HD 190984
HD 190984 is a 9th magnitude F-type main sequence star located approximately 330 light years away in the constellation Pavo. This star is larger, hotter, brighter, and more massive than our Sun. Also its metal content is one-thirds as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥3.1 MJ | 5.5 | 4885 ± 1600 | 0.57 ± 0.10 | — | — |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pavo |
| Right ascension | 20h 11m 30.716s[1] |
| Declination | –64° 37′ 13.69″[1] |
| Apparent magnitude (V) | 8.76[2] |
| Characteristics | |
| Spectral type | F8V[2] |
| Apparent magnitude (B) | 9.27 |
| Apparent magnitude (J) | 7.671 |
| Apparent magnitude (H) | 7.389 |
| Apparent magnitude (K) | 7.319 |
| B−V color index | 0.579[2] |
| Astrometry | |
| Radial velocity (Rv) | 20.2 km/s |
| Proper motion (μ) | RA: 0.68 ± 0.73[1] mas/yr Dec.: 44.57 ± 0.81[1] mas/yr |
| Parallax (π) | 9.8 ± 2.6[2] mas |
| Distance | approx. 330 ly (approx. 100 pc) |
| Absolute magnitude (MV) | 3.71[2] |
| Details | |
| Mass | 0.91[2] M☉ |
| Radius | 1.53[2] R☉ |
| Luminosity | 2.69[2] L☉ |
| Surface gravity (log g) | 4.02 ± 0.22[2] cgs |
| Temperature | 5988 ± 25[2] K |
| Metallicity | -0.48 ± 0.06[2] |
| Rotation | 23 days |
| Rotational velocity (v sin i) | 3.4[2] km/s |
| Other designations | |
CD–64°1271, HIP 99496, PPM 364454 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
References
- 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
- 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.
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