HD 45652

HD 45652 (Lusitânia) is a G8-K0 star located in the constellation Monoceros.[3] It is approximately 114 light years (35 parsecs) from Earth with apparent magnitude 8.13.[2]

HD 45652 (Lusitânia)

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Monoceros
Right ascension	06^h 29^m 13.1919^s[1]
Declination	+10° 56′ 02.0061″[1]
Apparent magnitude (V)	8.13[2]
Characteristics
Spectral type	G8-K0[3]
B−V color index	0.85[2]
V−R color index	0.5[2]
R−I color index	0.4[2]
Astrometry
Proper motion (μ)	RA: 206.328±0.106[1] mas/yr Dec.: −62.573±0.089[1] mas/yr
Parallax (π)	28.6622 ± 0.0551[1] mas
Distance	113.8 ± 0.2 ly (34.89 ± 0.07 pc)
Absolute magnitude (MV)	5.3[4]
Details
Mass	0.83 ± 0.05[3] M☉
Surface gravity (log g)	4.32 ± 0.21[3] cgs
Temperature	5312 ± 68[3] K
Metallicity	[Fe/H] = 0.29 ± 0.07[3]
Age	6.0 ± 2.9[5] Gyr
Other designations
Lusitânia, BD+11 1197, GC 8415,  HIP 30905, NLTT 16570, SAO 95735.[2]
Database references
SIMBAD	data

In May 2008, the discovery of an extrasolar planet, HD 45652 b, orbiting the star was announced. The planet was detected by the radial velocity method, using observations made from 2005 to 2007.[3]

HD 45652 was officially named Lusitânia on the 17th of December 2019 after the IAU100 press conference in Paris by the IAU (International Astronomical Union).[6]

The HD 45652 planetary system[7]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥0.433±0.076 MJ	0.237±0.011	44.073±0.0048	0.607±0.026	—	—

References

1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
2. NLTT 16570, entry, SIMBAD. Accessed on line June 13, 2008.
3. Santos, N. C.; et al. (2008). "ELODIE metallicity-biased search for transiting Hot Jupiters. V. An intermediate-period Jovian planet orbiting HD 45652". Astronomy and Astrophysics. 487 (1): 369–372. arXiv:0805.1019. Bibcode:2008A&A...487..369S. doi:10.1051/0004-6361:200809402. S2CID 14178114.
4. From parallax and apparent magnitude.
5. 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.
6. "112 sets of exoplanets and host stars named in the IAU100". International Astronomical Union. Retrieved 2019-12-18.
7. 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.

External links

• "Notes for star HD 45652". The Extrasolar Planets Encyclopaedia.
• "NLTT 16570 -- High proper-motion Star". SIMBAD.