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GJ 3323

Coordinates:Sky map05h 01m 57.42611s, −06° 56′ 46.3718″
From Wikipedia, the free encyclopedia
Star in the constellation Eridanus
GJ 3323
GJ 3323 is located in the constellation Eridanus
GJ 3323 is located in the constellation Eridanus

GJ 3323
Location of GJ 3323 in the constellationEridanus

Observation data
Epoch J2000      Equinox J2000
ConstellationEridanus
Right ascension05h 01m 57.42613s[1]
Declination−06° 56′ 46.3763″[1]
Apparent magnitude (V)12.20[2]
Characteristics
Spectral typeM4.0Ve[3]
B−Vcolor index+1.72[2]
Astrometry
Radial velocity (Rv)42.309±0.0809[2] km/s
Proper motion (μ)RA: −551.746mas/yr[1]
Dec.: −533.648mas/yr[1]
Parallax (π)186.0466±0.0277 mas[1]
Distance17.531 ± 0.003 ly
(5.3750 ± 0.0008 pc)
Absolute magnitude (MV)13.57[3]
Details[4]
Mass0.1705±0.0044 M☉
Radius0.1862±0.0059 R☉
Luminosity0.003654±0.000052 L☉
Surface gravity (log g)5.07±0.07 cgs
Temperature3,288±51 K
Metallicity [Fe/H]+0.01±0.16 dex
Rotation88.50 d[5]
Rotational velocity (v sin i)1.0±0.8[3] km/s
Other designations
GJ 3323,LHS 1723,NLTT 14393,2MASS J05015746-0656459[6]
Database references
SIMBADdata

GJ 3323 (also known as LHS 1723) is a nearby single[7]star located in theequatorialconstellationEridanus, about 0.4° to the northwest of the naked eye starPsi Eridani.[8] It is invisible to the naked eye with anapparent visual magnitude 12.20.[2]Parallax measurements give a distance estimate of 17.5light-years (5.4parsecs) from theSun.[1] It is drifting further away with aradial velocity of +42.3 km/s.[2] Roughly 104,000 years ago, the star is believed to have come to within 7.34 ± 0.16 light-years of theSolar System.[9]

Thestellar classification of GJ 3323 is M4.0Ve,[3] indicating that it is ared dwarf, withemission lines appearing in itsspectrum.[2] It is fully convective and a source ofX-ray emission.[5] The star has 17% of theSun's mass, 19% of theradius of the Sun, and just 0.4% of theSun's luminosity.[4]

History of observations

[edit]

The discovery name of this star isLP 656-38,[10] which indicates that its discovery was published between 1963 and 1981 inUniversity of Minnesota,Minneapolis.[11] "LP" means "Luyten,Palomar".

GJ 3323 is known at least from 1979, when catalogues of high proper motion objectsLHS andNLTT were published byWillem Jacob Luyten, and this object was included to these catalogues.[12][13]

Distance measurement

[edit]

In 1982,Wilhelm Gliese published a photometric distance of GJ 3323 (161mas),[14] and in 1991 it was included in the 3rd preliminary version of catalogue of nearby stars byGliese andJahreiss as NN 3323 (also designated as GJ 3323) with photometric parallax163.0±26.0 mas.[15]

Its trigonometric parallax remained unknown until 2006, when it was published by theRECONS team. The parallax was187.92±1.26 mas.[16]

Planetary system

[edit]

On March 15, 2017, two planets orbiting GJ 3323 were detected by theHARPS telescope, although the discovery team considers GJ 3323 c a planet candidate.[7] The inner planet, GJ 3323 b, may orbit within thecircumstellar habitable zone of its star.[17]

The GJ 3323 planetary system[7]
Companion
(in order from star)		MassSemimajor axis
(AU)		Orbital period
(days)		EccentricityInclinationRadius
b≥2.02+0.26
−0.25 M🜨		0.03282+0.00054
−0.00056		5.3636±0.00070.23±0.11——
c≥2.31+0.50
−0.49 M🜨		0.1264+0.0021
−0.0022		40.54+0.21
−0.19		0.17+0.21
−0.12		——
Artist's impression and size comparison of the two known planets in the GJ 3323 system with Earth, assuming Earth-like composition

