18437-2240 DON 919AB

 
 
18h 43m 42.74s -22 40' 13.0" P.A. 72 sep 3.3 mag 8.10,12.70 Sp F7V dist. 74.85 pc (244.16 l.y.)
 
 
Coord 2000
18437-2240
Discov num
DON 919
Comp
AB
Coord arcsec 2000
18 43 42.74 -22 40 13.0
Date first
1928
Date last
1944
Obs
3
Pa first
71
Pa last
72
P.A. Now (θ)
72°
Sep first
3.5
Sep last
3.3
Sep. Now (ρ)
3.3"
Mag pri
8.10
Mag sec
12.70
delta mag (ΔM)
4.6
Spectral class
F7V (yellow-white)
Pri motion ra
-034
Sec motion ra
Pri motion dec
-071
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
18437-2240 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 187196 18437-2240 DON 919 AB 1928 1944 3 72 3.3 8.10 12.70 4.60 <===
Show 187196 18437-2240 DON 919 AC 1920 1999 5 301 14.7 8.10 12.60 4.50
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
71.7
Precise sep
3.27
Constellation
Sagittarius
SAO
187196
HIP
91864
Tycho2
6859-00235-1
HD
172934
BD
BD-22 4837
CD
CD-2213240
Distance
74.85
Distance ly
244.16
last precise pa
71.7
last precise sep
3.27
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18437-2240 DON 919 AB 1944 3 72 3.3 7.80 12.70 F7V 184342.74-224013.0

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