HD 43848

Last updated
HD 43848
Observation data
Epoch J2000.0        Equinox J2000.0
Constellation Columba [1]
Right ascension 06h 16m 31.35599s [2]
Declination −40° 31′ 54.8276″ [2]
Apparent magnitude  (V)8.65 [3]
Characteristics
Spectral type K2 IV [4]
Astrometry
Proper motion (μ)RA: +121.719 [2] mas/yr
Dec.: +200.617 [2] mas/yr
Parallax (π)26.7558±0.0804  mas [2]
Distance 121.9 ± 0.4  ly
(37.4 ± 0.1  pc)
Absolute magnitude  (MV)+5.76 [1]
Details
Mass 0.98 [5]   M☉
Radius 0.87 [5]   R☉
Luminosity 0.50 [5]   L☉
Surface gravity (log g)4.55 [5]   cgs
Temperature 5,140 [5]   K
Metallicity [Fe/H]+0.31 [5]   dex
Rotational velocity (v sin i)2.5 [5]  km/s
Age 3.7±1.7 [3]   Gyr
Other designations
CD−40°2356, HIP 29804, LTT 2505, NLTT 16340, SAO 217824 [6]
Database references
SIMBAD data

HD 43848 is a 9th magnitude K-type subgiant star located 122 light-years away in the constellation of Columba. The star is less massive than the Sun.

On October 29, 2008, radial velocity measurements made with the MIKE echelle spectrograph on the 6.5-m Magellan II (Clay) telescope revealed the presence of a companion of at least 25 Jupiter masses orbiting the star. [7] Initially thought to be a brown dwarf, astrometric measurements reveal that the true mass of the object is 120+167
−43 Jupiter masses, implying that it is likely to be a red dwarf star. [8]

See also

References

  1. 1 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. XHIP record for this object at VizieR .
  2. 1 2 3 4 5 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 .
  3. 1 2 Trevisan, M.; et al. (November 2011), "Analysis of old very metal rich stars in the solar neighbourhood", Astronomy & Astrophysics, 535: A42, arXiv: 1109.6304 , Bibcode:2011A&A...535A..42T, doi:10.1051/0004-6361/201016056, S2CID   49565866 . See table 13.
  4. ↑ Gray, R. O.; et al. (October 2003), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I.", The Astronomical Journal, 126 (4): 2048–2059, arXiv: astro-ph/0308182 , Bibcode:2003AJ....126.2048G, doi:10.1086/378365, S2CID   119417105
  5. 1 2 3 4 5 6 7 Fuhrmann, Klaus; Chini, Rolf (2021). "On ancient solar-type stars - II". Monthly Notices of the Royal Astronomical Society. 501 (4): 4903. Bibcode:2021MNRAS.501.4903F. doi: 10.1093/mnras/staa3942 .
  6. ↑ "HD 43848". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2026-01-08.
  7. ↑ 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
  8. ↑ Sozzetti, A.; Desidera, S. (2010), "Hipparcos preliminary astrometric masses for the two close-in companions to HD 131664 and HD 43848. A brown dwarf and a low-mass star", Astronomy and Astrophysics, 509: A103, arXiv: 0909.4454 , Bibcode:2010A&A...509A.103S, doi:10.1051/0004-6361/200912717, S2CID   15419641
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