11537+7345 BU 794 AB (HD 103246)
11h 53m 43.07s +73° 45' 21.6" P.A. 63.00 sep 0.5 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 |
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Coord arcsec 2000 |
11 53 43.07 +73 45 21.6 |
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Date first |
1881 |
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Date last |
2018 |
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Obs |
130 |
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Pa first |
107 |
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Pa last |
63.1 |
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P.A. Now (θ) |
77.8° |
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Sep first |
0.4 |
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Sep last |
0.48 |
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Sep. Now (ρ) |
0.509" |
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Mag pri |
7.23 |
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Mag sec |
8.32 |
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delta mag (ΔM) |
1.09 |
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Spectral class |
F8V (yellow-white) |
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Pri motion ra |
-048 |
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Sec motion ra |
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Pri motion dec |
-117 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
11537+7345 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 103246 |
7445 |
11 53 43 +73 45 22 |
BU 794 AB |
2018 |
130 |
63 |
0.5 |
7.23 |
8.32 |
1.09 |
Y |
<=== |
Show |
|
7445 |
11 53 43 +73 45 22 |
BU 794 AB,C |
2015 |
8 |
81 |
5.7 |
6.84 |
16.50 |
9.66 |
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Show |
|
7445 |
11 53 43 +73 45 22 |
BU 794 AB,D |
2015 |
8 |
59 |
37.0 |
6.84 |
14.70 |
7.86 |
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Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 103246 |
|
Constellation |
Draco |
|
SAO |
7445 |
|
HIP |
57994 |
|
Tycho2 |
4399-01256-1 |
|
Gaia DR2 |
1075979849854380032 |
|
HD |
103246 |
|
GC |
16266 |
|
ADS |
8337 |
|
BD |
BD+74 476 |
|
Distance |
58.17 |
|
Distance ly |
189.75 |
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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° | |
Notes | n | |
Reference | Sod1999 | |
Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
26.3 |
0.403 |
2001 |
29.4 |
0.418 |
2002 |
32.3 |
0.432 |
2003 |
35.1 |
0.444 |
2004 |
37.7 |
0.455 |
2005 |
40.2 |
0.465 |
2006 |
42.6 |
0.474 |
2007 |
45.0 |
0.482 |
2008 |
47.2 |
0.489 |
2009 |
49.4 |
0.495 |
2010 |
51.6 |
0.500 |
2011 |
53.7 |
0.505 |
2012 |
55.7 |
0.508 |
2013 |
57.8 |
0.511 |
2014 |
59.8 |
0.513 |
2015 |
61.8 |
0.515 |
2016 |
63.8 |
0.516 |
2017 |
65.8 |
0.516 |
2018 |
67.8 |
0.516 |
2019 |
69.8 |
0.516 |
2020 |
71.8 |
0.515 |
2021 |
73.8 |
0.513 |
2022 |
75.8 |
0.511 |
2023 |
77.8 |
0.509 |
2024 |
79.9 |
0.506 |
2025 |
82.0 |
0.503 |
2026 |
84.1 |
0.500 |
2027 |
86.2 |
0.496 |
2028 |
88.4 |
0.493 |
2029 |
90.6 |
0.488 |
2030 |
92.9 |
0.484 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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