19384+0021 BU  249AB

 
 
19h 38m 21.68s +00 20' 43.6" P.A. 109 sep 0.8 mag 7.40,9.41 Sp A7IV
 
 
Coord 2000
19384+0021
Discov num
BU  249
Comp
AB
Coord arcsec 2000
19 38 21.68 +00 20 43.6
Date first
1875
Date last
2008
Obs
45
Pa first
142
Pa last
109
P.A. Now (θ)
109°
Sep first
1.3
Sep last
0.8
Sep. Now (ρ)
0.8"
Mag pri
7.40
Mag sec
9.41
delta mag (ΔM)
2.01
Spectral class
A7IV (white)
Pri motion ra
+025
Sec motion ra
+025
Pri motion dec
+011
Sec motion dec
+011
Notes
Nature of this double is uncertain.
 
 
19384+0021 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 19384+0021 BU 249 AB 1875 2008 45 109 0.8 7.40 9.41 2.01 <===
Show 19384+0021 BU 249 AC 1916 2000 3 120 17.5 7.40 14.20 6.80
Show 19384+0021 LV 22 AD 1916 2000 3 55 34.4 7.40 11.40 4.00
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
109.1
Precise sep
0.81
Constellation
Aquila
Tycho2
0479-01987-1
HD
185297
last precise pa
109.1
last precise sep
0.81
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19384+0021 BU 249 AB 1997 43 111 1.0 7.40 9.41 A7IV D 193821.68+002043.6
19384+0021 BU 249 AB 2006 44 110 0.8 7.40 9.41 A7IV D 193821.68+002043.6
19384+0021 BU 249 AB 2008 45 109 0.8 7.40 9.41 A7IV D 193821.68+002043.6

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