HD 5388
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 00h 55m 11.89s[1] |
| Declination | –47° 24′ 21.5″[1] |
| Apparent magnitude (V) | 6.73[2] |
| Characteristics | |
| Spectral type | F6V[2] |
| Apparent magnitude (B) | 7.73 |
| Apparent magnitude (J) | 5.795 |
| Apparent magnitude (H) | 5.524 |
| Apparent magnitude (K) | 5.441 |
| B−V color index | 0.500[2] |
| Astrometry | |
| Radial velocity (Rv) | 39.2 km/s |
| Proper motion (μ) | RA: –80.14 ± 0.55[1] mas/yr Dec.: –178.07 ± 0.49[1] mas/yr |
| Parallax (π) | 18.62 ± 0.66[1] mas |
| Distance | 175 ± 6 ly (54 ± 2 pc) |
| Absolute magnitude (MV) | 3.10[2] |
| Details | |
| Mass | 1.21[2] M☉ |
| Radius | 1.91[2] R☉ |
| Luminosity | 4.60[2] L☉ |
| Surface gravity (log g) | 4.28 ± 0.06[2] cgs |
| Temperature | 6297 ± 32[2] K |
| Metallicity | -0.27 ± 0.02[2] |
| Rotation | 23 days |
| Rotational velocity (v sin i) | 4.2[2] km/s |
| Age | 5.5 ± 0.5[3] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 5388 (78 G. Phoenicis[4]) is a 7th magnitude F-type main sequence star located approximately 175 light years away in the constellation Phoenix. This star is larger, hotter, brighter, and more massive than our Sun. Also its metal content is half as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.[2] This was later demonstrated to be a brown dwarf rather than a planet.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 69 MJ | 1.76 | 777 ± 4 | 0.40 ± 0.02 | — | — |
See also
References
- 1 2 3 4 5 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 12 13 Santos, N. C.; et al. (2010). "The HARPS search for southern extrasolar planets XXI. Three new giant planets orbiting the metal-poor stars HD5388, HD181720, and HD190984". Astronomy and Astrophysics. 512. A47. arXiv:0912.3216. Bibcode:2010A&A...512A..47S. doi:10.1051/0004-6361/200913489.
- ↑ Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
- ↑ "Uranometria Argentina". Retrieved 2010-07-16.
- 1 2 Sahlmann, J.; et al. (2011). "HD 5388 b is a 69 MJup companion instead of a planet". Astronomy and Astrophysics Letters. 528. L8. arXiv:1102.3372. Bibcode:2011A&A...528L...8S. doi:10.1051/0004-6361/201116533.
Coordinates: 
00h 55m 11.8897s, −47° 24′ 21.475″
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