HD 201852

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HD 201852
Microscopium constellation map.svg
Red circle.svg
Location of HD 201852 on the map (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Microscopium
Right ascension 21h 13m 18.96155s [1]
Declination −36° 25′ 24.7016″ [1]
Apparent magnitude  (V)5.95±0.01 [2]
Characteristics
Spectral type K0 III [3]
U−B color index +0.74 [4]
B−V color index +0.98 [4]
Astrometry
Radial velocity (Rv)0.4±0.4 [5]  km/s
Proper motion (μ)RA: +33.411  mas/yr [1]
Dec.: +3.122  mas/yr [1]
Parallax (π)8.9286 ± 0.038  mas [1]
Distance 365 ± 2  ly
(112.0 ± 0.5  pc)
Absolute magnitude  (MV)+0.73 [6]
Details
Mass 1.87 [7]   M☉
Radius 9.89±0.50 [8]   R☉
Luminosity 58.0±0.5 [1]   L☉
Surface gravity (log g)2.80±0.08 [9]   cgs
Temperature 4,984±34 [10]   K
Metallicity [Fe/H]−0.02±0.03 [11]   dex
Rotational velocity (v sin i)<1.0 [12]  km/s
Age 1.58 [7]   Gyr
Other designations
57 G. Microscopii [13] , CD−36°14676, CPD−36°9343, GC  29648, HD  201852, HIP  104752, HR  8108, SAO  212800, TIC  159690250 [14]
Database references
SIMBAD data

HD 201852 (HR 8108; 57 G. Microscopii) is a solitary star located in the southern constellation Microscopium. It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.95. [2] Gaia DR3 parallax measurements imply a distance of 365 light-years [1] and it is slowly receding with a heliocentric radial velocity of 0.4  km/s . [5] At its current distance, HD 201852's brightness is diminished by an interstellar extinction of 0.11 magnitudes [15] and it has an absolute magnitude of +0.73. [6]

HD 201852 has a stellar classification of K0 III, [3] indicating that it is an evolved K-type giant that has exhausted hydrogen at its core and left the main sequence. It has 1.87 times the mass of the Sun but at the age of 1.58 billion years, [7] it has expanded to 9.89 times the radius of the Sun. [8] It radiates 58 times the luminosity of the Sun [1] from its enlarged photosphere at an effective temperature of 4,984  K . [10] HD 201852 has a near solar metallicity at [Fe/H] = −0.02 [11] and it spins too slowly for its projected rotational velocity to be measured accurately; it has been given an upper limit of 1  km/s . [12] Based on its kinematics and elemental abundances, HD 201852 is said to be part of the thin disk population. [16]

Related Research Articles

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ι Telescopii, Latinized as Iota Telescopii and abbreviated Iota Tel, is a solitary star located in the southern constellation Telescopium. It is faintly visible to the naked eye as an orange-hued star with an apparent visual magnitude of +4.88. The star is located roughly 377 light years distant from the Solar System based on Gaia DR3 parallax measurements and it is receding with a radial velocity of 22.3 km/s. At its current distance, Iota Tel's brightness is diminished by 0.19 magnitudes due to interstellar dust and it has an absolute magnitude of −0.39.

HD 88836, also known as HR 4019, is a solitary, yellow-hued star located in the southern constellation Antlia. It has an apparent magnitude of 6.32, placing it near the limit for naked eye visibility. Based on an annual parallax shift of 7.019 mas, the object is estimated to be 465 light years away from the Solar System. Its distance from the Sun does not appear to be changing, having a radial velocity of 0 km/s.

HD 190984, also known as HIP 99496, is a star located in the southern circumpolar constellation Pavo, the peacock. It has an apparent magnitude of 8.76, making it readily visible in small telescopes, but not to the naked eye. Based on parallax measurements from the Gaia spacecraft, the object is estimated to be 486 light years away from the Solar System. It appears to be receding with a heliocentric radial velocity of 20.3 km/s.

<span class="mw-page-title-main">Q Scorpii</span> High proper motion binary star system in the constellation of Scorpius

Q Scorpii, also designated as HD 159433, is an astrometric binary located in the southern zodiac constellation Scorpius. It has an apparent magnitude of 4.27, making it readily visible to the naked eye under ideal conditions. It lies in the tail of Scorpius, between the stars λ Scorpii and μ Scorpii and is located 7′ away from the faint globular cluster Tonantzintla 2. Based on parallax measurements from Gaia DR3, the system is estimated to be 158 light years distant, but is approaching the Solar System with a heliocentric radial velocity of −49 km/s.

HD 55151 is a solitary star located in the circumpolar constellation Volans. With an apparent magnitude of 6.47, it is near the limit of naked eye visibility. The star is located 512 light years away from the Solar System, but is drifting closer with a heliocentric radial velocity of -13 km/s.

