13007+5622 BU 1082 (78 UMa)

 
 
13H 00M 43.59S +56 21' 58.8" P.A. 135.3 SEP 0.68 MAG 5.02,7.88 SP F2V DIST. 25.45 PC (83.02 L.Y.)
 
 
Coord 2000
13007+5622
Discov num
BU 1082
Comp
Coord arcsec 2000
13 00 43.59 +56 21 58.8
Date first
1889
Date last
2014
Obs
138
Pa first
73
Pa last
114
P.A. Now (θ)
135.3°
Sep first
1.5
Sep last
0.9
Sep. Now (ρ)
0.68"
Mag pri
5.02
Mag sec
7.88
delta mag (ΔM)
2.86
Spectral class
F2V (yellow-white)
Pri motion ra
+107
Sec motion ra
Pri motion dec
-011
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
78 UMa
Constellation
Ursa Major
SAO
28601
HIP
63503
Tycho2
3845-01189-1
HD
113139
HR
4931
GC
17664
ADS
8739
BD
BD+57 1408
Flamsteed
78 Ursae Majoris
Flamsteed name
78 UMa
Distance
25.45
Distance ly
83.02
last precise pa
113.8
last precise sep
0.879
 
 
ORBITAL ELEMENTS
 
 
Period (P)104.9y± 0.6 Periastron (T)1921.224y± 0.403 Semi-major axis (a)1.208a± 0.01
Eccentricity (e)0.388± 0.009 Inclination (i)46.9°± 0.9 Longitude of periastron (ω)119.2°± 1.5
Node (Ω)88°± 1.1 Note Grade3(1=Definitive, 9=Indet.)
Equinox Last observation2012
label rho theta
2000 1.358 80.2
2001 1.340 81.9
2002 1.320 83.7
2003 1.297 85.6
2004 1.273 87.5
2005 1.246 89.5
2006 1.216 91.6
2007 1.184 93.7
2008 1.149 96.1
2009 1.111 98.5
2010 1.071 101.2
2011 1.029 104.0
2012 0.983 107.2
2013 0.936 110.6
2014 0.886 114.4
2015 0.835 118.6
2016 0.783 123.5
2017 0.731 129.0
2018 0.681 135.3
2019 0.633 142.6
2020 0.591 151.1
2021 0.556 160.7
2022 0.532 171.4
2023 0.521 182.8
2024 0.523 194.5
2025 0.539 205.7
2026 0.566 216.1
2027 0.600 225.4
2028 0.640 233.6
2029 0.681 240.8
2030 0.722 247.3

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic