Double Star Calculator - Orbit

Orbital Elements for STF1998AC
WDS: STF1998AC WDS ID/Discoverer
P: 1514.430 Orbital period (years)
a: 7.755 Semi-major axis (arcseconds)
i: 131.5 Inclination (degrees)
Ω: 47.4 Longitude of ascending node (degrees)
T: 2226.100 Epoch of periastron passage (year)
e: 0.041 Eccentricity
ω: 59.3 Longitude of periastron (degrees)
Start-Year: 1267.7849999999999 Year
End-Year: 2782.215 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1998AC
Position: 160422.13-112223.2 Epoch-2000 right ascension and declination
WDS-ID: 16044-1122 WDS designation
Discoverer Code: STF1998AC Discover designation and components
ADS number: 9909 Aitken Double Star catalog
HD number: 144069J HD catalog number
Hipparcos number: 78727 Hipparcos catalog number
V1: 5.16 Magnitude of the primary
V2: 7.30 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2005 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: Zir2008 Reference

Double Star Orbit for STF1998AC



WDS 6th Orbit including measures of STF1998AC

-- 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 STF1998AC
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    7.503    41.90
--------------------------
1267.78    7.827   217.43
1277.78    7.788   215.88
1287.78    7.743   214.31
1297.78    7.692   212.72
1307.78    7.635   211.11
1317.78    7.571   209.47
1327.78    7.503   207.80
1337.78    7.429   206.11
1347.78    7.350   204.37
1357.78    7.267   202.60
1367.78    7.180   200.79
1377.78    7.089   198.93
1387.78    6.994   197.02
1397.78    6.897   195.06
1407.78    6.798   193.04
1417.78    6.697   190.96
1427.78    6.595   188.82
1437.78    6.492   186.61
1447.78    6.390   184.32
1457.78    6.288   181.97
1467.78    6.187   179.54
1477.78    6.089   177.02
1487.78    5.993   174.43
1497.78    5.901   171.75
1507.78    5.813   168.99
1517.78    5.730   166.15
1527.78    5.653   163.23
1537.78    5.582   160.23
1547.78    5.519   157.15
1557.78    5.463   154.01
1567.78    5.415   150.81
1577.78    5.377   147.56
1587.78    5.348   144.27
1597.78    5.328   140.95
1607.78    5.318   137.60
1617.78    5.318   134.26
1627.78    5.327   130.91
1637.78    5.347   127.59
1647.78    5.376   124.30
1657.78    5.414   121.04
1667.78    5.460   117.84
1677.78    5.515   114.70
1687.78    5.578   111.62
1697.78    5.647   108.61
1707.78    5.722   105.68
1717.78    5.803   102.83
1727.78    5.888   100.06
1737.78    5.977    97.37
1747.78    6.069    94.76
1757.78    6.164    92.23
1767.78    6.260    89.78
1777.78    6.357    87.40
1787.78    6.454    85.09
1797.78    6.550    82.86
1807.78    6.645    80.68
1817.78    6.739    78.57
1827.78    6.829    76.51
1837.78    6.917    74.51
1847.78    7.002    72.55
1857.78    7.082    70.64
1867.78    7.158    68.78
1877.78    7.228    66.95
1887.78    7.294    65.15
1897.78    7.354    63.39
1907.78    7.407    61.65
1917.78    7.455    59.94
1927.78    7.495    58.24
1937.78    7.529    56.57
1947.78    7.556    54.90
1957.78    7.575    53.25
1967.78    7.587    51.60
1977.78    7.592    49.96
1987.78    7.588    48.32
1997.78    7.577    46.67
2007.78    7.559    45.02
2017.78    7.533    43.36
2027.78    7.499    41.68
2037.78    7.457    39.99
2047.78    7.408    38.28
2057.78    7.352    36.54
2067.78    7.289    34.77
2077.78    7.219    32.98
2087.78    7.143    31.14
2097.78    7.060    29.26
2107.78    6.972    27.34
2117.78    6.878    25.37
2127.78    6.780    23.34
2137.78    6.677    21.25
2147.78    6.571    19.09
2157.78    6.461    16.86
2167.78    6.349    14.55
2177.78    6.235    12.16
2187.78    6.121     9.68
2197.78    6.006     7.11
2207.78    5.892     4.43
2217.78    5.780     1.66
2227.78    5.671   358.77
2237.78    5.566   355.77
2247.78    5.466   352.66
2257.78    5.372   349.43
2267.78    5.285   346.10
2277.78    5.206   342.66
2287.78    5.137   339.12
2297.78    5.077   335.49
2307.78    5.029   331.78
2317.78    4.992   328.01
2327.78    4.967   324.19
2337.78    4.956   320.34
2347.78    4.957   316.49
2357.78    4.971   312.64
2367.78    4.997   308.83
2377.78    5.036   305.07
2387.78    5.087   301.37
2397.78    5.149   297.76
2407.78    5.221   294.24
2417.78    5.302   290.82
2427.78    5.392   287.51
2437.78    5.489   284.31
2447.78    5.593   281.22
2457.78    5.702   278.26
2467.78    5.814   275.40
2477.78    5.931   272.66
2487.78    6.049   270.02
2497.78    6.169   267.48
2507.78    6.289   265.04
2517.78    6.409   262.69
2527.78    6.528   260.43
2537.78    6.645   258.25
2547.78    6.759   256.14
2557.78    6.871   254.10
2567.78    6.979   252.13
2577.78    7.082   250.21
2587.78    7.181   248.35
2597.78    7.275   246.54
2607.78    7.364   244.78
2617.78    7.447   243.05
2627.78    7.524   241.36
2637.78    7.594   239.70
2647.78    7.658   238.08
2657.78    7.715   236.48
2667.78    7.765   234.90
2677.78    7.808   233.34
2687.78    7.844   231.79
2697.78    7.873   230.26
2707.78    7.895   228.74
2717.78    7.909   227.22
2727.78    7.916   225.71
2737.78    7.915   224.20
2747.78    7.907   222.69
2757.78    7.893   221.17
2767.78    7.871   219.65
2777.78    7.842   218.11






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 17:22:03



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