Double Star Calculator - Orbit

Orbital Elements for J420
WDS: J420 WDS ID/Discoverer
P: 168.450 Orbital period (years)
a: 1.921 Semi-major axis (arcseconds)
i: 104.0 Inclination (degrees)
Ω: 176.0 Longitude of ascending node (degrees)
T: 1954.170 Epoch of periastron passage (year)
e: 0.778 Eccentricity
ω: 136.4 Longitude of periastron (degrees)
Start-Year: 1940.775 Year
End-Year: 2109.225 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for J420
Position: 080615.16+020047.3 Epoch-2000 right ascension and declination
WDS-ID: 08062+0201 WDS designation
Discoverer Code: J420 Discover designation and components
ADS number: 6584 Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 39653 Hipparcos catalog number
V1: 11.06 Magnitude of the primary
V2: 11.46 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1991 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: Ole2002b Reference

Double Star Orbit for J420



WDS 6th Orbit including measures of J420

-- 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 J420
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    2.306   191.40
--------------------------
1940.78    1.409   173.72
1941.78    1.327   173.08
1942.78    1.241   172.35
1943.78    1.149   171.51
1944.78    1.050   170.51
1945.78    0.945   169.31
1946.78    0.831   167.78
1947.78    0.710   165.76
1948.78    0.579   162.85
1949.78    0.438   158.14
1950.78    0.291   148.76
1951.78    0.155   121.33
1952.78    0.140    48.37
1953.78    0.265    14.61
1954.78    0.389     3.12
1955.78    0.476   356.74
1956.78    0.525   351.99
1957.78    0.544   347.83
1958.78    0.544   343.80
1959.78    0.532   339.67
1960.78    0.513   335.29
1961.78    0.490   330.52
1962.78    0.465   325.26
1963.78    0.440   319.39
1964.78    0.418   312.87
1965.78    0.400   305.69
1966.78    0.386   297.90
1967.78    0.379   289.68
1968.78    0.378   281.28
1969.78    0.384   273.01
1970.78    0.398   265.15
1971.78    0.417   257.90
1972.78    0.441   251.36
1973.78    0.470   245.57
1974.78    0.502   240.48
1975.78    0.537   236.02
1976.78    0.574   232.13
1977.78    0.612   228.72
1978.78    0.652   225.71
1979.78    0.693   223.06
1980.78    0.734   220.70
1981.78    0.776   218.60
1982.78    0.818   216.71
1983.78    0.860   215.01
1984.78    0.902   213.46
1985.78    0.944   212.05
1986.78    0.986   210.77
1987.78    1.028   209.59
1988.78    1.070   208.50
1989.78    1.111   207.49
1990.78    1.152   206.55
1991.78    1.192   205.68
1992.78    1.233   204.86
1993.78    1.273   204.10
1994.78    1.312   203.38
1995.78    1.351   202.70
1996.78    1.389   202.07
1997.78    1.428   201.46
1998.78    1.465   200.89
1999.78    1.502   200.34
2000.78    1.539   199.83
2001.78    1.575   199.33
2002.78    1.611   198.86
2003.78    1.646   198.41
2004.78    1.681   197.97
2005.78    1.715   197.56
2006.78    1.749   197.16
2007.78    1.782   196.77
2008.78    1.815   196.40
2009.78    1.847   196.05
2010.78    1.879   195.70
2011.78    1.910   195.37
2012.78    1.940   195.04
2013.78    1.970   194.73
2014.78    2.000   194.43
2015.78    2.029   194.13
2016.78    2.057   193.84
2017.78    2.085   193.56
2018.78    2.113   193.29
2019.78    2.140   193.03
2020.78    2.166   192.77
2021.78    2.192   192.51
2022.78    2.217   192.27
2023.78    2.242   192.03
2024.78    2.266   191.79
2025.78    2.289   191.56
2026.78    2.313   191.33
2027.78    2.335   191.11
2028.78    2.357   190.89
2029.78    2.378   190.68
2030.78    2.399   190.47
2031.78    2.419   190.26
2032.78    2.439   190.06
2033.78    2.458   189.86
2034.78    2.476   189.66
2035.78    2.494   189.47
2036.78    2.511   189.28
2037.78    2.528   189.09
2038.78    2.544   188.90
2039.78    2.560   188.72
2040.78    2.575   188.54
2041.78    2.589   188.36
2042.78    2.603   188.18
2043.78    2.616   188.00
2044.78    2.628   187.83
2045.78    2.640   187.66
2046.78    2.651   187.48
2047.78    2.661   187.31
2048.78    2.671   187.15
2049.78    2.680   186.98
2050.78    2.689   186.81
2051.78    2.697   186.65
2052.78    2.704   186.48
2053.78    2.710   186.32
2054.78    2.716   186.16
2055.78    2.721   185.99
2056.78    2.725   185.83
2057.78    2.729   185.67
2058.78    2.732   185.51
2059.78    2.734   185.35
2060.78    2.735   185.19
2061.78    2.736   185.03
2062.78    2.736   184.87
2063.78    2.735   184.71
2064.78    2.733   184.55
2065.78    2.731   184.39
2066.78    2.727   184.23
2067.78    2.723   184.07
2068.78    2.718   183.90
2069.78    2.712   183.74
2070.78    2.705   183.58
2071.78    2.697   183.41
2072.78    2.689   183.25
2073.78    2.679   183.08
2074.78    2.668   182.91
2075.78    2.657   182.75
2076.78    2.644   182.57
2077.78    2.630   182.40
2078.78    2.616   182.23
2079.78    2.600   182.05
2080.78    2.583   181.87
2081.78    2.565   181.69
2082.78    2.546   181.51
2083.78    2.525   181.32
2084.78    2.504   181.13
2085.78    2.481   180.94
2086.78    2.456   180.74
2087.78    2.431   180.54
2088.78    2.404   180.34
2089.78    2.375   180.13
2090.78    2.345   179.91
2091.78    2.313   179.69
2092.78    2.280   179.46
2093.78    2.245   179.23
2094.78    2.208   178.99
2095.78    2.170   178.74
2096.78    2.129   178.48
2097.78    2.086   178.21
2098.78    2.042   177.93
2099.78    1.995   177.63
2100.78    1.945   177.32
2101.78    1.893   177.00
2102.78    1.839   176.65
2103.78    1.781   176.29
2104.78    1.721   175.90
2105.78    1.657   175.48
2106.78    1.590   175.02
2107.78    1.519   174.53
2108.78    1.444   173.98






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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 16:04:20



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