astro.wikisort.org - StarHD 11506 is a star in the equatorial constellation of Cetus. It has a yellow hue and can be viewed with a small telescope but is too faint to be visible to the naked eye, having an apparent visual magnitude of 7.51.[2] The distance to this object is 167 light years based on parallax, but it is drifting closer to the Sun with a radial velocity of −7.5 km/s.[1] It has an absolute magnitude of 3.94.[2]
Star in the constellation Cetus
HD 11506
Observation data Epoch J2000.0 Equinox J2000.0 |
Constellation |
Cetus |
Right ascension |
01h 52m 50.534416s[1] |
Declination |
−19° 30′ 25.108238″[1] |
Apparent magnitude (V) |
7.51[2] |
Characteristics |
Spectral type |
G0V[3] |
B−V color index |
0.607±0.015[2] |
Astrometry |
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Radial velocity (Rv) | −7.53±0.13[1] km/s |
Proper motion (μ) | RA: 22.039±0.022[1] mas/yr Dec.: −97.904±0.016[1] mas/yr |
Parallax (π) | 19.5342 ± 0.0221 mas[1] |
Distance | 167.0 ± 0.2 ly (51.19 ± 0.06 pc) |
Absolute magnitude (MV) | 3.94[2] |
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Details[4] |
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Mass | 1.12±0.02 M☉ |
Radius | 1.06±0.01 R☉ |
Luminosity | 1.17±0.01 L☉ |
Surface gravity (log g) | 4.43±0.02 cgs |
Temperature | 5,833±28 K |
Metallicity [Fe/H] | 0.29±0.03[5] dex |
Rotational velocity (v sin i) | 5.01[6] km/s |
Age | 1.6±0.9 Gyr |
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Other designations |
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BD−20°358, HD 11506, HIP 8770, SAO 148079 [7] |
Database references |
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SIMBAD | data |
Exoplanet Archive | data |
Extrasolar Planets Encyclopaedia | data |
This object is an ordinary G-type main-sequence star with a stellar classification of G0V,[3] which indicates it is generating energy via hydrogen fusion at its core. It is around 1.6[4] billion years old and is spinning with a projected rotational velocity of 5 km/s.[6] The star has 112% of the mass of the Sun and 106% of the Sun's radius. The spectrum shows a higher than solar abundance of elements other than hydrogen and helium – what astronomers term the metallicity.[5] The star is radiating 117% of the Sun's luminosity from its photosphere at an effective temperature of 5,833 K.[4]
Planetary system
The superjovian planet HD 11506 b was discovered orbiting the star by the N2K Consortium in 2007 using the doppler spectroscopy method.[3] In 2009, a second planet discovery was claimed based on Bayesian analysis of the original data.[8] However, in 2015 additional radial velocity measurements showed that the planetary parameters were significantly different than those determined by Bayesian analysis. An additional linear trend in the radial velocities indicates a stellar or planetary companion on a long term orbit.[5] In 2022, the presence of a third planet with an orbital period of 40 years was confirmed, and the mass and inclination of both planet b and the new planet d were measured via astrometry.[9]
The HD 11506 planetary system[10][9]
Companion (in order from star) |
Mass |
Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
Inclination |
Radius |
c |
≥0.408±0.057 MJ |
0.774±0.038 |
223.41±0.32 |
0.193±0.038 |
— |
— |
b |
4.880+1.986 −0.333 MJ |
2.800+0.123 −0.136 |
1,613.7+4.3 −4.5 |
0.391±0.010 |
112.598+23.304 −52.700° |
— |
d |
7.383+2.015 −1.085 MJ |
12.235+1.571 −1.762 |
14,723.6+2,801.3 −2,735.0 |
0.061+0.028 −0.022 |
82.004+25.098 −21.421° |
— |
References
- Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
- Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
- Fischer, Debra A.; et al. (2007). "Five Intermediate-Period Planets from the N2K Sample". The Astrophysical Journal. 669 (2): 1336–1344. arXiv:0704.1191. Bibcode:2007ApJ...669.1336F. doi:10.1086/521869. S2CID 7774321.
- Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. S2CID 54555839.
- Giguere, Matthew J.; et al. (2015). "Newly Discovered Planets Orbiting HD 5319, HD 11506, HD 75784 and HD 10442 from the N2K Consortium". The Astrophysical Journal. 799 (1). 89. arXiv:1411.5374. Bibcode:2015ApJ...799...89G. doi:10.1088/0004-637X/799/1/89. S2CID 56121568.
- Delgado Mena, E.; et al. (April 2015). "Li abundances in F stars: planets, rotation, and Galactic evolution". Astronomy & Astrophysics. 576: 24. arXiv:1412.4618. Bibcode:2015A&A...576A..69D. doi:10.1051/0004-6361/201425433. S2CID 56051637. A69.
- "HD 11506". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-11-10.
- Tuomi, M.; Kotiranta, S. (2009). "Bayesian analysis of the radial velocities of HD 11506 reveals another planetary companion". Astronomy and Astrophysics. 496 (2): L13–L16. arXiv:0902.2997. Bibcode:2009A&A...496L..13T. doi:10.1051/0004-6361/200811531. S2CID 16414890.
- Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21). arXiv:2208.12720. Bibcode:2022arXiv220812720F. doi:10.3847/1538-4365/ac7e57.
- Ment, Kristo; et al. (2018). "Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810". The Astronomical Journal. 156 (5). 213. arXiv:1809.01228. Bibcode:2018AJ....156..213M. doi:10.3847/1538-3881/aae1f5. S2CID 119243619.
Constellation of Cetus |
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На других языках
[de] HD 11506
HD 11506 ist ein Hauptreihenstern der Spektralklasse G0, der von den zwei potentiellen Exoplaneten HD 11506 b und HD 11506 c umkreist wird. Der Stern liegt im Sternbild Walfisch und besitzt eine Masse von ca. 1,2 Sonnenmassen.
- [en] HD 11506
[ru] HD 11506
HD 11506 — звезда, которая находится в созвездии Кита на расстоянии около 175,5 световых лет от нас. Вокруг звезды обращается, как минимум, две планеты.
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