20216+3725 SEI1100AB

 
 
20h 21m 38.68s +37 25' 15.1" P.A. 286 sep 7.2 mag 10.66,11.50 Sp O8V
 
 
Coord 2000
20216+3725
Discov num
SEI1100
Comp
AB
Coord arcsec 2000
20 21 38.68 +37 25 15.1
Date first
1895
Date last
2015
Obs
12
Pa first
290
Pa last
286
P.A. Now (θ)
286°
Sep first
6.6
Sep last
7.2
Sep. Now (ρ)
7.2"
Mag pri
10.66
Mag sec
11.50
delta mag (ΔM)
0.84
Spectral class
O8V (blue)
Pri motion ra
-005
Sec motion ra
-024
Pri motion dec
-004
Sec motion dec
-011
Notes
rPM=0.767
Nature of this double is uncertain.
 
 
20216+3725 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20216+3725 SEI1100 AB 1895 2015 12 286 7.2 10.66 11.50 0.84 <===
Show 20216+3725 SEI1100 AC 1929 2015 10 129 15.4 10.66 11.80 1.14
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
286.3
Precise sep
7.224
Constellation
Cygnus
SAO
69894
Tycho2
2684-00142-1
Gaia DR2
44407221120
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20216+3725 SEI1100 AB 1998 5 287 7.2 10.66 12.20 D 202138.68+372515.1
20216+3725 SEI1100 AB 2002 6 286 7.2 10.66 12.20 D 202138.68+372515.1
20216+3725 SEI1100 AB 2015 7 286 7.2 10.66 12.20 O8V 202138.68+372515.1

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