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
 
 
Precise pa
301.9
Precise sep
0.396
Name
Phi UMa
Cdsa2 id
STT 208
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
Ra deg
9.868433333333334
De deg
54.064277777777775
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





wds09521%2B5404a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
09521+5404 STT 208 2006 308 282 0.3 5.28 5.39 A2V NOD 095206.36+540351.4
09521+5404 STT 208 2007 311 286 0.3 5.28 5.39 A2V NOD 095206.36+540351.4
09521+5404 STT 208 2008 313 288 0.3 5.28 5.39 A2V NOD 095206.36+540351.4
09521+5404 STT 208 2009 314 291 0.3 5.28 5.39 A2V NOD 095206.36+540351.4
09521+5404 STT 208 2010 315 293 0.4 5.28 5.39 A2V NOD 095206.36+540351.4
09521+5404 STT 208 2011 316 296 0.4 5.28 5.39 A2V NOD 095206.36+540351.4
09521+5404 STT 208 2012 314 298 0.4 5.28 5.39 A2V NOD 095206.36+540351.4
09521+5404 STT 208 2013 315 300 0.4 5.28 5.39 A2V NOD 095206.36+540351.4
09521+5404 STT 208 2014 316 302 0.4 5.28 5.39 A2V NO 095206.36+540351.4

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