18541+3103 ES 2421

 
 
18h 54m 06.35s +31 02' 31.1" P.A. 68 sep 7.7 mag 10.54,11.20 Sp F2
 
 
Coord 2000
18541+3103
Discov num
ES 2421
Comp
Coord arcsec 2000
18 54 06.35 +31 02 31.1
Date first
1901
Date last
2010
Obs
6
Pa first
76
Pa last
68
P.A. Now (θ)
68°
Sep first
7.9
Sep last
7.7
Sep. Now (ρ)
7.7"
Mag pri
10.54
Mag sec
11.20
delta mag (ΔM)
0.66
Spectral class
F2 (yellow-white)
Pri motion ra
+007
Sec motion ra
+012
Pri motion dec
-003
Sec motion dec
+008
Notes
rPM=0.838
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
68
Precise sep
7.74
Constellation
Lyra
last precise pa
68
last precise sep
7.74
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18541+3103 ES 2421 1998 3 68 7.7 10.54 11.20 F2 D 185406.35+310231.1
18541+3103 ES 2421 2008 4 69 7.9 10.54 11.20 F2 D 185406.35+310231.1
18541+3103 ES 2421 2010 6 68 7.3 10.54 11.20 F2 185406.35+310231.1

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