17220+5638 ES 2657AB

 
 
17H 22M 02.03S +56 37' 42.4" P.A. 98 SEP 28.4 MAG 8.60,11.20 SP A3V DIST. 271.74 PC (886.42 L.Y.)
 
 
Coord 2000
17220+5638
Discov num
ES 2657
Comp
AB
Coord arcsec 2000
17 22 02.03 +56 37 42.4
Date first
1907
Date last
2016
Obs
8
Pa first
93
Pa last
98
P.A. Now (θ)
98°
Sep first
30.5
Sep last
28.4
Sep. Now (ρ)
28.4"
Mag pri
8.60
Mag sec
11.20
delta mag (ΔM)
2.6
Spectral class
A3V (white)
Pri motion ra
+004
Sec motion ra
-019
Pri motion dec
-013
Sec motion dec
-034
Notes
U (Proper motion indicates non-physical)
This double is not physical.
 
 
17220+5638 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 30359 17220+5638 ES 2657 AB 1907 2016 8 98 28.4 8.60 11.20 2.60 <===
Show 30359 17220+5638 ES 2657 AC 1907 2016 5 91 39.2 8.60 11.50 2.90
Show 30359 17220+5638 ABH 90 AD 1988 2003 3 114 83.8 8.65 14.67 6.02
Show 17220+5638 ES 2657 BC 1907 2016 8 74 11.7 11.20 11.50 0.30
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Draco
SAO
30359
HIP
84973
Tycho2
3896-01299-1
HD
157787
BD
BD+56 1977
Distance
271.74
Distance ly
886.42
last precise pa
97.5
last precise sep
28.396