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 |
|