18405+3139 HO  437AB

 
 
18h 40m 29.71s +31 38' 36.4" P.A. 134 sep 0.3 mag 9.00,7.71 Sp A5 dist. 168.07 pc (548.24 l.y.)
 
 
Coord 2000
18405+3139
Discov num
HO  437
Comp
AB
Coord arcsec 2000
18 40 29.71 +31 38 36.4
Date first
1892
Date last
2007
Obs
39
Pa first
116
Pa last
134
P.A. Now (θ)
134°
Sep first
0.4
Sep last
0.3
Sep. Now (ρ)
0.3"
Mag pri
9.00
Mag sec
7.71
delta mag (ΔM)
1.29
Spectral class
A5 (white)
Pri motion ra
-006
Sec motion ra
-006
Pri motion dec
+002
Sec motion dec
+002
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
 
 
Precise pa
133.5
Precise sep
0.344
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
133.5
last precise sep
0.344
 
 
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 AB 1996 37 131 0.4 9.00 7.71 A5 D 184029.71+313836.4
18405+3139 HO 437 AB 2007 39 134 0.3 9.00 7.71 A5 D 184029.71+313836.4

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