09521+5404 STT 208 (Phi UMa)

 
 
09H 52M 06.36S +54 03' 51.4" P.A. 310.1 SEP 0.44 MAG 5.28,5.39 SP A2V DIST. 156.01 PC (508.9 L.Y.)
 
 
Coord 2000
09521+5404
Discov num
STT 208
Comp
Coord arcsec 2000
09 52 06.36 +54 03 51.4
Date first
1842
Date last
2014
Obs
316
Pa first
4
Pa last
302
P.A. Now (θ)
310.1°
Sep first
0.4
Sep last
0.4
Sep. Now (ρ)
0.44"
Mag pri
5.28
Mag sec
5.39
delta mag (ΔM)
0.11
Spectral class
A2V (white)
Pri motion ra
-005
Sec motion ra
Pri motion dec
+021
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
Phi UMa
Constellation
Ursa Major
SAO
27408
HIP
48402
Tycho2
3814-01752-1
HD
85235
HR
3894
GC
13559
ADS
7545
BD
BD+54 1331
Bayer
Phi Ursae Majoris
Bayer name
Phi UMa
Flamsteed
30 Ursae Majoris
Flamsteed name
30 UMa
Distance
156.01
Distance ly
508.9
last precise pa
301.9
last precise sep
0.396
 
 
ORBITAL ELEMENTS
 
 
Period (P)105.4y Periastron (T)1987.4y Semi-major axis (a)0.349a
Eccentricity (e)0.45 Inclination (i)24.5° Longitude of periastron (ω)35°
Node (Ω)130.3° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.272 261.8
2001 0.283 266.2
2002 0.295 270.2
2003 0.307 273.9
2004 0.318 277.4
2005 0.329 280.6
2006 0.340 283.7
2007 0.351 286.5
2008 0.361 289.2
2009 0.370 291.7
2010 0.380 294.1
2011 0.389 296.4
2012 0.397 298.6
2013 0.405 300.7
2014 0.413 302.7
2015 0.420 304.6
2016 0.427 306.5
2017 0.434 308.4
2018 0.440 310.1
2019 0.446 311.8
2020 0.452 313.5
2021 0.457 315.2
2022 0.461 316.8
2023 0.466 318.3
2024 0.470 319.9
2025 0.474 321.4
2026 0.477 322.9
2027 0.480 324.4
2028 0.483 325.8
2029 0.485 327.3
2030 0.487 328.7

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic