WDS 19264+4928 YSC 134 (HD 183255) : NOTES
 
 
discov_num notes refcode
YSC 134 Metal-poor SB2, spectroscopic orbit published by Tokovinin (1991). Tok1991
An astrometric orbit was deduced from Hipparcos data by Jancart et al. Jnc2005
(2005). The period derived for the visual orbit matches both the
spectroscopic and astrometric solutions within the uncertainty, and
other orbital parametrs are in reasonable agreement with the Tokovinin
solution. The updated Hipparcos parallax (39.98 +/- 0.73 mas),
combined with the orbit, yields a mass sum of 2.0 +/- 0.3 Msun. The
composite spectral type is K3V; a magnitude difference of 0.8 mags
makes the component spectral types roughly K1V + K4V, which suggests
a mass sum of 1.2-1.5 Msun, accounting for the lower metallicity. Hor2012b
For the Horch et al. (2015) combined solution, spectroscopic elements
are fixed to those of Halbwachs et al. (2012). Assigned spectral HJL2012
types are K2V and K4.5V; derived masses 0.74 and 0.68 Msun. Hor2015
Orbital parallax is 42.01 +/- 1.08 mas. Mass of the primary is
0.695 +/- 0.066 \msun. Mass of the secondary is 0.621 +/- 0.058 \msun. Doc2018h
 
 
REFERENCES
 
 
refcode metd author reference
Doc2018h orb - Docobo, J.A., Campo, P.P., Gomez, J. & Horch, E.P. 2018AJ....156..185D
Doc2018h +not AJ 156, 185, 2018
HJL2012 orb - Halbwachs, J.L., Arenou, F., Famaey, B., et al. .
HJL2012 SF2A-2012: Proc. Annual Meeting of the French Society of Astronomy & Astrophysics
HJL2012 87, ed. S. Boissier et al. (Paris: Soc. Francaise d'Astron. et d'Astrop.)
Hor2012b S j Horch, E.P., Howell, S.B., Everett, M.E., & Ciardi, D.R. 2012AJ....144..165H
Hor2012b +orb AJ 144, 165, 2012
Hor2015 S j Horch, E.P., van Altena, W.F., Demargue, P., Howell, S.B., Everett, M.E., 2015AJ....149..151H
Hor2015 +orb Ciardi, D.R., Teske, J.K., Henry, T.J., & Winters, J.G.
Hor2015 AJ 149, 151, 2015
Jnc2005 orb - Jancart, S., Jorrisen, A., Babusiaux, C., & Pourbaix, D. 2005A&A...442..365J
Jnc2005 A&A 442, 365, 2005
Tok1991 orb - Tokovinin, A.A. 1991A&AS...91..497T
Tok1991 A&AS 91, 497, 1991
 
 
DISCOVERER
 
 
idgroup discov author
1 YSC Yale-Southern Connecticut (from additional DD list - see HOR)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19264+4928 YSC 134 2010 2 51 0.0 8.40 9.40 K3V D 192625.57+492748.9
19264+4928 YSC 134 2012 5 200 0.0 8.40 9.40 K3V D 192625.57+492748.9
19264+4928 YSC 134 2014 11 272 0.0 8.40 9.40 K2V K4.5V NO 192625.57+492748.9
19264+4928 YSC 134 2015 15 50 0.0 8.40 9.40 K2V+K4.5V NO 192625.98+492755.1

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