Double Star Calculator - Orbit

Orbital Elements for AC8

WDS:	AC8	WDS ID/Discoverer
P:	1778.000	Orbital period (years)
a:	0.976	Semi-major axis (arcseconds)
i:	67.5	Inclination (degrees)
Ω:	123.9	Longitude of ascending node (degrees)
T:	2018.000	Epoch of periastron passage (year)
e:	0.94	Eccentricity
ω:	256.5	Longitude of periastron (degrees)
Start-Year:	1136.0	Year
End-Year:	2914.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for AC8
Position:	175252.59+294049.7	Epoch-2000 right ascension and declination
WDS-ID:	17529+2941	WDS designation
Discoverer Code:	AC8	Discover designation and components
ADS number:	10866	Aitken Double Star catalog
HD number:	163032	HD catalog number
Hipparcos number:	87524	Hipparcos catalog number
V1:	9.09	Magnitude of the primary
V2:	8.49	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Zir2014a	Reference

Double Star Orbit for AC8

WDS 6th Orbit including measures of AC8

-- 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 AC8

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.119   120.04
--------------------------
1136.00    0.830   182.05
1146.00    0.827   182.42
1156.00    0.824   182.79
1166.00    0.821   183.16
1176.00    0.818   183.54
1186.00    0.815   183.91
1196.00    0.811   184.30
1206.00    0.808   184.68
1216.00    0.804   185.07
1226.00    0.801   185.46
1236.00    0.797   185.85
1246.00    0.793   186.25
1256.00    0.789   186.65
1266.00    0.785   187.06
1276.00    0.781   187.47
1286.00    0.777   187.88
1296.00    0.772   188.30
1306.00    0.768   188.73
1316.00    0.763   189.16
1326.00    0.759   189.59
1336.00    0.754   190.03
1346.00    0.749   190.48
1356.00    0.744   190.93
1366.00    0.739   191.39
1376.00    0.734   191.85
1386.00    0.729   192.32
1396.00    0.723   192.80
1406.00    0.718   193.29
1416.00    0.712   193.78
1426.00    0.707   194.28
1436.00    0.701   194.79
1446.00    0.695   195.30
1456.00    0.689   195.83
1466.00    0.683   196.36
1476.00    0.677   196.91
1486.00    0.671   197.46
1496.00    0.665   198.03
1506.00    0.658   198.60
1516.00    0.652   199.19
1526.00    0.645   199.79
1536.00    0.639   200.40
1546.00    0.632   201.02
1556.00    0.625   201.66
1566.00    0.618   202.31
1576.00    0.611   202.98
1586.00    0.604   203.66
1596.00    0.596   204.36
1606.00    0.589   205.08
1616.00    0.581   205.81
1626.00    0.574   206.57
1636.00    0.566   207.34
1646.00    0.558   208.14
1656.00    0.551   208.96
1666.00    0.543   209.80
1676.00    0.535   210.67
1686.00    0.526   211.56
1696.00    0.518   212.49
1706.00    0.510   213.44
1716.00    0.501   214.43
1726.00    0.493   215.45
1736.00    0.484   216.50
1746.00    0.475   217.60
1756.00    0.466   218.74
1766.00    0.457   219.92
1776.00    0.448   221.15
1786.00    0.439   222.43
1796.00    0.429   223.77
1806.00    0.420   225.16
1816.00    0.410   226.63
1826.00    0.400   228.16
1836.00    0.390   229.77
1846.00    0.380   231.47
1856.00    0.370   233.25
1866.00    0.360   235.14
1876.00    0.349   237.15
1886.00    0.339   239.28
1896.00    0.328   241.55
1906.00    0.316   243.98
1916.00    0.305   246.59
1926.00    0.293   249.42
1936.00    0.280   252.49
1946.00    0.267   255.86
1956.00    0.253   259.58
1966.00    0.238   263.77
1976.00    0.221   268.56
1986.00    0.200   274.24
1996.00    0.175   281.37
2006.00    0.136   291.70
2016.00    0.052   322.04
2026.00    0.113   119.11
2036.00    0.200   129.73
2046.00    0.259   134.53
2056.00    0.306   137.69
2066.00    0.345   140.07
2076.00    0.379   141.99
2086.00    0.409   143.61
2096.00    0.437   145.01
2106.00    0.462   146.26
2116.00    0.484   147.39
2126.00    0.506   148.42
2136.00    0.525   149.36
2146.00    0.544   150.25
2156.00    0.561   151.07
2166.00    0.577   151.85
2176.00    0.593   152.58
2186.00    0.607   153.28
2196.00    0.621   153.95
2206.00    0.634   154.59
2216.00    0.647   155.20
2226.00    0.658   155.80
2236.00    0.670   156.37
2246.00    0.680   156.92
2256.00    0.691   157.46
2266.00    0.701   157.98
2276.00    0.710   158.48
2286.00    0.719   158.98
2296.00    0.727   159.46
2306.00    0.736   159.93
2316.00    0.743   160.39
2326.00    0.751   160.84
2336.00    0.758   161.28
2346.00    0.765   161.72
2356.00    0.771   162.14
2366.00    0.777   162.56
2376.00    0.783   162.98
2386.00    0.789   163.38
2396.00    0.794   163.79
2406.00    0.800   164.18
2416.00    0.804   164.57
2426.00    0.809   164.96
2436.00    0.813   165.34
2446.00    0.818   165.72
2456.00    0.822   166.10
2466.00    0.825   166.47
2476.00    0.829   166.84
2486.00    0.832   167.20
2496.00    0.835   167.56
2506.00    0.838   167.92
2516.00    0.841   168.28
2526.00    0.844   168.63
2536.00    0.846   168.99
2546.00    0.848   169.34
2556.00    0.850   169.69
2566.00    0.852   170.04
2576.00    0.854   170.38
2586.00    0.855   170.73
2596.00    0.857   171.07
2606.00    0.858   171.41
2616.00    0.859   171.75
2626.00    0.860   172.09
2636.00    0.861   172.43
2646.00    0.861   172.77
2656.00    0.862   173.11
2666.00    0.862   173.45
2676.00    0.862   173.79
2686.00    0.863   174.13
2696.00    0.862   174.47
2706.00    0.862   174.81
2716.00    0.862   175.14
2726.00    0.861   175.48
2736.00    0.861   175.82
2746.00    0.860   176.16
2756.00    0.859   176.50
2766.00    0.858   176.85
2776.00    0.857   177.19
2786.00    0.856   177.53
2796.00    0.855   177.88
2806.00    0.853   178.22
2816.00    0.851   178.57
2826.00    0.850   178.92
2836.00    0.848   179.27
2846.00    0.846   179.62
2856.00    0.844   179.97
2866.00    0.842   180.32
2876.00    0.840   180.68
2886.00    0.837   181.04
2896.00    0.835   181.40
2906.00    0.832   181.76

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 17:43:54