18540+3723 BU  137AB

 
 
18h 53m 57.56s +37 22' 49.7" P.A. 169 sep 1.5 mag 8.69,9.02 Sp G5III-IV
 
 
Coord 2000
18540+3723
Discov num
BU  137
Comp
AB
Coord arcsec 2000
18 53 57.56 +37 22 49.7
Date first
1873
Date last
2015
Obs
129
Pa first
140
Pa last
169
P.A. Now (θ)
169°
Sep first
1.5
Sep last
1.5
Sep. Now (ρ)
1.5"
Mag pri
8.69
Mag sec
9.02
delta mag (ΔM)
0.33
Spectral class
G5III-IV (yellow)
Pri motion ra
-016
Sec motion ra
-016
Pri motion dec
+045
Sec motion dec
+045
Notes
Nature of this double is uncertain.
 
 
18540+3723 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18540+3723 BU 137 AB 1873 2015 129 169 1.5 8.69 9.02 0.33 <===
Show 18540+3723 BU 137 AC 1880 2012 19 147 24.4 8.69 12.00 3.31
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
168.6
Precise sep
1.52
Constellation
Lyra
Tycho2
2650-01881-1
HD
175491
last precise pa
168.6
last precise sep
1.52
 
 
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 AB 2005 129 162 1.5 8.69 9.02 G5III-IV 185357.56+372249.7
18540+3723 BU 137 AB 2009 133 163 1.6 8.69 9.02 G5III-IV 185357.56+372249.7
18540+3723 BU 137 AB 2011 136 163 1.5 8.69 9.02 G5III-IV 185357.56+372249.7
18540+3723 BU 137 AB 2013 127 164 1.5 8.69 9.02 G5III-IV 185357.56+372249.7
18540+3723 BU 137 AB 2015 128 163 1.6 8.69 9.02 G5III-IV 185357.56+372249.7

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