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Double Star Calculator - Orbital Elements
- Revision:
$Rev: 1216 $
- Report created:
2025-07-11 18:57:31
WDS:
HU66BC
WDS ID/Discoverer
P:
1378.139
Orbital period (years)
a:
1.843
Semi-major axis (arcseconds)
i:
100.869
Inclination (degrees)
Ω:
33.576
Longitude of ascending node (degrees)
T:
1957.425
Epoch of periastron passage (year)
e:
0.49722
Eccentricity
ω:
347.155
Longitude of periastron (degrees)
Start-Year:
1336.0
Year
End-Year:
2714.0
Year
Epoch:
2025.0
Besselian Epoch
Position:
182518.20+484542.5
Epoch-2000 right ascension and declination
WDS-ID:
18253+4846
WDS designation
Discoverer Code:
HU66BC
Discover designation and components
ADS number:
11344
Aitken Double Star catalog
HD number:
170109B
HD catalog number
Hipparcos number:
90284
Hipparcos catalog number
V1:
8.40
Magnitude of the primary
V2:
8.25
Magnitude of the secondary
Equinox:
Equinox
Date:
2015
Date of last observation
Orbit grade:
5
Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:
n
Flags
Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)
Click to expand/collapse ephemeris:
Year Sep[“] PA[°]
---------------------------------------------
2025.0 0.815 24.0
-------------------------
1336.0 2.726 214.7
1346.0 2.724 214.5
1356.0 2.721 214.3
1366.0 2.715 214.1
1376.0 2.709 213.9
1386.0 2.700 213.7
1396.0 2.690 213.5
1406.0 2.678 213.3
1416.0 2.664 213.1
1426.0 2.648 212.9
1436.0 2.631 212.7
1446.0 2.612 212.5
1456.0 2.590 212.3
1466.0 2.568 212.1
1476.0 2.543 211.8
1486.0 2.516 211.6
1496.0 2.487 211.4
1506.0 2.457 211.1
1516.0 2.424 210.9
1526.0 2.389 210.6
1536.0 2.353 210.4
1546.0 2.314 210.1
1556.0 2.274 209.8
1566.0 2.231 209.6
1576.0 2.186 209.3
1586.0 2.139 209.0
1596.0 2.090 208.6
1606.0 2.038 208.3
1616.0 1.985 207.9
1626.0 1.929 207.5
1636.0 1.871 207.1
1646.0 1.810 206.7
1656.0 1.748 206.3
1666.0 1.683 205.8
1676.0 1.615 205.2
1686.0 1.545 204.7
1696.0 1.473 204.0
1706.0 1.399 203.3
1716.0 1.322 202.5
1726.0 1.242 201.6
1736.0 1.161 200.6
1746.0 1.077 199.5
1756.0 0.991 198.1
1766.0 0.903 196.5
1776.0 0.813 194.5
1786.0 0.722 192.0
1796.0 0.630 188.9
1806.0 0.538 184.6
1816.0 0.449 178.6
1826.0 0.365 169.7
1836.0 0.292 155.9
1846.0 0.244 135.2
1856.0 0.238 109.3
1866.0 0.275 86.6
1876.0 0.342 71.0
1886.0 0.422 60.9
1896.0 0.506 54.1
1906.0 0.590 49.2
1916.0 0.670 45.6
1926.0 0.743 42.7
1936.0 0.807 40.2
1946.0 0.860 38.2
1956.0 0.900 36.3
1966.0 0.926 34.6
1976.0 0.938 32.9
1986.0 0.936 31.2
1996.0 0.921 29.6
2006.0 0.894 27.8
2016.0 0.856 25.9
2026.0 0.810 23.8
2036.0 0.757 21.4
2046.0 0.698 18.7
2056.0 0.635 15.4
2066.0 0.571 11.4
2076.0 0.506 6.4
2086.0 0.443 359.9
2096.0 0.385 351.3
2106.0 0.337 340.1
2116.0 0.304 325.7
2126.0 0.293 309.2
2136.0 0.305 292.7
2146.0 0.339 278.6
2156.0 0.389 267.5
2166.0 0.448 259.2
2176.0 0.514 252.8
2186.0 0.583 248.0
2196.0 0.655 244.2
2206.0 0.727 241.1
2216.0 0.799 238.7
2226.0 0.872 236.6
2236.0 0.944 234.8
2246.0 1.015 233.3
2256.0 1.085 232.0
2266.0 1.154 230.8
2276.0 1.222 229.8
2286.0 1.289 228.9
2296.0 1.355 228.0
2306.0 1.419 227.3
2316.0 1.481 226.6
2326.0 1.543 225.9
2336.0 1.603 225.4
2346.0 1.661 224.8
2356.0 1.718 224.3
2366.0 1.773 223.8
2376.0 1.827 223.4
2386.0 1.880 223.0
2396.0 1.931 222.6
2406.0 1.980 222.2
2416.0 2.028 221.8
2426.0 2.074 221.5
2436.0 2.119 221.1
2446.0 2.162 220.8
2456.0 2.203 220.5
2466.0 2.243 220.2
2476.0 2.282 219.9
2486.0 2.318 219.7
2496.0 2.354 219.4
2506.0 2.387 219.1
2516.0 2.420 218.9
2526.0 2.450 218.6
2536.0 2.479 218.4
2546.0 2.506 218.2
2556.0 2.532 217.9
2566.0 2.556 217.7
2576.0 2.579 217.5
2586.0 2.600 217.3
2596.0 2.619 217.1
2606.0 2.637 216.9
2616.0 2.653 216.7
2626.0 2.668 216.5
2636.0 2.681 216.2
2646.0 2.692 216.0
2656.0 2.702 215.8
2666.0 2.710 215.7
2676.0 2.716 215.5
2686.0 2.721 215.3
2696.0 2.724 215.1
2706.0 2.726 214.9
This result is provided without warranty. For all terms, see the Full Disclaimer .
Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 4.0 .
The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory .
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