09521+5404 STT 208 (Phi UMa)

 
 
09h 52m 06.36s +54 03' 51.4" P.A. 311.9 sep 0.42 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)
311.9°
Sep first
0.4
Sep last
0.4
Sep. Now (ρ)
0.42"
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
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)104.6y Periastron (T)1987.52y Semi-major axis (a)0.329a
Eccentricity (e)0.436 Inclination (i)19.4° Longitude of periastron (ω)33.3°
Node (Ω)132.5° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2017
label rho theta
2000 0.260 259.1
2001 0.270 263.6
2002 0.281 267.8
2003 0.291 271.7
2004 0.301 275.3
2005 0.311 278.7
2006 0.320 281.8
2007 0.330 284.8
2008 0.339 287.7
2009 0.347 290.4
2010 0.356 292.9
2011 0.364 295.4
2012 0.372 297.7
2013 0.379 299.9
2014 0.386 302.1
2015 0.393 304.2
2016 0.400 306.2
2017 0.406 308.1
2018 0.412 310.0
2019 0.417 311.9
2020 0.423 313.7
2021 0.427 315.4
2022 0.432 317.1
2023 0.436 318.8
2024 0.440 320.4
2025 0.444 322.1
2026 0.447 323.7
2027 0.450 325.2
2028 0.453 326.8
2029 0.456 328.3
2030 0.458 329.8

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

grafico orbita





wds09521%2B5404b.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.