References

[edit]
  1. ^abcdeVallenari, 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 atVizieR.
  2. ^abcdefSoubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars".Astronomy and Astrophysics.616: A7.arXiv:1804.09370.Bibcode:2018A&A...616A...7S.doi:10.1051/0004-6361/201832795.S2CID 52952408.
  3. ^abcdDavison, Cassy L.; et al. (2015). "A 3D Search for Companions to 12 Nearby M-Dwarfs".The Astronomical Journal.149 (3): 106.arXiv:1501.05012.Bibcode:2015AJ....149..106D.doi:10.1088/0004-6256/149/3/106.S2CID 9719725.
  4. ^abSchweitzer, A.; et al. (May 2019). "The CARMENES search for exoplanets around M dwarfs. Different roads to radii and masses of the target stars".Astronomy & Astrophysics.625: 16.arXiv:1904.03231.Bibcode:2019A&A...625A..68S.doi:10.1051/0004-6361/201834965.S2CID 102351979. A68.
  5. ^abWright, Nicholas J.; et al. (September 2018)."The stellar rotation-activity relationship in fully convective M dwarfs".Monthly Notices of the Royal Astronomical Society.479 (2):2351–2360.arXiv:1807.03304.Bibcode:2018MNRAS.479.2351W.doi:10.1093/mnras/sty1670.
  6. ^"LP 656-38".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2020-12-27.
  7. ^abcAstudillo-Defru, Nicola; Forveille, Thierry; Bonfils, Xavier; Ségransan, Damien; Bouchy, François; Delfosse, Xavier; 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.S2CID 119418595.
  8. ^Sinnott, Roger W.; Perryman, Michael A. C. (1997).Millennium Star Atlas. Vol. 1. Sky Publishing Corporation and the European Space Agency. p. 279.ISBN 0-933346-84-0.
  9. ^Bobylev, V. V. (November 2010). "Stars outside the Hipparcos list closely encountering the Solar system".Astronomy Letters.36 (11):816–822.arXiv:1009.4856.Bibcode:2010AstL...36..816B.doi:10.1134/S1063773710110071.S2CID 118512652.
  10. ^Kirkpatrick, J. Davy; et al. (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.S2CID 119279752.
  11. ^Dictionary of Nomenclature of Celestial Objects.LP entry.SIMBAD.Centre de Données astronomiques de Strasbourg.
  12. ^Luyten, Willem Jacob (1979)."LHS 1723".LHS Catalogue, 2nd Edition.
  13. ^Luyten, Willem Jacob (1979)."NLTT 14393".NLTT Catalogue.
  14. ^Gliese, W. (March 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.47:471–480.Bibcode:1982A&AS...47..471G.
  15. ^Gliese, W.; Jahreiß, H. (1991)."NN 3323".Preliminary Version of the Third Catalogue of Nearby Stars. Retrieved2014-11-23.
  16. ^Henry, T. J.; et al. (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.S2CID 15002841.
  17. ^"Open Exoplanet Catalogue - GJ 3323 b".www.openexoplanetcatalogue.com. Retrieved2024-03-09.
Primary membertype
Celestial objects by systems. Secondary members are listed in small print.
    0–10ly→
Main-sequence
stars
A-type
G-type
M-type
(red dwarfs)
Brown dwarfs
L-type
  • Luhman 16 (6.5029±0.0011 ly)
  • T-type brown dwarf B
Sub-brown dwarfs
androgue planets
Y-type
← 10–15ly→
Subgiant stars
F-type
Main-sequence
stars
G-type
  • Tau Ceti (11.9118±0.0074 ly)
  • 4 (8?) planets: (b), (c), (d), e, f, g, h, (i)
K-type
M-type
(red dwarfs)
Degenerate
stars
White dwarfs
Brown dwarfs
T-type
← 15–20ly    
Subgiant stars
G-type
Main-sequence
stars
A-type
G-type
K-type
M-type
(red dwarfs)
Degenerate
stars
White dwarfs
Brown dwarfs
L-type
T-type
Y-type
Sub-brown dwarfs
androgue planets
Y-type
Italic are systems without knowntrigonometric parallax.
Stars
Bayer
Flamsteed
Variable
HR
HD
Other
Exoplanets
Nebulae
NGC
Galaxies
NGC
Other
Galaxy clusters
Astronomical events
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