20257+4004 TOR  25AB

 
 
20h 25m 44.56s +40 03' 59.0" P.A. 191 sep 4.7 mag 8.73,10.50 Sp A0
 
 
Coord 2000
20257+4004
Discov num
TOR  25
Comp
AB
Coord arcsec 2000
20 25 44.56 +40 03 59.0
Date first
1977
Date last
2015
Obs
9
Pa first
208
Pa last
191
P.A. Now (θ)
191°
Sep first
10.6
Sep last
4.7
Sep. Now (ρ)
4.7"
Mag pri
8.73
Mag sec
10.50
delta mag (ΔM)
1.77
Spectral class
A0 (white)
Pri motion ra
+000
Sec motion ra
-003
Pri motion dec
-011
Sec motion dec
-015
Notes
N (See Notes)
rPM=0.327
Nature of this double is uncertain.
 
 
20257+4004 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20257+4004 TOR 25 AB 1977 2015 9 191 4.7 8.73 10.50 1.77 <===
Show 20257+4004 POP 199 AC 1892 2015 8 245 59.6 8.73 11.94 3.21
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
190.8
Precise sep
4.669
Constellation
Cygnus
SAO
70001
Tycho2
3156-00461-1
Gaia DR2
87612516608
HD
194720
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20257+4004 TOR 25 AB 1998 4 202 7.3 8.73 10.50 A0 N D 202544.56+400359.0
20257+4004 TOR 25 AB 2010 5 195 5.2 8.73 10.50 A0 N D 202544.56+400359.0
20257+4004 TOR 25 AB 2012 8 192 4.8 8.73 10.50 A0 N 202544.56+400359.0
20257+4004 TOR 25 AB 2015 9 191 4.7 8.73 10.50 A0 N 202544.56+400359.0

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