HAT-P-4
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 15h 19m 57.922s[1] |
| Declination | +36° 13′ 46.73″[1] |
| Apparent magnitude (V) | 11.0[2] |
| Characteristics | |
| Spectral type | F[2] |
| B−V color index | 0.771 |
| Astrometry | |
| Proper motion (μ) | RA: –21.9 ± 1.2[1] mas/yr Dec.: –23.4 ± 0.7[1] mas/yr |
| Parallax (π) | 0.2 mas |
| Distance | 1010.6 ± 97.8 ly (310 ± 30 pc) |
| Details | |
| Mass | ~ 1.26 M☉ |
| Radius | 1.59 ± 0.07 R☉ |
| Luminosity | 0.41 L☉ |
| Surface gravity (log g) | 4.14 ± 0.03[3] cgs |
| Temperature | 5890 ± 67[3] K |
| Metallicity [Fe/H] | 0.20 ± 0.08[3] dex |
| Rotational velocity (v sin i) | 5.6 ± 0.9[3] km/s |
| Age | ~4.2 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
HAT-P-4 is a F9-type main-sequence star in the constellation of Boötes.[2] It is also designated BD+36°2593.
Planetary System
This star is home to the transiting extrasolar planet HAT-P-4b.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.68 ± 0.04 MJ | 0.04465 ± 0.00042 | 3.0565254 ± 0.0000012 | 0 | — | — |
See also
References
- 1 2 3 4 Zacharias, N.; et al. (2013). "The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". The Astronomical Journal. 145 (2). 44. arXiv:1212.6182
. Bibcode:2013AJ....145...44Z. doi:10.1088/0004-6256/145/2/44.Vizier catalog entry - 1 2 3 "SIMBAD query result: NAME HAT-P-4 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-24.
- 1 2 3 4 Torres, Guillermo; et al. (2012). "Improved Spectroscopic Parameters for Transiting Planet Hosts". The Astrophysical Journal. 757 (2). 161. arXiv:1208.1268. Bibcode:2012ApJ...757..161T. doi:10.1088/0004-637X/757/2/161.
- ↑ Kovács, G.; et al. (2007). "HAT-P-4b: A Metal-rich Low-Density Transiting Hot Jupiter". The Astrophysical Journal Letters. 670 (1): L41–L44. arXiv:0710.0602. Bibcode:2007ApJ...670L..41K. doi:10.1086/524058.
- ↑ Todorov, Kamen O.; et al. (2013). "Warm Spitzer Photometry of Three Hot Jupiters: HAT-P-3b, HAT-P-4b and HAT-P-12b". The Astrophysical Journal. 770 (2). 102. arXiv:1305.0833. Bibcode:2013ApJ...770..102T. doi:10.1088/0004-637X/770/2/102.
- ↑ Sada, Pedro V.; et al. (2012). "Extrasolar Planet Transits Observed at Kitt Peak National Observatory". Publications of the Astronomical Society of the Pacific. 124 (913): 212–229. arXiv:1202.2799. Bibcode:2012PASP..124..212S. doi:10.1086/665043.
External links
- Image HAT-P-4
- "HAT-P-4". Exoplanets. Retrieved 2009-05-10.
Coordinates: 
15h 19m 58s, +36° 13′ 47″
This article is issued from Wikipedia - version of the 4/4/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.