19 Leonis Minoris

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19 Leonis Minoris
Leo Minor constellation map.svg
Red circle.svg
Location of 19 LMi (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Leo Minor
Right ascension 09h 57m 41.0544s [1]
Declination +41° 03′ 20.275″ [1]
Apparent magnitude  (V)5.10±0.01 [2]
Characteristics
Spectral type F6 V [3]
U−B color index 0.00 [4]
B−V color index +0.46 [4]
Astrometry
Radial velocity (Rv)−8.6±2.6 [5]  km/s
Proper motion (μ)RA: −116.432  mas/yr [1]
Dec.: −25.860  mas/yr [1]
Parallax (π)34.5809 ± 0.0926  mas [1]
Distance 94.3 ± 0.3  ly
(28.92 ± 0.08  pc)
Absolute magnitude  (MV)+2.86 [6]
Orbit [7]
Period (P)9.2835  d
Eccentricity (e)0.048 [8]
Periastron epoch (T)2,443,858.21  JD
Argument of periastron (ω)
(primary)		351 [8] °
Semi-amplitude (K1)
(primary)		18.9 km/s
Semi-amplitude (K2)
(secondary)		25.3 km/s
Details
A
Mass 1.29±0.19 [9]   M☉
Radius 2±0.1 [9]   R☉
Luminosity 6.41±0.04 [1]   L☉
Surface gravity (log g)3.98±0.03 [10]   cgs
Temperature 6,483±80 [11]   K
Metallicity [Fe/H]+0.09 [11]   dex
Rotational velocity (v sin i)5 [12]  km/s
Age 2.474 [1]   Gyr
B
Mass 1.01 [13]   M☉
Other designations
19 LMi, AG+41°966, BD+41°2033, FK5  374, GC  13700, GJ  3574, HD  86146, HIP  48833, HR  3928, SAO  43115 [14]
Database references
SIMBAD data

19 Leonis Minoris (19 LMi) is a spectroscopic binary [15] located in the northern constellation Leo Minor. It has an apparent magnitude of 5.1, [2] making it one of the brighter members of the constellation. The system is relatively close at a distance of 94 light years [1] but is drifitng closer with a heliocentric radial velocity of 8.6  km/s . [5]

This spectroscopic binary can be classified as single lined [3] because only the primary's spectrum can be observed clearly, with it having a stellar classification of F6 V. [3] This makes it an ordinary F-type main-sequence star. The companion is probably a G-type main-sequence star of G0, [7] having a mass 101% that of the Sun. [13] The pair have a relatively circular orbit of about 9 days. [13]

19 LMi has 129% the mass of the Sun [9] and an effective temperature of 6,483  K , giving a yellow white hue. The object is somewhat evolved at an age of 2.5 billion years, [1] having a slightly enlarged radius of 2  R☉ [9] and a luminosity of 6.4  L☉, [1] high for its class. 19 LMi has an iron abundance 123% that of the Sun, [11] making it slighly metal enriched. It spins modestly with a projected rotational velocity of 5  km/s . [12]

Related Research Articles

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<span class="mw-page-title-main">HD 90132</span> Solitary White-hued star and high proper motion star

HD 90132 is a solitary white hued star located in the southern constellation Antlia. It has an apparent magnitude of 5.33, making it one of the brighter members of this generally faint constellation. The star is relatively close at a distance of 135 light years but is receding with a heliocentric radial velocity of 17 km/s.

<span class="mw-page-title-main">HD 1</span> First star in the Henry Draper catalogue

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HD 27022, also known as HR 1327, is a star located in the northern circumpolar constellation Camelopardalis. The object has also been designated as 20 H. Camelopardalis, but is not commonly used in modern times. It has an apparent magnitude of 5.27, allowing it to be faintly visible to the naked eye. Based on parallax measurements from Gaia DR3, the star has been estimated to be 347 light years away. It appears to be approaching the Solar System, having a heliocentric radial velocity of −19.5 km/s.

HD 46588 is a star in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.44, allowing it to be faintly seen with the naked eye. The object is relatively close at a distance of only 59 light years but is receding with a heliocentric radial velocity of 15 km/s.

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HD 10800, also known as HR 512 or Gliese 67.1, is a triple star located in the southern circumpolar constellation Octans. It has a combined apparent magnitude of 5.87, allowing it to be faintly seen with the naked eye. The system is relatively close at a distance of 88.1 light years but is drifting closer with a heliocentric radial velocity −1.1 km/s.

<span class="mw-page-title-main">42 Leonis Minoris</span> Solitary B dwarf; Leo Minor

42 Leonis Minoris is a solitary, bluish-white hued star located in the northern constellation Leo Minor. It has a visual apparent magnitude of 5.35, allowing it to be faintly seen with the naked eye. Parallax measurements place it at a distance of 412 light years. The object has a heliocentric radial velocity of 12 km/s, indicating that it is drifting away from the Solar System.

HD 208741, also known as HR 8380, is a yellowish-white hued star located in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.91, making it faintly visible to the naked eye. Parallax measurements place it at a distance of 211 light years, and it is currently receding with a heliocentric radial velocity of 8 km/s.

HD 33519, also known as HR 1682, is a probable spectroscopic binary located in the southern circumpolar constellation Mensa. It is one of the stars near the limit of naked eye visibility, having an apparent magnitude of 6.28. The system is relatively far at a distance of 940 light years but is approaching with a heliocentric radial velocity of −2.5 km/s. However, this value is poorly constrained.

