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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:12:47

Orbital Elements for HU821
WDS: HU821 WDS ID/Discoverer
P: 140.980 Orbital period (years)
a: 0.653 Semi-major axis (arcseconds)
i: 40.5 Inclination (degrees)
Ω: 53.9 Longitude of ascending node (degrees)
T: 1971.260 Epoch of periastron passage (year)
e: 0.616 Eccentricity
ω: 312.9 Longitude of periastron (degrees)
Start-Year: 1955.0 Year
End-Year: 2095.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU821
Position: 051401.68+512551.8 Epoch-2000 right ascension and declination
WDS-ID: 05140+5126 WDS designation
Discoverer Code: HU821 Discover designation and components
ADS number: 3780 Aitken Double Star catalog
HD number: 33580 HD catalog number
Hipparcos number: 24397 Hipparcos catalog number
V1: 7.43 Magnitude of the primary
V2: 9.94 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2012 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for HU821



WDS 6th Orbit including measures of HU821

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


Ephemeris of HU821
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.835    180.7
-------------------------
1955.0     0.544    247.0
1956.0     0.520    249.4
1957.0     0.495    251.9
1958.0     0.469    254.7
1959.0     0.442    257.8
1960.0     0.415    261.4
1961.0     0.386    265.5
1962.0     0.357    270.2
1963.0     0.328    275.7
1964.0     0.299    282.4
1965.0     0.272    290.4
1966.0     0.247    300.2
1967.0     0.226    311.9
1968.0     0.211    325.7
1969.0     0.205    340.9
1970.0     0.207    356.5
1971.0     0.217     11.1
1972.0     0.232     24.0
1973.0     0.250     35.3
1974.0     0.268     45.1
1975.0     0.285     53.6
1976.0     0.301     61.2
1977.0     0.316     68.1
1978.0     0.330     74.3
1979.0     0.343     80.1
1980.0     0.355     85.5
1981.0     0.367     90.5
1982.0     0.378     95.2
1983.0     0.390     99.6
1984.0     0.401    103.8
1985.0     0.412    107.7
1986.0     0.424    111.5
1987.0     0.435    115.0
1988.0     0.446    118.4
1989.0     0.458    121.6
1990.0     0.470    124.6
1991.0     0.481    127.5
1992.0     0.493    130.2
1993.0     0.505    132.9
1994.0     0.517    135.4
1995.0     0.528    137.7
1996.0     0.540    140.0
1997.0     0.552    142.2
1998.0     0.564    144.3
1999.0     0.576    146.3
2000.0     0.587    148.2
2001.0     0.599    150.1
2002.0     0.610    151.9
2003.0     0.622    153.6
2004.0     0.633    155.3
2005.0     0.645    156.9
2006.0     0.656    158.4
2007.0     0.667    159.9
2008.0     0.677    161.3
2009.0     0.688    162.7
2010.0     0.699    164.1
2011.0     0.709    165.4
2012.0     0.719    166.7
2013.0     0.729    167.9
2014.0     0.739    169.1
2015.0     0.749    170.3
2016.0     0.759    171.5
2017.0     0.768    172.6
2018.0     0.777    173.7
2019.0     0.786    174.7
2020.0     0.795    175.8
2021.0     0.803    176.8
2022.0     0.812    177.8
2023.0     0.820    178.8
2024.0     0.828    179.8
2025.0     0.835    180.7
2026.0     0.843    181.6
2027.0     0.850    182.5
2028.0     0.857    183.4
2029.0     0.864    184.3
2030.0     0.870    185.2
2031.0     0.876    186.0
2032.0     0.883    186.9
2033.0     0.888    187.7
2034.0     0.894    188.5
2035.0     0.899    189.3
2036.0     0.904    190.1
2037.0     0.909    190.9
2038.0     0.914    191.7
2039.0     0.918    192.5
2040.0     0.922    193.3
2041.0     0.926    194.0
2042.0     0.929    194.8
2043.0     0.932    195.5
2044.0     0.935    196.3
2045.0     0.938    197.0
2046.0     0.940    197.8
2047.0     0.942    198.5
2048.0     0.944    199.3
2049.0     0.945    200.0
2050.0     0.946    200.7
2051.0     0.947    201.4
2052.0     0.948    202.2
2053.0     0.948    202.9
2054.0     0.948    203.6
2055.0     0.948    204.3
2056.0     0.947    205.1
2057.0     0.946    205.8
2058.0     0.944    206.5
2059.0     0.943    207.3
2060.0     0.940    208.0
2061.0     0.938    208.7
2062.0     0.935    209.5
2063.0     0.932    210.2
2064.0     0.928    211.0
2065.0     0.924    211.7
2066.0     0.920    212.5
2067.0     0.915    213.3
2068.0     0.910    214.1
2069.0     0.904    214.9
2070.0     0.898    215.7
2071.0     0.892    216.5
2072.0     0.885    217.3
2073.0     0.877    218.1
2074.0     0.870    219.0
2075.0     0.861    219.9
2076.0     0.852    220.8
2077.0     0.843    221.7
2078.0     0.833    222.6
2079.0     0.823    223.5
2080.0     0.812    224.5
2081.0     0.800    225.5
2082.0     0.788    226.6
2083.0     0.775    227.6
2084.0     0.762    228.7
2085.0     0.748    229.9
2086.0     0.733    231.1
2087.0     0.718    232.3
2088.0     0.702    233.6
2089.0     0.685    235.0
2090.0     0.667    236.4
2091.0     0.649    237.9
2092.0     0.629    239.5
2093.0     0.609    241.2
2094.0     0.588    243.0






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 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.


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