21099+4257 LDS2492

 
 
21h 09m 49.77s +42 57' 20.6" P.A. 136 sep 21.6 mag 15.37,15.64
 
 
Coord 2000
21099+4257
Discov num
LDS2492
Comp
Coord arcsec 2000
21 09 49.77 +42 57 20.6
Date first
1954
Date last
2017
Obs
6
Pa first
135
Pa last
136
P.A. Now (θ)
136°
Sep first
21.0
Sep last
21.6
Sep. Now (ρ)
21.6"
Mag pri
15.37
Mag sec
15.64
delta mag (ΔM)
0.27
Spectral class
Pri motion ra
+202
Sec motion ra
+202
Pri motion dec
-019
Sec motion dec
-019
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
135.5
Precise sep
21.6
Constellation
Cygnus
Gaia DR2
1970054533224389888
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21099+4257 LDS2492 2000 3 136 21.6 15.56 15.71 D 210949.77+425720.6
21099+4257 LDS2492 2002 4 135 21.5 15.56 15.71 D 210949.77+425720.6
21099+4257 LDS2492 2017 6 136 21.6 15.37 15.64 210949.77+425720.6

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