Double Star Calculator - Orbit

Orbital Elements for FR1

WDS:	FR1	WDS ID/Discoverer
P:	210.000	Orbital period (years)
a:	1.33	Semi-major axis (arcseconds)
i:	117.5	Inclination (degrees)
Ω:	219.9	Longitude of ascending node (degrees)
T:	1997.414	Epoch of periastron passage (year)
e:	0.31	Eccentricity
ω:	231.0	Longitude of periastron (degrees)
Start-Year:	1920.0	Year
End-Year:	2130.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for FR1
Position:	112205.75+465430.2	Epoch-2000 right ascension and declination
WDS-ID:	11221+4655	WDS designation
Discoverer Code:	FR1	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	55507	Hipparcos catalog number
V1:	6.6	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	2021	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Fr_2023a	Reference

Double Star Orbit for FR1

WDS 6th Orbit including measures of FR1

-- 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 FR1

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.903   244.87
--------------------------
1920.00    0.825   154.52
1921.00    0.813   152.53
1922.00    0.801   150.49
1923.00    0.790   148.38
1924.00    0.780   146.22
1925.00    0.770   144.00
1926.00    0.761   141.73
1927.00    0.753   139.41
1928.00    0.746   137.05
1929.00    0.740   134.64
1930.00    0.735   132.19
1931.00    0.731   129.71
1932.00    0.728   127.21
1933.00    0.726   124.69
1934.00    0.724   122.16
1935.00    0.724   119.62
1936.00    0.725   117.08
1937.00    0.727   114.56
1938.00    0.730   112.05
1939.00    0.734   109.56
1940.00    0.738   107.10
1941.00    0.744   104.68
1942.00    0.750   102.29
1943.00    0.757    99.95
1944.00    0.765    97.65
1945.00    0.774    95.41
1946.00    0.783    93.21
1947.00    0.793    91.07
1948.00    0.804    88.98
1949.00    0.814    86.94
1950.00    0.825    84.96
1951.00    0.837    83.04
1952.00    0.849    81.16
1953.00    0.861    79.34
1954.00    0.873    77.57
1955.00    0.885    75.84
1956.00    0.897    74.16
1957.00    0.909    72.53
1958.00    0.921    70.94
1959.00    0.932    69.39
1960.00    0.944    67.88
1961.00    0.955    66.40
1962.00    0.966    64.96
1963.00    0.976    63.54
1964.00    0.986    62.16
1965.00    0.995    60.80
1966.00    1.003    59.47
1967.00    1.011    58.16
1968.00    1.018    56.86
1969.00    1.024    55.59
1970.00    1.030    54.33
1971.00    1.034    53.08
1972.00    1.037    51.83
1973.00    1.039    50.60
1974.00    1.041    49.37
1975.00    1.040    48.14
1976.00    1.039    46.91
1977.00    1.036    45.67
1978.00    1.032    44.43
1979.00    1.027    43.17
1980.00    1.020    41.90
1981.00    1.011    40.61
1982.00    1.001    39.30
1983.00    0.990    37.95
1984.00    0.976    36.58
1985.00    0.962    35.16
1986.00    0.945    33.69
1987.00    0.927    32.18
1988.00    0.908    30.60
1989.00    0.887    28.94
1990.00    0.865    27.21
1991.00    0.841    25.38
1992.00    0.816    23.44
1993.00    0.790    21.37
1994.00    0.763    19.16
1995.00    0.735    16.79
1996.00    0.706    14.22
1997.00    0.677    11.43
1998.00    0.648     8.40
1999.00    0.619     5.08
2000.00    0.591     1.43
2001.00    0.563   357.43
2002.00    0.538   353.03
2003.00    0.514   348.21
2004.00    0.493   342.95
2005.00    0.475   337.26
2006.00    0.461   331.17
