20181+4044 STF2666CD

 
 
20h 18m 05.63s +40 43' 24.9" P.A. 143 sep 24.2 mag 10.70,11.00 Sp B8V+B9V
 
 
Coord 2000
20181+4044
Discov num
STF2666
Comp
CD
Coord arcsec 2000
20 18 05.63 +40 43 24.9
Date first
1892
Date last
2013
Obs
7
Pa first
144
Pa last
143
P.A. Now (θ)
143°
Sep first
24.4
Sep last
24.2
Sep. Now (ρ)
24.2"
Mag pri
10.70
Mag sec
11.00
delta mag (ΔM)
0.3
Spectral class
B8V+B9V (blue-white/blue-white)
Pri motion ra
-002
Sec motion ra
-002
Pri motion dec
-007
Sec motion dec
-006
Notes
N (See Notes)
rPM=0.137 (< 0.3, Physical double)
This double is physical.
 
 
20181+4044 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 49438 20181+4044 CHR 96 Aa,Ab 1985 2010 25 171 0.0 6.60 6.80 0.20 Y
Show 20181+4044 STF2666 AB 1831 2013 81 246 2.7 5.96 8.24 2.28
Show 20181+4044 STF2666 AC 1887 2006 13 207 34.0 5.96 10.70 4.74
Show 20181+4044 TAR 5 AD 1887 2006 8 181 49.6 5.96 11.00 5.04
Show 20181+4044 STF2666 CD 1892 2013 7 143 24.2 10.70 11.00 0.30 <===
Quintuple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
142.7
Precise sep
24.22
Cdsa2 id
STF 2666 CD
Constellation
Cygnus
Ra deg
20.30156388888889
De deg
40.72358333333334
last precise pa
142.7
last precise sep
24.22
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20181+4044 STF2666 CD 2006 5 143 24.3 11.11 10.40 D 201805.63+404324.9
20181+4044 STF2666 CD 2013 7 143 24.2 10.70 11.00 B8V+B9V N 201805.63+404324.9

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