20177+3740 SLE 989

 
 
20h 17m 44.92s +37 40' 30.3" P.A. 222 sep 9.3 mag 12.30,13.60
 
 
Coord 2000
20177+3740
Discov num
SLE 989
Comp
Coord arcsec 2000
20 17 44.92 +37 40 30.3
Date first
1985
Date last
2002
Obs
3
Pa first
218
Pa last
222
P.A. Now (θ)
222°
Sep first
9.0
Sep last
9.3
Sep. Now (ρ)
9.3"
Mag pri
12.30
Mag sec
13.60
delta mag (ΔM)
1.3
Spectral class
Pri motion ra
-008
Sec motion ra
-008
Pri motion dec
-016
Sec motion dec
-009
Notes
R (Red magnitudes)
rPM=0.391
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
221.9
Precise sep
9.317
Cdsa2 id
SLE 989
Constellation
Cygnus
Ra deg
20.295811111111114
De deg
37.67508333333333
last precise pa
221.9
last precise sep
9.317
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20177+3740 SLE 989 1998 2 222 9.4 11.90 12.50 D 201744.81+374024.5
20177+3740 SLE 989 2002 3 222 9.3 12.30 13.60 R 201744.92+374030.3

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