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HD 174430 - Wikipedia

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HD 174430
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Location of HD 174430 and κ Tel (circled)
Constellation	Telescopium
Right ascension	18^h 53^m 12.00295^s^[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 (R_v)	−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 (M_V)	−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]

References

^ ^a ^b ^c ^d ^e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ ^a ^b 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. S2CID 17128864.
^ ^a ^b Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars: Declinations −53° to −40°. Vol. 2. Bibcode:1978mcts.book.....H.
^ 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.
^ ^a ^b 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.
^ ^a ^b 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.
^ ^a ^b ^c ^d ^e 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.
^ ^a ^b 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.
^ ^a ^b 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.
^ ^a ^b 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.
^ ^a ^b Westin, T. N. G. (April 1985). "The local system of early type stars. Spatial extent and kinematics". Astronomy and Astrophysics Supplement Series. 60: 99–134. Bibcode:1985A&AS...60...99W. ISSN 0365-0138. S2CID 119020376.
^ 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.
^ "HD 177430". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved August 5, 2023.
^ Guarinos, J. (February 1995). "VizieR Online Data Catalog: Interstellar matter in the Galactic Disk (Guarinos J., 1992)". VizieR Online Data Catalog: 301V/86. Bibcode:1995yCat.5086....0G.
^ 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.

Constellation of Telescopium

Stars

Bayer	α δ¹ δ² ε ζ η ι κ λ μ ν ξ ρ τ
Variable	RR RS RX BL HO PV PW PZ QQ QS QU QV
HR	6778 6821 6894 6954 6986 7065 7092 7093 7095 7097 7190 7223 7233 7271 7289 7297 7370 7388 7411 7459 7521 7537 7548 7549 7621 7674 7714 7745 7749 7758 7766
HD	168871 173047 177365 181295 191760
Other	KELT-10 Gliese 754 Gliese 784 GJ 1252

Exoplanets	Gliese 754 b Gliese 784 b GJ 1252 b KELT-10b

Star clusters	NGC 6584

Galaxies

NGC	6845 6861
Other	PKS 2014-55