18551+1717 COU 721 AC

18h 55m 08.10s +17° 17' 18.1" P.A. 149.00 sep 17.5 mag 9.30,11.00 Sp G0

Coord 2000 18551+1717 Discov num COU 721 Comp AC Coord arcsec 2000 18 55 08.10 +17 17 18.1
Date first 1899 Date last 2015 Obs 9
Pa first 160 Pa last 149.1 P.A. Now (θ) 149.1°
Sep first 16.8 Sep last 17.471 Sep. Now (ρ) 17.471"
Mag pri 9.30 Mag sec 11.00 delta mag (ΔM) 1.7 Spectral class G0 (yellow)
Pri motion ra -017 Sec motion ra +007
Pri motion dec -008 Sec motion dec +002
Notes




rPM=1.384

This double is not physical.



18551+1717 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 230061 18 55 08 +17 17 18 COU 721 AB 2016 4 302 3.3 9.30 11.40 2.10
Show 18 55 08 +17 17 18 COU 721 AC 2015 9 149 17.5 9.30 11.00 1.70 <===


Triple system
3 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Constellation Hercules Tycho2 1588-01680-1 Gaia DR2 4517134138794579072 HD 230061
DM BD+17 3772