HD 154972

Last updated
HD 154972
Apus constellation map.svg
Red circle.svg
location of HD 154972 on the map (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Apus
Right ascension 17h 16m 35.64850s [1]
Declination −74° 31′ 58.8407″ [1]
Apparent magnitude  (V)6.23±0.01 [2]
Characteristics
Spectral type A0 V [3]
U−B color index +0.00 [4]
B−V color index −0.01 [4]
Astrometry
Radial velocity (Rv)−3.1±2 [5]  km/s
Proper motion (μ)RA: −23.266  mas/yr [1]
Dec.: −53.910  mas/yr [1]
Parallax (π)9.6961 ± 0.0359  mas [1]
Distance 336 ± 1  ly
(103.1 ± 0.4  pc)
Absolute magnitude  (MV)+1.11 [6]
Details
Mass 2.56+0.39
−0.29 [7]   M☉
Radius 2.08±0.11 [8]   R☉
Luminosity 42 [1]   L☉
Surface gravity (log g)4.24±0.06 [7]   cgs
Temperature 9,772+228
−222 [9]   K
Metallicity [Fe/H]−0.11 [10]   dex
Age 330±2 [11]   Myr
Other designations
56 G. Apodis [12] , CD−74°1187, CPD−74°1610, FK5  3398, GC  23219, HD  154972, HIP  84510, HR  6373, SAO  257478 [13]
Database references
SIMBAD data

HD 154972, also known as HR 6373 or rarely 56 G. Apodis, is a solitary, bluish-white-hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.23, [2] placing it near the limit for naked eye visibility. Gaia DR3 parallax measurements place the object 336 light years away, [1] and it is currently drifting closer with a heliocentric radial velocity of −3.1  km/s . [5] At its current distance, HD 154972's brightness is diminished by 0.23 magnitudes due to extinction from interstellar dust. [14] It has an absolute magnitude of +1.11. [6]

This is an ordinary A-type main-sequence star with a stellar classification of A0 V. [3] Paunzen et al. (2001) lists it as a potential λ Boötis star. [15] It has 2.56 times the mass of the Sun [7] and 2.08 times its solar radius. [8] It radiates 42 times the luminosity of the Sun [1] from its photosphere at an effective temperature of 9,772  K . [9] It is estimated to be 330 million years old [11] and is slightly metal deficient [10] (78% solar abundance).

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<span class="mw-page-title-main">HD 76236</span> Star in the constellation Chamaeleon

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<span class="mw-page-title-main">HD 198716</span> Star in the constellation of Microscopium

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<span class="mw-page-title-main">HD 118285</span> SPB star in the constellation Chamaeleon.

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<span class="mw-page-title-main">HD 31134</span> Star in the constellation of Camelopardalis

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<span class="mw-page-title-main">HD 101917</span> High proper motion star

HD 101917, also designated as HR 4509, or rarely 34 G. Chamaeleontis, is a solitary star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.38, placing it near the limit for naked eye visibility. The object is located relatively close at a distance of 185 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 33 km/s. At its current distance, HD 101917's brightness is diminished by 0.28 magnitudes due to interstellar dust. It has an absolute magnitude of +2.69.

<span class="mw-page-title-main">HD 170873</span> K-type giant; Telescopium

HD 170873, also known as HR 6954 or rarely 19 G. Telescopii, is a solitary orange-hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.20, placing it near the limit for naked eye visibility. Gaia DR3 parallax measurements imply a distance of 551 light years and it is currently receding with a heliocentric radial velocity of 23.8 km/s. At its current distance, HD 170873's brightness is diminished by 0.39 magnitudes due to interstellar dust, and it has an absolute magnitude of −0.31.

<span class="mw-page-title-main">HD 186756</span> K-type giant; Telescopium

HD 186756, also known as HR 7521 or rarely 68 G. Telescopii, is a solitary orange hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.25, placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 743 light years; it is currently approaching with a heliocentric radial velocity of −21.2 km/s. At its current distance, HD 186756's brightness is diminished by 0.34 magnitudes due to extinction from interstellar dust and it has an absolute magnitude of −0.96.

<span class="mw-page-title-main">HD 169853</span> Am star; Corona Australis

HD 169853, also known as HR 6910 or rarely 9 G. Coronae Australis, is a solitary star located in the southern constellation Corona Australis. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.62. Gaia DR3 parallax measurements imply a distance of 391 light years, and it is currently approaching the Solar System with a heliocentric radial velocity of −21.3 km/s. At its current distance, HD 169853's brightness is diminished by 0.36 magnitudes due to extinction from interstellar dust and it has an absolute magnitude of +0.13.

<span class="mw-page-title-main">HD 170384</span> A-type dwarf; Corona Australis

HD 170384, also known as HR 6931 or rarely 11 G. Coronae Australis, is a solitary white-hued star located in the southern constellation Corona Australis. It has an apparent magnitude of 6.02, making it barely visible to the naked eye, even under ideal conditions. The object is located relatively close at a distance of 229.1 light-years based on Gaia DR3 parallax measurements and it is drifting closer with a heliocentric radial velocity of −11.4 km/s. At its current distance, HD 170384's brightness is diminished by interstellar extinction of 0.28 magnitudes and it has an absolute magnitude of +1.86.

References

  1. 1 2 3 4 5 6 7 8 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 Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations −90° to −53°. Bibcode:1975mcts.book.....H.
  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. 1 2 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 3 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 . eISSN   1538-3881. hdl: 1721.1/124721 . S2CID   166227927.
  8. 1 2 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". 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.
  9. 1 2 Allende Prieto, C.; Lambert, D. L. (December 1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv: astro-ph/9911002 . Bibcode:1999A&A...352..555A. ISSN   0004-6361.
  10. 1 2 Anders, F.; et al. (February 2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv: 2111.01860 . Bibcode:2022A&A...658A..91A. doi: 10.1051/0004-6361/202142369 . eISSN   1432-0746. ISSN   0004-6361.
  11. 1 2 Gontcharov, G. A. (November 2012). "Spatial distribution and kinematics of OB stars". Astronomy Letters. 38 (11): 694–706. arXiv: 1606.09028 . Bibcode:2012AstL...38..694G. doi:10.1134/S1063773712110035. eISSN   1562-6873. ISSN   1063-7737. S2CID   255202762.
  12. ↑ 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.
  13. ↑ SIMBAD, HD 154972 (accessed 20 September 2015)
  14. ↑ 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.
  15. ↑ Paunzen, E.; Duffee, B.; Heiter, U.; Kuschnig, R.; Weiss, W. W. (July 2001). "A spectroscopic survey for λ Bootis stars". Astronomy & Astrophysics. 373 (2): 625–632. Bibcode:2001A&A...373..625P. doi: 10.1051/0004-6361:20010630 . eISSN   1432-0746. ISSN   0004-6361.
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