02318+8916 STF  93AB (Polaris)

 
 
02h 31m 49.09s +89 15' 50.7" P.A. 236 sep 18.4 mag 2.04,9.10 Sp F7:Ib-IIv
 
 
Coord 2000
02318+8916
Discov num
STF  93
Comp
AB
Coord arcsec 2000
02 31 49.09 +89 15 50.7
Date first
1779
Date last
2016
Obs
64
Pa first
203
Pa last
236
P.A. Now (θ)
236°
Sep first
17.3
Sep last
18.4
Sep. Now (ρ)
18.4"
Mag pri
2.04
Mag sec
9.10
delta mag (ΔM)
7.06
Spectral class
F7:Ib-IIv (yellow-white)
Pri motion ra
+038
Sec motion ra
Pri motion dec
-015
Sec motion dec
Notes
N V (See Notes, Proper motion indicates physical)
This double is physical.
 
 
02318+8916 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 308 02318+8916 WRH 39 Aa,Ab 1937 2006 5 26 0.1 2.30 4.30 2.00 Y
Show Polaris 308 02318+8916 STF 93 AB 1779 2016 64 236 18.4 2.04 9.10 7.06 <===
Show 308 02318+8916 STF 93 AC 1884 2016 7 103 39.0 2.04 13.80 11.76
Show 308 02318+8916 STF 93 AD 1884 2016 8 194 83.2 2.04 14.30 12.26
Show 02318+8916 STF 93 BC 2005 2005 2 85 53.2 9.10 13.80 4.70
Show 02318+8916 STF 93 BD 2005 2005 2 182 70.3 9.10 14.30 5.20
Quintuple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
235.7
Precise sep
18.39
Common name
Polaris
Other names
Lodestar, Cynosura, Alruccabah, Phoenice, Polare, Stella Polare, Tramontana, Angel Stern, Navigatoria, Star of Arcady, Yilduz, Mismar, Polyarnaya
Constellation
Ursa Minor
SAO
308
HD
8890
HR
424
Bayer
Alpha Ursae Minoris
Bayer name
Alp Umi
Flamsteed
1 Ursae Minoris
Flamsteed name
1 Umi
last precise pa
235.7
last precise sep
18.39
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
02318+8916 STF 93 AB 2006 59 231 18.2 2.10 9.10 F7:Ib-IIv N D 023147.08+891550.9
02318+8916 STF 93 AB 2009 60 232 18.2 2.10 9.10 F7:Ib-IIv N D 023147.08+891550.9
02318+8916 STF 93 AB 2013 63 233 18.1 2.04 9.10 F7:Ib-IIv N D 023147.08+891550.9
02318+8916 STF 93 AB 2016 64 236 18.4 2.04 9.10 F7:Ib-IIv NV 023149.09+891550.7

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