20177+3331 HJ 1500AD

 
 
20h 17m 43.96s +33 31' 18.7" P.A. 318 sep 40.9 mag 9.45,12.40 Sp F5
 
 
Coord 2000
20177+3331
Discov num
HJ 1500
Comp
AD
Coord arcsec 2000
20 17 43.96 +33 31 18.7
Date first
1904
Date last
2015
Obs
12
Pa first
338
Pa last
318
P.A. Now (θ)
318°
Sep first
37.7
Sep last
40.9
Sep. Now (ρ)
40.9"
Mag pri
9.45
Mag sec
12.40
delta mag (ΔM)
2.95
Spectral class
F5 (yellow-white)
Pri motion ra
+015
Sec motion ra
+008
Pri motion dec
-031
Sec motion dec
+007
Notes
rPM=1.122
This double is not physical.
 
 
20177+3331 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20177+3331 HJ 1500 AB 1828 2015 17 53 17.7 9.45 10.60 1.15
Show 20177+3331 HJ 1500 AC 1904 2015 10 336 32.2 9.45 12.80 3.35
Show 20177+3331 HJ 1500 AD 1904 2015 12 318 40.9 9.45 12.40 2.95 <===
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
317.5
Precise sep
40.9
Constellation
Cygnus
SAO
69767
Tycho2
2676-00756-1
Gaia DR2
54020660864
HD
228771
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20177+3331 HJ 1500 AD 1999 5 318 40.9 9.45 12.40 D 201743.96+333118.7
20177+3331 HJ 1500 AD 2002 6 318 40.9 9.45 12.40 D 201743.96+333118.7
20177+3331 HJ 1500 AD 2013 7 318 41.3 9.45 12.40 F5 201743.96+333118.7
20177+3331 HJ 1500 AD 2015 8 318 40.9 9.45 12.40 F5 201743.96+333118.7

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