Double Star Calculator - Orbit

Orbital Elements for B1261

WDS:	B1261	WDS ID/Discoverer
P:	200.000	Orbital period (years)
a:	0.471	Semi-major axis (arcseconds)
i:	78.6	Inclination (degrees)
Ω:	263.4	Longitude of ascending node (degrees)
T:	2024.270	Epoch of periastron passage (year)
e:	0.498	Eccentricity
ω:	69.0	Longitude of periastron (degrees)
Start-Year:	1925.0	Year
End-Year:	2125.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B1261
Position:	150505.43-430758.0	Epoch-2000 right ascension and declination
WDS-ID:	15051-4308	WDS designation
Discoverer Code:	B1261	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	133262	HD catalog number
Hipparcos number:	73804	Hipparcos catalog number
V1:	8.95	Magnitude of the primary
V2:	11.09	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Tok2022g	Reference

Double Star Orbit for B1261

WDS 6th Orbit including measures of B1261

-- 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 B1261

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.056   320.54
--------------------------
1925.00    0.279   111.27
1926.00    0.273   112.17
1927.00    0.266   113.12
1928.00    0.259   114.11
1929.00    0.252   115.16
1930.00    0.245   116.27
1931.00    0.238   117.44
1932.00    0.232   118.68
1933.00    0.225   120.00
1934.00    0.218   121.39
1935.00    0.211   122.88
1936.00    0.205   124.46
1937.00    0.199   126.14
1938.00    0.192   127.93
1939.00    0.186   129.84
1940.00    0.180   131.89
1941.00    0.174   134.07
1942.00    0.169   136.39
1943.00    0.163   138.88
1944.00    0.158   141.52
1945.00    0.154   144.34
1946.00    0.149   147.33
1947.00    0.145   150.49
1948.00    0.142   153.82
1949.00    0.138   157.32
1950.00    0.136   160.97
1951.00    0.134   164.74
1952.00    0.132   168.63
1953.00    0.131   172.59
1954.00    0.131   176.60
1955.00    0.131   180.61
1956.00    0.131   184.60
1957.00    0.133   188.52
1958.00    0.135   192.35
1959.00    0.137   196.06
1960.00    0.140   199.62
1961.00    0.143   203.03
1962.00    0.147   206.27
1963.00    0.151   209.34
1964.00    0.156   212.24
1965.00    0.161   214.97
1966.00    0.166   217.53
1967.00    0.171   219.93
1968.00    0.177   222.19
1969.00    0.183   224.31
1970.00    0.189   226.30
1971.00    0.195   228.16
1972.00    0.201   229.91
1973.00    0.207   231.56
1974.00    0.213   233.11
1975.00    0.219   234.58
1976.00    0.226   235.96
1977.00    0.232   237.26
1978.00    0.238   238.50
1979.00    0.244   239.68
1980.00    0.251   240.79
1981.00    0.257   241.86
1982.00    0.263   242.87
1983.00    0.269   243.84
1984.00    0.274   244.77
1985.00    0.280   245.66
1986.00    0.285   246.52
1987.00    0.291   247.35
1988.00    0.296   248.14
1989.00    0.301   248.91
1990.00    0.305   249.66
1991.00    0.310   250.38
1992.00    0.314   251.08
1993.00    0.318   251.77
1994.00    0.321   252.44
1995.00    0.324   253.10
1996.00    0.327   253.74
1997.00    0.330   254.37
1998.00    0.332   255.00
1999.00    0.333   255.62
2000.00    0.334   256.23
2001.00    0.335   256.85
2002.00    0.335   257.46
2003.00    0.334   258.07
2004.00    0.333   258.68
2005.00    0.331   259.30
2006.00    0.328   259.94
2007.00    0.324   260.58
2008.00    0.320   261.24
2009.00    0.315   261.92
2010.00    0.308   262.62
2011.00    0.301   263.36
2012.00    0.293   264.14
2013.00    0.283   264.96
2014.00    0.272   265.85
2015.00    0.260   266.82
2016.00    0.247   267.88
2017.00    0.232   269.07
2018.00    0.217   270.43
2019.00    0.200   272.01
2020.00    0.181   273.90
2021.00    0.162   276.22
2022.00    0.142   279.18
2023.00    0.122   283.14
2024.00    0.101   288.72
2025.00    0.081   297.15
2026.00    0.063   310.73
2027.00    0.051   332.79
2028.00    0.048     1.95
2029.00    0.058    27.06
2030.00    0.075    43.07
2031.00    0.094    52.83
2032.00    0.115    59.14
2033.00    0.136    63.49
2034.00    0.158    66.67
2035.00    0.178    69.11
2036.00    0.198    71.05
2037.00    0.218    72.63
2038.00    0.236    73.96
2039.00    0.254    75.10
2040.00    0.272    76.09
2041.00    0.288    76.97
2042.00    0.304    77.75
2043.00    0.318    78.46
2044.00    0.333    79.10
2045.00    0.346    79.70
2046.00    0.359    80.25
2047.00    0.371    80.76
2048.00    0.382    81.25
2049.00    0.393    81.70
2050.00    0.403    82.14
2051.00    0.412    82.55
2052.00    0.421    82.94
2053.00    0.429    83.32
2054.00    0.437    83.69
2055.00    0.444    84.04
2056.00    0.451    84.38
2057.00    0.457    84.71
2058.00    0.463    85.03
2059.00    0.469    85.35
2060.00    0.474    85.66
2061.00    0.478    85.96
2062.00    0.482    86.26
2063.00    0.486    86.55
2064.00    0.489    86.84
2065.00    0.492    87.12
2066.00    0.495    87.40
2067.00    0.497    87.68
2068.00    0.499    87.96
2069.00    0.500    88.23
2070.00    0.502    88.50
2071.00    0.503    88.77
2072.00    0.503    89.05
2073.00    0.504    89.32
2074.00    0.504    89.58
2075.00    0.504    89.85
2076.00    0.503    90.12
2077.00    0.503    90.39
2078.00    0.502    90.67
2079.00    0.501    90.94
2080.00    0.499    91.21
2081.00    0.498    91.49
2082.00    0.496    91.77
2083.00    0.494    92.04
2084.00    0.492    92.33
2085.00    0.489    92.61
2086.00    0.486    92.90
2087.00    0.484    93.19
2088.00    0.481    93.48
2089.00    0.477    93.78
2090.00    0.474    94.08
2091.00    0.471    94.39
2092.00    0.467    94.70
2093.00    0.463    95.02
2094.00    0.459    95.34
2095.00    0.455    95.67
2096.00    0.451    96.00
2097.00    0.446    96.34
2098.00    0.442    96.69
2099.00    0.437    97.05
2100.00    0.432    97.41
2101.00    0.427    97.78
2102.00    0.422    98.16
2103.00    0.417    98.55
2104.00    0.411    98.95
2105.00    0.406    99.36
2106.00    0.400    99.78
2107.00    0.395   100.21
2108.00    0.389   100.66
2109.00    0.383   101.12
2110.00    0.377   101.59
2111.00    0.371   102.08
2112.00    0.365   102.59
2113.00    0.359   103.11
2114.00    0.352   103.65
2115.00    0.346   104.21
2116.00    0.340   104.79
2117.00    0.333   105.40
2118.00    0.327   106.03
2119.00    0.320   106.68
2120.00    0.313   107.37
2121.00    0.307   108.08
2122.00    0.300   108.82
2123.00    0.293   109.60
2124.00    0.286   110.42

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 17:12:21