20401+3044 ROE  15AB

 
 
20h 40m 07.24s +30 44' 28.2" P.A. 249.00 sep 7.6 mag 11.27,13.30 Sp A0
 
 
Coord 2000
20401+3044
Discov num
ROE  15
Comp
AB
Coord arcsec 2000
20 40 07.24 +30 44 28.2
Date first
1900
Date last
2014
Obs
8
Pa first
253
Pa last
249
P.A. Now (θ)
249°
Sep first
7.3
Sep last
7.6
Sep. Now (ρ)
7.6"
Mag pri
11.27
Mag sec
13.30
delta mag (ΔM)
2.03
Spectral class
A0 (white)
Pri motion ra
+004
Sec motion ra
-003
Pri motion dec
-006
Sec motion dec
-013
Notes
rPM=0.742
Nature of this double is uncertain.
 
 
20401+3044 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20401+3044 TDT2457 Aa,Ab 1991 2016 3 139 0.9 11.27 11.48 0.21
Show 20401+3044 ROE 15 AB 1900 2014 8 249 7.6 11.27 13.30 2.03 <===
Show 20401+3044 ROE 15 AC 1900 2014 9 257 30.4 11.27 11.54 0.27
Quadruple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
248.8
Precise sep
7.555
Constellation
Cygnus
Tycho2
2686-00543-1
Gaia DR2
87224808320
HD
334900
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20401+3044 ROE 15 AB 1909 1 251 5.5 11.28 13.30 A0 204007.25+304428.0
20401+3044 ROE 15 AB 1998 2 249 7.5 11.27 13.30 A0 D 204007.24+304428.2
20401+3044 ROE 15 AB 2002 3 249 7.5 11.27 13.30 A0 D 204007.24+304428.2
20401+3044 ROE 15 AB 2010 4 249 7.5 11.27 13.30 A0 204007.24+304428.2
20401+3044 ROE 15 AB 2014 8 249 7.6 11.27 13.30 A0 204007.24+304428.2

If you need more information about this double, apply for a data request form to the WDS.