17178+2844 S   686

 
 
17h 17m 48.11s +28 44' 00.4" P.A. 4 sep 51 mag 8.17,9.30 Sp A2 dist. 258.4 pc (842.9 l.y.)
 
 
Coord 2000
17178+2844
Discov num
S   686
Comp
Coord arcsec 2000
17 17 48.11 +28 44 00.4
Date first
1825
Date last
2014
Obs
22
Pa first
4
Pa last
4
P.A. Now (θ)
Sep first
55.0
Sep last
51.0
Sep. Now (ρ)
51"
Mag pri
8.17
Mag sec
9.30
delta mag (ΔM)
1.13
Spectral class
A2 (white)
Pri motion ra
-002
Sec motion ra
+001
Pri motion dec
-005
Sec motion dec
-031
Notes
N (See Notes)
rPM=0.844
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
3.9
Precise sep
51
Constellation
Hercules
SAO
84986
HIP
84614
Tycho2
2073-00483-1
HD
156680
BD
BD+28 2713
Distance
258.4
Distance ly
842.9
last precise pa
3.9
last precise sep
51
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17178+2844 S 686 2003 16 4 50.4 8.17 9.30 A2 N D 171748.11+284400.4
17178+2844 S 686 2012 18 4 50.0 8.17 9.30 A2 N D 171748.11+284400.4
17178+2844 S 686 2013 19 4 50.1 8.17 9.30 A2 N 171748.11+284400.4
17178+2844 S 686 2014 20 4 51.0 8.17 9.30 A2 N 171748.11+284400.4

If you need more information about this double, apply for a data request form to the WDS.