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
Cdsa2 id
ES 2421
Constellation
Lyra
Ra deg
18.901763888888887
De deg
31.041972222222224
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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