HD 143361
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Norma |
| Right ascension | 16h 01m 50.34828s[1] |
| Declination | −44° 26′ 04.3434″[1] |
| Apparent magnitude (V) | 9.20[2] |
| Characteristics | |
| Evolutionary stage | main sequence[1] |
| Spectral type | G6 V[3] |
| Apparent magnitude (B) | ~9.93[4] |
| Apparent magnitude (V) | ~9.16[4] |
| Apparent magnitude (J) | 7.905±0.026}[5] |
| Apparent magnitude (H) | 7.572±0.038[5] |
| Apparent magnitude (K) | 7.488±0.018[5] |
| B−V color index | 0.773[2] |
| Astrometry | |
| Radial velocity (Rv) | −0.56±0.16[1] km/s |
| Proper motion (μ) | RA: −156.561 mas/yr[1] Dec.: −120.231 mas/yr[1] |
| Parallax (π) | 14.5456±0.0202 mas[1] |
| Distance | 224.2 ± 0.3 ly (68.75 ± 0.10 pc) |
| Details | |
| Mass | 1.01[6] M☉ |
| Radius | 1.02[6] R☉ |
| Luminosity | 0.85[7] L☉ |
| Surface gravity (log g) | 4.36[6] cgs |
| Temperature | 5,503[6] K |
| Metallicity [Fe/H] | +0.18[8] dex |
| Rotation | 41 days[9] |
| Rotational velocity (v sin i) | 1.7[8] km/s |
| Age | 5.8[6] Gyr |
| Other designations | |
| CD–44°10569, HD 143361, HIP 78521, SAO 226454 | |
| Database references | |
| SIMBAD | data |
HD 143361 is a star in the southern constellation Norma. With an apparent visual magnitude of 9.20,[2] this star is too dim to be seen with the naked eye. It is close enough to the Earth that its distance can be determined using parallax measurements, yielding a value of 224 light-years (69 parsecs).[1]
This is a G-type main sequence star with a stellar classification of G6 V.[3] It has around 101% of the Sun's mass and is around 5.8 billion years old.[6]
HD 143361 is part of a binary star system. A red dwarf star has a similar distance and similar proper motions with the primary. Its orbit is very wide, as the angular separation of 33 arcminutes translates to a projected separation of 135,000 AU (2.13 light-years).[10]
Planetary system
In October 2008 the exoplanet HD 143361 b was reported to be orbiting this star. This object was detected using the radial velocity method during an astronomical survey conducted by the Magellan Planet Search Program using the MIKE echelle spectrograph on the 6.5-m Magellan II (Clay) telescope.[11] In 2023, the inclination and true mass of HD 143361 b were determined via astrometry.[12]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination (°) |
Radius |
|---|---|---|---|---|---|---|
| b | 4.35+1.2 −0.66 MJ |
1.994±0.018 | 2.8538+0.0031 −0.003 |
0.1938+0.0047 −0.0046 |
55+22 −15 or 125+15 −22 |
— |
See also
References
- ^ a b c d e f g 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.
- ^ a b c Jenkins, J. S.; et al. (July 2008), "Metallicities and activities of southern stars", Astronomy and Astrophysics, 485 (2): 571–584, arXiv:0804.1128, Bibcode:2008A&A...485..571J, doi:10.1051/0004-6361:20078611, S2CID 8813298
- ^ a b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H
- ^ a b "NLTT 41735 -- High proper-motion Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2009-06-10
- ^ a b c Cutri, R. M.; et al. (June 2003), 2MASS All Sky Catalog of point sources, NASA/IPAC, Bibcode:2003tmc..book.....C
- ^ a b c d e f Tejada Arevalo, Roberto A.; Winn, Joshua N.; Anderson, Kassandra R. (2021). "Further Evidence for Tidal Spin-up of Hot Jupiter Host Stars". The Astrophysical Journal. 919 (2): 138. arXiv:2107.05759. Bibcode:2021ApJ...919..138T. doi:10.3847/1538-4357/ac1429.
- ^ De Laverny, Patrick; Ligi, Roxanne; Crida, Aurélien; Recio-Blanco, Alejandra; Palicio, Pedro A. (2025). "The Gaia spectroscopic catalogue of exoplanets and host stars". Astronomy and Astrophysics. 699: A100. arXiv:2505.22205. Bibcode:2025A&A...699A.100D. doi:10.1051/0004-6361/202554739.
- ^ a b Pavlenko, Y. V.; Kaminsky, B. M.; Jenkins, J. S.; Ivanyuk, O. M.; Jones, H. R. A.; Lyubchik, Y. P. (2019). "Masses, oxygen, and carbon abundances in CHEPS dwarf stars". Astronomy and Astrophysics. 621: A112. arXiv:1811.05011. Bibcode:2019A&A...621A.112P. doi:10.1051/0004-6361/201834138.
- ^ Arriagada, Pamela (2011). "Chromospheric Activity of Southern Stars from the Magellan Planet Search Program". The Astrophysical Journal. 734 (1): 70. arXiv:1104.3186. Bibcode:2011ApJ...734...70A. doi:10.1088/0004-637X/734/1/70.
- ^ González-Payo, J.; Caballero, J. A.; Gorgas, J.; Cortés-Contreras, M.; Gálvez-Ortiz, M.-C.; Cifuentes, C. (2024-07-29). "Multiplicity of stars with planets in the solar neighbourhood". Astronomy & Astrophysics. 689: A302. arXiv:2407.20138. Bibcode:2024A&A...689A.302G. doi:10.1051/0004-6361/202450048.
- ^ Minniti, Dante; et al. (2009), "Low-Mass Companions for Five Solar-Type Stars From the Magellan Planet Search Program", The Astrophysical Journal, 693 (2): 1424–1430, arXiv:0810.5348, Bibcode:2009ApJ...693.1424M, doi:10.1088/0004-637X/693/2/1424, S2CID 119224845
- ^ a b Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. 23 (5): 055022. arXiv:2303.12409. Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.
External links
- "HD 143361". Exoplanets. Archived from the original on 2009-11-24. Retrieved 2009-06-10.