HD 147018
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Triangulum Australe |
| Right ascension | 16h 23m 00.1463s[1] |
| Declination | −61° 41′ 19.542″[1] |
| Apparent magnitude (V) | 8.4[1] |
| Characteristics | |
| Spectral type | G9V[1] |
| Apparent magnitude (B) | 9.0[1] |
| Apparent magnitude (J) | 6.963[1] |
| Apparent magnitude (H) | 6.640[1] |
| Apparent magnitude (K) | 6.571[1] |
| B−V color index | 0.6[1] |
| Astrometry | |
| Radial velocity (Rv) | −27.9 ± 0.2[1] km/s |
| Proper motion (μ) | RA: −178.50[1] mas/yr Dec.: −315.21[1] mas/yr |
| Parallax (π) | 23.43 ± 0.95[1] mas |
| Distance | 139 ± 6 ly (43 ± 2 pc) |
| Absolute magnitude (MV) | 5.25[2] |
| Details | |
| Mass | 0.88 (0.86 to 0.95)[3] M☉ |
| Temperature | 5400[4] K |
| Metallicity | [Fe/H] = 0.06[4] |
| Rotational velocity (v sin i) | 0[3] km/s |
| Age | 12.6 (6.0 to 16.6) × 109[4] years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 147018 is a G-type main sequence star in the constellation of Triangulum Australe.[1] It has an apparent visual magnitude of approximately 8.4.[1] In August 2009, two extrasolar planets, HD 147018 b and HD 147018 c, were reported to be orbiting this star. The planets were found using the radial velocity method, using the CORALIE spectrograph at La Silla Observatory, Chile.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥2.12 ± 0.07 MJ | 0.2388 ± 0.0039 | 44.236 ± 0.008 | 0.4686 ± 0.0081 | — | — |
| c | ≥6.56 ± 0.32 MJ | 1.922 ± 0.039 | 1008 ± 18 | 0.133 ± 0.011 | — | — |
See also
References
- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 LTT 6522 -- High proper-motion Star, database entry, SIMBAD. Accessed on line August 26, 2009.
- ↑ From apparent magnitude and parallax.
- 1 2 HD 147018, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line August 26, 2009.
- 1 2 3 HD 147018, database entry, The Geneva-Copenhagen Survey of the Solar neighbourhood III, J. Holmberg et al., 2009, CDS ID V/130. Accessed on line August 26, 2009.
- ↑ The CORALIE survey for southern extrasolar planets. XVI. Discovery of a planetary system around HD 147018 and of two long period and massive planets orbiting HD 171238 and HD 204313, D. Segransan, S. Udry, M. Mayor, D. Naef, F. Pepe, D. Queloz, N.C. Santos, B-O. Demory, P. Figueira, M. Gillon, M. Marmier, D. Megevand, D. Sosnowska, O. Tamuz, and A. H.M.J. Triaud, arXiv:0908.1479v1, August 11, 2009.
- ↑ Star : HD 147018, entry, Extrasolar Planets Encyclopaedia. Accessed on line September 16, 2009.
Coordinates: 
16h 23m 00.1463s, −61° 41′ 19.542″
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