18503-2100 ARA1554

 
 
18h 50m 17.87s -20 59' 44.8" P.A. 188 sep 9.8 mag 10.73,12.80
 
 
Coord 2000
18503-2100
Discov num
ARA1554
Comp
Coord arcsec 2000
18 50 17.87 -20 59 44.8
Date first
1921
Date last
1999
Obs
4
Pa first
184
Pa last
188
P.A. Now (θ)
188°
Sep first
10.4
Sep last
9.8
Sep. Now (ρ)
9.8"
Mag pri
10.73
Mag sec
12.80
delta mag (ΔM)
2.07
Spectral class
Pri motion ra
+009
Sec motion ra
+013
Pri motion dec
-007
Sec motion dec
+002
Notes
rPM=0.749
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
187.5
Precise sep
9.812
Constellation
Sagittarius
Tycho2
6293-01421-1
last precise pa
187.5
last precise sep
9.812
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18503-2100 ARA1554 1998 3 187 9.7 10.73 12.80 D 185017.87-205944.8
18503-2100 ARA1554 1999 4 188 9.8 10.73 12.80 D 185017.87-205944.8

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