18091+3101 BLL 31 AB (T Her)

18h 09m 06.21s +31° 01' 16.1" P.A. 320.00 sep 64.5 mag 10.04,11.08 Sp M4e dist. 925.93 pc (3020.38 l.y.)

Coord 2000 18091+3101 Discov num BLL  31 Comp AB Coord arcsec 2000 18 09 06.21 +31 01 16.1
Date first 1877 Date last 2015 Obs 19
Pa first 321 Pa last 320.3 P.A. Now (θ) 320.3°
Sep first 66.9 Sep last 64.532 Sep. Now (ρ) 64.532"
Mag pri 10.04 Mag sec 11.08 delta mag (ΔM) 1.04 Spectral class M4e (red)
Pri motion ra -005 Sec motion ra +014
Pri motion dec +009 Sec motion dec -009
Notes N (See Notes)




rPM=1.573

This double is not physical.



18091+3101 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show T Her 66680 18 09 06 +31 01 16 BLL 31 AB 2015 19 320 64.5 10.04 11.08 1.04 <===
Show 18 09 03 +31 02 06 BKO 51 BC 2015 8 207 19.0 11.08 13.20 2.12


Triple system
3 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Var name T Her Constellation Hercules SAO 66680 HIP 88923
Tycho2 2622-01634-1 Gaia DR2 4591149275824008960 HD 166382 GC 24757
DM BD+31 3185 BD BD+30 3137 Distance 925.93 Distance ly 3020.38