20391+1329 UC 4242AB

 
 
20h 39m 07.13s +13 29' 01.8" P.A. 105 sep 45.4 mag 9.90,15.40
 
 
Coord 2000
20391+1329
Discov num
UC 4242
Comp
AB
Coord arcsec 2000
20 39 07.13 +13 29 01.8
Date first
1998
Date last
2015
Obs
3
Pa first
105
Pa last
105
P.A. Now (θ)
105°
Sep first
45.1
Sep last
45.4
Sep. Now (ρ)
45.4"
Mag pri
9.90
Mag sec
15.40
delta mag (ΔM)
5.5
Spectral class
Pri motion ra
+074
Sec motion ra
+071
Pri motion dec
+056
Sec motion dec
+055
Notes
V (Proper motion indicates physical)
rPM=0.034 (< 0.3, Physical double)
This double is physical.
 
 
20391+1329 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20391+1329 TDT2453 Aa,Ab 1991 1991 1 117 0.5 10.49 10.94 0.45
Show 20391+1329 UC 4242 AB 1998 2015 3 105 45.4 9.90 15.40 5.50 <===
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
105.4
Precise sep
45.391
Cdsa2 id
UC 4242 AB
Constellation
Delphinus
Ra deg
20.651980555555554
De deg
13.483833333333333
last precise pa
105.4
last precise sep
45.391
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20391+1329 UC 4242 AB 2000 2 105 45.3 9.90 15.40 V 203907.13+132901.8
20391+1329 UC 4242 AB 2001 2 105 45.1 9.90 15.40 V 203907.13+132901.8
20391+1329 UC 4242 AB 2015 3 105 45.4 9.90 15.40 V 203907.13+132901.8

If you need more information about this double, apply for a data request form to the WDS.