HD 115004

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HD 115004
Observation data Epoch J2000 Equinox J2000
Constellation	Canes Venatici
Right ascension	13^h 13^m 42.94245^s^[1]
Declination	+40° 09′ 10.3802″^[1]
Apparent magnitude (V)	4.94^[2]
Characteristics
Spectral type	G8.5 III CN0.5^[3]
B−V color index	1.061±0.002^[2]
Astrometry

Radial velocity (R_v)	−22.10±0.14^[2] km/s
Proper motion (μ)	RA: −51.21^[1] mas/yr Dec.: +14.75^[1] mas/yr
Parallax (π)	7.10 ± 0.24 mas^[1]
Distance	460 ± 20 ly (141 ± 5 pc)
Absolute magnitude (M_V)	−0.80^[2]

Details^[4]

Mass	3.17±0.26 `M`_☉
Radius	22.89±0.85 `R`_☉
Luminosity	241.7±17.3 `L`_☉
Surface gravity (log g)	2.23±0.05 cgs
Temperature	4,761±24 K
Metallicity [Fe/H]	−0.10±0.10 dex
Rotational velocity (v sin i)	5.8^[5] km/s
Age	440±130 Myr

Other designations
BD+40° 2633, HD 115004, HIP 64540, HR 4997, SAO 44519^[6]
Database references
SIMBAD	data

HD 115004 is a single^[7] star in the northern constellation of Canes Venatici. It is faintly visible to the naked eye with an apparent visual magnitude of 4.94.^[2] Based upon an annual parallax shift of 7.10±0.24 mas,^[1] it is located around 460 light years from the Sun. The star is moving closer with a heliocentric radial velocity of −22 km/s.^[2] HD 115004 will make its closest approach in about 1.7 million years at a separation of around 390 ly (119.45 pc).^[2]

This is an evolved giant star, most likely (97% chance) on the horizontal branch,^[4] with a stellar classification of G8.5 III CN0.5.^[3] The suffix notation indicates a mild overabundance of the CN molecule in the stellar atmosphere. It has an estimated 3.2 times the mass of the Sun and, at the age of 440 million years, has expanded to 23 times the Sun's radius. The star is radiating around 242 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,761 K.^[4]

References

[edit]

^ ^a ^b ^c ^d ^e ^f 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.
^ ^a ^b ^c ^d ^e ^f ^g Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
^ ^a ^b Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
^ ^a ^b ^c Reffert, Sabine; et al. (2015), "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity", Astronomy & Astrophysics, 574: A116, arXiv:1412.4634, Bibcode:2015A&A...574A.116R, doi:10.1051/0004-6361/201322360, hdl:10722/215277, S2CID 59334290.
^ De Medeiros, J. R.; et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics, 363: 239–243, arXiv:astro-ph/0010273, Bibcode:2000A&A...363..239D.
^ "HD 115004". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-06-07.
^ 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.

Constellation of Canes Venatici

Stars

Bayer	α¹ α² (Cor Caroli) β (Chara)
Flamsteed	4 5 6 10 19 20 21 24 25
Variable	R Y (La Superba) RS AM AW BH DG
HR	4997
Other	Gliese 521 HAT-P-12 HAT-P-36 (Tuiren) CWISE J1249+3621

Exoplanets	HAT-P-12b

Star clusters	Messier 3

Galaxies

Messier	51 a (Whirlpool Galaxy) b 63 94 106
NGC	4111 4138 4145 4151 4163 4183 4214 4217 4242 4244 4395 4399 4400 4401 4449 4485 4490 4534 4618 4625 4627 4631 4656 4657 4707 4800 4861 5002 5003 5005 5023 5033 5112 5223 5229 5238 5273 5371 5394
Numbered	I II
Other	3C 285 3C 286 3C 288 DDO 169 IC 883 IC 4182 IC 4271 I Zwicky 36 KKR 03 4C +41.26 TON 618

Galaxy clusters	Canes II Group M51 Group M94 Group NGC 4631 Group

Astronomical events	GRB 090429B SN 1994I SN 2005cs SN 2008ax