Double Star Calculator - Orbit

Orbital Elements for SEE13
WDS: SEE13 WDS ID/Discoverer
P: 1530.340 Orbital period (years)
a: 2.021 Semi-major axis (arcseconds)
i: 67.2 Inclination (degrees)
Ω: 207.0 Longitude of ascending node (degrees)
T: 1846.510 Epoch of periastron passage (year)
e: 0.9 Eccentricity
ω: 148.1 Longitude of periastron (degrees)
Start-Year: 1259.83 Year
End-Year: 2790.17 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for SEE13
Position: 012146.64-240741.0 Epoch-2000 right ascension and declination
WDS-ID: 01218-2408 WDS designation
Discoverer Code: SEE13 Discover designation and components
ADS number: 1102 Aitken Double Star catalog
HD number: 8281 HD catalog number
Hipparcos number: 6367 Hipparcos catalog number
V1: 8.89 Magnitude of the primary
V2: 9.29 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1991 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: Hrt2001b Reference

Double Star Orbit for SEE13



WDS 6th Orbit including measures of SEE13

-- 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 SEE13
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.378   177.00
--------------------------
1259.83    3.370   195.97
1269.83    3.363   196.11
1279.83    3.355   196.26
1289.83    3.346   196.40
1299.83    3.336   196.55
1309.83    3.325   196.69
1319.83    3.313   196.84
1329.83    3.301   196.99
1339.83    3.287   197.14
1349.83    3.272   197.29
1359.83    3.256   197.44
1369.83    3.239   197.59
1379.83    3.221   197.75
1389.83    3.202   197.91
1399.83    3.182   198.07
1409.83    3.161   198.23
1419.83    3.139   198.39
1429.83    3.115   198.56
1439.83    3.091   198.73
1449.83    3.065   198.90
1459.83    3.038   199.07
1469.83    3.010   199.25
1479.83    2.980   199.43
1489.83    2.949   199.61
1499.83    2.917   199.80
1509.83    2.883   200.00
1519.83    2.848   200.19
1529.83    2.811   200.40
1539.83    2.773   200.60
1549.83    2.733   200.82
1559.83    2.691   201.04
1569.83    2.648   201.27
1579.83    2.603   201.50
1589.83    2.556   201.75
1599.83    2.508   202.00
1609.83    2.457   202.26
1619.83    2.404   202.54
1629.83    2.349   202.82
1639.83    2.291   203.13
1649.83    2.231   203.44
1659.83    2.169   203.78
1669.83    2.103   204.13
1679.83    2.035   204.51
1689.83    1.963   204.92
1699.83    1.888   205.36
1709.83    1.809   205.83
1719.83    1.726   206.35
1729.83    1.639   206.93
1739.83    1.546   207.57
1749.83    1.448   208.29
1759.83    1.343   209.13
1769.83    1.232   210.10
1779.83    1.111   211.29
1789.83    0.981   212.78
1799.83    0.837   214.75
1809.83    0.678   217.59
1819.83    0.499   222.36
1829.83    0.292   233.38
1839.83    0.100   298.40
1849.83    0.218    27.17
1859.83    0.240    56.12
1869.83    0.238    85.05
1879.83    0.269   111.06
1889.83    0.330   129.57
1899.83    0.406   141.74
1909.83    0.488   149.95
1919.83    0.572   155.77
1929.83    0.655   160.11
1939.83    0.738   163.46
1949.83    0.819   166.15
1959.83    0.898   168.35
1969.83    0.975   170.21
1979.83    1.050   171.79
1989.83    1.124   173.16
1999.83    1.196   174.37
2009.83    1.265   175.44
2019.83    1.333   176.41
2029.83    1.400   177.28
2039.83    1.465   178.07
2049.83    1.528   178.79
2059.83    1.589   179.46
2069.83    1.650   180.08
2079.83    1.708   180.66
2089.83    1.766   181.19
2099.83    1.822   181.70
2109.83    1.876   182.17
2119.83    1.930   182.62
2129.83    1.982   183.04
2139.83    2.033   183.45
2149.83    2.083   183.83
2159.83    2.131   184.20
2169.83    2.179   184.55
2179.83    2.225   184.88
2189.83    2.271   185.20
2199.83    2.315   185.51
2209.83    2.358   185.81
2219.83    2.400   186.09
2229.83    2.441   186.37
2239.83    2.481   186.64
2249.83    2.520   186.90
2259.83    2.559   187.15
2269.83    2.596   187.40
2279.83    2.632   187.63
2289.83    2.667   187.86
2299.83    2.702   188.09
2309.83    2.735   188.31
2319.83    2.768   188.52
2329.83    2.800   188.73
2339.83    2.831   188.94
2349.83    2.861   189.14
2359.83    2.890   189.33
2369.83    2.918   189.53
2379.83    2.946   189.71
2389.83    2.972   189.90
2399.83    2.998   190.08
2409.83    3.023   190.26
2419.83    3.047   190.44
2429.83    3.070   190.61
2439.83    3.093   190.78
2449.83    3.114   190.95
2459.83    3.135   191.12
2469.83    3.155   191.28
2479.83    3.175   191.44
2489.83    3.193   191.60
2499.83    3.211   191.76
2509.83    3.227   191.92
2519.83    3.243   192.07
2529.83    3.259   192.23
2539.83    3.273   192.38
2549.83    3.287   192.53
2559.83    3.300   192.68
2569.83    3.312   192.83
2579.83    3.323   192.98
2589.83    3.333   193.12
2599.83    3.343   193.27
2609.83    3.352   193.41
2619.83    3.360   193.56
2629.83    3.367   193.70
2639.83    3.374   193.84
2649.83    3.379   193.98
2659.83    3.384   194.13
2669.83    3.388   194.27
2679.83    3.391   194.41
2689.83    3.394   194.55
2699.83    3.395   194.69
2709.83    3.396   194.83
2719.83    3.396   194.97
2729.83    3.395   195.11
2739.83    3.393   195.25
2749.83    3.390   195.40
2759.83    3.387   195.54
2769.83    3.382   195.68
2779.83    3.377   195.82
2789.83    3.371   195.96






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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.


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Double Star Calculator: Version 1.2 ($Rev: 2397 $)
Report created: 2026-06-25 14:49:59



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