20177+3921 SEI1070

 
 
20h 17m 42.20s +39 20' 58.4" P.A. 143 sep 27.9 mag 10.27,11.06 Sp B
 
 
Coord 2000
20177+3921
Discov num
SEI1070
Comp
Coord arcsec 2000
20 17 42.20 +39 20 58.4
Date first
1892
Date last
2015
Obs
15
Pa first
144
Pa last
143
P.A. Now (θ)
143°
Sep first
28.4
Sep last
27.9
Sep. Now (ρ)
27.9"
Mag pri
10.27
Mag sec
11.06
delta mag (ΔM)
0.79
Spectral class
B (blue-white)
Pri motion ra
-004
Sec motion ra
-004
Pri motion dec
-005
Sec motion dec
-005
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
142.6
Precise sep
27.885
Constellation
Cygnus
Tycho2
3151-00165-1
Gaia DR2
02909847296
HD
228789
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20177+3921 SEI1070 1998 8 142 28.0 10.27 11.06 D 201742.20+392058.4
20177+3921 SEI1070 2002 9 143 27.9 10.27 11.06 D 201742.20+392058.4
20177+3921 SEI1070 2010 10 144 28.2 10.27 11.06 B 201742.20+392058.4
20177+3921 SEI1070 2015 11 143 27.8 10.27 11.06 B 201742.20+392058.4

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