Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:37:42

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:	1941.0	Year
End-Year:	2109.0	Year
Epoch:	2025.0	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' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for J420

WDS 6th Orbit including measures of J420

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)

Ephemeris of J420

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     2.271    191.7
-------------------------
1941.0     1.391    173.6
1942.0     1.308    172.9
1943.0     1.221    172.2
1944.0     1.127    171.3
1945.0     1.027    170.3
1946.0     0.920    169.0
1947.0     0.805    167.4
1948.0     0.681    165.2
1949.0     0.548    162.0
1950.0     0.406    156.6
1951.0     0.258    145.2
1952.0     0.133    108.1
1953.0     0.163     36.4
1954.0     0.295     11.2
1955.0     0.412      1.4
1956.0     0.490    355.6
1957.0     0.531    351.0
1958.0     0.546    346.9
1959.0     0.543    342.9
1960.0     0.529    338.7
1961.0     0.508    334.3
1962.0     0.484    329.4
1963.0     0.459    324.0
1964.0     0.435    318.0
1965.0     0.414    311.3
1966.0     0.396    304.0
1967.0     0.384    296.1
1968.0     0.378    287.8
1969.0     0.379    279.4
1970.0     0.387    271.2
1971.0     0.401    263.5
1972.0     0.422    256.4
1973.0     0.447    250.0
1974.0     0.477    244.4
1975.0     0.509    239.4
1976.0     0.545    235.1
1977.0     0.582    231.3
1978.0     0.621    228.0
1979.0     0.661    225.1
1980.0     0.702    222.5
1981.0     0.744    220.2
1982.0     0.785    218.2
1983.0     0.827    216.3
1984.0     0.870    214.6
1985.0     0.912    213.1
1986.0     0.954    211.8
1987.0     0.996    210.5
1988.0     1.038    209.3
1989.0     1.079    208.3
1990.0     1.120    207.3
1991.0     1.161    206.3
1992.0     1.202    205.5
1993.0     1.242    204.7
1994.0     1.281    203.9
1995.0     1.321    203.2
1996.0     1.360    202.6
1997.0     1.398    201.9
1998.0     1.436    201.3
1999.0     1.474    200.8
2000.0     1.511    200.2
2001.0     1.547    199.7
2002.0     1.583    199.2
2003.0     1.619    198.8
2004.0     1.654    198.3
2005.0     1.689    197.9
2006.0     1.723    197.5
2007.0     1.756    197.1
2008.0     1.789    196.7
2009.0     1.822    196.3
2010.0     1.854    196.0
2011.0     1.886    195.6
2012.0     1.917    195.3
2013.0     1.947    195.0
2014.0     1.977    194.7
2015.0     2.007    194.4
2016.0     2.035    194.1
2017.0     2.064    193.8
2018.0     2.092    193.5
2019.0     2.119    193.2
2020.0     2.146    193.0
2021.0     2.172    192.7
2022.0     2.198    192.5
2023.0     2.223    192.2
2024.0     2.247    192.0
2025.0     2.271    191.7
2026.0     2.295    191.5
2027.0     2.318    191.3
2028.0     2.340    191.1
2029.0     2.362    190.8
2030.0     2.383    190.6
2031.0     2.404    190.4
2032.0     2.424    190.2
2033.0     2.443    190.0
2034.0     2.462    189.8
2035.0     2.480    189.6
2036.0     2.498    189.4
2037.0     2.515    189.2
2038.0     2.532    189.0
2039.0     2.548    188.9
2040.0     2.563    188.7
2041.0     2.578    188.5
2042.0     2.592    188.3
2043.0     2.606    188.1
2044.0     2.618    188.0
2045.0     2.631    187.8
2046.0     2.642    187.6
2047.0     2.653    187.4
2048.0     2.664    187.3
2049.0     2.673    187.1
2050.0     2.682    186.9
2051.0     2.691    186.8
2052.0     2.698    186.6
2053.0     2.705    186.4
2054.0     2.712    186.3
2055.0     2.717    186.1
2056.0     2.722    186.0
2057.0     2.726    185.8
2058.0     2.730    185.6
2059.0     2.732    185.5
2060.0     2.734    185.3
2061.0     2.736    185.2
2062.0     2.736    185.0
2063.0     2.736    184.8
2064.0     2.735    184.7
2065.0     2.733    184.5
2066.0     2.730    184.4
2067.0     2.726    184.2
2068.0     2.722    184.0
2069.0     2.717    183.9
2070.0     2.710    183.7
2071.0     2.703    183.5
2072.0     2.695    183.4
2073.0     2.686    183.2
2074.0     2.677    183.0
2075.0     2.666    182.9
2076.0     2.654    182.7
2077.0     2.641    182.5
2078.0     2.627    182.4
2079.0     2.612    182.2
2080.0     2.596    182.0
2081.0     2.579    181.8
2082.0     2.561    181.7
2083.0     2.541    181.5
2084.0     2.520    181.3
2085.0     2.498    181.1
2086.0     2.475    180.9
2087.0     2.451    180.7
2088.0     2.425    180.5
2089.0     2.397    180.3
2090.0     2.368    180.1
2091.0     2.338    179.9
2092.0     2.306    179.6
2093.0     2.272    179.4
2094.0     2.237    179.2
2095.0     2.200    178.9
2096.0     2.161    178.7
2097.0     2.120    178.4
2098.0     2.077    178.1
2099.0     2.031    177.9
2100.0     1.984    177.6
2101.0     1.934    177.3
2102.0     1.881    176.9
2103.0     1.826    176.6
2104.0     1.768    176.2
2105.0     1.707    175.8
2106.0     1.643    175.4
2107.0     1.575    174.9
2108.0     1.503    174.4

Disclaimer

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.