HD 167818

HD 167818
	Location of HD 167818 (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Sagittarius
Right ascension	18h 18m 03.19136s
Declination	−27° 02′ 33.5149″
Apparent magnitude (V)	4.66
Characteristics
Spectral type	K3II
U−B color index	+1.80
B−V color index	+1.66
Astrometry
Radial velocity (Rv)	-16.90 km/s
Proper motion (μ)	RA: +5.28 mas/ yr ; Dec.: -3.57 mas/ yr
Parallax (π)	4.28 ± 0.33 mas
Distance	760 ± 60 ly ; (230 ± 20 pc)
Absolute magnitude (MV)	-2.17
Details
Mass	6.3 M☉
Luminosity	1,810 L☉
Surface gravity (log g)	2.00 cgs
Temperature	4,030 K
Metallicity [Fe/H]	-0.20 dex
Rotational velocity (v sin i)	2.9 km/s
Other designations
	CD-27°12684, GC 24961, GSC 06852-05204, HIP 89678, HR 6842, HD 167818, SAO 186612
Database references
SIMBAD	data

HD 167818 is a class K3II^[3] (orange bright giant) star in the constellation Sagittarius. Its apparent magnitude is 4.66^[2] and it is approximately 760 light years away based on parallax.^[1]

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. S2CID 18759600. Vizier catalog entry
^ ^a ^b ^c ^d 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. Vizier catalog entry
^ ^a ^b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050. Bibcode: 1995yCat.5050....0H.
^ ^a ^b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode: 2014JAVSO..42..443M. Vizier catalog entry
^ Gontcharov, G. A. (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. S2CID 119231169.
^ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv: 1007.4883. Bibcode: 2011MNRAS.410..190T. doi: 10.1111/j.1365-2966.2010.17434.x. S2CID 118629873. Vizier catalog entry
^ ^a ^b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". 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. S2CID 118665352. Vizier catalog entry
^ Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv: 1605.07384. Bibcode: 2016A&A...591A.118S. doi: 10.1051/0004-6361/201628497. S2CID 119258214.
^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv: 1312.3474. Bibcode: 2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762. S2CID 54046583. Vizier catalog entry

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[vanLeeuwen2007-1] ^ ^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. S2CID 18759600. Vizier catalog entry

[XHIP-2] 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. Vizier catalog entry

[Hoffleit1991-3] Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050. Bibcode: 1995yCat.5050....0H.

[Mallama2014-4] Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode: 2014JAVSO..42..443M. Vizier catalog entry

[Gontcharov2006-5] Gontcharov, G. A. (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. S2CID 119231169.

[Tetzlaff2011-6] Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv: 1007.4883. Bibcode: 2011MNRAS.410..190T. doi: 10.1111/j.1365-2966.2010.17434.x. S2CID 118629873. Vizier catalog entry

[McDonald2012-7] McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". 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. S2CID 118665352. Vizier catalog entry

[Soubiran2016-8] Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv: 1605.07384. Bibcode: 2016A&A...591A.118S. doi: 10.1051/0004-6361/201628497. S2CID 119258214.

[deMedeiros2014-9] De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv: 1312.3474. Bibcode: 2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762. S2CID 54046583. Vizier catalog entry

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Observation data Epoch J2000 Equinox J2000
Location of HD 167818 (circled)
Constellation	Sagittarius
Right ascension	18^h 18^m 03.19136^s^[1]
Declination	−27° 02′ 33.5149″^[1]
Apparent magnitude (V)	4.66^[2]
Characteristics
Spectral type	K3II^[3]
U−B color index	+1.80^[4]
B−V color index	+1.66^[4]
Astrometry

Radial velocity (R_v)	-16.90^[5] km/s
Proper motion (μ)	RA: +5.28^[1] mas/ yr Dec.: -3.57^[1] mas/ yr
Parallax (π)	4.28 ± 0.33 mas^[1]
Distance	760 ± 60 ly (230 ± 20 pc)
Absolute magnitude (M_V)	-2.17^[2]

Details

Mass	6.3^[6] `M`_☉
Luminosity	1,810^[7] `L`_☉
Surface gravity (log g)	2.00^[8] cgs
Temperature	4,030^[7] K
Metallicity [Fe/H]	-0.20^[2] dex
Rotational velocity (v sin i)	2.9^[9] km/s

Other designations
CD-27°12684, GC 24961, GSC 06852-05204, HIP 89678, HR 6842, HD 167818, SAO 186612
Database references
SIMBAD	data

Observation data Epoch J2000 Equinox J2000
Location of HD 167818 (circled)
Constellation	Sagittarius
Right ascension	18^h 18^m 03.19136^s^[1]
Declination	−27° 02′ 33.5149″^[1]
Apparent magnitude (V)	4.66^[2]
Characteristics
Spectral type	K3II^[3]
U−B color index	+1.80^[4]
B−V color index	+1.66^[4]
Astrometry

Radial velocity (R_v)	-16.90^[5] km/s
Proper motion (μ)	RA: +5.28^[1] mas/ yr Dec.: -3.57^[1] mas/ yr
Parallax (π)	4.28 ± 0.33 mas^[1]
Distance	760 ± 60 ly (230 ± 20 pc)
Absolute magnitude (M_V)	-2.17^[2]

Details

Mass	6.3^[6] `M`_☉
Luminosity	1,810^[7] `L`_☉
Surface gravity (log g)	2.00^[8] cgs
Temperature	4,030^[7] K
Metallicity [Fe/H]	-0.20^[2] dex
Rotational velocity (v sin i)	2.9^[9] km/s

Other designations
CD-27°12684, GC 24961, GSC 06852-05204, HIP 89678, HR 6842, HD 167818, SAO 186612
Database references
SIMBAD	data

References

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