Double Star Calculator - Orbit

Orbital Elements for STF13

WDS:	STF13	WDS ID/Discoverer
P:	1245.600	Orbital period (years)
a:	1.078	Semi-major axis (arcseconds)
i:	140.7	Inclination (degrees)
Ω:	86.1	Longitude of ascending node (degrees)
T:	3048.600	Epoch of periastron passage (year)
e:	0.472	Eccentricity
ω:	287.6	Longitude of periastron (degrees)
Start-Year:	1402.2	Year
End-Year:	2647.8	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF13
Position:	001614.02+765703.0	Epoch-2000 right ascension and declination
WDS-ID:	00162+7657	WDS designation
Discoverer Code:	STF13	Discover designation and components
ADS number:	207	Aitken Double Star catalog
HD number:	1141	HD catalog number
Hipparcos number:	1296	Hipparcos catalog number
V1:	7.03	Magnitude of the primary
V2:	7.12	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2016	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Msn2017c	Reference

Double Star Orbit for STF13

WDS 6th Orbit including measures of STF13

-- 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 STF13

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.967    46.23
--------------------------
1402.20    1.288   303.37
1412.20    1.284   301.98
1422.20    1.278   300.58
1432.20    1.273   299.18
1442.20    1.266   297.75
1452.20    1.259   296.32
1462.20    1.251   294.86
1472.20    1.242   293.39
1482.20    1.232   291.89
1492.20    1.221   290.37
1502.20    1.210   288.82
1512.20    1.197   287.23
1522.20    1.183   285.62
1532.20    1.169   283.96
1542.20    1.153   282.26
1552.20    1.136   280.51
1562.20    1.118   278.71
1572.20    1.098   276.84
1582.20    1.077   274.90
1592.20    1.055   272.89
1602.20    1.031   270.78
1612.20    1.006   268.57
1622.20    0.979   266.25
1632.20    0.951   263.78
1642.20    0.920   261.17
1652.20    0.889   258.37
1662.20    0.855   255.35
1672.20    0.820   252.08
1682.20    0.783   248.52
1692.20    0.745   244.59
1702.20    0.706   240.24
1712.20    0.666   235.36
1722.20    0.625   229.86
1732.20    0.586   223.60
1742.20    0.548   216.46
1752.20    0.513   208.30
1762.20    0.484   199.05
1772.20    0.461   188.76
1782.20    0.448   177.64
1792.20    0.445   166.11
1802.20    0.453   154.70
1812.20    0.470   143.89
1822.20    0.494   133.99
1832.20    0.523   125.10
1842.20    0.555   117.21
1852.20    0.589   110.21
1862.20    0.623   103.96
1872.20    0.656    98.36
1882.20    0.687    93.27
1892.20    0.717    88.62
1902.20    0.745    84.33
1912.20    0.771    80.34
1922.20    0.795    76.60
1932.20    0.817    73.08
1942.20    0.838    69.74
1952.20    0.858    66.55
1962.20    0.876    63.50
1972.20    0.893    60.57
1982.20    0.908    57.75
1992.20    0.923    55.01
2002.20    0.937    52.36
2012.20    0.950    49.79
2022.20    0.962    47.28
2032.20    0.974    44.84
2042.20    0.985    42.45
2052.20    0.996    40.12
2062.20    1.006    37.83
2072.20    1.016    35.59
2082.20    1.025    33.39
2092.20    1.034    31.22
2102.20    1.043    29.10
2112.20    1.052    27.01
2122.20    1.060    24.96
2132.20    1.069    22.94
2142.20    1.077    20.95
2152.20    1.085    18.99
2162.20    1.093    17.05
2172.20    1.100    15.15
2182.20    1.108    13.27
2192.20    1.116    11.42
2202.20    1.123     9.59
2212.20    1.130     7.78
2222.20    1.138     6.00
2232.20    1.145     4.24
2242.20    1.152     2.51
2252.20    1.159     0.79
2262.20    1.166   359.09
2272.20    1.173   357.42
2282.20    1.180   355.77
2292.20    1.187   354.13
2302.20    1.193   352.51
2312.20    1.200   350.91
2322.20    1.206   349.33
2332.20    1.213   347.76
2342.20    1.219   346.21
2352.20    1.225   344.68
2362.20    1.231   343.16
2372.20    1.237   341.65
2382.20    1.242   340.16
2392.20    1.248   338.69
2402.20    1.253   337.22
2412.20    1.258   335.77
2422.20    1.263   334.33
2432.20    1.268   332.90
2442.20    1.272   331.48
2452.20    1.277   330.07
2462.20    1.281   328.66
2472.20    1.284   327.27
2482.20    1.288   325.89
2492.20    1.291   324.51
2502.20    1.294   323.13
2512.20    1.296   321.77
2522.20    1.298   320.41
2532.20    1.300   319.05
2542.20    1.301   317.70
2552.20    1.302   316.34
2562.20    1.303   314.99
2572.20    1.303   313.64
2582.20    1.303   312.30
2592.20    1.302   310.94
2602.20    1.301   309.59
2612.20    1.299   308.24
2622.20    1.297   306.88
2632.20    1.294   305.51
2642.20    1.290   304.14

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 14:37:44