20387+3838 STF2708AB

 
 
20h 38m 40.19s +38 38' 06.3" P.A. 323.00 sep 57.9 mag 6.83,8.67 Sp G2V dist. 27.16 pc (88.6 l.y.)
 
 
Coord 2000
20387+3838
Discov num
STF2708
Comp
AB
Coord arcsec 2000
20 38 40.19 +38 38 06.3
Date first
1823
Date last
2018
Obs
133
Pa first
1
Pa last
323
P.A. Now (θ)
323°
Sep first
9.6
Sep last
57.9
Sep. Now (ρ)
57.9"
Mag pri
6.83
Mag sec
8.67
delta mag (ΔM)
1.84
Spectral class
G2V (yellow)
Pri motion ra
+201
Sec motion ra
+024
Pri motion dec
-193
Sec motion dec
-005
Notes
N L U (See Notes, Linear solution, Proper motion indicates non-physical)
Visually invisible, K-band or other infrared star rPM=0.927
This double is not physical.
 
 
20387+3838 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 70321 20387+3838 STF2708 AB 1823 2018 133 323 57.9 6.83 8.67 1.84 <===
Show 70321 20387+3838 STF2708 AC 1878 2015 8 336 40.6 6.83 13.70 6.87
Show 70321 20387+3838 STF2708 AD 1880 2015 16 231 115.6 6.83 11.26 4.43
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
323.2
Precise sep
57.919
Constellation
Cygnus
SAO
70321
HIP
101875
Tycho2
3153-00705-1
Gaia DR2
90317759616
HD
196850
GL
Gl 794.3
BD
BD+38 4172
Distance
27.16
Distance ly
88.6
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20387+3838 STF2708 AB 2004 117 323 53.3 6.83 8.67 G2V NLD 203840.04+383808.0
20387+3838 STF2708 AB 2012 121 323 56.3 6.83 8.67 G2V NLD 203840.04+383808.0
20387+3838 STF2708 AB 2013 122 323 56.0 6.83 8.67 G2V NLD 203840.04+383808.0
20387+3838 STF2708 AB 2014 126 323 56.8 6.83 8.67 G2V NLDU 203840.04+383808.0
20387+3838 STF2708 AB 2016 130 323 57.4 6.83 8.67 G2V NL U 203840.19+383806.3
20387+3838 STF2708 AB 2017 131 323 57.7 6.83 8.67 G2V NL U 203840.19+383806.3
20387+3838 STF2708 AB 2018 133 323 57.9 6.83 8.67 G2V NL U 203840.19+383806.3

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