18178+4351 A   578AB

 
 
18h 17m 49.51s +43 50' 32.0" P.A. 167 sep 1.8 mag 9.13,12.24 Sp F8 dist. 129.03 pc (420.9 l.y.)
 
 
Coord 2000
18178+4351
Discov num
A   578
Comp
AB
Coord arcsec 2000
18 17 49.51 +43 50 32.0
Date first
1903
Date last
2010
Obs
16
Pa first
176
Pa last
167
P.A. Now (θ)
167°
Sep first
1.7
Sep last
1.8
Sep. Now (ρ)
1.8"
Mag pri
9.13
Mag sec
12.24
delta mag (ΔM)
3.11
Spectral class
F8 (yellow-white)
Pri motion ra
-019
Sec motion ra
-020
Pri motion dec
-010
Sec motion dec
-010
Notes
V (Proper motion indicates physical)
rPM=0.045 (< 0.3, Physical double)
This double is physical.
 
 
18178+4351 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 47365 18178+4351 A 578 Aa,Ab 1903 2010 30 222 0.2 9.55 10.64 1.09 Y
Show 47365 18178+4351 A 578 AB 1903 2010 16 167 1.8 9.13 12.24 3.11 <===
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
166.9
Precise sep
1.79
Constellation
Lyra
SAO
47365
HIP
89655
Tycho2
3115-00363-1
BD
BD+43 2938
Distance
129.03
Distance ly
420.9
last precise pa
166.9
last precise sep
1.79
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18178+4351 A 578 AB 1991 12 164 1.8 9.13 12.24 F8 N 181749.51+435032.0
18178+4351 A 578 AB 2009 13 157 1.8 9.13 12.24 F8 N 181749.51+435032.0
18178+4351 A 578 AB 2010 16 167 1.8 9.13 12.24 F8 V 181749.51+435032.0

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