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
rPM=1.728
This double is not physical.
 
 
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
 
 
Precise pa
272
Precise sep
39.9
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
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18405+3139 HO 437 AC 2006 6 270 39.6 9.00 11.90 A5 D 184029.71+313836.4
18405+3139 HO 437 AC 2014 8 272 39.9 9.00 11.30 A5 184029.71+313836.4

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