18257-2102 HLD 144AC

 
 
18h 25m 39.08s -21 02' 17.5" P.A. 280 sep 69 mag 9.20,12.60 Sp A3/5II
 
 
Coord 2000
18257-2102
Discov num
HLD 144
Comp
AC
Coord arcsec 2000
18 25 39.08 -21 02 17.5
Date first
1909
Date last
1999
Obs
3
Pa first
280
Pa last
280
P.A. Now (θ)
280°
Sep first
67.6
Sep last
69.0
Sep. Now (ρ)
69"
Mag pri
9.20
Mag sec
12.60
delta mag (ΔM)
3.4
Spectral class
A3/5II (white)
Pri motion ra
+013
Sec motion ra
+002
Pri motion dec
-036
Sec motion dec
+006
Notes
rPM=1.134
This double is not physical.
 
 
18257-2102 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18257-2102 HLD 144 AB 1888 1991 14 42 2.8 9.20 9.13 0.07
Show 18257-2102 HLD 144 AC 1909 1999 3 280 69.0 9.20 12.60 3.40 <===
Show 18257-2102 HLD 144 CD 1909 1999 4 159 7.8 11.50 11.80 0.30
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
280
Precise sep
69
Constellation
Sagittarius
Tycho2
6278-01761-1
last precise pa
280
last precise sep
69
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18257-2102 HLD 144 AC 1998 2 280 69.1 9.20 11.50 A3/5II D 182539.08-210217.5
18257-2102 HLD 144 AC 1999 3 279 69.7 9.20 11.50 A3/5II D 182539.08-210217.5

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