LHS 1723

LHS 1723 (GJ 3323) is a nearby red dwarf star (0.164 solar masses) of spectral type M4.0, located in constellation Eridanus at 17.5 light-years from Earth.[1]}

LHS 1723
Observation data
Epoch J2000      Equinox J2000
Constellation Eridanus
Right ascension  05h 01m 57.4261s[1]
Declination −06° 56′ 46.3718″[1]
Apparent magnitude (V) 12.196[2]
Characteristics
Spectral type M4.0Ve[2]
Astrometry
Radial velocity (Rv)39.417[2] km/s
Proper motion (μ) RA: −551.722±0.099[1] mas/yr
Dec.: −533.936±0.083[1] mas/yr
Parallax (π)186.0231 ± 0.0590[1] mas
Distance17.533 ± 0.006 ly
(5.376 ± 0.002 pc)
Other designations
LHS 1723, Gliese 3323, NLTT 14393, 2MASS J05015746-0656459, 1RXS J050157.6-065641
Database references
SIMBADdata

History of observations

The discovery name of this star is LP 656-38,[3] which indicates that its discovery was published between 1963 and 1981 in University of Minnesota, Minneapolis.[4] "LP" means "Luyten, Palomar".

LHS 1723 is known at least from 1979, when catalogues of high proper motion objects LHS and NLTT were published by Willem Jacob Luyten, and this object was included to these catalogues.[5][6]

Distance measurement

In 1982 Wilhelm Gliese published photometric distance of LHS 1723 (161 mas),[7] and in 1991 it was included to the 3rd preliminary version of catalogue of nearby stars by Gliese and Jahreiss as NN 3323 (also designated as GJ 3323) with photometric parallax 163.0±26.0 mas.[8]

Its trigonometric parallax remained unknown until 2006, when it was published by RECONS team. The parallax was 187.92±1.26 mas.[9]

Planetary system

On March 15, 2017, two planets orbiting LHS 1723 were detected by the HARPS telescope.[10] The inner planet, GJ 3323b, may orbit within the circumstellar habitable zone of its star.[11]

The LHS 1723 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 2.02±0.25 M⊕ 0.03282 5.3636±0.0007 0.23±011 — —
c 2.31±0.50 M⊕ 0.1264 40.54±0.21 0.17 — —

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. "LHS 1723". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 December 2016.
  3. Kirkpatrick, J. D.; Gelino, C. R.; Cushing, M. C.; Mace, G. N.; Griffith, R. L.; Skrutskie, M. F.; Marsh, K. A.; Wright, E. L.; Eisenhardt, P. R.; McLean, I. S.; Mainzer, A. K.; Burgasser, A. J.; Tinney, C. G.; Parker, S.; Salter, G. (2012). "Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function". The Astrophysical Journal. 753 (2): 156. arXiv:1205.2122. Bibcode:2012ApJ...753..156K. doi:10.1088/0004-637X/753/2/156.
  4. Dictionary of Nomenclature of Celestial Objects. LP entry. SIMBAD. Centre de Données astronomiques de Strasbourg.
  5. Luyten, Willem Jacob (1979). "LHS 1723". LHS Catalogue, 2nd Edition.
  6. Luyten, Willem Jacob (1979). "NLTT 14393". NLTT Catalogue.
  7. Gliese, W. (1982). "Photometric parallaxes of nearby main-sequence stars with annual proper motion of 0.7 arcsec or more derived from Eggen's B, V and R, I data". Astronomy and Astrophysics Supplement Series. 47 (Mar. 1982): 471–480. Bibcode:1982A&AS...47..471G.
  8. Gliese, W.; Jahreiß, H. (1991). "NN 3323". Preliminary Version of the Third Catalogue of Nearby Stars. Retrieved 2014-11-23.
  9. Henry, T. J.; Jao, Wei-Chun; Subasavage, John P.; Beaulieu, Thomas D.; Ianna, Philip A.; Costa, Edgardo; Méndez, René A. (2006). "The Solar Neighborhood. XVII. Parallax Results from the CTIOPI 0.9 m Program: 20 New Members of the RECONS 10 Parsec Sample" (PDF). The Astronomical Journal. 132 (6): 2360–2371. arXiv:astro-ph/0608230. Bibcode:2006AJ....132.2360H. doi:10.1086/508233.CS1 maint: multiple names: authors list (link)
  10. Astudillo-Defru, N.; et al. (2017). "The HARPS search for southern extra-solar planets. XLI. A dozen planets around the M dwarfs GJ 3138, GJ 3323, GJ 273, GJ 628, and GJ 3293". Astronomy and Astrophysics. 602. A88. arXiv:1703.05386. Bibcode:2017A&A...602A..88A. doi:10.1051/0004-6361/201630153.
  11. Méndez, Abel; Rivera-Valentín, Edgard G. (2017-02-23). "The Equilibrium Temperature of Planets in Elliptical Orbits". The Astrophysical Journal. 837 (1): L1. arXiv:1702.07314. Bibcode:2017ApJ...837L...1M. doi:10.3847/2041-8213/aa5f13. ISSN 2041-8213.


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