18540+3723 BU  137AC

 
 
18h 53m 57.56s +37 22' 49.7" P.A. 146 sep 23.6 mag 8.69,12.00 Sp G5III-IV
 
 
Coord 2000
18540+3723
Discov num
BU  137
Comp
AC
Coord arcsec 2000
18 53 57.56 +37 22 49.7
Date first
1880
Date last
2015
Obs
20
Pa first
142
Pa last
146
P.A. Now (θ)
146°
Sep first
17.9
Sep last
23.6
Sep. Now (ρ)
23.6"
Mag pri
8.69
Mag sec
12.00
delta mag (ΔM)
3.31
Spectral class
G5III-IV (yellow)
Pri motion ra
-021
Sec motion ra
-007
Pri motion dec
+047
Sec motion dec
-011
Notes
rPM=1.159
This double is not physical.
 
 
18540+3723 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 67544 18540+3723 BU 137 AB 1873 2015 129 169 1.5 8.69 9.02 0.33
Show 67544 18540+3723 BU 137 AC 1880 2015 20 146 23.6 8.69 12.00 3.31 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
145.8
Precise sep
23.617
Constellation
Lyra
SAO
67544
Tycho2
2650-01881-1
Gaia DR2
2094001134684220800
HD
175491
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18540+3723 BU 137 AC 2008 16 146 24.0 8.69 12.00 G5III-IV D 185357.56+372249.7
18540+3723 BU 137 AC 2012 18 146 24.2 8.69 12.00 G5III-IV D 185357.56+372249.7
18540+3723 BU 137 AC 2015 20 146 23.6 8.69 12.00 G5III-IV 185357.56+372249.7

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