Double Star Calculator - Orbit

Orbital Elements for I1198

WDS:	I1198	WDS ID/Discoverer
P:	1600.000	Orbital period (years)
a:	1.4	Semi-major axis (arcseconds)
i:	82.0	Inclination (degrees)
Ω:	123.14	Longitude of ascending node (degrees)
T:	1920.000	Epoch of periastron passage (year)
e:	0.25	Eccentricity
ω:	160.0	Longitude of periastron (degrees)
Start-Year:	1225.0	Year
End-Year:	2825.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I1198
Position:	101739.50-345153.4	Epoch-2000 right ascension and declination
WDS-ID:	10177-3452	WDS designation
Discoverer Code:	I1198	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.56	Magnitude of the primary
V2:	13.13	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	VSP2022b	Reference

Double Star Orbit for I1198

WDS 6th Orbit including measures of I1198

-- 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 I1198

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.037   306.03
--------------------------
1225.00    1.724   122.41
1235.00    1.723   122.61
1245.00    1.722   122.81
1255.00    1.718   123.01
1265.00    1.714   123.21
1275.00    1.708   123.41
1285.00    1.700   123.62
1295.00    1.691   123.82
1305.00    1.681   124.03
1315.00    1.669   124.24
1325.00    1.656   124.46
1335.00    1.641   124.68
1345.00    1.625   124.90
1355.00    1.607   125.13
1365.00    1.588   125.36
1375.00    1.568   125.60
1385.00    1.546   125.85
1395.00    1.522   126.10
1405.00    1.497   126.36
1415.00    1.470   126.63
1425.00    1.442   126.91
1435.00    1.413   127.20
1445.00    1.382   127.50
1455.00    1.350   127.82
1465.00    1.316   128.16
1475.00    1.280   128.51
1485.00    1.244   128.88
1495.00    1.205   129.28
1505.00    1.166   129.70
1515.00    1.125   130.16
1525.00    1.083   130.64
1535.00    1.039   131.17
1545.00    0.994   131.75
1555.00    0.948   132.38
1565.00    0.900   133.07
1575.00    0.852   133.85
1585.00    0.802   134.72
1595.00    0.751   135.71
1605.00    0.699   136.84
1615.00    0.647   138.15
1625.00    0.594   139.70
1635.00    0.540   141.55
1645.00    0.486   143.81
1655.00    0.432   146.65
1665.00    0.378   150.28
1675.00    0.326   155.10
1685.00    0.277   161.70
1695.00    0.232   171.02
1705.00    0.195   184.31
1715.00    0.172   202.31
1725.00    0.170   223.05
1735.00    0.188   241.95
1745.00    0.223   256.27
1755.00    0.266   266.35
1765.00    0.315   273.46
1775.00    0.366   278.63
1785.00    0.419   282.51
1795.00    0.471   285.52
1805.00    0.524   287.93
1815.00    0.575   289.90
1825.00    0.625   291.55
1835.00    0.674   292.96
1845.00    0.721   294.18
1855.00    0.766   295.25
1865.00    0.808   296.22
1875.00    0.847   297.08
1885.00    0.884   297.88
1895.00    0.918   298.61
1905.00    0.948   299.29
1915.00    0.976   299.93
1925.00    0.999   300.54
1935.00    1.020   301.12
1945.00    1.036   301.69
1955.00    1.049   302.23
1965.00    1.058   302.77
1975.00    1.064   303.29
1985.00    1.066   303.82
1995.00    1.064   304.34
2005.00    1.059   304.87
2015.00    1.051   305.40
2025.00    1.039   305.95
2035.00    1.024   306.50
2045.00    1.005   307.08
2055.00    0.984   307.68
2065.00    0.960   308.31
2075.00    0.934   308.97
2085.00    0.905   309.67
2095.00    0.874   310.43
2105.00    0.840   311.23
2115.00    0.805   312.11
2125.00    0.768   313.07
2135.00    0.730   314.13
2145.00    0.690   315.31
2155.00    0.648   316.64
2165.00    0.606   318.15
2175.00    0.563   319.89
2185.00    0.520   321.92
2195.00    0.476   324.32
2205.00    0.433   327.20
2215.00    0.390   330.73
2225.00    0.348   335.11
2235.00    0.308   340.66
2245.00    0.271   347.79
2255.00    0.240   356.95
2265.00    0.216     8.51
2275.00    0.202    22.28
2285.00    0.201    37.10
2295.00    0.212    51.19
2305.00    0.235    63.19
2315.00    0.265    72.78
2325.00    0.301    80.23
2335.00    0.341    86.02
2345.00    0.383    90.58
2355.00    0.426    94.23
2365.00    0.470    97.19
2375.00    0.515    99.64
2385.00    0.560   101.70
2395.00    0.605   103.46
2405.00    0.650   104.97
2415.00    0.694   106.28
2425.00    0.739   107.44
2435.00    0.782   108.47
2445.00    0.825   109.39
2455.00    0.868   110.22
2465.00    0.909   110.97
2475.00    0.950   111.66
2485.00    0.991   112.29
2495.00    1.030   112.87
2505.00    1.069   113.41
2515.00    1.106   113.92
2525.00    1.143   114.39
2535.00    1.179   114.83
2545.00    1.214   115.24
2555.00    1.248   115.64
2565.00    1.281   116.01
2575.00    1.312   116.36
2585.00    1.343   116.70
2595.00    1.373   117.02
2605.00    1.401   117.33
2615.00    1.429   117.63
2625.00    1.455   117.91
2635.00    1.481   118.19
2645.00    1.505   118.45
2655.00    1.527   118.71
2665.00    1.549   118.96
2675.00    1.570   119.21
2685.00    1.589   119.45
2695.00    1.607   119.68
2705.00    1.624   119.91
2715.00    1.639   120.13
2725.00    1.654   120.35
2735.00    1.667   120.56
2745.00    1.678   120.78
2755.00    1.689   120.99
2765.00    1.698   121.19
2775.00    1.705   121.40
2785.00    1.712   121.60
2795.00    1.717   121.81
2805.00    1.721   122.01
2815.00    1.723   122.21

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 16:26:11