Astronomy:HD 143361
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Norma |
| Right ascension | 16h 01m 50.34828s[1] |
| Declination | −44° 26′ 04.3434″[1] |
| Apparent magnitude (V) | 9.20[2] |
| Characteristics | |
| 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[1] mas/yr Dec.: −120.231[1] mas/yr |
| Parallax (π) | 14.5456 ± 0.0202[1] mas |
| Distance | 224.2 ± 0.3 ly (68.75 ± 0.10 pc) |
| Details | |
| Mass | 0.93[6] M☉ |
| Temperature | 5,420[7] K |
| Metallicity [Fe/H] | 0.06[2] dex |
| Age | 8.1[7] Gyr |
| Other designations | |
CD–44 10569, HD 143361, HIP 78521, SAO 226454. | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | 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 95% of the Sun's mass and is around 8.1[7] billion years old.
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.[6] In 2023, the inclination and true mass of HD 143361 b were determined via astrometry.[8]
| 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
- List of extrasolar planets
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Jenkins, J. S. et al. (July 2008), "Metallicities and activities of southern stars", Astronomy and Astrophysics 485 (2): 571–584, doi:10.1051/0004-6361:20078611, Bibcode: 2008A&A...485..571J
- ↑ 3.0 3.1 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H
- ↑ 4.0 4.1 "NLTT 41735 -- High proper-motion Star", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+143361, retrieved 2009-06-10
- ↑ 5.0 5.1 5.2 Cutri, R. M. et al. (June 2003), 2MASS All Sky Catalog of point sources, NASA/IPAC, Bibcode: 2003tmc..book.....C
- ↑ 6.0 6.1 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, doi:10.1088/0004-637X/693/2/1424, Bibcode: 2009ApJ...693.1424M
- ↑ 7.0 7.1 7.2 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, doi:10.1051/0004-6361:20035959, Bibcode: 2004A&A...418..989N
- ↑ 8.0 8.1 Xiao, Guang-Yao et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics 23 (5): 055022. doi:10.1088/1674-4527/accb7e. Bibcode: 2023RAA....23e5022X.
External links
Coordinates: 
16h 01m 50.348s, −44° 26′ 04.33″
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