Double Star Calculator - Orbit

Orbital Elements for DA1BC

WDS:	DA1BC	WDS ID/Discoverer
P:	236.520	Orbital period (years)
a:	0.448	Semi-major axis (arcseconds)
i:	68.6	Inclination (degrees)
Ω:	180.3	Longitude of ascending node (degrees)
T:	1998.220	Epoch of periastron passage (year)
e:	0.875	Eccentricity
ω:	237.0	Longitude of periastron (degrees)
Start-Year:	1906.74	Year
End-Year:	2143.26	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for DA1BC
Position:	203111.94+111533.7	Epoch-2000 right ascension and declination
WDS-ID:	20312+1116	WDS designation
Discoverer Code:	DA1BC	Discover designation and components
ADS number:	13946	Aitken Double Star catalog
HD number:	195482	HD catalog number
Hipparcos number:	101233	Hipparcos catalog number
V1:	7.9	Magnitude of the primary
V2:	8.0	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2006	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:	Hrt2014b	Reference

Double Star Orbit for DA1BC

WDS 6th Orbit including measures of DA1BC

-- 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 DA1BC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.417   191.97
--------------------------
1906.74    0.455   215.61
1907.74    0.452   215.87
1908.74    0.449   216.14
1909.74    0.446   216.41
1910.74    0.442   216.68
1911.74    0.439   216.96
1912.74    0.435   217.24
1913.74    0.432   217.53
1914.74    0.428   217.82
1915.74    0.425   218.12
1916.74    0.421   218.42
1917.74    0.417   218.72
1918.74    0.414   219.04
1919.74    0.410   219.35
1920.74    0.406   219.68
1921.74    0.402   220.01
1922.74    0.398   220.35
1923.74    0.395   220.69
1924.74    0.391   221.04
1925.74    0.387   221.40
1926.74    0.383   221.76
1927.74    0.378   222.13
1928.74    0.374   222.52
1929.74    0.370   222.90
1930.74    0.366   223.30
1931.74    0.362   223.71
1932.74    0.357   224.13
1933.74    0.353   224.56
1934.74    0.349   225.00
1935.74    0.344   225.44
1936.74    0.340   225.91
1937.74    0.335   226.38
1938.74    0.331   226.87
1939.74    0.326   227.37
1940.74    0.322   227.88
1941.74    0.317   228.41
1942.74    0.312   228.96
1943.74    0.308   229.52
1944.74    0.303   230.10
1945.74    0.298   230.70
1946.74    0.293   231.31
1947.74    0.288   231.95
1948.74    0.283   232.61
1949.74    0.279   233.30
1950.74    0.274   234.00
1951.74    0.269   234.74
1952.74    0.264   235.50
1953.74    0.259   236.29
1954.74    0.254   237.11
1955.74    0.249   237.97
1956.74    0.243   238.86
1957.74    0.238   239.79
1958.74    0.233   240.76
1959.74    0.228   241.78
1960.74    0.223   242.84
1961.74    0.218   243.95
1962.74    0.213   245.11
1963.74    0.208   246.33
1964.74    0.203   247.62
1965.74    0.197   248.97
1966.74    0.192   250.39
1967.74    0.187   251.89
1968.74    0.182   253.47
1969.74    0.177   255.14
1970.74    0.172   256.90
1971.74    0.167   258.77
1972.74    0.163   260.75
1973.74    0.158   262.85
1974.74    0.153   265.08
1975.74    0.149   267.44
1976.74    0.145   269.95
1977.74    0.140   272.61
1978.74    0.136   275.44
1979.74    0.132   278.43
1980.74    0.129   281.60
1981.74    0.125   284.95
1982.74    0.122   288.48
1983.74    0.119   292.19
1984.74    0.116   296.09
1985.74    0.114   300.16
1986.74    0.112   304.40
1987.74    0.110   308.80
1988.74    0.108   313.34
1989.74    0.106   318.03
1990.74    0.105   322.87
1991.74    0.103   327.86
1992.74    0.101   333.04
1993.74    0.098   338.49
1994.74    0.093   344.39
1995.74    0.085   351.13
1996.74    0.072   359.76
1997.74    0.049    14.57
1998.74    0.023    66.51
1999.74    0.040   144.22
2000.74    0.073   162.44
2001.74    0.103   169.52
2002.74    0.130   173.52
