HR 511

HR 511
	Location of HR 511 (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Cassiopeia
Right ascension	01h 47m 44.83s
Declination	+63° 51′ 09.0″
Apparent magnitude (V)	5.63
Characteristics
Spectral type	K0 V
U−B color index	+0.40
B−V color index	+0.80
Astrometry
Radial velocity (Rv)	+1.41 km/s
Proper motion (μ)	RA: +582.03±0.35 mas/yr ; Dec.: −246.93±0.43 mas/yr
Parallax (π)	99.33 ± 0.53 mas
Distance	32.8 ± 0.2 ly ; (10.07 ± 0.05 pc)
Absolute magnitude (MV)	5.61
Details
Mass	0.825±0.021 M☉
Radius	0.819±0.024 R☉
Luminosity	0.516±0.010 L☉
Temperature	5407±4.0 K
Metallicity	95.5%
Metallicity [Fe/H]	−0.02 dex
Rotation	21.67 days
Rotational velocity (v sin i)	2 km/s
Age	2.3-4 Gyr
Other designations
	V987 Cassiopeiae, BD+63°238, GJ 75, HD 10780, HIP 8362, HR 511, LHS 1297, LTT 10619, SAO 11983.
Database references
SIMBAD	data
ARICNS	data

HR 511 (also designated V987 Cassiopeiae and Gliese 75 among others) is an orange dwarf of spectral type K0V in the constellation Cassiopeia. With an apparent magnitude of 5.63,^[2] it is faintly visible to the naked eye. The star is relatively close, 32.8 light years from the Sun.^[1]

This star is estimated to be about the same age as the Sun, with 83% of the mass of the Sun and 82% of the Sun's radius. It has not been identified as a member of any moving star groups. This star has displayed unusual emissions of Ca II and is much more x-ray luminous than the Sun. It is considered a relatively active star.^[9] Based on an iron abundance of [Fe/H] = -0.02, the metallicity of this star appears to be similar to that of the Sun.^[8]

References

^ ^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.Vizier catalog entry
^ ^a ^b ^c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data.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 ^c White, Russel J.; Gabor, Jared M.; Hillenbrand, Lynne A. (June 2007), "High-Dispersion Optical Spectra of Nearby Stars Younger Than the Sun", The Astronomical Journal, 133 (6): 2524–2536, arXiv:0706.0542, Bibcode:2007AJ....133.2524W, doi:10.1086/514336.
^ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
^ ^a ^b Boyajian, Tabetha S.; et al. (February 2012), "Stellar Diameters and Temperatures. I. Main-sequence A, F, and G Stars", The Astrophysical Journal, 746 (1): 101, arXiv:1112.3316, Bibcode:2012ApJ...746..101B, doi:10.1088/0004-637X/746/1/101. See Table 10.
^ Demory, B.-O.; et al. (October 2009), "Mass-radius relation of low and very low-mass stars revisited with the VLTI", Astronomy and Astrophysics, 505 (1): 205–215, arXiv:0906.0602, Bibcode:2009A&A...505..205D, doi:10.1051/0004-6361/200911976
^ Kovtyukh, V. V.; et al. (2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics, 411 (3): 559–564, arXiv:astro-ph/0308429, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378
^ ^a ^b ^c Feltzing, S.; Gonzalez, G. (2001), "The nature of super-metal-rich stars. Detailed abundance analysis of 8 super-metal-rich star candidates", Astronomy and Astrophysics, 367 (1): 253–265, Bibcode:2001A&A...367..253F, doi:10.1051/0004-6361:20000477
^ ^a ^b ^c ^d Gaidos, E. J.; Henry, G. W.; Henry, S. M. (2000), "Spectroscopy and Photometry of Nearby Young Solar Analogs", The Astronomical Journal, 120 (2): 1006–1013, Bibcode:2000AJ....120.1006G, CiteSeerX 10.1.1.43.4478, doi:10.1086/301488
^ "HR 511". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-07-09.{{cite web}}: CS1 maint: postscript (link)

