HD 60532

HD 60532 is a star with two orbiting exoplanets in the southern constellation of Puppis. The designation HD 60532 takes its name from the Henry Draper Catalogue. The system is located at a distance of 85.5 light years from the Sun, and is drifting further away with a radial velocity of 61 km/s.^[5] At that distance, the star has an apparent visual magnitude of 4.45,^[2] which is bright enough to be faintly visible to the naked eye. The motion of this system through space brought it within 10.3 light-years of the Sun some 408,600 years ago.^[11]

HD 60532

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Puppis
Right ascension	07h 34m 03.181s[1]
Declination	–22° 17′ 45.84″[1]
Apparent magnitude (V)	4.450[2]
Characteristics
Spectral type	F6 IV-V[3]
U−B color index	+0.07[4]
B−V color index	+0.51[4]
Astrometry
Radial velocity (Rv)	61.042±0.0004[5] km/s
Proper motion (μ)	RA: –40.180 mas/yr[1] Dec.: 46.791 mas/yr[1]
Parallax (π)	38.1379 ± 0.1087 mas[1]
Distance	85.5 ± 0.2 ly (26.22 ± 0.07 pc)
Absolute magnitude (MV)	2.40[2]
Details
Mass	1.44+0.03 −0.1[6] M☉
Radius	2.66±0.03[7] R☉
Luminosity	9.3±0.1[7] L☉
Surface gravity (log g)	3.75±0.02[7] cgs
Temperature	6,095[6] K
Metallicity [Fe/H]	–0.42[6] dex
Rotational velocity (v sin i)	8[6] km/s
Age	2.7±0.1[6] Gyr
Other designations
108 G. Puppis, BD–21° 2007, GC 10134, GJ 279, HIP 36795, HR 2906, SAO 174009, 2MASS J07340317-2217457[8][9][10]
Database references
SIMBAD	data
Exoplanet Archive	data
ARICNS	data

The spectrum of this star shows blended features of an F-type main-sequence star and an evolving subgiant star, with a corresponding stellar classification of F6 IV-V.^[3] It is an estimated 2.7 billion years old with a projected rotational velocity of 8 km/s and a low level of magnetic activity in its chromosphere.^[6] The star has 1.44^[6] times the mass of the Sun and 2.66 times the Sun's radius.^[7] The abundance of iron, a measure of the star's metallicity, is a scant 38% of solar.^[6] HD 60532 is radiating 9.3^[7] times the luminosity of the Sun from its photosphere at an effective temperature of 6,095 K.^[6]

Planetary system

In September 2008, two Jupiter-like planets were found orbiting the star.^[6] The orbital periods of these two planets appear to be in 3:1 resonance.^[12]

The HD 60532 planetary system^[13]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥1.06±0.08 MJ	0.77±0.02	201.9±0.3	0.26±0.02	—	—
c	≥2.51±0.16 MJ	1.60±0.04	600.1±2.4	0.03±0.02	—	—

See also

• HD 69830
• List of extrasolar planets

References

1. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data 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. S2CID 244398875. Gaia DR3 record for this source at VizieR.
2. Nordström, B.; et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs", Astronomy and Astrophysics, 418: 989–1019, arXiv:astro-ph/0405198, Bibcode:2004A&A...418..989N, doi:10.1051/0004-6361:20035959, S2CID 11027621.
3. Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992.
4. Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
5. Soubiran, 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, S2CID 52952408.
6. Desort, M.; et al. (2008), "Extrasolar planets and brown dwarfs around A-F type stars V. A planetary system found with HARPS around the F6IV-V star HD 60532", Astronomy and Astrophysics, 491 (3): 883–888, arXiv:0809.3862, Bibcode:2008A&A...491..883D, doi:10.1051/0004-6361:200810241, S2CID 14562319.
7. Bonfanti, 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, S2CID 53971692, A5.
8. "HD 60532". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2024-01-06.
9. Gould, Benjamin Apthorp (1879), Uranometria Argentina: brightness and position of every fixed star, down to the seventh magnitude, within one hundred degrees of the South Pole, vol. 1, Observatorio Nacional Argentino, p. 172.
10. Gould, Benjamin Apthorp; Pilcher, Frederick, Uranometria Argentina, Revised, archived from the original on 2012-02-27, retrieved 2011-12-08.
11. Bailer-Jones, C.A.L.; Rybizki, J.; Andrae, R.; Fouesnea, M. (2018), "New stellar encounters discovered in the second Gaia data release", Astronomy & Astrophysics, 616: A37, arXiv:1805.07581, Bibcode:2018A&A...616A..37B, doi:10.1051/0004-6361/201833456, S2CID 56269929.
12. Laskar, J.; Correia, A. C. M. (2009), "HD60532, a planetary system in a 3:1 mean motion resonance", Astronomy & Astrophysics Letters, 496 (2): L5 – L8, arXiv:0902.0667, Bibcode:2009A&A...496L...5L, doi:10.1051/0004-6361/200911689, S2CID 17793870.
13. Borgniet, S.; et al. (2017), "Extrasolar planets and brown dwarfs around AF-type stars. IX. The HARPS southern sample", Astronomy and Astrophysics, 599, A57, arXiv:1608.08257, Bibcode:2017A&A...599A..57B, doi:10.1051/0004-6361/201628805, S2CID 118723455.

External links

• "HD 60532". Exoplanets. Archived from the original on 2009-11-24. Retrieved 2008-11-09.