17220+5638 ES 2657 BC

 
 
17h 22m 05.43s +56° 37' 39.5" P.A. 73.00 sep 11.7 mag 11.20,11.50
 
 
Coord 2000 17220+5638 Discov num ES 2657 Comp BC Coord arcsec 2000 17 22 05.43 +56 37 39.5
Date first 1907 Date last 2016 Obs 13
Pa first 76 Pa last 73.4 P.A. Now (θ) 73.4°
Sep first 11.8 Sep last 11.736 Sep. Now (ρ) 11.736"
Mag pri 11.20 Mag sec 11.50 delta mag (ΔM) 0.3 Spectral class
Pri motion ra -019 Sec motion ra -011
Pri motion dec -034 Sec motion dec -034
Notes
rPM=0.205 (< 0.3, Physical double)
This double is physical.
 
 
17220+5638 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 157787 30359 17 22 02 +56 37 42 ES 2657 AB 2016 12 97 28.4 8.60 11.20 2.60
Show 30359 17 22 02 +56 37 42 ES 2657 AC 2016 9 90 39.2 8.60 11.50 2.90
Show 30359 17 22 02 +56 37 42 ABH 90 AD 2015 7 114 83.7 8.65 14.67 6.02
Show 17 22 05 +56 37 40 ES 2657 BC 2016 13 73 11.7 11.20 11.50 0.30 <===
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Draco Gaia DR2 1420829882224623488