Double Star Calculator - Orbit

Orbital Elements for I385AB
WDS: I385AB WDS ID/Discoverer
P: 2000.000 Orbital period (years)
a: 1.13 Semi-major axis (arcseconds)
i: 111.0 Inclination (degrees)
Ω: 243.6 Longitude of ascending node (degrees)
T: 1566.000 Epoch of periastron passage (year)
e: 0.12 Eccentricity
ω: 12.1 Longitude of periastron (degrees)
Start-Year: 1025.0 Year
End-Year: 3025.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for I385AB
Position: 172445.86-591249.1 Epoch-2000 right ascension and declination
WDS-ID: 17248-5913 WDS designation
Discoverer Code: I385AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 157081 HD catalog number
Hipparcos number: 85216 Hipparcos catalog number
V1: 7.56 Magnitude of the primary
V2: 8.65 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2022 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: Tok2023c Reference

Double Star Orbit for I385AB



WDS 6th Orbit including measures of I385AB

-- 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 I385AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.528   110.14
--------------------------
1025.00    0.447   356.34
1035.00    0.435   352.12
1045.00    0.425   347.70
1055.00    0.417   343.08
1065.00    0.412   338.32
1075.00    0.409   333.47
1085.00    0.409   328.58
1095.00    0.412   323.72
1105.00    0.417   318.95
1115.00    0.424   314.32
1125.00    0.434   309.86
1135.00    0.445   305.62
1145.00    0.459   301.62
1155.00    0.474   297.85
1165.00    0.490   294.33
1175.00    0.508   291.05
1185.00    0.527   288.00
1195.00    0.547   285.16
1205.00    0.567   282.52
1215.00    0.588   280.06
1225.00    0.609   277.77
1235.00    0.630   275.64
1245.00    0.651   273.65
1255.00    0.673   271.78
1265.00    0.694   270.03
1275.00    0.715   268.38
1285.00    0.736   266.83
1295.00    0.756   265.36
1305.00    0.776   263.96
1315.00    0.795   262.64
1325.00    0.814   261.37
1335.00    0.832   260.17
1345.00    0.850   259.01
1355.00    0.866   257.90
1365.00    0.882   256.83
1375.00    0.897   255.80
1385.00    0.911   254.80
1395.00    0.924   253.83
1405.00    0.937   252.88
1415.00    0.948   251.96
1425.00    0.958   251.06
1435.00    0.967   250.18
1445.00    0.975   249.31
1455.00    0.981   248.46
1465.00    0.987   247.61
1475.00    0.991   246.78
1485.00    0.994   245.95
1495.00    0.996   245.12
1505.00    0.997   244.30
1515.00    0.997   243.47
1525.00    0.995   242.65
1535.00    0.992   241.82
1545.00    0.988   240.99
1555.00    0.982   240.15
1565.00    0.976   239.29
1575.00    0.968   238.43
1585.00    0.959   237.55
1595.00    0.949   236.65
1605.00    0.938   235.73
1615.00    0.925   234.79
1625.00    0.912   233.82
1635.00    0.898   232.82
1645.00    0.882   231.79
1655.00    0.866   230.72
1665.00    0.848   229.61
1675.00    0.830   228.44
1685.00    0.811   227.23
1695.00    0.791   225.96
1705.00    0.771   224.62
1715.00    0.750   223.20
1725.00    0.728   221.71
1735.00    0.706   220.12
1745.00    0.684   218.42
1755.00    0.661   216.61
1765.00    0.638   214.68
1775.00    0.615   212.59
1785.00    0.592   210.35
1795.00    0.570   207.92
1805.00    0.547   205.30
1815.00    0.526   202.46
1825.00    0.505   199.38
1835.00    0.485   196.03
1845.00    0.466   192.41
1855.00    0.448   188.49
1865.00    0.433   184.27
1875.00    0.419   179.76
1885.00    0.408   174.96
1895.00    0.399   169.93
1905.00    0.393   164.70
1915.00    0.389   159.34
1925.00    0.389   153.94
1935.00    0.392   148.58
1945.00    0.398   143.33
1955.00    0.406   138.26
1965.00    0.418   133.44
1975.00    0.431   128.89
1985.00    0.447   124.64
1995.00    0.464   120.69
2005.00    0.483   117.04
2015.00    0.503   113.68
2025.00    0.525   110.58
2035.00    0.547   107.73
2045.00    0.570   105.11
2055.00    0.594   102.69
2065.00    0.618   100.46
2075.00    0.642    98.40
2085.00    0.666    96.48
2095.00    0.691    94.71
2105.00    0.715    93.05
2115.00    0.740    91.50
2125.00    0.764    90.06
2135.00    0.788    88.70
2145.00    0.811    87.42
2155.00    0.835    86.21
2165.00    0.858    85.07
2175.00    0.880    83.99
2185.00    0.903    82.96
2195.00    0.924    81.98
2205.00    0.946    81.04
2215.00    0.966    80.15
2225.00    0.986    79.29
2235.00    1.006    78.47
2245.00    1.025    77.67
2255.00    1.043    76.91
2265.00    1.060    76.17
2275.00    1.077    75.45
2285.00    1.094    74.76
2295.00    1.109    74.08
2305.00    1.124    73.43
2315.00    1.138    72.79
2325.00    1.152    72.17
2335.00    1.164    71.56
2345.00    1.176    70.96
2355.00    1.187    70.37
2365.00    1.198    69.80
2375.00    1.208    69.23
2385.00    1.216    68.68
2395.00    1.225    68.13
2405.00    1.232    67.59
2415.00    1.238    67.05
2425.00    1.244    66.52
2435.00    1.249    65.99
2445.00    1.253    65.47
2455.00    1.257    64.95
2465.00    1.259    64.44
2475.00    1.261    63.92
2485.00    1.262    63.41
2495.00    1.262    62.89
2505.00    1.262    62.38
2515.00    1.260    61.87
2525.00    1.258    61.35
2535.00    1.255    60.83
2545.00    1.251    60.31
2555.00    1.247    59.79
2565.00    1.242    59.26
2575.00    1.236    58.73
2585.00    1.229    58.19
2595.00    1.221    57.64
2605.00    1.213    57.09
2615.00    1.204    56.53
2625.00    1.194    55.96
2635.00    1.184    55.38
2645.00    1.173    54.80
2655.00    1.161    54.19
2665.00    1.148    53.58
2675.00    1.135    52.95
2685.00    1.121    52.31
2695.00    1.106    51.65
2705.00    1.091    50.97
2715.00    1.075    50.28
2725.00    1.059    49.56
2735.00    1.041    48.82
2745.00    1.024    48.05
2755.00    1.006    47.25
2765.00    0.987    46.43
2775.00    0.967    45.57
2785.00    0.948    44.68
2795.00    0.927    43.75
2805.00    0.907    42.78
2815.00    0.886    41.76
2825.00    0.864    40.69
2835.00    0.842    39.57
2845.00    0.820    38.39
2855.00    0.798    37.14
2865.00    0.775    35.82
2875.00    0.752    34.41
2885.00    0.730    32.92
2895.00    0.707    31.34
2905.00    0.684    29.65
2915.00    0.661    27.84
2925.00    0.638    25.90
2935.00    0.616    23.81
2945.00    0.594    21.58
2955.00    0.572    19.17
2965.00    0.551    16.57
2975.00    0.531    13.78
2985.00    0.511    10.76
2995.00    0.493     7.52
3005.00    0.476     4.04
3015.00    0.461     0.31






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 17:38:16



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