15292+8027 STF1972AB (Pi1 UMi)

 
 
15h 29m 11.19s +80 26' 55.0" P.A. 81 sep 31.8 mag 6.64,7.30 Sp G0IV-V dist. 21.85 pc (71.27 l.y.)
 
 
Coord 2000
15292+8027
Discov num
STF1972
Comp
AB
Coord arcsec 2000
15 29 11.19 +80 26 55.0
Date first
1782
Date last
2016
Obs
96
Pa first
87
Pa last
81
P.A. Now (θ)
81°
Sep first
26.4
Sep last
31.8
Sep. Now (ρ)
31.8"
Mag pri
6.64
Mag sec
7.30
delta mag (ΔM)
0.66
Spectral class
G0IV-V (yellow)
Pri motion ra
-225
Sec motion ra
-217
Pri motion dec
+108
Sec motion dec
+106
Notes
N Z V (See Notes, Parallax indicates components are physical, Proper motion indicates physical)
rPM=0.033 (< 0.3, Physical double)
This double is physical.
 
 
15292+8027 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Pi1 UMi 2556 15292+8027 STF1972 AB 1782 2016 96 81 31.8 6.64 7.30 0.66 <===
Show 2556 15292+8027 STF1972 AC 1911 2014 6 101 187.0 6.64 11.40 4.76
Show 2558 15292+8027 LAF 54 BD 2005 2005 1 271 6.9 5.60 20.10 14.50
Show 2558 15292+8027 LAF 54 BE 2005 2005 1 272 7.4 5.60 20.30 14.70
Quintuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
80.5
Precise sep
31.848
Name
Pi1 UMi
Constellation
Ursa Minor
SAO
2556
HIP
75809
Tycho2
4566-01950-1
HD
139777
HR
5829
GC
20929
BD
BD+80 480
Bayer
Pi 1 Ursae Minoris
Bayer name
Pi1 UMi
Distance
21.85
Distance ly
71.27
last precise pa
80.5
last precise sep
31.848
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
15292+8027 STF1972 AB 2007 76 79 31.3 6.64 7.30 NZDV 152911.19+802655.0
15292+8027 STF1972 AB 2008 77 79 31.3 6.64 7.30 NZDV 152911.19+802655.0
15292+8027 STF1972 AB 2010 79 79 31.4 6.64 7.30 NZDV 152911.19+802655.0
15292+8027 STF1972 AB 2013 88 79 31.4 6.64 7.30 G0IV-V NZDV 152911.19+802655.0
15292+8027 STF1972 AB 2015 90 78 31.8 6.64 7.30 G0IV-V NZ V 152911.19+802655.0
15292+8027 STF1972 AB 2016 96 81 31.8 6.64 7.30 G0IV-V NZ V 152911.19+802655.0

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