Double Star Calculator - Orbit

Orbital Elements for STF1313

WDS:	STF1313	WDS ID/Discoverer
P:	1469.081	Orbital period (years)
a:	2.26673	Semi-major axis (arcseconds)
i:	69.023	Inclination (degrees)
Ω:	44.469	Longitude of ascending node (degrees)
T:	1787.434	Epoch of periastron passage (year)
e:	0.83071	Eccentricity
ω:	105.193	Longitude of periastron (degrees)
Start-Year:	1290.45965	Year
End-Year:	2759.54035	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1313
Position:	091345.13+695847.4	Epoch-2000 right ascension and declination
WDS-ID:	09137+6959	WDS designation
Discoverer Code:	STF1313	Discover designation and components
ADS number:	7229	Aitken Double Star catalog
HD number:	78696	HD catalog number
Hipparcos number:	45284	Hipparcos catalog number
V1:	9.39	Magnitude of the primary
V2:	9.55	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	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:	Izm2019	Reference

Double Star Orbit for STF1313

WDS 6th Orbit including measures of STF1313

-- 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 STF1313

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.101   285.43
--------------------------
1290.46    2.068     7.39
1300.46    2.074     7.98
1310.46    2.079     8.56
1320.46    2.084     9.14
1330.46    2.088     9.72
1340.46    2.092    10.29
1350.46    2.095    10.86
1360.46    2.097    11.43
1370.46    2.098    12.01
1380.46    2.099    12.57
1390.46    2.099    13.14
1400.46    2.098    13.71
1410.46    2.097    14.28
1420.46    2.094    14.86
1430.46    2.091    15.43
1440.46    2.086    16.00
1450.46    2.081    16.58
1460.46    2.075    17.16
1470.46    2.067    17.75
1480.46    2.058    18.34
1490.46    2.049    18.93
1500.46    2.037    19.53
1510.46    2.025    20.14
1520.46    2.011    20.76
1530.46    1.996    21.38
1540.46    1.979    22.02
1550.46    1.960    22.67
1560.46    1.940    23.33
1570.46    1.917    24.00
1580.46    1.893    24.69
1590.46    1.866    25.40
1600.46    1.837    26.13
1610.46    1.805    26.89
1620.46    1.771    27.67
1630.46    1.733    28.49
1640.46    1.692    29.35
1650.46    1.647    30.25
1660.46    1.598    31.20
1670.46    1.544    32.22
1680.46    1.485    33.31
1690.46    1.419    34.50
1700.46    1.346    35.81
1710.46    1.264    37.29
1720.46    1.171    38.98
1730.46    1.066    40.99
1740.46    0.944    43.47
1750.46    0.800    46.78
1760.46    0.627    51.75
1770.46    0.416    61.26
1780.46    0.183    94.92
1790.46    0.227   192.11
1800.46    0.444   216.62
1810.46    0.602   225.83
1820.46    0.711   231.63
1830.46    0.788   236.09
1840.46    0.844   239.85
1850.46    0.887   243.19
1860.46    0.921   246.26
1870.46    0.947   249.13
1880.46    0.969   251.86
1890.46    0.986   254.48
1900.46    1.001   257.02
1910.46    1.013   259.50
1920.46    1.024   261.91
1930.46    1.033   264.29
1940.46    1.042   266.62
1950.46    1.049   268.91
1960.46    1.056   271.18
1970.46    1.063   273.41
1980.46    1.070   275.62
1990.46    1.076   277.80
2000.46    1.083   279.95
2010.46    1.090   282.07
2020.46    1.097   284.17
2030.46    1.104   286.24
2040.46    1.112   288.29
2050.46    1.120   290.30
2060.46    1.128   292.29
2070.46    1.137   294.24
2080.46    1.146   296.17
2090.46    1.156   298.06
2100.46    1.166   299.92
2110.46    1.176   301.75
2120.46    1.187   303.55
2130.46    1.199   305.31
2140.46    1.210   307.04
2150.46    1.222   308.74
2160.46    1.235   310.40
2170.46    1.248   312.03
2180.46    1.261   313.63
2190.46    1.274   315.19
2200.46    1.288   316.72
2210.46    1.302   318.21
2220.46    1.317   319.68
2230.46    1.332   321.11
2240.46    1.347   322.51
2250.46    1.362   323.87
2260.46    1.377   325.21
2270.46    1.393   326.52
2280.46    1.409   327.80
2290.46    1.425   329.05
2300.46    1.441   330.27
2310.46    1.457   331.47
2320.46    1.474   332.63
2330.46    1.490   333.78
2340.46    1.506   334.90
2350.46    1.523   335.99
2360.46    1.540   337.06
2370.46    1.556   338.11
2380.46    1.573   339.13
2390.46    1.589   340.14
2400.46    1.606   341.12
2410.46    1.622   342.08
2420.46    1.639   343.03
2430.46    1.655   343.95
2440.46    1.672   344.86
2450.46    1.688   345.75
2460.46    1.704   346.62
2470.46    1.720   347.48
2480.46    1.736   348.32
2490.46    1.751   349.14
2500.46    1.767   349.95
2510.46    1.782   350.75
2520.46    1.797   351.53
2530.46    1.812   352.30
2540.46    1.827   353.06
2550.46    1.841   353.81
2560.46    1.855   354.54
2570.46    1.869   355.27
2580.46    1.883   355.98
2590.46    1.897   356.68
2600.46    1.910   357.37
2610.46    1.923   358.06
2620.46    1.935   358.73
2630.46    1.947   359.40
2640.46    1.959     0.06
2650.46    1.970     0.71
2660.46    1.982     1.35
2670.46    1.992     1.98
2680.46    2.003     2.61
2690.46    2.012     3.24
2700.46    2.022     3.85
2710.46    2.031     4.46
2720.46    2.039     5.07
2730.46    2.047     5.67
2740.46    2.055     6.27
2750.46    2.062     6.86

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 16:15:32