21111+1704 HEI 187

 
 
21h 11m 05.26s +17 03' 40.7" P.A. 255 sep 1.2 mag 10.72,11.40 Sp G5
 
 
Coord 2000
21111+1704
Discov num
HEI 187
Comp
Coord arcsec 2000
21 11 05.26 +17 03 40.7
Date first
1980
Date last
2014
Obs
10
Pa first
256
Pa last
255
P.A. Now (θ)
255°
Sep first
1.1
Sep last
1.2
Sep. Now (ρ)
1.2"
Mag pri
10.72
Mag sec
11.40
delta mag (ΔM)
0.68
Spectral class
G5 (yellow)
Pri motion ra
+187
Sec motion ra
+187
Pri motion dec
-039
Sec motion dec
-039
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
255
Precise sep
1.166
Cdsa2 id
HEI 187
Constellation
Pegasus
Tycho2
1653-00153-1
Ra deg
21.184794444444446
De deg
17.061305555555556
last precise pa
255
last precise sep
1.166
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21111+1704 HEI 187 1999 5 257 1.1 10.72 11.40 G5 D 211105.26+170340.7
21111+1704 HEI 187 2008 8 256 1.1 10.72 11.40 G5 D 211105.26+170340.7
21111+1704 HEI 187 2009 9 256 1.1 10.72 11.40 G5 D 211105.26+170340.7
21111+1704 HEI 187 2014 10 255 1.2 10.72 11.40 G5 211105.26+170340.7

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