HD 174430

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HD 174430
Telescopium constellation map.svg
Red circle.svg
Location of HD 174430 and κ Tel (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 18h 53m 12.00295s [1]
Declination −51° 55′ 53.1748″ [1]
Apparent magnitude  (V)6.29±0.01 [2]
Characteristics
Spectral type B3/5 III [3]
B−V color index −0.09 [4]
Astrometry
Radial velocity (Rv)−23.0±4.3 [5]  km/s
Proper motion (μ)RA: +2.869  mas/yr [1]
Dec.: −12.640  mas/yr [1]
Parallax (π)2.8731 ± 0.0531  mas [1]
Distance 1,140 ± 20  ly
(348 ± 6  pc)
Absolute magnitude  (MV)−1.80 [6]
Details
Mass 4.05 [7]   M☉
Radius 5.72±0.29 [8]   R☉
Luminosity 696 [9]   L☉
Surface gravity (log g)3.56 [7]   cgs
Temperature 14,824 [10]   K
Metallicity [Fe/H]−0.01 [7]   dex
Age 76 [11]   Myr
Other designations
32 G. Telescopii [12] , CD−52°8861, CPD−52°11273, GC  25871, HD  174430, HIP  92687, HR  7093, SAO  245783 [13]
Database references
SIMBAD data

HD 174430, also designated as HR 7093 or rarely 32 G. Telescopii, is a solitary blue-hued star located in the southern constellation Telescopium near Kappa Telescopii. It has an apparent magnitude of 6.29, [2] placing it near the limit for naked eye, even under ideal conditions. The object is located relatively far at a distance of 1,140 light-years based on Gaia DR3 parallax measurements, [1] but it is drifitng closer with a heliocentric radial velocity of −23  km/s . [5] At its current distance, HD 174430's brightness is diminished by 0.32 magnitudes due to interstellar extinction [14] and it has an absolute magnitude of −1.80. [6]

HD 174430 has a stellar classification of B3/5 III, [3] indicating that it is an evolved B-type star with the characteristics of a B3 and B5 giant star. It has also been given a less evolved class of B6 V. [15] It has 4.05 times the mass of the Sun [7] and 5.72 times the radius of the Sun. [8] It radiates 696 times the luminosity of the Sun [9] from its photosphere at an effective temperature of 14,824  K . [10] HD 174430 has a near solar metallicity of [Fe/H] = −0.01 [7] and it is estimated to be 76 million years old. [11]

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<span class="mw-page-title-main">HD 172991</span> Hot/cold binary; Corona Australis

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<span class="mw-page-title-main">QQ Telescopii</span> Delta Scuti variable; Telescopium

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<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 192827</span> Suspected variable; Telescopium

HD 192827, also known as HR 7745 or rarely 83 G. Telescopii, is a solitary red hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.28, placing it near the limit for naked eye visibility. The object is located relatively far at a distance of 1,320 light years based on Gaia DR3 parallax measurements, but it is approaching with a heliocentric radial velocity of −43.7 km/s. At its current distance, HD 192827's brightness is diminished by 0.19 magnitudes due to interstellar dust and it has an absolute magnitude of −1.07.

<span class="mw-page-title-main">34 Leonis Minoris</span> Star in the constellation Leo Minor

34 Leonis Minoris, also known as HD 91365 or 11 H. Leonis Minoris is a solitary star located in the northern constellation Leo Minor. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.58. Gaia DR3 parallax measurements imply a distance of 510 light-years, and it is currently receding with a poorly constrained heliocentric radial velocity of 7 km/s. At its current distance, 34 LMi's brightness is diminished by interstellar extinction of 0.16 magnitudes and it has an absolute magnitude of −1.02.

<span class="mw-page-title-main">HD 176425</span> A-type dwarf; Corona Australis

HD 176425, also known as HR 7177 or rarely 38 G. Coronae Australis, is a solitary, bluish-white hued star located in the southern constellation Corona Australis. It has an apparent magnitude of 6.21, placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 358 light-years, and it is currently drifting closer with a heliocentric radial velocity of −12.8 km/s. At its current distance, HD 176425's brightness is diminished by an interstellar extinction factor of 0.27 magnitudes and it has an absolute magnitude of +0.75.

<span class="mw-page-title-main">HD 33541</span> Spectroscopic binary; Camelopardalis

HD 33541, also known as HR 1683, is a white-hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.83, making it faintly visible to the naked eye. Gaia DR3 parallax measurements imply a distance of 358 light years and it is currently receding with a heliocentric radial velocity of 9.9 km/s. At its current distance HD 33541's brightness is diminished by 0.16 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.58.

<span class="mw-page-title-main">HD 27322</span> A-type dwarf; Camelopardalis

HD 27322, also known as HR 1342, is a binary star located in the northern circumpolar constellation Camelopardalis. The visible component is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.92. The object is located relatively close at a distance of 313 light-years based on Gaia DR3 parallax measurements, and it is drifting closer with a heliocentric radial velocity of approximately −13 km/s. At its current distance, HD 27322's brightness is diminished by 0.24 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.98.

<span class="mw-page-title-main">HD 28780</span> A-type star in the constellation Camelopardalis

HD 28780, also known as HR 1440, is a solitary white-hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.91, making it faintly viisble to the naked eye under ideal conditions. Gaia DR3 parallax measurements imply a distance of 488 light-years, and it is currently drifting closer with a heliocentric radial velocity of −22.6 km/s. At its current distance, HD 28780's brightness is diminished by 0.33 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.26.

References

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  4. ↑ Corben, P. M. (April 1971). "Photoelectric Magnitudes and Colours for Bright Southern Stars". Monthly Notes of the Astronomical Society of South Africa. 30 (4): 37. Bibcode:1971MNSSA..30...37C. ISSN   0024-8266.
  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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  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 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv: 1208.2037 . Bibcode:2012MNRAS.427..343M. doi: 10.1111/j.1365-2966.2012.21873.x . eISSN   1365-2966. ISSN   0035-8711. S2CID   118665352.
  10. 1 2 Philip, A. G. D.; Egret, D. (May 1980). "An analysis of the Hauck-Mermillod catalogue of homogeneous four-color data. II". Astronomy and Astrophysics Supplement Series. 40: 199–205. Bibcode:1980A&AS...40..199P. ISSN   0365-0138.
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  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.
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  15. ↑ Cucchiaro, A.; Macau-Hercot, D.; Jaschek, M.; Jaschek, C. (October 1977). "Spectral classification from the ultraviolet line features of S2/68 spectra. II. Late B-type stars". Astronomy and Astrophysics Supplement Series. 30: 71–79. Bibcode:1977A&AS...30...71C. ISSN   0365-0138.
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