Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:17:37

Orbital Elements for I43AB

WDS:	I43AB	WDS ID/Discoverer
P:	1637.700	Orbital period (years)
a:	2.762	Semi-major axis (arcseconds)
i:	95.6	Inclination (degrees)
Ω:	172.8	Longitude of ascending node (degrees)
T:	2187.800	Epoch of periastron passage (year)
e:	0.487	Eccentricity
ω:	13.9	Longitude of periastron (degrees)
Start-Year:	1207.0	Year
End-Year:	2843.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I43AB

Position:	001038.56-731327.7	Epoch-2000 right ascension and declination
WDS-ID:	00106-7313	WDS designation
Discoverer Code:	I43AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	661	HD catalog number
Hipparcos number:	865	Hipparcos catalog number
V1:	6.97	Magnitude of the primary
V2:	8.55	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1996	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for I43AB

WDS 6th Orbit including measures of I43AB

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

Ephemeris of I43AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.574    192.9
-------------------------
1207.0     3.989    352.8
1217.0     4.003    352.8
1227.0     4.015    352.7
1237.0     4.026    352.6
1247.0     4.034    352.5
1257.0     4.041    352.4
1267.0     4.045    352.3
1277.0     4.048    352.2
1287.0     4.049    352.1
1297.0     4.048    352.1
1307.0     4.045    352.0
1317.0     4.041    351.9
1327.0     4.034    351.8
1337.0     4.026    351.7
1347.0     4.016    351.6
1357.0     4.004    351.5
1367.0     3.991    351.4
1377.0     3.975    351.3
1387.0     3.958    351.3
1397.0     3.939    351.2
1407.0     3.919    351.1
1417.0     3.896    351.0
1427.0     3.872    350.9
1437.0     3.846    350.8
1447.0     3.819    350.7
1457.0     3.789    350.6
1467.0     3.758    350.5
1477.0     3.726    350.4
1487.0     3.691    350.3
1497.0     3.655    350.2
1507.0     3.617    350.1
1517.0     3.577    350.0
1527.0     3.536    349.8
1537.0     3.493    349.7
1547.0     3.448    349.6
1557.0     3.401    349.5
1567.0     3.353    349.4
1577.0     3.303    349.2
1587.0     3.252    349.1
1597.0     3.199    349.0
1607.0     3.144    348.8
1617.0     3.087    348.7
1627.0     3.029    348.5
1637.0     2.969    348.4
1647.0     2.907    348.2
1657.0     2.844    348.0
1667.0     2.778    347.8
1677.0     2.712    347.7
1687.0     2.643    347.5
1697.0     2.573    347.2
1707.0     2.502    347.0
1717.0     2.428    346.8
1727.0     2.353    346.5
1737.0     2.277    346.3
1747.0     2.199    346.0
1757.0     2.119    345.7
1767.0     2.037    345.3
1777.0     1.955    345.0
1787.0     1.870    344.6
1797.0     1.784    344.2
1807.0     1.697    343.7
1817.0     1.608    343.2
1827.0     1.517    342.6
1837.0     1.426    341.9
1847.0     1.333    341.2
1857.0     1.239    340.3
1867.0     1.143    339.3
1877.0     1.047    338.1
1887.0     0.950    336.7
1897.0     0.853    334.9
1907.0     0.755    332.7
1917.0     0.658    329.8
1927.0     0.561    325.9
1937.0     0.468    320.5
1947.0     0.380    312.4
1957.0     0.303    299.9
1967.0     0.249    280.6
1977.0     0.233    255.1
1987.0     0.264    231.2
1997.0     0.328    214.5
2007.0     0.410    203.9
2017.0     0.499    196.9
2027.0     0.593    192.0
2037.0     0.687    188.5
2047.0     0.780    185.8
2057.0     0.872    183.7
2067.0     0.961    182.0
2077.0     1.045    180.6
2087.0     1.125    179.4
2097.0     1.198    178.3
2107.0     1.264    177.4
2117.0     1.321    176.5
2127.0     1.368    175.8
2137.0     1.404    175.0
2147.0     1.427    174.3
2157.0     1.437    173.6
2167.0     1.433    172.9
2177.0     1.413    172.2
2187.0     1.379    171.5
2197.0     1.330    170.7
2207.0     1.267    169.9
2217.0     1.191    168.9
2227.0     1.103    167.8
2237.0     1.005    166.5
2247.0     0.898    164.9
2257.0     0.784    162.9
2267.0     0.666    160.2
2277.0     0.545    156.2
2287.0     0.424    150.1
2297.0     0.310    139.1
2307.0     0.217    117.4
2317.0     0.185     78.9
2327.0     0.240     44.9
2337.0     0.343     27.3
2347.0     0.461     18.2
2357.0     0.584     12.9
2367.0     0.709      9.4
2377.0     0.833      7.0
2387.0     0.956      5.2
2397.0     1.077      3.8
2407.0     1.197      2.7
2417.0     1.314      1.8
2427.0     1.429      1.0
2437.0     1.541      0.4
2447.0     1.651    359.8
2457.0     1.757    359.3
2467.0     1.862    358.9
2477.0     1.963    358.5
2487.0     2.062    358.2
2497.0     2.158    357.8
2507.0     2.252    357.5
2517.0     2.343    357.3
2527.0     2.431    357.0
2537.0     2.516    356.8
2547.0     2.599    356.6
2557.0     2.680    356.4
2567.0     2.757    356.2
2577.0     2.832    356.0
2587.0     2.905    355.8
2597.0     2.975    355.6
2607.0     3.043    355.5
2617.0     3.108    355.3
2627.0     3.171    355.2
2637.0     3.231    355.1
2647.0     3.290    354.9
2657.0     3.345    354.8
2667.0     3.399    354.7
2677.0     3.450    354.5
2687.0     3.499    354.4
2697.0     3.546    354.3
2707.0     3.590    354.2
2717.0     3.632    354.1
2727.0     3.673    354.0
2737.0     3.711    353.9
2747.0     3.746    353.8
2757.0     3.780    353.7
2767.0     3.812    353.6
2777.0     3.841    353.5
2787.0     3.869    353.4
2797.0     3.895    353.3
2807.0     3.918    353.2
2817.0     3.940    353.1
2827.0     3.959    353.0
2837.0     3.977    352.9

Disclaimer

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.