Gliese 588

Gliese 588 is a nearby red dwarf star of spectral type M2.5, located in the constellation Lupus at 19.34 light-years from Earth.[1]

Gliese 588
Observation data
Epoch J2000      Equinox J2000
Constellation Lupus
Right ascension 15h 32m 12.93186s[1]
Declination −41° 16′ 32.1081″[1]
Apparent magnitude (V) 9.311
Characteristics
Spectral type M2.5V[2]
U−B color index +1.14[3]
B−V color index +1.51[3]
Astrometry
Radial velocity (Rv)15.50 km/s
Proper motion (μ) RA: -1177.12[1] mas/yr
Dec.: -1028.54[1] mas/yr
Parallax (π)168.66 ± 1.30[1] mas
Distance19.3 ± 0.1 ly
(5.93 ± 0.05 pc)
Absolute magnitude (MV)10.44[4]
Details
Mass0.46[4] M☉
Radius0.48[5] R☉
Other designations
CD-40° 9712, GJ 588, HIP 76074, LHS 397, LTT 6210, TYC 7844-1976-1, 2MASS J15321302-4116314[2]
Database references
SIMBADdata

History of observations

According to Luyten's (1979) (catalogue LHS, as well as NLTT), this object was discovered by Innes.[6][7] In 1903–1927 Innes was the director of the Union Observatory (UO), South Africa.

However, in the Ci 20 catalogue (see number 934) this star was designated as "CD -40 7021", not "UO".[8] This may indicate that GJ 588 was first catalogued earlier, in the Cordoba Durchmusterung by John M. Thome in 1894.[9][10] Note: the real CD designation of Gliese 588 is "CD-40 9712",[11] not "CD -40 7021":[8] GJ 588 has a RA of 15 hours, but the real CD -40 7021 has a RA of 11 hours.[12][9]

Planetary system

On 11 June 2019 two planets were detected by radial velocity around Gliese 588 among other 118 planets around M dwarf stars.[13]

The Gliese 588 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 2.4+1.0−0.9 M⊕ 0.049±0.005 5.8084+0.0016−0.0018 0.04+0.25−0.04 — —
c 10.3+6.9−4.9 M⊕ 0.530+0.048−0.054 206.0+2.0−3.3 0.06+0.02−0.06 — —

References
  1. van Leeuwen, F. (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. Vizier catalog entry
  2. "GJ 588". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 25 December 2016.
  3. Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  4. "The One Hundred Nearest Star Systems". 2012. Retrieved 25 December 2016.
  5. Pasinetti Fracassini, L. E.; et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy & Astrophysics. 367 (2): 521–24. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. S2CID 425754.
  6. Luyten, Willem Jacob (1979). "LHS 397". LHS Catalogue, 2nd Edition.
  7. 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. S2CID 119279752.
  8. Porter, J. G.; Yowell, E. J.; Smith, E. S. (1930). "A catalogue of 1474 stars with proper motion exceeding four-tenths year". Publications of the Cincinnati Observatory. 20: 1–32. Bibcode:1930PCinO..20....1P. Page 21 (Ci 20 934).
  9. Thome, J. M. (1894). "Cordoba Durchmusterung declination -32 to -42". Resultados del Observatorio Nacional Argentino. 17: 1–538. Bibcode:1894RNAO...17....1T. Page 468 (CD -40 9712); page 459 (CD -40 7021)
  10. Dictionary of Nomenclature of Celestial Objects. CD entry. SIMBAD. Centre de Données astronomiques de Strasbourg.
  11. Luyten, Willem Jacob (1979). "NLTT 40449". NLTT Catalogue.
  12. Thome, John Macon (1892–1932). "CD -40 7021". Cordoba Durchmusterung.
  13. Barnes, J. R.; Kiraga, M.; Diaz, M.; Berdiñas, Z.; Jenkins, J. S.; Keiser, S.; Thompson, I.; Crane, J. D.; Shectman, S. A. (11 June 2019). "Frequency of planets orbiting M dwarfs in the Solar neighbourhood". arXiv:1906.04644v1 [astro-ph.EP].


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