18405+3139 HO  437AC

 
 
18H 40M 29.71S +31 38' 36.4" P.A. 272 SEP 39.9 MAG 9.00,11.30 SP A5 DIST. 168.07 PC (548.24 L.Y.)
 
 
Coord 2000
18405+3139
Discov num
HO  437
Comp
AC
Coord arcsec 2000
18 40 29.71 +31 38 36.4
Date first
1893
Date last
2014
Obs
8
Pa first
273
Pa last
272
P.A. Now (θ)
272°
Sep first
40.4
Sep last
39.9
Sep. Now (ρ)
39.9"
Mag pri
9.00
Mag sec
11.30
delta mag (ΔM)
2.3
Spectral class
A5 (white)
Pri motion ra
-011
Sec motion ra
+007
Pri motion dec
+001
Sec motion dec
-010
Notes
Nature of this double is uncertain.
 
 
18405+3139 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 67238 18405+3139 HO 437 AB 1892 2007 39 134 0.3 9.00 7.71 1.29
Show 67238 18405+3139 HO 437 AC 1893 2014 8 272 39.9 9.00 11.30 2.30 <===
Show 67238 18405+3139 HO 437 AE 1905 2006 5 288 22.1 9.00 15.20 6.20
Show 67238 18405+3139 HO 437 CD 1893 2006 15 344 4.3 11.30 11.70 0.40
Quintuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Lyra
SAO
67238
HIP
91579
Tycho2
2637-01136-1
HD
172729
BD
BD+31 3327
Distance
168.07
Distance ly
548.24
last precise pa
272
last precise sep
39.9