18200+2120 AG  221AB

 
 
18h 20m 02.24s +21 20' 00.7" P.A. 12 sep 1.7 mag 9.90,9.87 Sp F8
 
 
Coord 2000
18200+2120
Discov num
AG  221
Comp
AB
Coord arcsec 2000
18 20 02.24 +21 20 00.7
Date first
1901
Date last
2011
Obs
33
Pa first
15
Pa last
12
P.A. Now (θ)
12°
Sep first
1.3
Sep last
1.7
Sep. Now (ρ)
1.7"
Mag pri
9.90
Mag sec
9.87
delta mag (ΔM)
0.03
Spectral class
F8 (yellow-white)
Pri motion ra
+001
Sec motion ra
+001
Pri motion dec
+023
Sec motion dec
+023
Notes
Nature of this double is uncertain.
 
 
18200+2120 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18200+2120 AG 221 AB 1901 2011 33 12 1.7 9.90 9.87 0.03 <===
Show 18200+2120 AG 221 AC 1904 2015 5 9 9.7 9.90 12.90 3.00
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
Tycho2
1580-01378-2
HD
342090
last precise pa
12.3
last precise sep
1.659
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18200+2120 AG 221 AB 2005 31 12 1.7 9.90 9.87 F8 182002.24+212000.7
18200+2120 AG 221 AB 2010 33 12 1.8 9.90 9.87 F8 182002.24+212000.7
18200+2120 AG 221 AB 2011 34 12 1.7 9.90 9.87 F8 182002.24+212000.7

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