Double Star Calculator - Orbit

Orbital Elements for STT395

WDS:	STT395	WDS ID/Discoverer
P:	1201.000	Orbital period (years)
a:	2.687	Semi-major axis (arcseconds)
i:	79.0	Inclination (degrees)
Ω:	84.5	Longitude of ascending node (degrees)
T:	1863.700	Epoch of periastron passage (year)
e:	0.932	Eccentricity
ω:	276.5	Longitude of periastron (degrees)
Start-Year:	1424.5	Year
End-Year:	2625.5	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT395
Position:	200201.45+245616.8	Epoch-2000 right ascension and declination
WDS-ID:	20020+2456	WDS designation
Discoverer Code:	STT395	Discover designation and components
ADS number:	13277	Aitken Double Star catalog
HD number:	190004	HD catalog number
Hipparcos number:	98636	Hipparcos catalog number
V1:	5.83	Magnitude of the primary
V2:	6.19	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	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:	Zir2013a	Reference

Double Star Orbit for STT395

WDS 6th Orbit including measures of STT395

-- 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 STT395

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.849   128.90
--------------------------
1424.50    1.344   220.94
1434.50    1.354   221.77
1444.50    1.364   222.58
1454.50    1.374   223.37
1464.50    1.383   224.16
1474.50    1.392   224.94
1484.50    1.401   225.71
1494.50    1.409   226.46
1504.50    1.417   227.21
1514.50    1.424   227.95
1524.50    1.431   228.69
1534.50    1.437   229.42
1544.50    1.442   230.14
1554.50    1.447   230.86
1564.50    1.451   231.57
1574.50    1.454   232.28
1584.50    1.457   232.99
1594.50    1.458   233.69
1604.50    1.459   234.39
1614.50    1.459   235.10
1624.50    1.458   235.80
1634.50    1.456   236.51
1644.50    1.452   237.21
1654.50    1.447   237.93
1664.50    1.441   238.64
1674.50    1.434   239.37
1684.50    1.424   240.10
1694.50    1.413   240.84
1704.50    1.400   241.60
1714.50    1.385   242.37
1724.50    1.367   243.16
1734.50    1.347   243.97
1744.50    1.324   244.81
1754.50    1.297   245.68
1764.50    1.266   246.60
1774.50    1.230   247.56
1784.50    1.189   248.58
1794.50    1.141   249.68
1804.50    1.084   250.89
1814.50    1.016   252.25
1824.50    0.932   253.82
1834.50    0.826   255.75
1844.50    0.681   258.39
1854.50    0.452   263.06
1864.50    0.086    62.23
1874.50    0.462    89.79
1884.50    0.599    95.04
1894.50    0.676    98.70
1904.50    0.726   101.73
1914.50    0.761   104.43
1924.50    0.787   106.92
1934.50    0.805   109.29
1944.50    0.819   111.56
1954.50    0.829   113.76
1964.50    0.836   115.92
1974.50    0.841   118.05
1984.50    0.845   120.16
1994.50    0.847   122.25
2004.50    0.848   124.33
2014.50    0.849   126.41
2024.50    0.849   128.49
2034.50    0.849   130.56
2044.50    0.849   132.64
2054.50    0.849   134.71
2064.50    0.848   136.79
2074.50    0.848   138.88
2084.50    0.848   140.96
2094.50    0.848   143.04
2104.50    0.849   145.12
2114.50    0.850   147.19
2124.50    0.851   149.26
2134.50    0.853   151.33
2144.50    0.855   153.38
2154.50    0.857   155.42
2164.50    0.860   157.45
2174.50    0.864   159.47
2184.50    0.868   161.46
2194.50    0.873   163.44
2204.50    0.878   165.39
2214.50    0.884   167.32
2224.50    0.890   169.22
2234.50    0.897   171.10
2244.50    0.904   172.94
2254.50    0.911   174.76
2264.50    0.920   176.55
2274.50    0.928   178.30
2284.50    0.937   180.02
2294.50    0.946   181.71
2304.50    0.956   183.36
2314.50    0.966   184.98
2324.50    0.977   186.57
2334.50    0.988   188.12
2344.50    0.999   189.64
2354.50    1.010   191.12
2364.50    1.022   192.57
2374.50    1.033   193.99
2384.50    1.045   195.38
2394.50    1.058   196.73
2404.50    1.070   198.05
2414.50    1.083   199.35
2424.50    1.095   200.61
2434.50    1.108   201.84
2444.50    1.121   203.05
2454.50    1.134   204.23
2464.50    1.147   205.38
2474.50    1.160   206.50
2484.50    1.173   207.60
2494.50    1.185   208.68
2504.50    1.198   209.73
2514.50    1.211   210.76
2524.50    1.224   211.77
2534.50    1.237   212.76
2544.50    1.249   213.73
2554.50    1.261   214.68
2564.50    1.274   215.61
2574.50    1.286   216.53
2584.50    1.298   217.42
2594.50    1.309   218.31
2604.50    1.321   219.17
2614.50    1.332   220.02
2624.50    1.342   220.86

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 18:11:25