11541+7155 A 75 (HD 103321)
11h 54m 04.36s +71° 55' 27.1" P.A. 26.00 sep 0.3 mag 7.99,9.10 Sp F4V dist. 88.97 pc (290.22 l.y.)
| Coord 2000 |
11541+7155 |
|
Discov num |
A 75 |
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Comp |
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Coord arcsec 2000 |
11 54 04.36 +71 55 27.1 |
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| Date first |
1900 |
|
Date last |
2014 |
|
Obs |
41 |
|
| Pa first |
209 |
|
Pa last |
25.8 |
|
P.A. Now (θ) |
25.8° |
|
| Sep first |
0.3 |
|
Sep last |
0.338 |
|
Sep. Now (ρ) |
0.338" |
|
| Mag pri |
7.99 |
|
Mag sec |
9.10 |
|
delta mag (ΔM) |
1.11 |
|
Spectral class |
F4V (yellow-white) |
|
| Pri motion ra |
-085 |
|
Sec motion ra |
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| Pri motion dec |
-019 |
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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.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 103321 |
|
Constellation |
Draco |
|
SAO |
7446 |
|
HIP |
58026 |
|
| Tycho2 |
4396-00328-1 |
|
Gaia DR2 |
1062832680083647616 |
|
HD |
103321 |
|
ADS |
8344 |
|
| BD |
BD+72 550 |
|
Distance |
88.97 |
|
Distance ly |
290.22 |
|
ORBITAL ELEMENTS
| Period (P) | 82.3y | |
Periastron (T) | 1921.8y | |
Semi-major axis (a) | 0.267a | |
| Eccentricity (e) | 0.08 | |
Inclination (i) | 104.5° | |
Longitude of periastron (ω) | 277.5° | |
| Node (Ω) | 23° | |
Notes | n | |
Reference | Hei1996a | |
| Equinox | | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
156.9 |
0.083 |
| 2001 |
143.6 |
0.071 |
| 2002 |
126.0 |
0.063 |
| 2003 |
105.7 |
0.062 |
| 2004 |
86.9 |
0.068 |
| 2005 |
72.3 |
0.079 |
| 2006 |
61.8 |
0.094 |
| 2007 |
54.3 |
0.110 |
| 2008 |
48.7 |
0.127 |
| 2009 |
44.4 |
0.143 |
| 2010 |
41.0 |
0.159 |
| 2011 |
38.2 |
0.175 |
| 2012 |
35.8 |
0.190 |
| 2013 |
33.8 |
0.203 |
| 2014 |
32.0 |
0.216 |
| 2015 |
30.4 |
0.227 |
| 2016 |
29.0 |
0.236 |
| 2017 |
27.7 |
0.245 |
| 2018 |
26.4 |
0.251 |
| 2019 |
25.2 |
0.257 |
| 2020 |
24.0 |
0.260 |
| 2021 |
22.9 |
0.263 |
| 2022 |
21.8 |
0.263 |
| 2023 |
20.6 |
0.263 |
| 2024 |
19.5 |
0.260 |
| 2025 |
18.3 |
0.257 |
| 2026 |
17.1 |
0.252 |
| 2027 |
15.9 |
0.246 |
| 2028 |
14.6 |
0.238 |
| 2029 |
13.1 |
0.230 |
| 2030 |
11.6 |
0.220 |
|
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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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