Double Star Calculator - Orbit

Orbital Elements for HU66BC

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:	1335.93055	Year
End-Year:	2714.06945	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU66BC
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 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Izm2019	Reference

Double Star Orbit for HU66BC

WDS 6th Orbit including measures of HU66BC

-- Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements) --

Legend:

Green plus signs:	Visual (micrometric) measures
Violet asterisks:	Photographic measures
Blue symbols:	Various interferometric techniques
Dot-dash line:	Indicates the line of nodes

Ephemeris of HU66BC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.808    23.70
--------------------------
1335.93    2.726   214.71
1345.93    2.724   214.51
1355.93    2.721   214.32
1365.93    2.716   214.12
1375.93    2.709   213.92
1385.93    2.700   213.72
1395.93    2.690   213.52
1405.93    2.678   213.32
1415.93    2.664   213.12
1425.93    2.648   212.91
1435.93    2.631   212.71
1445.93    2.612   212.49
1455.93    2.591   212.28
1465.93    2.568   212.06
1475.93    2.543   211.84
1485.93    2.516   211.61
1495.93    2.487   211.38
1505.93    2.457   211.14
1515.93    2.424   210.90
1525.93    2.390   210.65
1535.93    2.353   210.39
1545.93    2.315   210.12
1555.93    2.274   209.85
1565.93    2.231   209.56
1575.93    2.186   209.26
1585.93    2.139   208.95
1595.93    2.090   208.63
1605.93    2.039   208.29
1615.93    1.985   207.93
1625.93    1.929   207.55
1635.93    1.871   207.15
1645.93    1.811   206.72
1655.93    1.748   206.26
1665.93    1.683   205.77
1675.93    1.616   205.24
1685.93    1.546   204.65
1695.93    1.474   204.02
1705.93    1.399   203.31
1715.93    1.322   202.53
1725.93    1.243   201.65
1735.93    1.161   200.64
1745.93    1.077   199.48
1755.93    0.991   198.12
1765.93    0.903   196.50
1775.93    0.814   194.53
1785.93    0.723   192.06
1795.93    0.631   188.88
1805.93    0.539   184.61
1815.93    0.449   178.61
1825.93    0.365   169.74
1835.93    0.293   156.03
1845.93    0.245   135.32
1855.93    0.238   109.52
1865.93    0.275    86.74
1875.93    0.341    71.09
1885.93    0.421    60.95
1895.93    0.506    54.13
1905.93    0.590    49.26
1915.93    0.670    45.59
1925.93    0.743    42.68
1935.93    0.807    40.27
1945.93    0.860    38.18
1955.93    0.899    36.30
1965.93    0.926    34.57
1975.93    0.938    32.90
1985.93    0.936    31.25
1995.93    0.921    29.57
2005.93    0.894    27.80
2015.93    0.856    25.91
2025.93    0.810    23.82
2035.93    0.757    21.46
2045.93    0.698    18.72
2055.93    0.636    15.45
2065.93    0.571    11.45
2075.93    0.506     6.43
2085.93    0.443   359.94
2095.93    0.385   351.41
2105.93    0.337   340.16
2115.93    0.304   325.85
2125.93    0.293   309.31
2135.93    0.305   292.82
2145.93    0.339   278.66
2155.93    0.389   267.57
2165.93    0.448   259.20
2175.93    0.514   252.89
2185.93    0.583   248.03
2195.93    0.654   244.22
2205.93    0.726   241.17
2215.93    0.799   238.67
2225.93    0.871   236.58
2235.93    0.943   234.81
2245.93    1.014   233.30
2255.93    1.085   231.98
2265.93    1.154   230.82
2275.93    1.222   229.79
2285.93    1.289   228.87
2295.93    1.354   228.03
2305.93    1.418   227.28
2315.93    1.481   226.59
2325.93    1.542   225.95
2335.93    1.602   225.36
2345.93    1.661   224.82
2355.93    1.718   224.31
2365.93    1.773   223.83
2375.93    1.827   223.39
2385.93    1.879   222.96
2395.93    1.930   222.56
2405.93    1.980   222.18
2415.93    2.027   221.82
2425.93    2.074   221.48
2435.93    2.118   221.15
2445.93    2.161   220.83
2455.93    2.203   220.52
2465.93    2.243   220.23
2475.93    2.281   219.95
2485.93    2.318   219.67
2495.93    2.353   219.41
2505.93    2.387   219.15
2515.93    2.419   218.90
2525.93    2.450   218.65
2535.93    2.479   218.41
2545.93    2.506   218.18
2555.93    2.532   217.95
2565.93    2.556   217.73
2575.93    2.579   217.51
2585.93    2.600   217.29
2595.93    2.619   217.08
2605.93    2.637   216.87
2615.93    2.653   216.66
2625.93    2.668   216.45
2635.93    2.681   216.25
2645.93    2.692   216.05
2655.93    2.702   215.85
2665.93    2.710   215.65
2675.93    2.716   215.45
2685.93    2.721   215.26
2695.93    2.724   215.06
2705.93    2.726   214.87

Disclaimer

This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.

Acknowledgements

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.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 17:51:44