External links

"ARICNS 4C00155". ARI Data Base for Nearby Stars. Astronomisches Rechen-Institut. March 4, 1998. Retrieved 2008-02-27.
SolStation

[van_Leeuwen2007-1] ^ ^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.Vizier catalog entry

[Mermilliod1986-2] Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M

[aj133_6_2524-3] White, Russel J.; Gabor, Jared M.; Hillenbrand, Lynne A. (June 2007), "High-Dispersion Optical Spectra of Nearby Stars Younger Than the Sun", The Astronomical Journal, 133 (6): 2524–2536, arXiv:0706.0542, Bibcode:2007AJ....133.2524W, doi:10.1086/514336.

[Holmberg2009-4] Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.

[apj746_1_101-5] Boyajian, Tabetha S.; et al. (February 2012), "Stellar Diameters and Temperatures. I. Main-sequence A, F, and G Stars", The Astrophysical Journal, 746 (1): 101, arXiv:1112.3316, Bibcode:2012ApJ...746..101B, doi:10.1088/0004-637X/746/1/101. See Table 10.

[aaa505_1_205-6] Demory, B.-O.; et al. (October 2009), "Mass-radius relation of low and very low-mass stars revisited with the VLTI", Astronomy and Astrophysics, 505 (1): 205–215, arXiv:0906.0602, Bibcode:2009A&A...505..205D, doi:10.1051/0004-6361/200911976

[aaa411_3_559-7] Kovtyukh, V. V.; et al. (2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics, 411 (3): 559–564, arXiv:astro-ph/0308429, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378

[metal-8] Feltzing, S.; Gonzalez, G. (2001), "The nature of super-metal-rich stars. Detailed abundance analysis of 8 super-metal-rich star candidates", Astronomy and Astrophysics, 367 (1): 253–265, Bibcode:2001A&A...367..253F, doi:10.1051/0004-6361:20000477

[gaidos-9] Gaidos, E. J.; Henry, G. W.; Henry, S. M. (2000), "Spectroscopy and Photometry of Nearby Young Solar Analogs", The Astronomical Journal, 120 (2): 1006–1013, Bibcode:2000AJ....120.1006G, CiteSeerX 10.1.1.43.4478, doi:10.1086/301488

[SIMBAD-10] "HR 511". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-07-09.{{cite web}}: CS1 maint: postscript (link)

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Observation data Epoch J2000 Equinox J2000
Location of HR 511 (circled)
Constellation	Cassiopeia
Right ascension	01^h 47^m 44.83^s^[1]
Declination	+63° 51′ 09.0″^[1]
Apparent magnitude (V)	5.63^[2]
Characteristics
Spectral type	K0 V^[3]
U−B color index	+0.40^[2]
B−V color index	+0.80^[3]
Astrometry

Radial velocity (R_v)	+1.41^[3] km/s
Proper motion (μ)	RA: +582.03±0.35^[1] mas/yr Dec.: −246.93±0.43^[1] mas/yr
Parallax (π)	99.33 ± 0.53 mas^[1]
Distance	32.8 ± 0.2 ly (10.07 ± 0.05 pc)
Absolute magnitude (M_V)	5.61^[4]

Details

Mass	0.825±0.021^[5] `M`_☉
Radius	0.819±0.024^[6] `R`_☉
Luminosity	0.516±0.010^[5] `L`_☉
Temperature	5407±4.0^[7] K
Metallicity	95.5%^[8]
Metallicity [Fe/H]	−0.02^[8] dex
Rotation	21.67 days^[9]
Rotational velocity (v sin i)	2^[9] km/s
Age	2.3-4^[9] Gyr

Other designations
V987 Cassiopeiae, BD+63°238, GJ 75, HD 10780, HIP 8362, HR 511, LHS 1297, LTT 10619, SAO 11983.^[10]
Database references
SIMBAD	data
ARICNS	data