18428+5938 STF2398BC

 
 
18H 42M 46.90S +59 37' 36.6" P.A. 157 SEP 202.7 MAG 9.96,12.24 SP M4.5 DIST. 3.57 PC (11.65 L.Y.)
 
 
Coord 2000
18428+5938
Discov num
STF2398
Comp
BC
Coord arcsec 2000
18 42 46.90 +59 37 36.6
Date first
1904
Date last
2000
Obs
18
Pa first
261
Pa last
157
P.A. Now (θ)
157°
Sep first
54.2
Sep last
202.7
Sep. Now (ρ)
202.7"
Mag pri
9.96
Mag sec
12.24
delta mag (ΔM)
2.28
Spectral class
M4.5 (red)
Pri motion ra
-139
Sec motion ra
-001
Pri motion dec
+185
Sec motion dec
-001
Notes
N L P (See Notes, Linear solution, 100-year proper motion)
rPM=1.001
This double is not physical.
 
 
18428+5938 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 31128 18428+5938 STF2398 AB 1831 2015 619 181 11.2 9.11 9.96 0.85 Y
Show 31128 18428+5938 STF2398 AC 1904 2000 19 158 214.9 9.11 12.24 3.13
Show 31128 18428+5938 POP1224 AD 1988 2008 3 110 100.0 9.11 13.50 4.39
Show 31129 18428+5938 STF2398 BC 1904 2000 18 157 202.7 9.96 12.24 2.28 <===
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Draco
SAO
31129
HIP
91768
HD
173739
GL
Gl 725A
BD
BD+59 1915
Distance
3.57
Distance ly
11.65
last precise pa
157.1
last precise sep
202.72