11537+7345 BU  794AB

 
 
11H 53M 43.07S +73 45' 21.6" P.A. 65.8 SEP 0.52 MAG 7.23,8.32 SP F8V DIST. 58.17 PC (189.75 L.Y.)
 
 
Coord 2000
11537+7345
Discov num
BU  794
Comp
AB
Coord arcsec 2000
11 53 43.07 +73 45 21.6
Date first
1881
Date last
2009
Obs
128
Pa first
107
Pa last
50
P.A. Now (θ)
65.8°
Sep first
0.4
Sep last
0.5
Sep. Now (ρ)
0.52"
Mag pri
7.23
Mag sec
8.32
delta mag (ΔM)
1.09
Spectral class
F8V (yellow-white)
Pri motion ra
-055
Sec motion ra
Pri motion dec
-128
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
11537+7345 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 7445 11537+7345 BU 794 AB 1881 2009 128 66 0.5 7.23 8.32 1.09 Y <===
Show 7445 11537+7345 BU 794 AB,C 1886 2004 8 29 13.8 6.84 16.50 9.66
Show 7445 11537+7345 BU 794 AB,D 1890 2012 5 60 36.5 6.84 14.70 7.86
Quadruple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Draco
SAO
7445
HIP
57994
Tycho2
4399-01256-1
HD
103246
ADS
8337
BD
BD+74 476
Distance
58.17
Distance ly
189.75
last precise pa
50.3
last precise sep
0.524
 
 
ORBITAL ELEMENTS
 
 
Period (P)76.7y Periastron (T)1987.3y Semi-major axis (a)0.41a
Eccentricity (e)0.5 Inclination (i)39° Longitude of periastron (ω)247°
Node (Ω)22° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.403 26.3
2001 0.418 29.4
2002 0.432 32.3
2003 0.444 35.1
2004 0.455 37.7
2005 0.465 40.2
2006 0.474 42.6
2007 0.482 45.0
2008 0.489 47.2
2009 0.495 49.4
2010 0.500 51.6
2011 0.505 53.7
2012 0.508 55.7
2013 0.511 57.8
2014 0.513 59.8
2015 0.515 61.8
2016 0.516 63.8
2017 0.516 65.8
2018 0.516 67.8
2019 0.516 69.8
2020 0.515 71.8
2021 0.513 73.8
2022 0.511 75.8
2023 0.509 77.8
2024 0.506 79.9
2025 0.503 82.0
2026 0.500 84.1
2027 0.496 86.2
2028 0.493 88.4
2029 0.488 90.6
2030 0.484 92.9

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