HD 43848 is a 9th magnitude K-type subgiant star located approximately 123 light-years away in the constellation of Columba. The star is less massive than the Sun.

HD 43848
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Columba
Right ascension 06h 16m 31.36330s[1]
Declination –40° 31′ 54.7121″[1]
Apparent magnitude (V) 8.65[2]
Characteristics
Spectral type K2 IV[3]
Variable type 5.58[2]
Astrometry
Proper motion (μ) RA: +122.02[1] mas/yr
Dec.: +198.32[1] mas/yr
Parallax (π)26.42 ± 0.78 mas[1]
Distance123 ± 4 ly
(38 ± 1 pc)
Details
Mass0.94 ± 0.06[2] M
Surface gravity (log g)4.54 ± 0.04[2] cgs
Temperature5,161 ± 41[2] K
Age3.7 ± 1.7[2] Gyr
Other designations
CD-40° 2356, HIP 29804, LTT 2505, NLTT 16340, SAO 217824.
Database references
SIMBADdata
Exoplanet Archivedata

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.[4] 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.[5]

See also

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References

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  1. ^ a b c d e van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600
  2. ^ a b c d e f 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.
  3. ^ 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
  4. ^ 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
  5. ^ 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