HD 164604
HD 164604 is a K dwarf star in the Sagittarius constellation.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 03m 06.933s[1] |
| Declination | –28° 33′ 38.32″[1] |
| Apparent magnitude (V) | 9.83[2] |
| Characteristics | |
| Spectral type | K3.5Vk: |
| Apparent magnitude (B) | 10.88[2] |
| Apparent magnitude (J) | 7.784[3] |
| Apparent magnitude (H) | 7.306[3] |
| Apparent magnitude (K) | 7.169[3] |
| B−V color index | 0.8 |
| Astrometry | |
| Radial velocity (Rv) | +6.30 ± 0.6[4] km/s |
| Proper motion (μ) | RA: -32.33[1] mas/yr Dec.: -39.10[1] mas/yr |
| Parallax (π) | 24.35 ± 1.76[1] mas |
| Distance | 134 ± 10 ly (41 ± 3 pc) |
| Absolute magnitude (MV) | 7.1 |
| Details | |
| Mass | 0.80 M☉ |
| Metallicity | -0.18 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
The survey in 2015 have ruled out the existence of any additional stellar companions at projected distances from 13 to 340 astronomical units.[6]
The star HD 164604 is named Pincoya. The name was selected in the NameExoWorlds campaign by Chile, during the 100th anniversary of the IAU. Pincoya is a female water spirit from southern Chilean mythology who is said to bring drowned sailors to the Caleuche so that they can live in the afterlife.[7][8]
Planetary system
A single gas giant planet was detected by the Magellan Planet Search Program in 2010.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥2.7 ± 1.3 MJ | 1.3 ± 0.05 | 606.4 ± 9.0 | 0.24 ± 0.14 | — | — |
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
- Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- Cutri, R. M.; et al. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. Bibcode:2003yCat.2246....0C.
- Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- "HD 164604". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 February 2018.
- Mugrauer, M.; Ginski, C. (12 May 2015). "High-contrast imaging search for stellar and substellar companions of exoplanet host stars". Monthly Notices of the Royal Astronomical Society. 450 (3). doi:10.1093/mnras/stv771. Retrieved 19 June 2020.
- "Approved names". NameExoworlds. Retrieved 2020-01-02.
- "Name Exo Worlds". www.iau.org. International Astronomical Union | IAU. Retrieved 2020-01-02.
- Arriagada, Pamela; et al. (2010). "Five Long-period Extrasolar Planets in Eccentric orbits from the Magellan Planet Search Program". The Astrophysical Journal. 711 (2): 1229–35. arXiv:1001.4093. Bibcode:2010ApJ...711.1229A. doi:10.1088/0004-637X/711/2/1229.
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