18257-2102 HLD 144CD

 
 
18h 25m 34.19s -21 02' 06.1" P.A. 159 sep 7.8 mag 11.50,11.80
 
 
Coord 2000
18257-2102
Discov num
HLD 144
Comp
CD
Coord arcsec 2000
18 25 34.19 -21 02 06.1
Date first
1909
Date last
1999
Obs
4
Pa first
160
Pa last
159
P.A. Now (θ)
159°
Sep first
9.8
Sep last
7.8
Sep. Now (ρ)
7.8"
Mag pri
11.50
Mag sec
11.80
delta mag (ΔM)
0.3
Spectral class
Pri motion ra
+002
Sec motion ra
-019
Pri motion dec
+006
Sec motion dec
+010
Notes
rPM=0.996
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
159.1
Precise sep
7.776
Cdsa2 id
HLD 144 CD
Constellation
Sagittarius
Ra deg
18.42616388888889
De deg
-21.03502777777778
last precise pa
159.1
last precise sep
7.776
 
 
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 CD 1998 2 159 7.8 11.50 11.80 D 182534.19-210206.1
18257-2102 HLD 144 CD 1999 3 159 7.8 11.50 11.80 D 182534.19-210206.1

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