WDS 20329+4154 BLA 8 (HD 195987) : NOTES
 
 
discov_num notes refcode
BLA 8 Hipparcos astrometric solution adopted some elements from the orbit of HIP1997d
Duquennoy & Mayor (1991). Duq1991
Combined spectroscopic/interferometric orbit by Torres et al. (2002), Trr2002
including visibility data from the Palomar Testbed Interferometer.
Additional elements for this metal-poor binary are:
gamma = -5.841 0.037 km/sec
KA = 28.926 0.046 km/sec
KB = 36.72 0.21 km/sec
dm = 1.056 0.013 mag (K band)
1.154 0.065 mag (H band)
parallax = 46.08 0.27 mas
masses = 0.844 0.018 Msun
0.6650 0.0079 Msun
Orbit determined by fitting revised Hipparcos intermediate astrometric
data. Derived component masses 0.84 +/- 0.05 and 0.67 +/- 0.04 Msun. Ren2010
Improved resolved SB2 orbit for this pair. Kie2018
A: Teff = 5296 +/- 19 K, M = 0.8420 +/- 0.0014 \msun.
B: Teff = 4360 +/- 87 K, M = 0.66201 +/- 0.00076 \msun.
Orbital parallax = 46.131 +/- 0.084 mas.
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 1.58 +/- 0.05, 1.73, and 0.88 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Duq1991 - Duquennoy, A. & Mayor, M. 1991A&A...248..485D
Duq1991 A&A 248, 485, 1991
HIP1997d orb - Hipparcos 1997yCat.1239....0E
HIP1997d Hipparcos Catalog, ESA SP-1200, 1997
HIP1997d (DMSA/O Orbital Solutions)
Kie2018 orb - Kiefer, F., Halbwachs, J.-L., Lebreton, Y., Soubiran, C., Arenou, F., Pourbaix, D., 2018MNRAS.474..731K
Kie2018 +not Famaey, B., Guillout, P., Ibata, R. & Mazeh, T.
Kie2018 MNRAS 474, 731, 2018
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Ren2010 orb - Ren, S. & Fu, Y. 2010AJ....139.1975R
Ren2010 AJ 139, 1975, 2010
Trr2002 orb - Torres, G., Boden, A.F., Latham, D.W., Pan, W., & Stefanik, R.P. 2002AJ....124.1716T
Trr2002 AJ 124, 1716, 2002
 
 
DISCOVERER
 
 
idgroup discov author
1 BLA Blazit, A., Bonneau, D., Koechlin, L. & Labeyrie, A.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20329+4154 BLA 8 1986 1 170 0.0 7.09   G9V NO 203251.64+415354.5
20329+4154 BLA 8 2007 2 296 0.0 7.09   G9V NOD 203251.64+415354.5
20329+4154 BLA 8 2014 5 336 0.0 7.40 9.10 G9V NO 203251.64+415354.5

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