WDS 17572+2400 MCA 50 (HD 163840) : NOTES
 
 
discov_num notes refcode
MCA 50 A close pair of solar-type stars, astrometric binary
Balega et al. (1984) derive probable period of 940 days Bag1984a
Culver et al. (1980 BAAS 12, 250) report this to be a spectroscopic
binary with a period of 2.6 years. Bla1987
Determination of these two old measures resulted from new reduction
techniques developed over the past year; these data were reanalysed
for a joint spectroscopic/speckle analysis of this system. Hrt1992b
All our CCD speckle data for this close system have been reprocessed
and examined. In addition, we have listed 7 negative measures dating
from observations made at the KPNO 2.1-m in the 1970's.
Hartkopf et al. (1994) derive a combined spectroscopic/interferometric Hrt1994
solution.
Hipparcos astrometric solution adopted some elements from the orbit of HIP1997d
McAlister et al. (1995). McA1995
Pourbaix gives combined solution for this resolved SB2, yielding Pbx2000b
orbital parallaxes and component masses.
Orbit determined by fitting revised Hipparcos intermediate astrometric
data. Derived component masses 1.12 +/- 0.17 and 0.72 +/- 0.11 Msun. Ren2010
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 2.29 +/- 0.27, 2.15, and 1.79 Msun, respectively. Mlk2012
Kiefer et al. (2016) generates a combined spectroscopic/astrometric
orbit, yielding masses 1.132 +/- 0.014 and 0.7421 +/- 0.0073 Msun, and
a parallax 36.35 +/- 0.20 mas. Kie2016
 
 
REFERENCES
 
 
refcode metd author reference
Bag1984a S j Balega, Y.Y. & Ryadchenko, V.P. 1984SvAL...10...95B
Bag1984a SvAL 10, 95, 1984
Bla1987 S j Blazit, A. Bonneau, D., & Foy, R. 1987A&AS...71...57B
Bla1987 A&AS 71, 57, 1987
HIP1997d orb - Hipparcos 1997yCat.1239....0E
HIP1997d Hipparcos Catalog, ESA SP-1200, 1997
HIP1997d (DMSA/O Orbital Solutions)
Hrt1992b Sc j Hartkopf, W.I., McAlister, H.A., & Franz, O.G. 1992AJ....104..810H
Hrt1992b AJ 104, 810, 1992
Hrt1994 Sc j Hartkopf, W.I., McAlister,H.A., Mason, B.D., Barry, D.J., Turner, N., & Fu, H.-H. 1994AJ....108.2299H
Hrt1994 AJ 108, 2299, 1994
Kie2016 orb - Kiefer, F., Halbwachs, J.-L., Arenou, F., Pourbaix, D., Famaey, B., Guillout, P., 2016MNRAS.458.3272K
Kie2016 Lebreton, Y., Nebot Gomez-Moran, A., Mazeh, T., Salomon, J.-B., Soubiran, C., &
Kie2016 Tal-Or, L.
Kie2016 MNRAS 458, 3272, 2016
McA1995 orb - McAlister, H.A., Hartkopf, W.I., & Mason, B.D. 1995AJ....110..366M
McA1995 AJ 110, 366, 1995
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Pbx2000b orb - Pourbaix, D. 2000A&AS..145..215P
Pbx2000b A&AS 145, 215, 2000
Ren2010 orb - Ren, S. & Fu, Y. 2010AJ....139.1975R
Ren2010 AJ 139, 1975, 2010
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17572+2400 MCA 50 2003 22 180 0.1 6.30 7.90 G2V+K2V NOD 175714.34+235944.6
17572+2400 MCA 50 2007 23 157 0.1 6.30 7.90 G2V+K2V NOD 175714.34+235944.6
17572+2400 MCA 50 2012 29 163 0.1 6.30 7.90 G2V+K2V NO 175714.34+235944.6

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