20120+3454 SEI 987

 
 
20h 12m 01.45s +34 54' 05.1" P.A. 336 sep 23.2 mag 11.40,12.26 Sp A2
 
 
Coord 2000
20120+3454
Discov num
SEI 987
Comp
Coord arcsec 2000
20 12 01.45 +34 54 05.1
Date first
1896
Date last
2015
Obs
12
Pa first
336
Pa last
336
P.A. Now (θ)
336°
Sep first
23.7
Sep last
23.2
Sep. Now (ρ)
23.2"
Mag pri
11.40
Mag sec
12.26
delta mag (ΔM)
0.86
Spectral class
A2 (white)
Pri motion ra
+000
Sec motion ra
+001
Pri motion dec
-002
Sec motion dec
-002
Notes
rPM=0.447
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
336.1
Precise sep
23.235
Constellation
Cygnus
SAO
69595
Tycho2
2679-02013-1
Gaia DR2
12613118208
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20120+3454 SEI 987 1998 4 336 23.3 11.40 12.40 D 201201.45+345405.1
20120+3454 SEI 987 2002 5 336 23.3 11.40 12.40 D 201201.45+345405.1
20120+3454 SEI 987 2011 6 336 23.2 11.40 12.40 D 201201.45+345405.1
20120+3454 SEI 987 2015 8 336 23.2 11.40 12.26 A2 201201.45+345405.1

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