2007.00    0.451   324.76
2008.00    0.447   318.15
2009.00    0.447   311.46
2010.00    0.452   304.85
2011.00    0.462   298.45
2012.00    0.476   292.38
2013.00    0.494   286.72
2014.00    0.516   281.49
2015.00    0.541   276.72
2016.00    0.568   272.38
2017.00    0.597   268.45
2018.00    0.627   264.89
2019.00    0.658   261.66
2020.00    0.691   258.73
2021.00    0.723   256.07
2022.00    0.756   253.63
2023.00    0.789   251.40
2024.00    0.822   249.35
2025.00    0.855   247.46
2026.00    0.887   245.70
2027.00    0.919   244.07
2028.00    0.951   242.55
2029.00    0.981   241.12
2030.00    1.012   239.78
2031.00    1.041   238.52
2032.00    1.070   237.32
2033.00    1.098   236.19
2034.00    1.125   235.11
2035.00    1.152   234.08
2036.00    1.177   233.10
2037.00    1.202   232.16
2038.00    1.226   231.26
2039.00    1.249   230.39
2040.00    1.271   229.55
2041.00    1.293   228.74
2042.00    1.313   227.96
2043.00    1.333   227.19
2044.00    1.351   226.46
2045.00    1.369   225.74
2046.00    1.386   225.04
2047.00    1.403   224.35
2048.00    1.418   223.68
2049.00    1.433   223.03
2050.00    1.446   222.38
2051.00    1.459   221.75
2052.00    1.471   221.13
2053.00    1.483   220.52
2054.00    1.493   219.92
2055.00    1.503   219.33
2056.00    1.512   218.74
2057.00    1.520   218.16
2058.00    1.527   217.59
2059.00    1.534   217.02
2060.00    1.540   216.46
2061.00    1.545   215.90
2062.00    1.550   215.34
2063.00    1.554   214.79
2064.00    1.557   214.24
2065.00    1.559   213.69
2066.00    1.561   213.15
2067.00    1.562   212.60
2068.00    1.563   212.05
2069.00    1.562   211.51
2070.00    1.562   210.96
2071.00    1.560   210.42
2072.00    1.558   209.87
2073.00    1.556   209.32
2074.00    1.552   208.77
2075.00    1.549   208.22
2076.00    1.544   207.66
2077.00    1.539   207.10
2078.00    1.534   206.54
2079.00    1.528   205.97
2080.00    1.521   205.40
2081.00    1.514   204.82
2082.00    1.507   204.23
2083.00    1.499   203.65
2084.00    1.490   203.05
2085.00    1.481   202.45
2086.00    1.472   201.84
2087.00    1.462   201.22
2088.00    1.452   200.59
2089.00    1.441   199.95
2090.00    1.430   199.31
2091.00    1.418   198.65
2092.00    1.406   197.98
2093.00    1.394   197.31
2094.00    1.381   196.61
2095.00    1.368   195.91
2096.00    1.355   195.19
2097.00    1.341   194.46
2098.00    1.327   193.71
2099.00    1.313   192.95
2100.00    1.299   192.17
2101.00    1.284   191.37
2102.00    1.269   190.55
2103.00    1.253   189.71
2104.00    1.238   188.86
2105.00    1.222   187.98
2106.00    1.206   187.07
2107.00    1.190   186.14
2108.00    1.173   185.19
2109.00    1.157   184.21
2110.00    1.140   183.20
2111.00    1.124   182.16
2112.00    1.107   181.09
2113.00    1.090   179.99
2114.00    1.073   178.85
2115.00    1.057   177.68
2116.00    1.040   176.46
2117.00    1.023   175.21
2118.00    1.006   173.92
2119.00    0.990   172.58
2120.00    0.973   171.20
2121.00    0.957   169.77
2122.00    0.941   168.30
2123.00    0.925   166.77
2124.00    0.910   165.19
2125.00    0.895   163.55
2126.00    0.880   161.86
2127.00    0.866   160.11
2128.00    0.852   158.31
2129.00    0.838   156.44

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 16:37:59