18136-1536 BU  131BC

 
 
18H 13M 35.30S -15 35' 53.7" P.A. 310 SEP 6.2 MAG 9.30,11.75
 
 
Coord 2000
18136-1536
Discov num
BU  131
Comp
BC
Coord arcsec 2000
18 13 35.30 -15 35 53.7
Date first
1880
Date last
2005
Obs
17
Pa first
278
Pa last
310
P.A. Now (θ)
310°
Sep first
4.6
Sep last
6.2
Sep. Now (ρ)
6.2"
Mag pri
9.30
Mag sec
11.75
delta mag (ΔM)
2.45
Spectral class
Pri motion ra
Sec motion ra
Pri motion dec
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
18136-1536 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18136-1536 BU 131 AB 1873 2005 39 277 3.2 7.54 9.30 1.76
Show 18136-1536 BU 131 AC 1880 2005 19 299 9.0 7.54 11.75 4.21
Show 18136-1536 FOX 221 AD 1913 2000 5 35 40.4 7.54 12.52 4.98
Show 18136-1536 BU 131 BC 1880 2005 17 310 6.2 9.30 11.75 2.45 <===
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Serpens
Tycho2
6264-01269-1
HD
166962
last precise pa
309.9
last precise sep
6.15