Double Star Calculator - Orbit

Orbital Elements for HDS169

WDS:	HDS169	WDS ID/Discoverer
P:	143.730	Orbital period (years)
a:	0.767	Semi-major axis (arcseconds)
i:	118.3	Inclination (degrees)
Ω:	102.7	Longitude of ascending node (degrees)
T:	2115.160	Epoch of periastron passage (year)
e:	0.575	Eccentricity
ω:	93.9	Longitude of periastron (degrees)
Start-Year:	1953.135	Year
End-Year:	2096.865	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS169
Position:	011636.45+183121.6	Epoch-2000 right ascension and declination
WDS-ID:	01166+1831	WDS designation
Discoverer Code:	HDS169	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	7640	HD catalog number
Hipparcos number:	5952	Hipparcos catalog number
V1:	8.61	Magnitude of the primary
V2:	12.20	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2010	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Hrt2011d	Reference

Double Star Orbit for HDS169

WDS 6th Orbit including measures of HDS169

-- 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 HDS169

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.580   213.78
--------------------------
1953.13    0.642   112.90
1954.13    0.629   111.49
1955.13    0.615   110.01
1956.13    0.599   108.46
1957.13    0.582   106.82
1958.13    0.562   105.08
1959.13    0.540   103.20
1960.13    0.516   101.15
1961.13    0.489    98.88
1962.13    0.460    96.35
1963.13    0.428    93.45
1964.13    0.393    90.06
1965.13    0.355    85.97
1966.13    0.315    80.87
1967.13    0.273    74.24
1968.13    0.232    65.22
1969.13    0.194    52.44
1970.13    0.165    34.39
1971.13    0.155    11.53
1972.13    0.166   348.77
1973.13    0.195   330.88
1974.13    0.233   318.22
1975.13    0.274   309.25
1976.13    0.315   302.61
1977.13    0.353   297.48
1978.13    0.389   293.33
1979.13    0.422   289.86
1980.13    0.452   286.87
1981.13    0.479   284.23
1982.13    0.503   281.85
1983.13    0.524   279.68
1984.13    0.543   277.67
1985.13    0.559   275.79
1986.13    0.574   274.01
1987.13    0.587   272.32
1988.13    0.598   270.69
1989.13    0.608   269.12
1990.13    0.616   267.59
1991.13    0.623   266.10
1992.13    0.629   264.65
1993.13    0.634   263.21
1994.13    0.638   261.80
1995.13    0.641   260.41
1996.13    0.644   259.02
1997.13    0.646   257.65
1998.13    0.647   256.28
1999.13    0.647   254.91
2000.13    0.647   253.55
2001.13    0.647   252.19
2002.13    0.646   250.82
2003.13    0.645   249.44
2004.13    0.643   248.07
2005.13    0.641   246.68
2006.13    0.639   245.28
2007.13    0.636   243.88
2008.13    0.634   242.46
2009.13    0.631   241.03
2010.13    0.628   239.59
2011.13    0.625   238.14
2012.13    0.622   236.66
2013.13    0.619   235.18
2014.13    0.615   233.68
2015.13    0.612   232.16
2016.13    0.609   230.63
2017.13    0.606   229.08
2018.13    0.602   227.51
2019.13    0.599   225.93
2020.13    0.596   224.33
2021.13    0.593   222.71
2022.13    0.590   221.08
2023.13    0.588   219.43
2024.13    0.585   217.77
2025.13    0.583   216.09
2026.13    0.580   214.40
2027.13    0.578   212.70
2028.13    0.577   210.98
2029.13    0.575   209.26
2030.13    0.573   207.53
2031.13    0.572   205.78
2032.13    0.571   204.04
2033.13    0.571   202.28
2034.13    0.570   200.52
2035.13    0.570   198.76
2036.13    0.570   197.00
2037.13    0.570   195.24
2038.13    0.571   193.49
2039.13    0.571   191.73
2040.13    0.572   189.99
2041.13    0.574   188.25
2042.13    0.575   186.51
2043.13    0.577   184.79
2044.13    0.579   183.08
2045.13    0.581   181.38
2046.13    0.584   179.70
2047.13    0.586   178.03
2048.14    0.589   176.37
2049.14    0.592   174.73
2050.14    0.595   173.11
2051.14    0.599   171.51
2052.14    0.602   169.93
2053.14    0.606   168.36
2054.14    0.610   166.82
2055.14    0.614   165.29
2056.14    0.618   163.78
2057.14    0.622   162.30
2058.14    0.627   160.83
2059.14    0.631   159.39
2060.14    0.635   157.96
2061.14    0.640   156.56
2062.14    0.644   155.17
2063.14    0.649   153.80
2064.14    0.653   152.46
2065.14    0.658   151.13
2066.14    0.662   149.81
2067.14    0.666   148.52
2068.14    0.671   147.24
2069.14    0.675   145.98
2070.14    0.679   144.73
2071.14    0.683   143.49
2072.14    0.686   142.27
2073.14    0.690   141.07
2074.14    0.693   139.87
2075.14    0.696   138.69
2076.14    0.699   137.51
2077.14    0.702   136.35
2078.14    0.704   135.19
2079.14    0.706   134.04
2080.14    0.707   132.89
2081.14    0.708   131.75
2082.14    0.709   130.61
2083.14    0.709   129.48
2084.14    0.709   128.34
2085.14    0.708   127.20
2086.14    0.707   126.06
2087.14    0.705   124.92
2088.14    0.702   123.76
2089.14    0.699   122.60
2090.14    0.695   121.42
2091.14    0.690   120.23
2092.14    0.684   119.02
2093.14    0.677   117.79
2094.14    0.669   116.53
2095.14    0.660   115.23
2096.14    0.650   113.90

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 14:49:13