Double Star Calculator - Orbit

Orbital Elements for STT177

WDS:	STT177	WDS ID/Discoverer
P:	174.000	Orbital period (years)
a:	0.334	Semi-major axis (arcseconds)
i:	180.0	Inclination (degrees)
Ω:	60.7	Longitude of ascending node (degrees)
T:	1956.640	Epoch of periastron passage (year)
e:	0.792	Eccentricity
ω:	105.6	Longitude of periastron (degrees)
Start-Year:	1938.0	Year
End-Year:	2112.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT177
Position:	074141.62+372548.2	Epoch-2000 right ascension and declination
WDS-ID:	07417+3726	WDS designation
Discoverer Code:	STT177	Discover designation and components
ADS number:	6276	Aitken Double Star catalog
HD number:	61600	HD catalog number
Hipparcos number:	37483	Hipparcos catalog number
V1:	7.96	Magnitude of the primary
V2:	9.24	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Sca2018e	Reference

Double Star Orbit for STT177

WDS 6th Orbit including measures of STT177

-- 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 STT177

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.583   141.96
--------------------------
1938.00    0.305    93.43
1939.00    0.294    91.86
1940.00    0.283    90.17
1941.00    0.272    88.34
1942.00    0.261    86.35
1943.00    0.249    84.18
1944.00    0.236    81.78
1945.00    0.224    79.11
1946.00    0.210    76.12
1947.00    0.197    72.71
1948.00    0.183    68.79
1949.00    0.168    64.20
1950.00    0.153    58.72
1951.00    0.138    52.04
1952.00    0.122    43.65
1953.00    0.107    32.81
1954.00    0.092    18.37
1955.00    0.079   358.87
1956.00    0.071   333.50
1957.00    0.070   304.64
1958.00    0.076   277.86
1959.00    0.088   256.72
1960.00    0.102   241.01
1961.00    0.118   229.29
1962.00    0.133   220.31
1963.00    0.149   213.21
1964.00    0.164   207.43
1965.00    0.179   202.62
1966.00    0.193   198.53
1967.00    0.207   194.99
1968.00    0.220   191.89
1969.00    0.233   189.14
1970.00    0.245   186.67
1971.00    0.257   184.44
1972.00    0.269   182.40
1973.00    0.280   180.53
1974.00    0.291   178.80
1975.00    0.302   177.20
1976.00    0.312   175.71
1977.00    0.322   174.31
1978.00    0.332   172.99
1979.00    0.341   171.75
1980.00    0.351   170.57
1981.00    0.360   169.45
1982.00    0.368   168.39
1983.00    0.377   167.38
1984.00    0.385   166.40
1985.00    0.393   165.47
1986.00    0.401   164.58
1987.00    0.408   163.72
1988.00    0.416   162.89
1989.00    0.423   162.09
1990.00    0.430   161.31
1991.00    0.437   160.56
1992.00    0.444   159.84
1993.00    0.450   159.13
1994.00    0.456   158.45
1995.00    0.462   157.78
1996.00    0.468   157.13
1997.00    0.474   156.49
1998.00    0.480   155.87
1999.00    0.485   155.27
2000.00    0.491   154.68
2001.00    0.496   154.10
2002.00    0.501   153.53
2003.00    0.506   152.97
2004.00    0.510   152.43
2005.00    0.515   151.89
2006.00    0.519   151.36
2007.00    0.524   150.85
2008.00    0.528   150.34
2009.00    0.532   149.83
2010.00    0.536   149.34
2011.00    0.540   148.85
2012.00    0.543   148.37
2013.00    0.547   147.90
2014.00    0.550   147.43
2015.00    0.553   146.97
2016.00    0.557   146.51
2017.00    0.560   146.06
2018.00    0.563   145.61
2019.00    0.565   145.17
2020.00    0.568   144.73
2021.00    0.571   144.29
2022.00    0.573   143.86
2023.00    0.575   143.43
2024.00    0.578   143.01
2025.00    0.580   142.59
2026.00    0.582   142.17
2027.00    0.584   141.76
2028.00    0.585   141.34
2029.00    0.587   140.93
2030.00    0.588   140.53
2031.00    0.590   140.12
2032.00    0.591   139.72
2033.00    0.592   139.31
2034.00    0.594   138.91
2035.00    0.595   138.51
2036.00    0.595   138.12
2037.00    0.596   137.72
2038.00    0.597   137.32
2039.00    0.597   136.93
2040.00    0.598   136.53
2041.00    0.598   136.14
2042.00    0.598   135.75
2043.00    0.599   135.35
2044.00    0.599   134.96
2045.00    0.598   134.56
2046.00    0.598   134.17
2047.00    0.598   133.78
2048.00    0.598   133.38
2049.00    0.597   132.99
2050.00    0.596   132.59
2051.00    0.596   132.20
2052.00    0.595   131.80
2053.00    0.594   131.40
2054.00    0.593   131.00
2055.00    0.592   130.60
2056.00    0.590   130.19
2057.00    0.589   129.79
2058.00    0.587   129.38
2059.00    0.586   128.97
2060.00    0.584   128.56
2061.00    0.582   128.14
2062.00    0.580   127.73
2063.00    0.578   127.31
2064.00    0.576   126.88
2065.00    0.574   126.46
2066.00    0.571   126.03
2067.00    0.569   125.59
2068.00    0.566   125.16
2069.00    0.563   124.72
2070.00    0.561   124.27
2071.00    0.558   123.82
2072.00    0.554   123.36
2073.00    0.551   122.90
2074.00    0.548   122.43
2075.00    0.544   121.96
2076.00    0.541   121.48
2077.00    0.537   121.00
2078.00    0.533   120.51
2079.00    0.529   120.01
2080.00    0.525   119.50
2081.00    0.521   118.98
2082.00    0.516   118.46
2083.00    0.512   117.92
2084.00    0.507   117.38
2085.00    0.502   116.83
2086.00    0.497   116.26
2087.00    0.492   115.69
2088.00    0.487   115.10
2089.00    0.481   114.50
2090.00    0.476   113.88
2091.00    0.470   113.25
2092.00    0.464   112.61
2093.00    0.458   111.94
2094.00    0.452   111.26
2095.00    0.445   110.56
2096.00    0.439   109.84
2097.00    0.432   109.10
2098.00    0.425   108.33
2099.00    0.418   107.54
2100.00    0.411   106.72
2101.00    0.403   105.86
2102.00    0.395   104.98
2103.00    0.387   104.06
2104.00    0.379   103.10
2105.00    0.371   102.10
2106.00    0.362   101.05
2107.00    0.353    99.95
2108.00    0.344    98.79
2109.00    0.335    97.56
2110.00    0.325    96.27
2111.00    0.315    94.89

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 16:00:00