20421+5013 ES   91BC (AL Scl)

 
 
20h 42m 03.89s +50 13' 44.8" P.A. 247 sep 14.8 mag 11.05,11.66 dist. 271 pc (884 l.y.)
 
 
Coord 2000
20421+5013
Discov num
ES   91
Comp
BC
Coord arcsec 2000
20 42 03.89 +50 13 44.8
Date first
1899
Date last
2016
Obs
12
Pa first
239
Pa last
247
P.A. Now (θ)
247°
Sep first
16.6
Sep last
14.8
Sep. Now (ρ)
14.8"
Mag pri
11.05
Mag sec
11.66
delta mag (ΔM)
0.61
Spectral class
Pri motion ra
-037
Sec motion ra
-010
Pri motion dec
-154
Sec motion dec
-004
Notes
rPM=0.059 (< 0.3, Physical double)
This double is not physical.
 
 
20421+5013 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20421+5013 ES 91 AB 1901 2016 11 189 4.5 11.54 11.70 0.16
Show 20421+5013 ES 91 AC 1901 2016 11 235 17.6 11.54 11.66 0.12
Show 20421+5013 ES 91 BC 1899 2016 12 247 14.8 11.05 11.66 0.61 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name
AL Scl
Spectr
B6V+B8V
Constellation
Sculptor
SAO
214860
HIP
117931
Tycho2
7516-01189-1
HD
224113
HR
9049
CD
CD-3217723
CP
CP-32 6688
Distance
271
Distance ly
884
last precise pa
247.3
last precise sep
14.77
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20421+5013 ES 91 BC 2003 9 247 14.7 9.70 9.80 D 204203.89+501344.8
20421+5013 ES 91 BC 2010 11 239 16.2 11.05 11.66 204203.89+501344.8
20421+5013 ES 91 BC 2016 12 247 14.8 11.05 11.66 204203.89+501344.8

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