HD 183552, also known as HR 7411, is a probable spectroscopic binary located in the southern constellation Telescopium. The system has a combined apparent magnitude of 5.74, allowing it to be faintly visible to the naked eye. Based on parallax measurements from the Gaia spacecraft, it is estimated to be 337 light years distant. The value is horribly constrained, but it appears to receding with a radial velocity of 14 km/s.

HD 58425, also known as HR 2830, is an astrometric binary located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orang point of light at an apparent magnitude of 5.64. Based on parallax measurements from Gaia DR3, the system is estimated to be 470 light years away from Earth. It appears to be rapidly receding from the Sun, having a heliocentric radial velocity of 58.6 km/s. HD 58425 is listed as 54 Ursae Majoris in Johann Hevelius' catalogue, but this was dropped after the official IAU's official constellation borders were drawn.

HR 8526, also known as HD 212168, is the primary of a triple star located in the southern circumpolar constellation Octans. The star and its companion have apparent magnitudes of 6.12 and 9.36 respectively.The system is located relatively close at a distance of 76 light years based on Gaia DR3 parallax measurements, but is receding with a heliocentric radial velocity of 15 km/s.

<span class="mw-page-title-main">8 Leonis Minoris</span> Suspected variable; M-type giant

8 Leonis Minoris is a solitary, red hued star located in the northern constellation Leo Minor. It has an apparent magnitude 5.37, making it faintly visible to the naked eye. Based on parallax measurements from the Gaia satellite, the object is estimated to be 492 light years distant. It is receding with a heliocentric radial velocity of 40 km/s. At its current distance, 8 LMi is diminshed by 0.12 magnitudes due to interstellar dust.

<span class="mw-page-title-main">23 Leonis Minoris</span> High proper motion star; A0 dwarf

23 Leonis Minoris is a solitary, bluish-white hued star located in the northern constellation Leo Minor. It is positioned 7° south and 11" west from β Leonis Minoris. It is rarely called 7 H. Leonis Minoris, which is its Hevelius designation.

<span class="mw-page-title-main">40 Leonis Minoris</span> Astrometric binary; Leo Minor

40 Leonis Minoris is a white hued star located in the northern constellation Leo Minor. It is rarely called 14 H. Leonis Minoris, which is the designation given by Polis astronomer Johann Hevelius.

References

  1. 1 2 3 4 5 6 7 8 9 10 Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics . arXiv: 2208.00211 . doi: 10.1051/0004-6361/202243940 . Gaia DR3 record for this source at VizieR.
  2. 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361.
  3. 1 2 3 Abt, Helmut A. (23 December 2008). "Mk Classifications of Spectroscopic Binaries". The Astrophysical Journal Supplement Series. 180 (1): 117–118. Bibcode:2009ApJS..180..117A. doi: 10.1088/0067-0049/180/1/117 . eISSN   1538-4365. ISSN   0067-0049.
  4. 1 2 Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  5. 1 2 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. eISSN   1562-6873. ISSN   1063-7737. S2CID   119231169.
  6. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN   1562-6873. ISSN   1063-7737. S2CID   119257644.
  7. 1 2 Batten, A. H.; Morbey, C. L. (February 1980). "The orbital elements of 19 Leo Minoris". Publications of the Astronomical Society of the Pacific. 92: 98. Bibcode:1980PASP...92...98B. doi: 10.1086/130625 . eISSN   1538-3873. ISSN   0004-6280.
  8. 1 2 Kraicheva, Z.; Popova, E.; Tutukov, A.; Yungelson, L. (July 1980). "Catalogue of physical parameters of spectroscopic binary stars". Bulletin d'Information du Centre de Donnees Stellaires. 19: 71. Bibcode:1980BICDS..19...71K. ISSN   1169-8837.
  9. 1 2 3 4 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . ISSN   0004-6256.
  10. ↑ Ramírez, I.; Allende Prieto, C.; Lambert, D. L. (29 January 2013). "Oxygen Abundances in Nearby FGK Stars and the Galactic Chemical Evolution of the Local Disk and Halo". The Astrophysical Journal. 764 (1): 78. arXiv: 1301.1582 . Bibcode:2013ApJ...764...78R. doi: 10.1088/0004-637X/764/1/78 . eISSN   1538-4357. ISSN   0004-637X.
  11. 1 2 3 Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (June 2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s): Improved astrophysical parameters for the Geneva-Copenhagen Survey⋆". Astronomy & Astrophysics. 530: A138. arXiv: 1103.4651 . Bibcode:2011A&A...530A.138C. doi: 10.1051/0004-6361/201016276 . ISSN   0004-6361.
  12. 1 2 Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S.; Mowlavi, N. (May 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of ~14 000 F and G dwarfs". Astronomy & Astrophysics. 418 (3): 989–1019. arXiv: astro-ph/0405198 . Bibcode:2004A&A...418..989N. doi: 10.1051/0004-6361:20035959 . ISSN   0004-6361.
  13. 1 2 3 Tokovinin, Andrei (14 March 2014). "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs". The Astronomical Journal. 147 (4): 87. arXiv: 1401.6827 . Bibcode:2014AJ....147...87T. doi: 10.1088/0004-6256/147/4/87 . eISSN   1538-3881. ISSN   0004-6256.
  14. ↑ "19 LMi". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved July 25, 2022.
  15. ↑ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (23 August 2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy & Astrophysics. 424 (2): 727–732. arXiv: astro-ph/0406573 . Bibcode:2004A&A...424..727P. doi: 10.1051/0004-6361:20041213 . eISSN   1432-0746. ISSN   0004-6361.
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