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 |
|
