Double Star Calculator - Orbit

Orbital Elements for STF2402

WDS:	STF2402	WDS ID/Discoverer
P:	1191.271	Orbital period (years)
a:	3.57411	Semi-major axis (arcseconds)
i:	88.795	Inclination (degrees)
Ω:	29.807	Longitude of ascending node (degrees)
T:	2095.765	Epoch of periastron passage (year)
e:	0.82238	Eccentricity
ω:	256.362	Longitude of periastron (degrees)
Start-Year:	1429.3643499999998	Year
End-Year:	2620.63565	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2402
Position:	184944.14+104035.4	Epoch-2000 right ascension and declination
WDS-ID:	18497+1041	WDS designation
Discoverer Code:	STF2402	Discover designation and components
ADS number:	11722	Aitken Double Star catalog
HD number:	174348	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.94	Magnitude of the primary
V2:	9.27	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 STF2402

WDS 6th Orbit including measures of STF2402

-- 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 STF2402

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.450   208.40
--------------------------
1429.36    1.926    33.66
1439.36    1.874    33.79
1449.36    1.821    33.93
1459.36    1.768    34.07
1469.36    1.713    34.22
1479.36    1.658    34.39
1489.36    1.602    34.56
1499.36    1.546    34.75
1509.36    1.489    34.95
1519.36    1.431    35.16
1529.36    1.372    35.40
1539.36    1.313    35.66
1549.36    1.253    35.94
1559.36    1.193    36.24
1569.36    1.132    36.59
1579.36    1.071    36.97
1589.36    1.009    37.39
1599.36    0.947    37.88
1609.36    0.884    38.43
1619.36    0.822    39.07
1629.36    0.758    39.81
1639.36    0.695    40.68
1649.36    0.631    41.74
1659.36    0.568    43.02
1669.36    0.504    44.64
1679.36    0.441    46.72
1689.36    0.378    49.49
1699.36    0.316    53.36
1709.36    0.256    59.07
1719.36    0.200    68.11
1729.36    0.153    83.39
1739.36    0.124   108.57
1749.36    0.128   139.21
1759.36    0.161   162.30
1769.36    0.211   176.02
1779.36    0.268   184.22
1789.36    0.328   189.48
1799.36    0.390   193.09
1809.36    0.453   195.71
1819.36    0.516   197.68
1829.36    0.579   199.23
1839.36    0.642   200.47
1849.36    0.704   201.50
1859.36    0.766   202.35
1869.36    0.827   203.08
1879.36    0.887   203.71
1889.36    0.946   204.26
1899.36    1.004   204.75
1909.36    1.060   205.18
1919.36    1.115   205.57
1929.36    1.167   205.92
1939.36    1.217   206.25
1949.36    1.265   206.55
1959.36    1.309   206.83
1969.36    1.349   207.09
1979.36    1.384   207.34
1989.36    1.414   207.57
1999.36    1.437   207.80
2009.36    1.452   208.02
2019.36    1.456   208.24
2029.36    1.446   208.46
2039.36    1.418   208.68
2049.36    1.365   208.92
2059.36    1.276   209.18
2069.36    1.131   209.50
2079.36    0.893   209.95
2089.36    0.499   210.94
2099.36    0.065    17.80
2109.36    0.614    28.71
2119.36    1.038    29.42
2129.36    1.360    29.74
2139.36    1.612    29.95
2149.36    1.816    30.11
2159.36    1.984    30.24
2169.36    2.126    30.35
2179.36    2.245    30.44
2189.36    2.348    30.53
2199.36    2.435    30.61
2209.36    2.510    30.69
2219.36    2.575    30.76
2229.36    2.630    30.83
2239.36    2.677    30.89
2249.36    2.717    30.95
2259.36    2.750    31.02
2269.36    2.777    31.08
2279.36    2.799    31.14
2289.36    2.816    31.19
2299.36    2.829    31.25
2309.36    2.837    31.31
2319.36    2.841    31.37
2329.36    2.842    31.42
2339.36    2.840    31.48
2349.36    2.834    31.54
2359.36    2.826    31.60
2369.36    2.814    31.65
2379.36    2.800    31.71
2389.36    2.784    31.77
2399.36    2.765    31.83
2409.36    2.744    31.89
2419.36    2.721    31.96
2429.36    2.696    32.02
2439.36    2.669    32.08
2449.36    2.640    32.15
2459.36    2.609    32.22
2469.36    2.577    32.28
2479.36    2.543    32.35
2489.36    2.508    32.43
2499.36    2.471    32.50
2509.36    2.433    32.58
2519.36    2.393    32.66
2529.36    2.352    32.74
2539.36    2.310    32.82
2549.36    2.266    32.91
2559.36    2.222    33.00
2569.36    2.176    33.10
2579.36    2.129    33.20
2589.36    2.082    33.30
2599.36    2.033    33.41
2609.36    1.983    33.53
2619.36    1.932    33.65

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 17:56:04