18418-1909 J  2221AB

 
 
18h 41m 44.78s -19 09' 14.4" P.A. 255 sep 7.4 mag 10.03,11.70
 
 
Coord 2000
18418-1909
Discov num
J  2221
Comp
AB
Coord arcsec 2000
18 41 44.78 -19 09 14.4
Date first
1942
Date last
1999
Obs
3
Pa first
265
Pa last
255
P.A. Now (θ)
255°
Sep first
5.0
Sep last
7.4
Sep. Now (ρ)
7.4"
Mag pri
10.03
Mag sec
11.70
delta mag (ΔM)
1.67
Spectral class
Pri motion ra
+021
Sec motion ra
-028
Pri motion dec
+009
Sec motion dec
-012
Notes
rPM=1.75
This double is not physical.
 
 
18418-1909 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18418-1909 J 2221 AB 1942 1999 3 255 7.4 10.03 11.70 1.67 <===
Show 18418-1909 J 2221 AC 1942 1999 3 346 18.2 10.03 12.50 2.47
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
254.5
Precise sep
7.444
Constellation
Sagittarius
Tycho2
6288-01767-1
last precise pa
254.5
last precise sep
7.444
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18418-1909 J 2221 AB 1942 1 265 5.0 10.38 12.10 184144.78-190914.4
18418-1909 J 2221 AB 1999 2 255 7.4 10.38 12.10 184144.78-190914.4
18418-1909 J 2221 AB 2010 4 254 7.3 10.03 11.70 184144.78-190914.4

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