09104+6708 STF1306AB (Sig2 UMa)

 
 
09h 10m 23.53s +67 08' 03.3" P.A. 346.9 sep 4.43 mag 4.87,8.85 Sp F7V dist. 20.38 pc (66.48 l.y.)
 
 
Coord 2000
09104+6708
Discov num
STF1306
Comp
AB
Coord arcsec 2000
09 10 23.53 +67 08 03.3
Date first
1782
Date last
2016
Obs
227
Pa first
283
Pa last
348
P.A. Now (θ)
346.9°
Sep first
8.0
Sep last
4.3
Sep. Now (ρ)
4.43"
Mag pri
4.87
Mag sec
8.85
delta mag (ΔM)
3.98
Spectral class
F7V (yellow-white)
Pri motion ra
+007
Sec motion ra
+004
Pri motion dec
-095
Sec motion dec
-030
Notes
N O (See Notes, Orbital solution)
rPM=0.683
This double is physical.
 
 
09104+6708 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Sig2 UMa 14788 09104+6708 STF1306 AB 1782 2016 227 347 4.4 4.87 8.85 3.98 Y <===
Show 14788 09104+6708 STF1306 AC 1879 2003 10 148 197.8 4.87 10.32 5.45
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
348
Precise sep
4.27
Name
Sig2 UMa
Constellation
Ursa Major
SAO
14788
HIP
45038
Tycho2
4141-01496-1
HD
78154
HR
3616
GC
12619
ADS
7203
GL
Gl 335A
BD
BD+67 577
Bayer
Sigma 2 Ursae Majoris
Bayer name
Sig2 UMa
Flamsteed
13 Ursae Majoris
Flamsteed name
13 UMa
Distance
20.38
Distance ly
66.48
last precise pa
348
last precise sep
4.27
 
 
ORBITAL ELEMENTS
 
 
Period (P)970y± 118 Periastron (T)1917.39y± 0.12 Semi-major axis (a)5.8a± 0.14
Eccentricity (e)0.801± 0.017 Inclination (i)145.4°± 1.5 Longitude of periastron (ω)332.4°± 1.9
Node (Ω)102.1°± 1.9 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 3.848 353.4
2001 3.881 353.0
2002 3.915 352.6
2003 3.948 352.2
2004 3.981 351.8
2005 4.014 351.4
2006 4.047 351.1
2007 4.079 350.7
2008 4.112 350.3
2009 4.144 350.0
2010 4.177 349.6
2011 4.209 349.3
2012 4.241 348.9
2013 4.273 348.6
2014 4.305 348.2
2015 4.337 347.9
2016 4.368 347.6
2017 4.400 347.3
2018 4.431 346.9
2019 4.462 346.6
2020 4.494 346.3
2021 4.525 346.0
2022 4.556 345.7
2023 4.586 345.4
2024 4.617 345.1
2025 4.647 344.9
2026 4.678 344.6
2027 4.708 344.3
2028 4.738 344.0
2029 4.768 343.7
2030 4.798 343.5

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

grafico orbita





wds09104%2B6708c.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
09104+6708 STF1306 AB 2006 205 351 4.1 4.87 8.85 F7V NOD 091023.53+670803.3
09104+6708 STF1306 AB 2007 207 351 4.2 4.87 8.85 F7V NOD 091023.53+670803.3
09104+6708 STF1306 AB 2008 213 350 4.1 4.87 8.85 F7V NOD 091023.53+670803.3
09104+6708 STF1306 AB 2009 215 352 4.0 4.87 8.85 F7V NOD 091023.53+670803.3
09104+6708 STF1306 AB 2010 216 350 4.3 4.87 8.85 F7V NOD 091023.53+670803.3
09104+6708 STF1306 AB 2012 221 349 4.3 4.87 8.85 F7V NOD 091023.53+670803.3
09104+6708 STF1306 AB 2013 224 349 4.3 4.87 8.85 F7V NOD 091023.53+670803.3
09104+6708 STF1306 AB 2015 225 348 4.5 4.87 8.85 F7V NO 091023.53+670803.3
09104+6708 STF1306 AB 2016 227 348 4.3 4.87 8.85 F7V NO 091023.53+670803.3

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