Double Star Calculator - Orbit

Orbital Elements for SWI1AB

WDS:	SWI1AB	WDS ID/Discoverer
P:	1278.752	Orbital period (years)
a:	6.74614	Semi-major axis (arcseconds)
i:	75.388	Inclination (degrees)
Ω:	178.582	Longitude of ascending node (degrees)
T:	1847.807	Epoch of periastron passage (year)
e:	0.86372	Eccentricity
ω:	90.359	Longitude of periastron (degrees)
Start-Year:	1385.6242499999998	Year
End-Year:	2664.37575	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for SWI1AB
Position:	140233.18+462023.9	Epoch-2000 right ascension and declination
WDS-ID:	14024+4620	WDS designation
Discoverer Code:	SWI1AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	68588	Hipparcos catalog number
V1:	10.05	Magnitude of the primary
V2:	10.26	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	4	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 SWI1AB

WDS 6th Orbit including measures of SWI1AB

-- 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 SWI1AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    3.745    26.37
--------------------------
1385.62    3.397   117.26
1395.62    3.418   118.66
1405.62    3.440   120.04
1415.62    3.462   121.41
1425.62    3.485   122.76
1435.62    3.507   124.09
1445.62    3.530   125.41
1455.62    3.553   126.71
1465.62    3.576   127.99
1475.62    3.599   129.26
1485.62    3.622   130.50
1495.62    3.644   131.74
1505.62    3.666   132.96
1515.62    3.687   134.16
1525.62    3.707   135.36
1535.62    3.727   136.53
1545.62    3.746   137.70
1555.62    3.763   138.86
1565.62    3.779   140.00
1575.62    3.794   141.14
1585.62    3.807   142.27
1595.62    3.818   143.39
1605.62    3.828   144.50
1615.62    3.834   145.61
1625.62    3.838   146.72
1635.62    3.839   147.82
1645.62    3.837   148.93
1655.62    3.832   150.03
1665.62    3.822   151.15
1675.62    3.807   152.27
1685.62    3.787   153.40
1695.62    3.762   154.54
1705.62    3.729   155.70
1715.62    3.689   156.88
1725.62    3.640   158.10
1735.62    3.581   159.34
1745.62    3.510   160.64
1755.62    3.425   161.99
1765.62    3.321   163.42
1775.62    3.197   164.96
1785.62    3.045   166.63
1795.62    2.857   168.50
1805.62    2.620   170.66
1815.62    2.311   173.34
1825.62    1.889   177.03
1835.62    1.267   183.64
1845.62    0.345   219.73
1855.62    0.904   347.60
1865.62    1.650   358.04
1875.62    2.138     2.59
1885.62    2.482     5.63
1895.62    2.740     8.02
1905.62    2.941    10.03
1915.62    3.102    11.82
1925.62    3.233    13.44
1935.62    3.340    14.94
1945.62    3.428    16.37
1955.62    3.502    17.72
1965.62    3.562    19.03
1975.62    3.612    20.29
1985.62    3.652    21.53
1995.62    3.684    22.74
2005.62    3.710    23.93
2015.62    3.730    25.11
2025.62    3.744    26.27
2035.62    3.754    27.43
2045.62    3.759    28.58
2055.62    3.761    29.74
2065.62    3.760    30.89
2075.62    3.756    32.04
2085.62    3.749    33.20
2095.62    3.740    34.36
2105.62    3.729    35.53
2115.62    3.716    36.70
2125.62    3.701    37.89
2135.62    3.685    39.08
2145.62    3.668    40.29
2155.62    3.650    41.50
2165.62    3.631    42.73
2175.62    3.611    43.98
2185.62    3.591    45.23
2195.62    3.570    46.50
2205.62    3.549    47.79
2215.62    3.527    49.09
2225.62    3.506    50.41
2235.62    3.484    51.74
2245.62    3.463    53.09
2255.62    3.441    54.46
2265.62    3.420    55.84
2275.62    3.400    57.24
2285.62    3.380    58.66
2295.62    3.360    60.10
2305.62    3.341    61.55
2315.62    3.323    63.01
2325.62    3.305    64.50
2335.62    3.289    66.00
2345.62    3.273    67.51
2355.62    3.258    69.04
2365.62    3.244    70.58
2375.62    3.232    72.13
2385.62    3.220    73.70
2395.62    3.209    75.27
2405.62    3.200    76.86
2415.62    3.192    78.45
2425.62    3.185    80.06
2435.62    3.180    81.66
2445.62    3.176    83.28
2455.62    3.173    84.89
2465.62    3.171    86.51
2475.62    3.171    88.13
2485.62    3.172    89.75
2495.62    3.175    91.37
2505.62    3.179    92.98
2515.62    3.184    94.59
2525.62    3.191    96.20
2535.62    3.198    97.79
2545.62    3.207    99.38
2555.62    3.218   100.96
2565.62    3.229   102.53
2575.62    3.242   104.08
2585.62    3.256   105.63
2595.62    3.271   107.16
2605.62    3.286   108.67
2615.62    3.303   110.17
2625.62    3.321   111.66
2635.62    3.340   113.13
2645.62    3.359   114.58
2655.62    3.379   116.01

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 17:01:50