18179-1750 TDT 781Aa,Ab

 
 
18h 17m 54.51s -17 49' 45.2" P.A. 130 sep 0.4 mag 9.48,10.12 Sp M1
 
 
Coord 2000
18179-1750
Discov num
TDT 781
Comp
Aa,Ab
Coord arcsec 2000
18 17 54.51 -17 49 45.2
Date first
1991
Date last
1991
Obs
1
Pa first
130
Pa last
130
P.A. Now (θ)
130°
Sep first
0.4
Sep last
0.4
Sep. Now (ρ)
0.4"
Mag pri
9.48
Mag sec
10.12
delta mag (ΔM)
0.64
Spectral class
M1 (red)
Pri motion ra
-000
Sec motion ra
-001
Pri motion dec
+001
Sec motion dec
+001
Notes
rPM=0.707
Nature of this double is uncertain.
 
 
18179-1750 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 161282 18179-1750 TDT 781 Aa,Ab 1991 1991 1 130 0.4 9.48 10.12 0.64 <===
Show 161282 18179-1750 ARA 275 AB 1916 1999 2 349 10.4 9.08 12.50 3.42
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
130.4
Precise sep
0.43
Constellation
Sagittarius
SAO
161282
Tycho2
6269-00352-1
HD
167861
last precise pa
130.4
last precise sep
0.43
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18179-1750 TDT 781 Aa,Ab 1991 1 130 0.4 9.48 10.12 181754.51-174945.2

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