20139+2942 TOB 180

 
 
20h 13m 51.07s +29 42' 17.7" P.A. 299 sep 23.4 mag 9.80,12.40 Sp B5
 
 
Coord 2000
20139+2942
Discov num
TOB 180
Comp
Coord arcsec 2000
20 13 51.07 +29 42 17.7
Date first
1894
Date last
2015
Obs
11
Pa first
300
Pa last
299
P.A. Now (θ)
299°
Sep first
23.2
Sep last
23.4
Sep. Now (ρ)
23.4"
Mag pri
9.80
Mag sec
12.40
delta mag (ΔM)
2.6
Spectral class
B5 (blue-white)
Pri motion ra
+001
Sec motion ra
-003
Pri motion dec
-001
Sec motion dec
-001
Notes
rPM=1.265
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
299.4
Precise sep
23.417
Constellation
Cygnus
Tycho2
2166-00382-1
Gaia DR2
85364574208
HD
333832
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20139+2942 TOB 180 1999 4 299 23.4 9.80 12.40 D 201351.07+294217.7
20139+2942 TOB 180 2002 5 300 23.4 9.80 12.40 D 201351.07+294217.7
20139+2942 TOB 180 2010 6 300 23.4 9.80 12.40 B5 201351.07+294217.7
20139+2942 TOB 180 2015 7 299 23.4 9.80 12.40 B5 201351.07+294217.7

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