HD 109749
HD 109749
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
Constellation | Centaurus |
Right ascension | 12h 37m 16.3781s |
Declination | −40° 48′ 43.619″ |
Apparent magnitude (V) | 8.1 |
| Distance | 192 ly (59 pc) |
| Spectral type | G3IV |
| Other designations | |
CD-40° 7393, HIP 61595, SAO 223556 | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | data |
HD 109749 is a binary star about 192 light years away in the constellation of Centaurus.
Contents
1 Stellar system
2 Planetary system
3 See also
4 References
Stellar system[edit]
The primary star, HD 109749 A, is a G-type subgiant with a spectral type of G3IV,[1] indicating it is an evolved star with a luminosity higher than that of a main sequence star. It has a mass of 1.14 M☉ and a radius of 1.21 R☉. The star is shining with a luminosity of 1.55 L☉ and has an effective temperature of 5,860 K. Evolutionary models estimate an age of 4.1 billion years.[2] HD 109749 A is chromospherically inactive and has a high metallicity, with an iron abundance 78% larger than the Sun's.[1]
The secondary star, HD 109749 B, is a K-type main sequence star with an apparent magnitude of 10.3.[3] It has a mass of about 0.78 M☉ and is located at a separation of 8.4 arcseconds, which corresponds to a projected separation of 500 AU. This star has the same proper motion as the primary and seems to be at the same distance, confirming they form a physical binary system.[4]
Planetary system[edit]
In 2005, an exoplanet was discovered around HD 109749 A. It was detected by the radial velocity method as part of the N2K Consortium. It is a hot Jupiter with a minimum mass of 0.28 MJ and an semimajor axis of 0.06 AU.[1]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
b | >0.28 ± 0.016 MJ | 0.0635 | 5.240 ± 0.002 | 0.01 ± 0.01 | — | — |
See also[edit]
- HD 149143
- List of extrasolar planets
References[edit]
^ abcd Fischer, Debra A.; et al. (2006). "The N2K Consortium. III. Short-Period Planets Orbiting HD 149143 and HD 109749". The Astrophysical Journal. 637 (2): 1094–1101. Bibcode:2006ApJ...637.1094F. doi:10.1086/498557..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^ Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: A5, 14 pp. arXiv:1511.01744. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297.
^ "HD 109749B -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2018-01-20.
^ Desidera, S.; Barbieri, M. (January 2007). "Properties of planets in binary systems. The role of binary separation". Astronomy and Astrophysics. 462 (1): 345–353. arXiv:astro-ph/0610623. Bibcode:2007A&A...462..345D. doi:10.1051/0004-6361:20066319.CS1 maint: Multiple names: authors list (link)
Coordinates: 
12h 37m 16.3781s, −40° 48′ 43.619″
Categories:
- G-type subgiants
- Binary stars
- K-type main-sequence stars
- Henry Draper Catalogue objects
- Hipparcos objects
- Centaurus (constellation)
- Planetary systems
- Durchmusterung objects
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