WDS 17569-3445 JSP 935 (HD 163302) : NOTES
 
 
discov_num notes refcode
JSP 935 Primary is V907 Sco, Algol-type eclipsing binary, period 3.776277d. Zas2013
Triple star. The orbital planes of the B9.5V eclipsing binary and the
more distant companion (per= 99.3 d.) are not coplanar so the orbital
plane of the eclipsing binary shows nodal regression with a period of
68 years. For about one-third of this time, the close binary is
eclipsing, the rest of the time the inclination is too small for
eclipses to occur. The earliest observations of the system in the year
1899 show eclipses; the eclipses stopped about 1918, started again
about 1963, and stopped again in about 1986. Eclipses should start
occurring once again in the year 2030+/-5. (Otero, 1999 AJ 117, 541L).
 
 
REFERENCES
 
 
refcode metd author reference
Zas2013 - Zasche, P. ...................
Zas2013 private communication, 2013
 
 
DISCOVERER
 
 
idgroup discov author
1 JSP Jessup, M.K.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17569-3445 JSP 935 1998 6 288 9.1 8.65 11.40 B9V D 175655.56-344501.2
17569-3445 JSP 935 1999 7 287 9.2 8.65 11.40 B9V D 175655.56-344501.2
17569-3445 JSP 935 2015 8 288 9.2 8.65 11.40 B9V N 175655.56-344501.2

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