16405+4020 ES 1647

 
 
16h 40m 31.47s +40 20' 41.8" P.A. 22 sep 3.3 mag 10.40,11.60
 
 
Coord 2000
16405+4020
Discov num
ES 1647
Comp
Coord arcsec 2000
16 40 31.47 +40 20 41.8
Date first
1917
Date last
2013
Obs
7
Pa first
19
Pa last
22
P.A. Now (θ)
22°
Sep first
3.3
Sep last
3.3
Sep. Now (ρ)
3.3"
Mag pri
10.40
Mag sec
11.60
delta mag (ΔM)
1.2
Spectral class
Pri motion ra
-022
Sec motion ra
Pri motion dec
+010
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
22.2
Precise sep
3.25
Constellation
Hercules
Tycho2
3074-00827-1
last precise pa
22.2
last precise sep
3.25
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
16405+4020 ES 1647 2002 6 22 3.3 10.40 11.60 164031.47+402041.8
16405+4020 ES 1647 2013 7 22 3.3 10.40 11.60 164031.47+402041.8

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