2003.74    0.153   176.22
2004.74    0.175   178.23
2005.74    0.194   179.82
2006.74    0.212   181.12
2007.74    0.229   182.24
2008.74    0.244   183.20
2009.74    0.258   184.06
2010.74    0.272   184.83
2011.74    0.285   185.53
2012.74    0.297   186.16
2013.74    0.308   186.75
2014.74    0.319   187.30
2015.74    0.329   187.82
2016.74    0.339   188.30
2017.74    0.349   188.75
2018.74    0.358   189.19
2019.74    0.367   189.60
2020.74    0.375   189.99
2021.74    0.383   190.37
2022.74    0.391   190.73
2023.74    0.398   191.07
2024.74    0.405   191.41
2025.74    0.412   191.73
2026.74    0.419   192.04
2027.74    0.425   192.35
2028.74    0.431   192.64
2029.74    0.437   192.93
2030.74    0.443   193.21
2031.74    0.448   193.48
2032.74    0.453   193.75
2033.74    0.458   194.01
2034.74    0.463   194.26
2035.74    0.468   194.51
2036.74    0.473   194.75
2037.74    0.477   194.99
2038.74    0.481   195.23
2039.74    0.485   195.46
2040.74    0.489   195.68
2041.74    0.493   195.91
2042.74    0.497   196.13
2043.74    0.500   196.35
2044.74    0.504   196.56
2045.74    0.507   196.77
2046.74    0.510   196.98
2047.74    0.513   197.19
2048.74    0.516   197.39
2049.74    0.519   197.59
2050.74    0.522   197.79
2051.74    0.524   197.99
2052.74    0.527   198.18
2053.74    0.529   198.38
2054.74    0.531   198.57
2055.74    0.534   198.76
2056.74    0.536   198.95
2057.74    0.538   199.13
2058.74    0.540   199.32
2059.74    0.541   199.50
2060.74    0.543   199.69
2061.74    0.545   199.87
2062.74    0.546   200.05
2063.74    0.548   200.23
2064.74    0.549   200.41
2065.74    0.550   200.59
2066.74    0.551   200.77
2067.74    0.552   200.95
2068.74    0.553   201.12
2069.74    0.554   201.30
2070.74    0.555   201.47
2071.74    0.556   201.65
2072.74    0.557   201.82
2073.74    0.557   202.00
2074.74    0.558   202.17
2075.74    0.558   202.34
2076.74    0.559   202.52
2077.74    0.559   202.69
2078.74    0.559   202.86
2079.74    0.560   203.03
2080.74    0.560   203.21
2081.74    0.560   203.38
2082.74    0.560   203.55
2083.74    0.560   203.72
2084.74    0.560   203.90
2085.74    0.559   204.07
2086.74    0.559   204.24
2087.74    0.559   204.41
2088.74    0.558   204.59
2089.74    0.558   204.76
2090.74    0.557   204.93
2091.74    0.557   205.11
2092.74    0.556   205.28
2093.74    0.555   205.46
2094.74    0.555   205.63
2095.74    0.554   205.81
2096.74    0.553   205.98
2097.74    0.552   206.16
2098.74    0.551   206.34
2099.74    0.550   206.52
2100.74    0.549   206.69
2101.74    0.548   206.87
2102.74    0.547   207.05
2103.74    0.545   207.23
2104.74    0.544   207.42
2105.74    0.543   207.60
2106.74    0.541   207.78
2107.74    0.540   207.97
2108.74    0.538   208.15
2109.74    0.537   208.34
2110.74    0.535   208.53
2111.74    0.533   208.72
2112.74    0.532   208.91
2113.74    0.530   209.10
2114.74    0.528   209.29
2115.74    0.526   209.49
2116.74    0.524   209.68
2117.74    0.522   209.88
2118.74    0.520   210.08
2119.74    0.518   210.28
2120.74    0.516   210.48
2121.74    0.514   210.68
2122.74    0.512   210.89
2123.74    0.509   211.09
2124.74    0.507   211.30
2125.74    0.505   211.51
2126.74    0.502   211.73
2127.74    0.500   211.94
2128.74    0.497   212.16
2129.74    0.495   212.38
2130.74    0.492   212.60
2131.74    0.489   212.82
2132.74    0.487   213.05
2133.74    0.484   213.28
2134.74    0.481   213.51
2135.74    0.478   213.75
2136.74    0.475   213.98
2137.74    0.472   214.22
2138.74    0.469   214.47
2139.74    0.466   214.71
2140.74    0.463   214.96
2141.74    0.460   215.22
2142.74    0.457   215.47

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 18:15:57