08531+5457 A 1584 (HD 75553)
08h 53m 08.05s +54° 57' 11.0" P.A. 97.00 sep 0.6 mag 8.99,7.72 Sp G0 dist. 52.11 pc (169.98 l.y.)
Coord 2000 |
08531+5457 |
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Discov num |
A 1584 |
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Comp |
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Coord arcsec 2000 |
08 53 08.05 +54 57 11.0 |
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Date first |
1907 |
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Date last |
2022 |
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Obs |
120 |
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Pa first |
168 |
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Pa last |
97.4 |
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P.A. Now (θ) |
100.7° |
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Sep first |
0.3 |
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Sep last |
0.63 |
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Sep. Now (ρ) |
0.664" |
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Mag pri |
8.99 |
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Mag sec |
7.72 |
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delta mag (ΔM) |
1.27 |
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Spectral class |
G0 (yellow) |
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Pri motion ra |
+038 |
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Sec motion ra |
+038 |
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Pri motion dec |
+042 |
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Sec motion dec |
+042 |
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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 75553 |
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Constellation |
Ursa Major |
|
SAO |
27027 |
|
HIP |
43630 |
|
Tycho2 |
3798-01356-1 |
|
HD |
75553 |
|
GC |
12238 |
|
ADS |
7054 |
|
BD |
BD+55 1297 |
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Distance |
52.11 |
|
Distance ly |
169.98 |
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ORBITAL ELEMENTS
Period (P) | 70.89y | |
Periastron (T) | 1985.01y | |
Semi-major axis (a) | 0.419a | |
Eccentricity (e) | 0.712 | |
Inclination (i) | 33.2° | |
Longitude of periastron (ω) | 39.5° | |
Node (Ω) | 243.1° | |
Notes | n | |
Reference | Msn2014a | |
Equinox | 2000 | |
Last observation | 2013 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
71.0 |
0.536 |
2001 |
72.8 |
0.553 |
2002 |
74.4 |
0.569 |
2003 |
76.0 |
0.583 |
2004 |
77.5 |
0.596 |
2005 |
79.0 |
0.609 |
2006 |
80.3 |
0.619 |
2007 |
81.7 |
0.629 |
2008 |
83.0 |
0.638 |
2009 |
84.3 |
0.646 |
2010 |
85.5 |
0.653 |
2011 |
86.7 |
0.659 |
2012 |
87.9 |
0.664 |
2013 |
89.1 |
0.668 |
2014 |
90.3 |
0.671 |
2015 |
91.4 |
0.674 |
2016 |
92.6 |
0.675 |
2017 |
93.7 |
0.676 |
2018 |
94.9 |
0.676 |
2019 |
96.0 |
0.675 |
2020 |
97.2 |
0.673 |
2021 |
98.3 |
0.671 |
2022 |
99.5 |
0.668 |
2023 |
100.7 |
0.664 |
2024 |
101.9 |
0.659 |
2025 |
103.1 |
0.654 |
2026 |
104.3 |
0.647 |
2027 |
105.6 |
0.640 |
2028 |
106.9 |
0.633 |
2029 |
108.2 |
0.624 |
2030 |
109.6 |
0.615 |
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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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