HD 71863 is a solitary star in the southern circumpolar constellation Volans. It is faintly visible to the naked eye with an apparent magnitude of 5.94 and is located 408 light-years away based on parallax measurements. However, it is receding with a radial velocity of 19.1 km/s.

HD 63513 is a solitary star located in the southern circumpolar constellation Volans. It has an apparent magnitude of 6.38, placing it near the max naked eye visibility. The star is situated at a distance of 634 light years but is receding with a heliocentric radial velocity of 1.4 km/s.

<span class="mw-page-title-main">HD 34266</span> Solitary star in the constellation Columba

HD 34266, also known as HR 1721 is a solitary, yellow hued star located in the southern constellation Columba, the dove. It has an apparent magnitude of 5.73, making it faintly visible to the naked eye under ideal conditions. Based on Gaia DR3 parallax measurements, the object is located 539 light years away. It appears to be drifting away from the Solar System, having a heliocentric radial velocity of 13.2 km/s.

HD 11025 is a suspected astrometric binary in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.67, making it visible to the naked eye if viewed under ideal conditions. Located 378 light years away, it is receding with a heliocentric radial velocity of 18 km/s.

HD 46568 is a solitary star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.25. Parallax measurements place the object at a distance of 284 light years and is currently receding with a heliocentric radial velocity of 39 km/s.

<span class="mw-page-title-main">Lambda Doradus</span> Star in the constellation of Dorado

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HD 222060, also known as HR 8957, is a solitary, orange hued star located in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.98, allowing it to be faintly visible to the naked eye. Based on parallax measurements from GAIA, the object is estimated to be 536 light years distant. It appears to be slowly receding from the Solar System, having a heliocentric radial velocity of 2.3 km/s.

HD 30669 is a yellowish-orange hued star located in the southern constellation Caelum, the chisel. It has an apparent magnitude of 9.11, making it readily visible in small telescopes but not to the naked eye. The object is relatively close at a distance of 188 light years, based on parallax measurements from Gaia DR3. Its distance from the Solar System is rapidly increasing, having a heliocentric radial velocity of 66 km/s.

HD 210056, also known as HR 8432, is a solitary orange hued star located in the southern circumpolar constellation Octans. Eggen (1993) listed it as a member of the old disk population.

<span class="mw-page-title-main">HD 175219</span> K-type giant; Corona Australis

HD 175219, also known as HR 7122, is a solitary, orange hued star located in the southern constellation Corona Australis. It has an apparent magnitude of 5.35, allowing it to be faintly visible to the naked eye. The object is located relatively close at a distance of 314 light years based on Gaia DR3 parallax measurements but is drifting closer with a heliocentric radial velocity of −21.1 km/s. At its current distance, HD 175219's brightness is diminished by 0.26 magnitudes due to interstellar dust. It has an absolute magnitude of +0.57.

<span class="mw-page-title-main">HD 182893</span> Star in the constellation Telescopium

HD 182893, also known as HR 7388 or rarely 60 G. Telescopii, is a solitary, yellowish-orange hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.13, making it barely visible to the naked eye even under ideal conditions. Based on Gaia DR3 parallax measurements, the object is estimated to be 328 light years away. However, it is approaching the Solar System with a heliocentric radial velocity of −27 km/s. At its current distance, HD 182893's brightness is diminished by 0.19 magnitudes due to interstellar dust. It has an absolute magnitude of +1.23.

<span class="mw-page-title-main">HD 189080</span> Star in the constellation of Telescopium

HD 189080, also known as HR 7621 or rarely 74 G. Telescopii, is a solitary orange-hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.18, placing it near the limit for naked eye visibility. Gaia DR3 parallax measurements place it at a distance of 357 light years and it is currently receding rapidly with a heliocentric radial velocity of 66.9 km/s. At its current distance, HD 189080's brightness is diminished by 0.17 magnitudes due to extinction from interstellar dust. It has an absolute magnitude of +1.1.

<span class="mw-page-title-main">HD 185075</span> Star in the constellation Telescopium

HD 185075, also known as HR 7459 or rarely 65 G. Telescopii, is a solitary star located in the southern constellation Telescopium. It has an apparent magnitude of 6.26, placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 422 light years and it is currently receding with a heliocentric radial velocity of 14.8 km/s. At its current distance, HD 185075's brightness is diminished by 0.23 magnitudes due to interstellar dust and it has an absolute magnitude of +0.92.

