08539+1958 COU 773 (HD 75974)
08h 53m 55.35s +19° 58' 01.7" P.A. 74.00 sep 0.1 mag 7.32,7.86 Sp F8 dist. 164.74 pc (537.38 l.y.)
Coord 2000 |
08539+1958 |
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Discov num |
COU 773 |
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Comp |
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Coord arcsec 2000 |
08 53 55.35 +19 58 01.7 |
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Date first |
1972 |
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Date last |
2014 |
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Obs |
44 |
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Pa first |
30 |
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Pa last |
74.2 |
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P.A. Now (θ) |
74.2° |
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Sep first |
0.2 |
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Sep last |
0.079 |
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Sep. Now (ρ) |
0.079" |
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Mag pri |
7.32 |
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Mag sec |
7.86 |
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delta mag (ΔM) |
0.54 |
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Spectral class |
F8 (yellow-white) |
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Pri motion ra |
-024 |
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Sec motion ra |
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Pri motion dec |
-009 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 75974 |
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Constellation |
Cancer |
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SAO |
80491 |
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HIP |
43683 |
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Tycho2 |
1397-00178-1 |
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Gaia DR2 |
660794844638679808 |
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HD |
75974 |
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GC |
12284 |
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BD |
BD+20 2232 |
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Distance |
164.74 |
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Distance ly |
537.38 |
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ORBITAL ELEMENTS
Period (P) | 165.3y | ± 7.7 |
Periastron (T) | 2019.5y | ± 2.1 |
Semi-major axis (a) | 0.232a | ± 0.007 |
Eccentricity (e) | 0.213 | ± 0.008 |
Inclination (i) | 76.5° | ± 0.2 |
Longitude of periastron (ω) | 86.6° | ± 7.2 |
Node (Ω) | 45.2° | ± 0.1 |
Notes | | |
Reference | Ksr2021 | |
Equinox | | |
Last observation | 2006 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
51.2 |
0.185 |
2001 |
52.0 |
0.180 |
2002 |
52.8 |
0.174 |
2003 |
53.7 |
0.167 |
2004 |
54.7 |
0.161 |
2005 |
55.8 |
0.154 |
2006 |
57.0 |
0.146 |
2007 |
58.3 |
0.139 |
2008 |
59.8 |
0.131 |
2009 |
61.5 |
0.123 |
2010 |
63.4 |
0.114 |
2011 |
65.6 |
0.106 |
2012 |
68.1 |
0.097 |
2013 |
71.2 |
0.089 |
2014 |
75.0 |
0.080 |
2015 |
79.6 |
0.072 |
2016 |
85.5 |
0.064 |
2017 |
92.9 |
0.056 |
2018 |
102.4 |
0.050 |
2019 |
114.2 |
0.045 |
2020 |
128.0 |
0.043 |
2021 |
142.7 |
0.043 |
2022 |
156.4 |
0.046 |
2023 |
168.1 |
0.050 |
2024 |
177.5 |
0.057 |
2025 |
184.9 |
0.064 |
2026 |
190.7 |
0.072 |
2027 |
195.3 |
0.081 |
2028 |
199.0 |
0.089 |
2029 |
202.1 |
0.098 |
2030 |
204.6 |
0.106 |
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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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