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HD 196050 is a triple star[8][3] system located in the southern constellation of Pavo. This system has an apparent magnitude of 7.50[2] and the absolute magnitude is 4.01.[2] It is located at a distance of 112 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +61 km/s.[2] It is also called by the Hipparcos number 101806.

HD 196050
Observation data
Epoch J2000      Equinox J2000
Constellation Pavo
Right ascension 20h 37m 51.70984s[1]
Declination −60° 38′ 04.1473″[1]
Apparent magnitude (V) 7.50[2] + 10.62[3] + 15.6[3]
Characteristics
Spectral type G3V[4] + M1.5-M4.5 + M2.5-M5.5[3]
B−V color index 0.667±0.010[2]
Astrometry
Radial velocity (Rv)+61.37±0.14[2] km/s
Proper motion (μ) RA: −191.122±0.061[1] mas/yr
Dec.: −64.922±0.054[1] mas/yr
Parallax (π)19.7051 ± 0.0394 mas[1]
Distance165.5 ± 0.3 ly
(50.7 ± 0.1 pc)
Absolute magnitude (MV)4.01[2]
Details[5]
A
Mass1.18±0.02[1] M☉
Radius1.46+0.02
−0.03 R☉
Luminosity2.213+0.007
−0.006[1] L☉
Surface gravity (log g)4.32 cgs
Temperature5,834+55
−52[1] K
Metallicity [Fe/H]0.34±0.06 dex
Rotation16.0 d[6]
Rotational velocity (v sin i)3.0 km/s
Age2.5±1.3 Gyr
Other designations
CPD−61° 6497, HD 196050, HIP 101806, SAO 254837, PPM 364690, WDS J20379-6038AB[7]
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

Characteristics


The primary component is a G-type main-sequence star with a stellar classification of G3V.[4] It has a quiescent chromosphere and does not appear to be variable.[8] The star has 18%[1] more mass than the Sun and a 46% greater size. It is around 2.5 billion years old with a higher than solar metallicity, and is spinning with a projected rotational velocity of 3 km/s.[5] The star is radiating 2.21[1] times the luminosity of the Sun from its photosphere at an effective temperature of 5.834 K.[1]

A faint co-moving companion star, designated component B, was detected based on observations during 2003–2004,[8] located 10.80″[3] to the south of the primary component. This corresponds to a projected separation of 7,511±22 AU.[8] The star is magnitude 10.62[3] A third companion, component C, was discovered in 2007, located about 0.4″ from component B.[9] It has a visual magnitude of 15.6.[3]


Planetary system


In 2002, the Anglo-Australian Planet Search team announced the discovery of an extrasolar planet orbiting the star.[10] The discovery was independently confirmed by the Geneva Extrasolar Planet Search team.[6]

The HD 196050 planetary system[11]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥2.90±0.26 MJ 2.54±0.15 1,378±21 0.228±0.038 — —

See also



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. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  3. Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
  4. Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
  5. Chavero, C.; et al. (August 2019). "Emerging trends in metallicity and lithium properties of debris disc stars". Monthly Notices of the Royal Astronomical Society. 487 (3, p.3162-3177): 3162–3177. arXiv:1905.12066. Bibcode:2019MNRAS.487.3162C. doi:10.1093/mnras/stz1496. S2CID 168169634.
  6. Mayor, M.; et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics. 415 (1): 391–402. arXiv:astro-ph/0310316. Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250. S2CID 5233877.
  7. "HD 196050". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-25.
  8. Mugrauer, M.; et al. (2005). "Four new wide binaries among exoplanet host stars". Astronomy and Astrophysics. 440 (3): 1051–1060. arXiv:astro-ph/0507101. Bibcode:2005A&A...440.1051M. doi:10.1051/0004-6361:20042297. S2CID 14065040.
  9. Roell, T.; et al. (June 2012). "Extrasolar planets in stellar multiple systems". Astronomy & Astrophysics. 542: 10. arXiv:1204.4833. Bibcode:2012A&A...542A..92R. doi:10.1051/0004-6361/201118051. S2CID 55755453. A92.
  10. Jones, Hugh R. A.; et al. (December 2002). "Extrasolar planets around HD 196050, HD 216437 and HD 160691". Monthly Notices of the Royal Astronomical Society. 337 (4): 1170–1178. arXiv:astro-ph/0206216. Bibcode:2002MNRAS.337.1170J. doi:10.1046/j.1365-8711.2002.05787.x. S2CID 119520409.
  11. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. S2CID 119067572.

Further reading



На других языках

[de] HD 196050

HD 196050 ist ein Stern im Sternbild Pfau. Von unserem Sonnensystem ist der Stern rund 160 Lichtjahre (50 Parsec) weit entfernt. Die scheinbare Helligkeit beträgt 7,5 mag, der Spektraltyp ist G3 V. Der Stern ist in Größe und Leuchtkraft unserer Sonne ähnlich (nur etwa 10–20 % größer als die Sonne), jedoch um einiges jünger. 2002 wurde um HD 196050 ein Planet entdeckt.
- [en] HD 196050


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