<span class="mw-page-title-main">HD 179433</span> G-type giant; Corona Australis

HD 179433, also known as HR 7281 or rarely 49 G. Coronae Australis, is a solitary star located in the southern constellation Corona Australis. It is faintly visible to the naked eye as a yellow-hued point of light with an apparent magnitude of 5.91. Gaia DR3 parallax measurements imply a distance of 329 light-years, and it is currently drifting closer with a heliocentric radial velocity of −35.1 km/s. At its current distance, HD 179433's brightness is diminished by interstellar extinction of 0.22 magnitudes and it has an absolute magnitude of +1.11.

Pi<sup>2</sup> Doradus G-type giant in the constellation Dorado

Pi2 Doradus, Latinized from π2 Doradus, is a solitary star located in the southern constellation Doradus. It is faintly visible to the naked eye as a yellow-hued point of light with an apparent magnitude of 5.38. The object is located relatively close at a distance of 277 light-years based on Gaia DR3 parallax measurements, but it is receding with a heliocentric radial velocity of approximately 9.1 km/s. At its current distance, Pi2 Doradus' brightness is diminished by 0.27 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.78.

References

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  3. 1 2 Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Declinations −40° to −26°. Vol. 3. Bibcode:1982mcts.book.....H.
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  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.
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  7. 1 2 3 Bertelli, G.; Bressan, A.; Chiosi, C.; Fagotto, F.; Nasi, E. (August 1994). "Theoretical isochrones from models with new radiative opacities". Astronomy and Astrophysics Supplement Series. 106: 275–302. Bibcode:1994A&AS..106..275B. ISSN   0365-0138. S2CID   122757475.
  8. 1 2 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (April 8, 2004). "The angular sizes of dwarf stars and subgiants: Surface brightness relations calibrated by interferometry". Astronomy & Astrophysics. 426 (1): 297–307. arXiv: astro-ph/0404180 . Bibcode:2004A&A...426..297K. doi: 10.1051/0004-6361:20035930 . eISSN   1432-0746. ISSN   0004-6361. S2CID   6077801.
  9. ↑ Ottoni, G.; Udry, S.; Ségransan, D.; Buldgen, G.; Lovis, C.; Eggenberger, P.; Pezzotti, C.; Adibekyan, V.; Marmier, M.; Mayor, M.; Santos, N. C.; Sousa, S. G.; Lagarde, N.; Charbonnel, C. (January 2022). "CORALIE radial-velocity search for companions around evolved stars (CASCADES): I. Sample definition and first results: Three new planets orbiting giant stars". Astronomy & Astrophysics. 657: A87. arXiv: 2201.01528 . Bibcode:2022A&A...657A..87O. doi: 10.1051/0004-6361/202040078 . eISSN   1432-0746. ISSN   0004-6361. S2CID   245440163.
  10. 1 2 Luck, R. Earle (25 August 2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal. 150 (3): 88. arXiv: 1507.01466 . Bibcode:2015AJ....150...88L. doi:10.1088/0004-6256/150/3/88. eISSN   1538-3881. ISSN   0004-6256. S2CID   118505114.
  11. 1 2 Alves, S.; Benamati, L.; Santos, N. C.; Adibekyan, V. Zh.; Sousa, S. G.; Israelian, G.; De Medeiros, J. R.; Lovis, C.; Udry, S. (11 April 2015). "Determination of the spectroscopic stellar parameters for 257 field giant stars★". Monthly Notices of the Royal Astronomical Society. 448 (3): 2749–2765. arXiv: 1503.02556 . Bibcode:2015MNRAS.448.2749A. doi: 10.1093/mnras/stv189 . ISSN   0035-8711.
  12. 1 2 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars V: Southern stars *". Astronomy & Astrophysics. 561: A126. arXiv: 1312.3474 . Bibcode:2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762 . eISSN   1432-0746. ISSN   0004-6361. S2CID   54046583.
  13. ↑ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
  14. ↑ "HD 201852". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved November 20, 2023.
  15. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160 . Bibcode:2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219 . eISSN   1365-2966. ISSN   0035-8711. S2CID   118879856.
  16. ↑ Adibekyan, V. Zh.; Benamati, L.; Santos, N. C.; Alves, S.; Lovis, C.; Udry, S.; Israelian, G.; Sousa, S. G.; Tsantaki, M.; Mortier, A.; Sozzetti, A.; De Medeiros, J. R. (April 29, 2015). "Chemical abundances and kinematics of 257 G-, K-type field giants. Setting a base for further analysis of giant-planet properties orbiting evolved stars★". Monthly Notices of the Royal Astronomical Society. Oxford University Press (OUP). 450 (2): 1900–1915. arXiv: 1503.08346 . Bibcode:2015MNRAS.450.1900A. doi: 10.1093/mnras/stv716 . ISSN   1365-2966. S2CID   58920318.
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