18121+0207 BAL1957

 
 
18h 12m 07.75s +02 07' 53.1" P.A. 230 sep 8.6 mag 9.89,9.97
 
 
Coord 2000
18121+0207
Discov num
BAL1957
Comp
Coord arcsec 2000
18 12 07.75 +02 07 53.1
Date first
1909
Date last
2013
Obs
8
Pa first
231
Pa last
230
P.A. Now (θ)
230°
Sep first
8.7
Sep last
8.6
Sep. Now (ρ)
8.6"
Mag pri
9.89
Mag sec
9.97
delta mag (ΔM)
0.08
Spectral class
Pri motion ra
+032
Sec motion ra
+017
Pri motion dec
-007
Sec motion dec
-012
Notes
N (See Notes)
rPM=0.483
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
230.1
Precise sep
8.63
Constellation
Ophiuchus
last precise pa
230.1
last precise sep
8.63
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18121+0207 BAL1957 1999 3 51 8.7 10.20 10.20 N D 181207.31+020747.8
18121+0207 BAL1957 2004 5 231 8.4 9.89 9.97 N D 181207.75+020753.1
18121+0207 BAL1957 2009 6 231 8.4 9.89 9.97 N D 181207.75+020753.1
18121+0207 BAL1957 2013 8 230 8.6 9.89 9.97 N 181207.75+020753.1

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