11037+6145 BU 1077AB (Dubhe)

 
 
11h 03m 43.84s +61 45' 04.0" P.A. 337.6 sep 0.8 mag 2.02,4.95 Sp G9III dist. 37.68 pc (122.91 l.y.)
 
 
Coord 2000
11037+6145
Discov num
BU 1077
Comp
AB
Coord arcsec 2000
11 03 43.84 +61 45 04.0
Date first
1889
Date last
2017
Obs
83
Pa first
326
Pa last
342
P.A. Now (θ)
337.6°
Sep first
0.9
Sep last
0.8
Sep. Now (ρ)
0.8"
Mag pri
2.02
Mag sec
4.95
delta mag (ΔM)
2.93
Spectral class
G9III (yellow)
Pri motion ra
-119
Sec motion ra
Pri motion dec
-067
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
11037+6145 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show Dubhe 15384 11037+6145 BU 1077 AB 1889 2017 83 338 0.8 2.02 4.95 2.93 Y <===
Show 11037+6145 BU 1077 AC 1800 1999 13 204 380.6 2.02 7.19 5.17
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
342.3
Precise sep
0.806
Common name
Dubhe
Meaning
Bear
Other names
DUBB, AK
Constellation
Ursa Major
SAO
15384
HIP
54061
HD
95689
HR
4301
GC
15185
ADS
8035
BD
BD+62 1161
Bayer
Alpha Ursae Majoris
Bayer name
Alp UMa
Flamsteed
50 Ursae Majoris
Flamsteed name
50 UMa
Distance
37.68
Distance ly
122.91
last precise pa
342.3
last precise sep
0.806
 
 
ORBITAL ELEMENTS
 
 
Period (P)44.448y± 0.11 Periastron (T)2002.17y± 0.094 Semi-major axis (a)0.59a± 0.026
Eccentricity (e)0.4392± 0.004 Inclination (i)159.9°± 3.5 Longitude of periastron (ω)232.8°± 7.9
Node (Ω)9.3°± 8.2 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000 0.366 183.7
2001 0.338 164.4
2002 0.320 142.2
2003 0.318 118.6
2004 0.335 96.1
2005 0.367 76.6
2006 0.408 60.7
2007 0.453 47.9
2008 0.498 37.3
2009 0.542 28.5
2010 0.582 21.0
2011 0.619 14.4
2012 0.653 8.5
2013 0.683 3.2
2014 0.710 358.3
2015 0.734 353.7
2016 0.754 349.4
2017 0.772 345.4
2018 0.786 341.4
2019 0.798 337.6
2020 0.807 334.0
2021 0.813 330.3
2022 0.817 326.8
2023 0.819 323.2
2024 0.818 319.7
2025 0.814 316.1
2026 0.809 312.5
2027 0.801 308.8
2028 0.791 305.0
2029 0.779 301.2
2030 0.765 297.2

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






wds11037%2B6145a.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
11037+6145 BU 1077 AB 2006 65 57 0.4 2.02 4.95 G9III NOD 110343.84+614504.0
11037+6145 BU 1077 AB 2007 66 44 0.5 2.02 4.95 G9III NOD 110343.84+614504.0
11037+6145 BU 1077 AB 2009 69 26 0.6 2.02 4.95 G9III NOD 110343.84+614504.0
11037+6145 BU 1077 AB 2010 73 18 0.6 2.02 4.95 G9III NOD 110343.84+614504.0
11037+6145 BU 1077 AB 2011 75 10 0.6 2.02 4.95 G9III NOD 110343.84+614504.0
11037+6145 BU 1077 AB 2012 76 5 0.7 2.02 4.95 G9III NOD 110343.84+614504.0
11037+6145 BU 1077 AB 2013 78 0 0.7 2.02 4.95 G9III NOD 110343.84+614504.0
11037+6145 BU 1077 AB 2014 79 355 0.7 2.02 4.95 G9III NO 110343.84+614504.0
11037+6145 BU 1077 AB 2017 81 342 0.8 2.02 4.95 G9III NO 110343.84+614504.0

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