03 |
| Rotation | 26.6 ± 1.5 days |
| Rotational velocity (v sin i) | 1.4 km/s |
| Age | 4.5 ± 4 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | 2823 data |
| Exoplanet Archive | data |
BD−08°2823 is a 9.86 magnitude K-type main sequence star located approximately 135 light years away in the constellation Sextans. This star is smaller, cooler, fainter, and less massive than the Sun. Also its metal content is six-sevenths as much as the Sun.
Planetary system
In 2009, two gas giant planets were found in orbit around the star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.045 ± 0.007 MJ | 0.056 ± 0.002 | 5.60 ± 0.02 | 0.15 ± 0.15 | — | — |
| c | ≥0.33 ± 0.03 MJ | 0.68 ± 0.02 | 237.6 ± 1.5 | 0.19 ± 0.09 | — | — |
See also
References
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Hébrard, G.; et al. (2010). "The HARPS search for southern extra-solar planets XX. Planets around the active star BD -08°2823". Astronomy and Astrophysics. 512. A46. arXiv:0912.3202. Bibcode:2010A&A...512A..46H. doi:10.1051/0004-6361/200913525. S2CID 73713738.
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