17220+5638 ES 2657AC

 
 
17h 22m 02.03s +56 37' 42.4" P.A. 91 sep 39.2 mag 8.60,11.50 Sp A3V dist. 271.74 pc (886.42 l.y.)
 
 
Coord 2000
17220+5638
Discov num
ES 2657
Comp
AC
Coord arcsec 2000
17 22 02.03 +56 37 42.4
Date first
1907
Date last
2016
Obs
5
Pa first
88
Pa last
91
P.A. Now (θ)
91°
Sep first
41.9
Sep last
39.2
Sep. Now (ρ)
39.2"
Mag pri
8.60
Mag sec
11.50
delta mag (ΔM)
2.9
Spectral class
A3V (white)
Pri motion ra
+004
Sec motion ra
-011
Pri motion dec
-013
Sec motion dec
-034
Notes
rPM=0.722
Nature of this double is uncertain.
 
 
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
 
 
Precise pa
90.8
Precise sep
39.179
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
90.8
last precise sep
39.179
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17220+5638 ES 2657 AC 2000 3 89 39.2 8.60 11.50 A3V D 172202.03+563742.4
17220+5638 ES 2657 AC 2003 4 89 39.1 8.60 11.50 A3V D 172202.03+563742.4
17220+5638 ES 2657 AC 2016 5 91 39.2 8.60 11.50 A3V 172202.03+563742.4

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