HD 30669

Last updated
HD 30669
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Caelum
Right ascension 04h 48m 28.48538s [1]
Declination −28° 25′ 09.4617″ [1]
Apparent magnitude  (V)9.11±0.01 [2]
Characteristics
Spectral type G8/K0 V [3]
B−V color index +0.82 [2]
Astrometry
Radial velocity (Rv)65.7±0.4 [4]  km/s
Proper motion (μ)RA: +237.591  mas/yr [1]
Dec.: +50.927  mas/yr [1]
Parallax (π)17.2896 ± 0.0127  mas
Distance 188.6 ± 0.1  ly
(57.84 ± 0.04  pc)
Absolute magnitude  (MV)+5.35 [5]
Details
Mass 0.92±0.03 [6]   M☉
Radius 0.91±0.04 [7]   R☉
Luminosity 59.7% [8]   L☉
Surface gravity (log g)4.43±0.06 [9]   cgs
Temperature 5,353±100 [9]   K
Metallicity [Fe/H]+0.13 [10]   dex
Rotational velocity (v sin i)<1.7 [7]  km/s
Age 7.25±4.64 [11]   Gyr
Other designations
CD−28°1759, CPD−28°661, HD  30669, HIP  22320, SAO  169782, LTT  2095 [12]
Database references
SIMBAD data

HD 30669 is a yellowish-orange hued star located in the southern constellation Caelum, the chisel. It has an apparent magnitude of 9.11, [2] making it readily visible in small telescopes but not to the naked eye. The object is relatively close at a distance of 188 light years, based on parallax measurements from Gaia DR3. [1] Its distance from the Solar System is rapidly increasing, having a heliocentric radial velocity of 66  km/s . [4]

Contents

Characteristics

HD 30669 has a stellar classification of G8/K0 V [3] — a main sequence star with the characteristics of a star with a class of G8 and K0. It has alternatively been given a class of G9 V. It has 92% the mass of the Sun [6] and 91% its radius. [7] The object radiates 59.7% the luminosity of the Sun [8] from its photosphere at an effective temperature of 5,353  K [9] from its photosphere. Like most planetary hosts, HD 30669 is metal enriched, having a metallicity 35% above solar levels. [10] The star is extremely chromopsherically inactive and is estimated to be 7+1⁄4 billion years old. [11]

Planetary System

In 2015, C. Motou and colleagues discovered a long period exoplanet orbiting the star during a HARPS survey. It has nearly half the mass of Jupiter and it takes over 4+1⁄2 years to revolve HD 30669 in a slightly eccentric orbit. [7]

The HD 30669 planetary system [7]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(years)		 Eccentricity Inclination Radius
b≥0.47±0.06  MJ 2.69±0.084.614±0.1670.18±0.15——

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References

  1. 1 2 3 4 5 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.
  2. 1 2 3 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361.
  3. 1 2 Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars III: Declinations −40° to −26°. Bibcode:1982mcts.book.....H.
  4. 1 2 Gontcharov, G. A. (November 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. eISSN   1562-6873. ISSN   1063-7737. S2CID   119231169.
  5. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN   1562-6873. ISSN   1063-7737. S2CID   119257644.
  6. 1 2 Gomes da Silva, J.; Santos, N. C.; Adibekyan, V.; Sousa, S. G.; Campante, T. L.; Figueira, P.; Bossini, D.; Delgado-Mena, E.; Monteiro, M. J. P. F. G.; de Laverny, P.; Recio-Blanco, A.; Lovis, C. (February 2021). "Stellar chromospheric activity of 1674 FGK stars from the AMBRE-HARPS sample". Astronomy & Astrophysics. 646: A77. arXiv: 2012.10199 . Bibcode:2021A&A...646A..77G. doi: 10.1051/0004-6361/202039765 . eISSN   1432-0746. ISSN   0004-6361.
  7. 1 2 3 4 5 Moutou, C.; Lo Curto, G.; Mayor, M.; Bouchy, F.; Benz, W.; Lovis, C.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Ségransan, D.; Sousa, S. G.; Udry, S. (26 March 2015). "The HARPS search for southern extra-solar planets". Astronomy & Astrophysics. 576: A48. arXiv: 1412.6591 . Bibcode:2015A&A...576A..48M. doi: 10.1051/0004-6361/201424965 . eISSN   1432-0746. ISSN   0004-6361.
  8. 1 2 Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S.; Mowlavi, N. (16 April 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood". Astronomy & Astrophysics. 418 (3): 989–1019. arXiv: astro-ph/0405198 . Bibcode:2004A&A...418..989N. doi: 10.1051/0004-6361:20035959 . eISSN   1432-0746. ISSN   0004-6361.
  9. 1 2 3 Aguilera-Gómez, Claudia; Ramírez, Iván; Chanamé, Julio (June 2018). "Lithium abundance patterns of late-F stars: an in-depth analysis of the lithium desert". Astronomy & Astrophysics. 614: A55. arXiv: 1803.05922 . Bibcode:2018A&A...614A..55A. doi: 10.1051/0004-6361/201732209 . eISSN   1432-0746. ISSN   0004-6361.
  10. 1 2 Mortier, A.; Santos, N. C.; Sousa, S.; Israelian, G.; Mayor, M.; Udry, S. (March 2013). "On the functional form of the metallicity-giant planet correlation". Astronomy & Astrophysics. 551: A112. arXiv: 1302.1851 . Bibcode:2013A&A...551A.112M. doi: 10.1051/0004-6361/201220707 . eISSN   1432-0746. ISSN   0004-6361.
  11. 1 2 Pace, G. (22 February 2013). "Chromospheric activity as age indicator". Astronomy & Astrophysics. 551: L8. arXiv: 1301.5651 . Bibcode:2013A&A...551L...8P. doi: 10.1051/0004-6361/201220364 . eISSN   1432-0746. ISSN   0004-6361.
  12. ↑ "HD 30669". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 19 September 2019.
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