HD 130322
| Observation data EpochJ2000.0EquinoxJ2000.0 | |
|---|---|
| Constellation | Virgo[1] |
| Right ascension | 14h47m32.7262s[2] |
| Declination | −00° 16′ 53.308″[2] |
| Apparent magnitude(V) | 8.04[1] |
| Characteristics | |
| Spectral type | K0V[3] |
| B−Vcolor index | 0.781±0.002[1] |
| Astrometry | |
| Radial velocity(Rv) | −12.388±0.0005[4]km/s |
| Proper motion(μ) | RA:−130.476(25)mas/yr[2] Dec.:−140.246(25)mas/yr[2] |
| Parallax(π) | 31.3356 ± 0.0262mas[2] |
| Distance | 104.08 ± 0.09ly (31.91 ± 0.03pc) |
| Absolute magnitude(MV) | 5.54[1] |
| Details[5] | |
| Mass | 0.92±0.03M☉ |
| Radius | 0.85±0.04R☉ |
| Luminosity | 0.62[1]L☉ |
| Surface gravity(logg) | 4.52±0.06cgs |
| Temperature | 5,387±44K |
| Metallicity[Fe/H] | −0.02[6]dex |
| Rotation | 26.53±0.70 d |
| Rotational velocity(vsini) | 0.5±0.5km/s |
| Age | 6.1±2.9[7]Gyr |
| Other designations | |
| Database references | |
| SIMBAD | The star |
| planet b | |
| Exoplanet Archive | data |
HD 130322is astarwith a close orbitingexoplanetin theconstellationofVirgo.The distance to this system is 104light years,as determined usingparallaxmeasurements. It is drifting closer to the Sun with aradial velocityof −12.4 km/s.[4]With anapparent visual magnitudeof 8.04,[1]it is too dim to be visible to the naked eye; requiring binoculars or a small telescope to view. Being almost exactly on thecelestial equatorthe star is visible everywhere in the world except for theNorth Pole.The star shows a highproper motion,traversing thecelestial sphereat anangular rateof0.197 arcsec yr−1.[9]
Thespectrumof this star presents as aK-type main-sequence star,an orange dwarf, with astellar classificationof K0V.[3]The star has 92% of the mass of the Sun and 85% of the Sun's radius. It is spinning with arotation periodof 26.5 days.[5]HD 130322 is radiating 62%[1]of the luminosity of the Sun from itsphotosphereat aneffective temperatureof 5,387 K.[5]It is estimated to be around six billion years old.[7]
The star HD 130322 is namedMönchand its companion isEiger.The names were selected in theNameExoWorldscampaign bySwitzerland,during the 100th anniversary of theIAU.MönchandEigerare prominent peaks of theBernese Alps.[10][11]
Planetary system
[edit]In 2000, anextrasolar planetwas discovered orbiting the star usingDoppler spectroscopy.As the inclination of theorbital planeis unknown, only a lower bound on the mass can be estimated. Most likely this is ahot Jupiteras it is orbiting close to the host star and has at least the mass of Jupiter.[6]
The star rotates at an inclination of 76+14
−42degrees relative toEarth.[12]It has been assumed that the planet shares that inclination.[13]But several "hot Jupiters" are known to be oblique relative to the stellar axis.[14]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (Eiger) | >1.089 ± 0.98MJ | 0.0910 ± 0.053 | 10.70871±0.00018 | 0.029±0.016 | — | — |
See also
[edit]References
[edit]- ^abcdefgAnderson, 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.S2CID119257644.
- ^abcdVallenari, A.; et al. (Gaia collaboration) (2023)."GaiaData Release 3. Summary of the content and survey properties ".Astronomy and Astrophysics.674:A1.arXiv:2208.00211.Bibcode:2023A&A...674A...1G.doi:10.1051/0004-6361/202243940.S2CID244398875. Gaia DR3 record for this sourceatVizieR.
- ^abHouk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars".Michigan Spectral Survey.5.Bibcode:1999MSS...C05....0H.
- ^abSoubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars".Astronomy and Astrophysics.616:A7.arXiv:1804.09370.Bibcode:2018A&A...616A...7S.doi:10.1051/0004-6361/201832795.S2CID52952408.
- ^abcdHinkel, Natalie R.; et al. (2015)."Refined Properties of the Hd 130322 Planetary System".The Astrophysical Journal.803(1) 8.arXiv:1502.03441.Bibcode:2015ApJ...803....8H.doi:10.1088/0004-637X/803/1/8.
- ^abUdry, S.; et al. (2000)."The CORALIE survey for southern extra-solar planets II. The short-period planetary companions to HD 75289 and HD 130322".Astronomy and Astrophysics.356(2): 590–598.Bibcode:2000A&A...356..590U.
- ^abBonfanti, A.; et al. (2016). "Age consistency between exoplanet hosts and field stars".Astronomy & Astrophysics.585:14.arXiv:1511.01744.Bibcode:2016A&A...585A...5B.doi:10.1051/0004-6361/201527297.S2CID53971692.A5.
- ^"HD 130322".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2019-01-16.
- ^Luyten, W. J. (June 1995). "VizieR Online Data Catalog: NLTT Catalogue (Luyten, 1979)".VizieR Online Data Catalog.Bibcode:1995yCat.1098....0L.
- ^"Approved names".NameExoworlds.Retrieved2020-01-02.
- ^"International Astronomical Union | IAU".www.iau.org.Retrieved2020-01-02.
- ^Simpson, E. K.; et al. (November 2010), "Rotation periods of exoplanet host stars",Monthly Notices of the Royal Astronomical Society,408(3): 1666–1679,arXiv:1006.4121,Bibcode:2010MNRAS.408.1666S,doi:10.1111/j.1365-2966.2010.17230.x,S2CID6708869
- ^"hd_130322_b".Extrasolar Planets Encyclopaedia.RetrievedNovember 12,2012.
- ^Sanchis-Ojeda, Roberto; et al. (2012). "Starspots and spin-orbit alignment for Kepler cool host stars".Astronomische Nachrichten.334(1–2): 180–183.arXiv:1211.2002.Bibcode:2013AN....334..180S.doi:10.1002/asna.201211765.S2CID38743202.
- ^Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets".The Astrophysical Journal.646(1): 505–522.arXiv:astro-ph/0607493.Bibcode:2006ApJ...646..505B.doi:10.1086/504701.S2CID119067572.
