20136+4644 HJ 1495AB (31 Cyg)

 
 
20h 13m 37.90s +46 44' 28.8" P.A. 328 sep 36.5 mag 3.93,13.40 Sp K2II dist. 271 pc (884 l.y.)
 
 
Coord 2000
20136+4644
Discov num
HJ 1495
Comp
AB
Coord arcsec 2000
20 13 37.90 +46 44 28.8
Date first
1828
Date last
2015
Obs
12
Pa first
333
Pa last
328
P.A. Now (θ)
328°
Sep first
29.0
Sep last
36.5
Sep. Now (ρ)
36.5"
Mag pri
3.93
Mag sec
13.40
delta mag (ΔM)
9.47
Spectral class
K2II (yellow-orange)
Pri motion ra
+005
Sec motion ra
-010
Pri motion dec
+001
Sec motion dec
-006
Notes
N (See Notes)
rPM=1.419
This double is not physical.
 
 
20136+4644 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 49337 20136+4644 WRH 33 Aa,Ab 1949 1985 6 153 0.0 3.93 Y
Show 31 Cyg 49332 20136+4644 HJ 1495 AB 1828 2015 12 328 36.5 3.93 13.40 9.47 <===
Show 20136+4644 STFA 50 AC 1779 2016 46 173 108.6 3.93 6.97 3.04
Show 20136+4644 STFA 50 AD 1800 2016 38 322 336.7 3.93 4.83 0.90
Show 20136+4644 BU 1483 AF 1878 2015 4 168 43.5 3.93 13.90 9.97
Show 20136+4644 BU 1483 CG 1878 2003 3 95 37.9 6.97 14.20 7.23
Show 20136+4644 BU 1483 CH 1878 2014 4 62 60.6 6.97 12.60 5.63
Show 20136+4644 BU 1483 CI 1878 2015 7 136 60.2 6.97 12.26 5.29
Show 49332 20136+4644 GUI 30 DC 1800 2003 27 150 431.8 4.83 6.97 2.14
Show 20136+4644 ES 26 DE 1900 2003 4 252 36.3 4.83 13.20 8.37
Show 20136+4644 SMR 68 FJ 2003 2015 3 217 4.2 13.90 15.10 1.20
Show 20136+4644 SMR 68 HK 2000 2015 4 262 8.9 11.74 10.87 0.87
12-fold system
11 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
327.6
Precise sep
36.46
Name
31 Cyg
Constellation
Cygnus
SAO
49337
HIP
99675
Tycho2
3559-02797-1
Gaia DR2
52678091904
HD
192577
HR
7735
GC
28099
BD
BD+46 2882
Flamsteed
31 Cygni
Flamsteed name
31 Cyg
Distance
271
Distance ly
884
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20136+4644 HJ 1495 AB 2007 6 327 36.0 3.93 13.40 K2II D 201337.90+464428.8
20136+4644 HJ 1495 AB 2012 9 330 36.3 3.93 13.40 K2II N D 201337.90+464428.8
20136+4644 HJ 1495 AB 2014 10 328 36.1 3.93 13.40 K2II N D 201337.90+464428.8
20136+4644 HJ 1495 AB 2015 11 328 36.5 3.93 13.40 K2II N 201337.90+464428.8

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