HD 130458

HD 130458
Observation data; Epoch J2000 Equinox J2000
Constellation	Apus
Right ascension	14h 53m 13.57117s[1]
Declination	−73° 11′ 24.2613″[1]
Apparent magnitude (V)	5.80[2] (5.94 + 7.68)[3]
Characteristics
Spectral type	G7IIIa + F9IV[3]
U−B color index	+0.42[4]
B−V color index	+0.82[4]
Astrometry
Radial velocity (Rv)	+31.4 ± 2.5[5] km/s
Proper motion (μ)	RA: 17.09±0.44[1] mas/yr ; Dec.: 33.78±0.49[1] mas/yr
Parallax (π)	9.90 ± 0.55 mas[1]
Distance	330 ± 20 ly ; (101 ± 6 pc)
Absolute magnitude (MV)	+0.78
Details
Mass	2.47 ± 0.13[6] M☉
Radius	8.32+0.81; −0.73[6] R☉
Luminosity	54.7[7] L☉
Surface gravity (log g)	2.99 ± 0.10[6] cgs
Temperature	5,291[7] K
Rotational velocity (v sin i)	3.4[2] km/s
Other designations
	17 G. Apodis, CPD−72°1604, GC 19976, HD 130458, HIP 72833, HR 5520, SAO 257206, WDS J14532-7311AB
Database references
SIMBAD	data

HD 130458 (HR 5520) is a double star[3] in the southern circumpolar constellation of Apus. The pair has a combined apparent magnitude of 5.8, making it faintly visible to the naked eye under ideal conditions. Currently located 330 light years away, HD 130458 is receding at a rate of 31.4 km/s.

HD 130458 has a composite spectrum with a stellar classification of G7 IIIa + F9 IV.[3] This indicates that the primary is a late G-type giant star and the secondary a late F-type subgiant. At present the primary has 2.47[6] times the mass of the Sun but has expanded to 8.32[6] times its girth. It radiates at 55[7] times the luminosity of the Sun from its enlarged photosphere at an effective temperature 5,291 K,[7] which gives it a yellow glow. Currently it spins leisurely with a projected rotational velocity of 3.4 km/s,[2] common for giants. As of 2008 , the pair has an angular separation of 2.167″.[3]

References

van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.catalog entry
Torres, C. A. O.; et al. (December 2006). "Search for associations containing young stars (SACY). I. Sample and searching method". Astronomy and Astrophysics. 460 (3): 695–708. arXiv:astro-ph/0609258. Bibcode:2006A&A...460..695T. doi:10.1051/0004-6361:20065602. S2CID 16080025.
Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J
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. ISSN 1063-7737. S2CID 119231169.
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.
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. ISSN 0035-8711.

External links

Image HD 130458

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[van_Leeuwen2007-1] van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.catalog entry

[aaa460_3_695-2] Torres, C. A. O.; et al. (December 2006). "Search for associations containing young stars (SACY). I. Sample and searching method". Astronomy and Astrophysics. 460 (3): 695–708. arXiv:astro-ph/0609258. Bibcode:2006A&A...460..695T. doi:10.1051/0004-6361:20065602. S2CID 16080025.

[Eggleton2008-3] Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.

[clpl4_99-4] Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J

[Gontcharov2006-5] 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. ISSN 1063-7737. S2CID 119231169.

[AP1999-6] 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.

[McDonald2012-7] 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. ISSN 0035-8711.