13239+5456 PEA   1Aa,Ab

 
 
13H 23M 55.42S +54 55' 31.5" P.A. 34 MAG 2.23, SP A1VPSRSI DIST. 26.31 PC (85.82 L.Y.)
 
 
Coord 2000
13239+5456
Discov num
PEA   1
Comp
Aa,Ab
Coord arcsec 2000
13 23 55.42 +54 55 31.5
Date first
1925
Date last
2004
Obs
63
Pa first
247
Pa last
34
P.A. Now (θ)
34°
Sep first
0
Sep last
0
Sep. Now (ρ)
0"
Mag pri
2.23
Mag sec
delta mag (ΔM)
Spectral class
A1VpSrSi (white)
Pri motion ra
+122
Sec motion ra
Pri motion dec
-020
Sec motion dec
Notes
N O (See Notes, Orbital solution)
 
 
13239+5456 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 28737 13239+5456 PEA 1 Aa,Ab 1925 2004 63 34 0.0 2.23 Y <===
Show Mizar, Alcor 28737 13239+5456 STF1744 AB 1755 2015 485 153 14.4 2.23 3.88 1.65
Show 28737 13239+5456 STF1744 AC 1831 2013 12 70 706.9 2.23 4.01 1.78
Show 28737 13239+5456 SMR 4 AD 1913 2013 9 100 493.2 2.23 7.62 5.39
Show 28737 13239+5456 SHY 247 AE 1991 1999 3 321 999.9 2.23 6.88 4.65
Show 28737 13239+5456 SHY 247 AF 1991 1999 3 359 999.9 2.23 9.86 7.63
Show 28751 13239+5456 PSF 1 Ca,Cb 2007 2009 5 207 1.0 4.01 8.00 3.99
Show 28751 13239+5456 SHY 248 CE 1991 1999 3 317 999.9 4.01 6.88 2.87
Show 28751 13239+5456 SHY 248 CF 1991 1999 3 355 999.9 4.01 9.86 5.85
Show 28751 13239+5456 SHY 248 CG 1991 1999 3 271 999.9 4.01 8.21 4.20
Show 28751 13239+5456 SHY 248 CH 1991 1999 3 243 999.9 4.01 8.63 4.62
Decuple system
8 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Ursa Major
SAO
28737
HIP
65378
HD
116656
HR
5054
GC
18133
ADS
8891
GL
NN 3783A
BD
BD+55 1598
Bayer
Zeta Ursae Majoris
Bayer name
Zet UMa
Flamsteed
79 Ursae Majoris
Flamsteed name
79 UMa
Distance
26.31
Distance ly
85.82
last precise pa
33.7
last precise sep
0.008
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)20.53835d± 0.00005 Periastron (T)47636.07d (1989.299y)± 0.02 Semi-major axis (a)9.83m± 0.03
Eccentricity (e)0.5354± 0.0025 Inclination (i)60.5°± 0.3 Longitude of periastron (ω)104.3°± 0.3
Node (Ω)106°± 0.4 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000-01-01 0.007 349.7
2001-01-01 0.007 291.8
2002-01-01 0.009 102.5
2003-01-01 0.010 70.5
2004-01-01 0.007 27.5
2005-01-01 0.007 326.9
2006-01-01 0.002 225.7
2007-01-01 0.010 89.3
2008-01-01 0.009 56.9
2009-01-01 0.007 4.4
2010-01-01 0.008 306.0
2011-01-01 0.007 115.2
2012-01-01 0.010 77.9
2013-01-01 0.008 40.0
2014-01-01 0.007 340.6
2015-01-01 0.006 279.6
2016-01-01 0.009 96.9
2017-01-01 0.010 65.6
2018-01-01 0.007 18.9
2019-01-01 0.008 318.8
2020-01-01 0.003 150.2
2021-01-01 0.010 84.8
2022-01-01 0.009 50.8
2023-01-01 0.007 355.1
2024-01-01 0.007 297.4
2025-01-01 0.008 106.4
2026-01-01 0.010 73.3
2027-01-01 0.008 32.3
2028-01-01 0.007 331.9
2029-01-01 0.004 256.8
2030-01-01 0.010 92.0

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

grafico orbita





grafico misure orbit6
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)36.5y± 2 Periastron (T)1994.8y± 1 Semi-major axis (a)0.78a± 0.03
Eccentricity (e)0.6± 0.2 Inclination (i)93°± 7 Longitude of periastron (ω)287°± 14
Node (Ω)32°± 10 Note Grade9(1=Definitive, 9=Indet.)
Equinox Last observation
label rho theta
2000 0.477 28.4
2001 0.437 27.2
2002 0.387 25.7
2003 0.330 23.8
2004 0.268 20.9
2005 0.203 16.3
2006 0.138 7.3
2007 0.081 344.3
2008 0.064 286.6
2009 0.108 247.4
2010 0.171 233.8
2011 0.237 227.6
2012 0.303 224.1
2013 0.367 221.8
2014 0.429 220.2
2015 0.488 219.0
2016 0.544 218.1
2017 0.595 217.3
2018 0.642 216.6
2019 0.684 216.1
2020 0.719 215.6
2021 0.747 215.1
2022 0.766 214.7
2023 0.776 214.2
2024 0.773 213.8
2025 0.755 213.4
2026 0.719 212.9
2027 0.659 212.4
2028 0.567 211.7
2029 0.432 210.7
2030 0.238 208.4

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

grafico orbita





grafico misure orbit6