HD 221246

HD 221246
Observation data; Epoch J2000 Equinox J2000
Constellation	Andromeda
Right ascension	23h 30m 07.4133s
Declination	+49° 07′ 59.3232″
Apparent magnitude (V)	6.17
Characteristics
Spectral type	K3III
U−B color index	1.71
B−V color index	1.46
Astrometry
Radial velocity (Rv)	−8.41±0.15 km/s
Proper motion (μ)	RA: 28.741±0.100 mas/yr ; Dec.: 3.180±0.087 mas/yr
Parallax (π)	3.2290 ± 0.0642 mas
Distance	1,010 ± 20 ly ; (310 ± 6 pc)
Details
Radius	48 R☉
Surface gravity (log g)	2.32 cgs
Temperature	4228±125 K
Metallicity [Fe/H]	−0.24±0.10 dex
Other designations
	BD+48° 4070, FK5 3882, HD 221246, HIP 115996, HR 8925, NGC 7686 1, SAO 53088.
Database references
SIMBAD	data

HD 221246 or NGC 7686 1 is a star in open cluster NGC 7686, and it belongs to the northern constellation of Andromeda. With an apparent visual magnitude of 6.17,^[2] it can be viewed by the naked eye only under very favourable conditions. It has a spectral classification of K3III, meaning it is an evolved orange giant star.^[3] Parallax measurements place this star about 1,000 light years away from the solar system.^[1]

References

^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b ^c ^d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
^ ^a ^b Shenavrin, V. I.; et al. (2011). "Search for and study of hot circumstellar dust envelopes". Astronomy Reports. 55 (1): 31–81. Bibcode:2011ARep...55...31S. doi:10.1134/S1063772911010070. S2CID 122700080.
^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (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.
^ Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy & Astrophysics, 367 (2): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754
^ ^a ^b ^c Röck, B.; Vazdekis, A.; Peletier, R. F.; Knapen, J. H.; Falcón-Barroso, J. (2015). "Stellar population synthesis models between 2.5 and 5 μm based on the empirical IRTF stellar library". Monthly Notices of the Royal Astronomical Society. 449 (3): 2853. arXiv:1505.01837. Bibcode:2015MNRAS.449.2853R. doi:10.1093/mnras/stv503.

External links

Image NGC 7686 1

[Gaia-1] ^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[clpl4_99-2] Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J

[Shenavrin_2011-3] Shenavrin, V. I.; et al. (2011). "Search for and study of hot circumstellar dust envelopes". Astronomy Reports. 55 (1): 31–81. Bibcode:2011ARep...55...31S. doi:10.1134/S1063772911010070. S2CID 122700080.

[rv-4] Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (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.

[cadars-5] Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy & Astrophysics, 367 (2): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754

[Rock2015-6] Röck, B.; Vazdekis, A.; Peletier, R. F.; Knapen, J. H.; Falcón-Barroso, J. (2015). "Stellar population synthesis models between 2.5 and 5 μm based on the empirical IRTF stellar library". Monthly Notices of the Royal Astronomical Society. 449 (3): 2853. arXiv:1505.01837. Bibcode:2015MNRAS.449.2853R. doi:10.1093/mnras/stv503.

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Observation data Epoch J2000 Equinox J2000
Constellation	Andromeda
Right ascension	23^h 30^m 07.4133^s^[1]
Declination	+49° 07′ 59.3232″^[1]
Apparent magnitude (V)	6.17^[2]
Characteristics
Spectral type	K3III^[3]
U−B color index	1.71^[2]
B−V color index	1.46^[2]
Astrometry

Radial velocity (R_v)	−8.41±0.15^[4] km/s
Proper motion (μ)	RA: 28.741±0.100^[1] mas/yr Dec.: 3.180±0.087^[1] mas/yr
Parallax (π)	3.2290 ± 0.0642 mas^[1]
Distance	1,010 ± 20 ly (310 ± 6 pc)

Details

Radius	48^[5] `R`_☉
Surface gravity (log g)	2.32^[6] cgs
Temperature	4228±125^[6] K
Metallicity [Fe/H]	−0.24±0.10^[6] dex

Other designations
BD+48° 4070, FK5 3882, HD 221246, HIP 115996, HR 8925, NGC 7686 1, SAO 53088.
Database references
SIMBAD	data