02318+8916 STF 93 AB (Polaris)

 
 
02h 31m 49.09s +89 15' 50.7" P.A. 236.00 sep 18.4 mag 2.04,9.10 Sp F7Ib+F3V dist. 132.63 pc (432.64 l.y.)
 
 
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 65
Pa first 203 Pa last 235.7 P.A. Now (θ) 235.7°
Sep first 17.3 Sep last 18.39 Sep. Now (ρ) 18.39"
Mag pri 2.04 Mag sec 9.10 delta mag (ΔM) 7.06 Spectral class F7Ib+F3V (yellow-white/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 wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 308 02 31 49 +89 15 51 WRH 39 Aa,Ab 2014 8 175 0.1 2.30 4.30 2.00 Y
Show Polaris 308 02 31 49 +89 15 51 STF 93 AB 2016 65 236 18.4 2.04 9.10 7.06 <===
Show 308 02 31 49 +89 15 51 STF 93 AC 2016 7 103 39.0 2.04 13.80 11.76
Show 308 02 31 49 +89 15 51 STF 93 AD 2016 8 194 83.2 2.04 14.30 12.26
Show 02 30 43 +89 15 39 STF 93 BC 2015 4 83 53.1 9.10 13.80 4.70
Show 02 30 43 +89 15 39 STF 93 BD 2014 3 179 69.4 9.10 14.30 5.20
Quintuple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Polaris Constellation Ursa Minor SAO 308 HIP 11767
Tycho2 4628-00237-1 Gaia DR2 576402619921505664 HD 8890 HR 424
GC 2243 ADS 1477 BD BD+88 8 Bayer Alpha Ursae Minoris
Bayer name Alp UMi Flamsteed 1 Ursae Minoris Flamsteed name 1 UMi FK5 907
Distance 132.63 Distance ly 432.64 Bayer greek α UMi
Other names Lodestar, Cynosura, Alruccabah, Phoenice, Polare, Stella Polare, Tramontana, Angel Stern, Navigatoria, Star of Arcady, Yilduz, Mismar, Polyarnaya