18081+0213 BU  636AD

 
 
18h 08m 07.24s +02 13' 07.2" P.A. 348 sep 40.8 mag 6.64,11.12 Sp A4V dist. 134.77 pc (439.62 l.y.)
 
 
Coord 2000
18081+0213
Discov num
BU  636
Comp
AD
Coord arcsec 2000
18 08 07.24 +02 13 07.2
Date first
1923
Date last
2002
Obs
5
Pa first
349
Pa last
348
P.A. Now (θ)
348°
Sep first
41.5
Sep last
40.8
Sep. Now (ρ)
40.8"
Mag pri
6.64
Mag sec
11.12
delta mag (ΔM)
4.48
Spectral class
A4V (white)
Pri motion ra
+012
Sec motion ra
+005
Pri motion dec
-007
Sec motion dec
-003
Notes
rPM=0.58
Nature of this double is uncertain.
 
 
18081+0213 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18081+0213 BU 636 AB 1878 1975 11 126 1.9 6.64 11.80 5.16
Show 18081+0213 BU 636 AC 1898 2002 5 92 12.5 6.64 13.60 6.96
Show 18081+0213 BU 636 AD 1923 2002 5 348 40.8 6.64 11.12 4.48 <===
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
347.6
Precise sep
40.75
Cdsa2 id
BU 636 AD
Constellation
Ophiuchus
HIP
88841
Tycho2
0435-04738-1
HD
165887
BD
BD+02 3498
Ra deg
18.135344444444446
De deg
2.2186666666666666
Distance
134.77
Distance ly
439.62
last precise pa
347.6
last precise sep
40.75
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18081+0213 BU 636 AD 2002 4 348 40.8 6.64 11.12 A4V D 180807.24+021307.2

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