20190+2121 J  3074

 
 
20h 18m 49.10s +21 22' 05.4" P.A. 331 sep 7.8 mag 12.30,12.45
 
 
Coord 2000
20190+2121
Discov num
J  3074
Comp
Coord arcsec 2000
20 18 49.10 +21 22 05.4
Date first
1892
Date last
2015
Obs
14
Pa first
333
Pa last
331
P.A. Now (θ)
331°
Sep first
8.0
Sep last
7.8
Sep. Now (ρ)
7.8"
Mag pri
12.30
Mag sec
12.45
delta mag (ΔM)
0.15
Spectral class
Pri motion ra
+000
Sec motion ra
+000
Pri motion dec
-006
Sec motion dec
-008
Notes
B (Blue magnitudes)
rPM=0.25 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
331.4
Precise sep
7.766
Constellation
Sagitta
Gaia DR2
43967525760
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20190+2121 J 3074 2006 7 330 8.0 12.30 12.45 DB 201849.10+212205.4
20190+2121 J 3074 2010 9 332 7.8 12.30 12.45 B 201849.10+212205.4
20190+2121 J 3074 2015 10 331 7.8 12.30 12.45 B 201849.10+212205.4

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