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 18428+5938 STF2398 AB 1831 2015 619 181 11.1 9.11 9.96 0.85 Y
Show 18428+5938 STF2398 AC 1904 2000 19 158 214.9 9.11 12.24 3.13
Show 18428+5938 POP1224 AD 1988 2008 3 110 100.0 9.11 13.50 4.39
Show 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
 
 
Precise pa
157.1
Precise sep
202.72
Cdsa2 id
STF 2398 BC
Constellation
Draco
HIP
91768
HD
173739
GL
Gl 725A
BD
BD+59 1915
Ra deg
18.71302777777778
De deg
59.62683333333334
Distance
3.57
Distance ly
11.65
last precise pa
157.1
last precise sep
202.72
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18428+5938 STF2398 BC 2000 18 157 202.7 9.80 12.80 N D 184246.88+593737.4

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