20151+3929 MLB 982AB

 
 
20h 15m 07.01s +39 30' 26.8" P.A. 183 sep 30.8 mag 9.83,12.68 Sp B
 
 
Coord 2000
20151+3929
Discov num
MLB 982
Comp
AB
Coord arcsec 2000
20 15 07.01 +39 30 26.8
Date first
1935
Date last
2015
Obs
10
Pa first
185
Pa last
183
P.A. Now (θ)
183°
Sep first
20.0
Sep last
30.8
Sep. Now (ρ)
30.8"
Mag pri
9.83
Mag sec
12.68
delta mag (ΔM)
2.85
Spectral class
B (blue-white)
Pri motion ra
-004
Sec motion ra
+001
Pri motion dec
-006
Sec motion dec
-015
Notes
rPM=0.685
Nature of this double is uncertain.
 
 
20151+3929 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20151+3929 MLB 982 AB 1935 2015 10 183 30.8 9.83 12.68 2.85 <===
Show 20151+3929 MLB 982 BC 1935 2015 9 355 6.0 12.68 13.90 1.22
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
182.9
Precise sep
30.769
Constellation
Cygnus
Tycho2
3155-00920-1
Gaia DR2
77331679872
HD
228568
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20151+3929 MLB 982 AB 1991 4 186 29.1 9.83 12.68 B 201507.01+393026.8
20151+3929 MLB 982 AB 1998 5 183 30.8 9.83 12.68 B 201507.01+393026.8
20151+3929 MLB 982 AB 2002 6 183 30.7 9.83 12.68 B 201507.01+393026.8
20151+3929 MLB 982 AB 2015 7 183 30.8 9.83 12.68 B 201507.01+393026.8

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