HD 118508

HD 118508
Observation data; Epoch J2000 Equinox J2000
Constellation	Boötes
Right ascension	13h 36m 59.08233s
Declination	+24° 36′ 47.8687″
Apparent magnitude (V)	5.8
Characteristics
Evolutionary stage	red giant
Spectral type	M2III
U−B color index	+1.85
B−V color index	+1.58
Variable type	suspected
Astrometry
Radial velocity (Rv)	−35.69±0.18 km/s
Proper motion (μ)	RA: −26.654 mas/yr ; Dec.: −2.803 mas/yr
Parallax (π)	5.9122 ± 0.0860 mas
Distance	552 ± 8 ly ; (169 ± 2 pc)
Absolute magnitude (MV)	−0.431
Details
Mass	1.1 M☉
Radius	49 R☉
Luminosity	324 L☉
Surface gravity (log g)	1.04 cgs
Temperature	3,594 K
Metallicity [Fe/H]	+0.44 dex
Other designations
	BD+25 2652, FK5 3085, HD 118508, HIP 66417, HR 5123, SAO 82905, NSV 6342
Database references
SIMBAD	data

HD 118508 is a suspected variable star in the northern constellation of Boötes. Its apparent magnitude may vary with an amplitude of 0.04, discovered during a search for small-amplitude red variables.^[5] It is a red giant about 552 light years away.

References[edit]

^ ^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 Famaey, B.; et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430: 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272, S2CID 17804304
^ 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
^ ^a ^b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
^ ^a ^b Percy, John R.; Au, Winnie (November 1994), "APT Observations of Small-Amplitude Red Variables", Information Bulletin on Variable Stars, 4114 (4114): 1, Bibcode:1994IBVS.4114....1P
^ Gontcharov, G. A. (2017), "VizieR Online Data Catalog: Tycho-2 red giant branch and carbon stars (Gontcharov, 2011)", VizieR On-line Data Catalog, Bibcode:2017yCat..90370769G
^ ^a ^b ^c ^d Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics, 628: A94, arXiv:1904.11302, Bibcode:2019A&A...628A..94A, doi:10.1051/0004-6361/201935765, S2CID 131780028
^ Stassun K.G.; et al. (October 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, S2CID 166227927
^ McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352

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[dr3-1] 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.

[aa430_165-2] Famaey, B.; et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430: 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272, S2CID 17804304

[mnras389_2_869-3] 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

[MERMILLIOD-4] Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M

[ibvs4114_1-5] Percy, John R.; Au, Winnie (November 1994), "APT Observations of Small-Amplitude Red Variables", Information Bulletin on Variable Stars, 4114 (4114): 1, Bibcode:1994IBVS.4114....1P

[gontcharov2011-6] Gontcharov, G. A. (2017), "VizieR Online Data Catalog: Tycho-2 red giant branch and carbon stars (Gontcharov, 2011)", VizieR On-line Data Catalog, Bibcode:2017yCat..90370769G

[starhorse-7] Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics, 628: A94, arXiv:1904.11302, Bibcode:2019A&A...628A..94A, doi:10.1051/0004-6361/201935765, S2CID 131780028

[ticv8-8] Stassun K.G.; et al. (October 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, S2CID 166227927

[Mcdonald2012-9] McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352

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Observation data Epoch J2000 Equinox J2000
Constellation	Boötes
Right ascension	13^h 36^m 59.08233^s^[1]
Declination	+24° 36′ 47.8687″^[1]
Apparent magnitude (V)	5.8^[2]
Characteristics
Evolutionary stage	red giant
Spectral type	M2III^[3]
U−B color index	+1.85^[4]
B−V color index	+1.58^[4]
Variable type	suspected^[5]
Astrometry

Radial velocity (R_v)	−35.69±0.18^[2] km/s
Proper motion (μ)	RA: −26.654^[1] mas/yr Dec.: −2.803^[1] mas/yr
Parallax (π)	5.9122 ± 0.0860 mas^[1]
Distance	552 ± 8 ly (169 ± 2 pc)
Absolute magnitude (M_V)	−0.431^[6]

Details

Mass	1.1^[7] `M`_☉
Radius	49^[8] `R`_☉
Luminosity	324^[9] `L`_☉
Surface gravity (log g)	1.04^[7] cgs
Temperature	3,594^[7] K
Metallicity [Fe/H]	+0.44^[7] dex

Other designations
BD+25 2652, FK5 3085, HD 118508, HIP 66417, HR 5123, SAO 82905, NSV 6342
Database references
SIMBAD	data