Double Star Calculator - Orbit

Orbital Elements for STF1816

WDS:	STF1816	WDS ID/Discoverer
P:	1340.000	Orbital period (years)
a:	1.642	Semi-major axis (arcseconds)
i:	81.7	Inclination (degrees)
Ω:	80.2	Longitude of ascending node (degrees)
T:	2079.000	Epoch of periastron passage (year)
e:	0.54	Eccentricity
ω:	125.3	Longitude of periastron (degrees)
Start-Year:	1355.0	Year
End-Year:	2695.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1816
Position:	141354.63+290619.5	Epoch-2000 right ascension and declination
WDS-ID:	14139+2906	WDS designation
Discoverer Code:	STF1816	Discover designation and components
ADS number:	9174	Aitken Double Star catalog
HD number:	124587	HD catalog number
Hipparcos number:	69523	Hipparcos catalog number
V1:	7.43	Magnitude of the primary
V2:	7.75	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2011	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Zir2014a	Reference

Double Star Orbit for STF1816

WDS 6th Orbit including measures of STF1816

-- 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 STF1816

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.264   107.44
--------------------------
1355.00    1.302    66.24
1365.00    1.339    66.74
1375.00    1.375    67.22
1385.00    1.410    67.67
1395.00    1.444    68.10
1405.00    1.478    68.52
1415.00    1.511    68.91
1425.00    1.543    69.29
1435.00    1.574    69.65
1445.00    1.604    70.00
1455.00    1.634    70.33
1465.00    1.662    70.66
1475.00    1.690    70.97
1485.00    1.716    71.28
1495.00    1.741    71.57
1505.00    1.766    71.86
1515.00    1.789    72.13
1525.00    1.811    72.41
1535.00    1.833    72.67
1545.00    1.852    72.93
1555.00    1.871    73.18
1565.00    1.889    73.43
1575.00    1.905    73.68
1585.00    1.920    73.92
1595.00    1.934    74.16
1605.00    1.946    74.39
1615.00    1.957    74.62
1625.00    1.967    74.85
1635.00    1.975    75.08
1645.00    1.981    75.30
1655.00    1.986    75.52
1665.00    1.989    75.75
1675.00    1.991    75.97
1685.00    1.991    76.19
1695.00    1.989    76.41
1705.00    1.986    76.64
1715.00    1.980    76.86
1725.00    1.973    77.08
1735.00    1.963    77.31
1745.00    1.952    77.54
1755.00    1.938    77.77
1765.00    1.922    78.01
1775.00    1.903    78.25
1785.00    1.882    78.50
1795.00    1.859    78.75
1805.00    1.833    79.01
1815.00    1.804    79.27
1825.00    1.772    79.55
1835.00    1.738    79.83
1845.00    1.700    80.13
1855.00    1.659    80.44
1865.00    1.614    80.77
1875.00    1.565    81.12
1885.00    1.513    81.49
1895.00    1.457    81.89
1905.00    1.396    82.32
1915.00    1.331    82.80
1925.00    1.262    83.32
1935.00    1.187    83.91
1945.00    1.108    84.58
1955.00    1.022    85.35
1965.00    0.932    86.27
1975.00    0.836    87.40
1985.00    0.734    88.84
1995.00    0.626    90.75
2005.00    0.514    93.48
2015.00    0.398    97.78
2025.00    0.281   105.66
2035.00    0.172   124.12
2045.00    0.117   173.84
2055.00    0.178   221.53
2065.00    0.286   239.04
2075.00    0.401   246.71
2085.00    0.510   251.00
2095.00    0.610   253.82
2105.00    0.698   255.88
2115.00    0.772   257.50
2125.00    0.834   258.87
2135.00    0.882   260.06
2145.00    0.917   261.15
2155.00    0.942   262.16
2165.00    0.957   263.14
2175.00    0.964   264.09
2185.00    0.962   265.04
2195.00    0.955   266.00
2205.00    0.941   266.97
2215.00    0.923   267.99
2225.00    0.900   269.04
2235.00    0.874   270.16
2245.00    0.845   271.35
2255.00    0.813   272.63
2265.00    0.779   274.02
2275.00    0.744   275.54
2285.00    0.707   277.21
2295.00    0.668   279.07
2305.00    0.630   281.17
2315.00    0.590   283.53
2325.00    0.551   286.24
2335.00    0.512   289.36
2345.00    0.474   292.99
2355.00    0.438   297.23
2365.00    0.403   302.22
2375.00    0.372   308.10
2385.00    0.345   314.98
2395.00    0.323   322.91
2405.00    0.308   331.81
2415.00    0.300   341.39
2425.00    0.301   351.20
2435.00    0.310     0.69
2445.00    0.326     9.42
2455.00    0.349    17.16
2465.00    0.378    23.84
2475.00    0.410    29.53
2485.00    0.446    34.35
2495.00    0.483    38.44
2505.00    0.523    41.93
2515.00    0.563    44.92
2525.00    0.605    47.51
2535.00    0.647    49.76
2545.00    0.689    51.73
2555.00    0.732    53.48
2565.00    0.775    55.03
2575.00    0.817    56.42
2585.00    0.860    57.67
2595.00    0.902    58.80
2605.00    0.944    59.84
2615.00    0.986    60.78
2625.00    1.027    61.65
2635.00    1.068    62.45
2645.00    1.109    63.19
2655.00    1.149    63.88
2665.00    1.188    64.53
2675.00    1.227    65.13
2685.00    1.265    65.70

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 17:03:52