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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 18:11:03

Orbital Elements for A78
WDS: A78 WDS ID/Discoverer
P: 111.930 Orbital period (years)
a: 0.263 Semi-major axis (arcseconds)
i: 49.3 Inclination (degrees)
Ω: 249.9 Longitude of ascending node (degrees)
T: 1997.500 Epoch of periastron passage (year)
e: 0.798 Eccentricity
ω: 42.1 Longitude of periastron (degrees)
Start-Year: 1970.0 Year
End-Year: 2080.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A78
Position: 122647.72-053531.6 Epoch-2000 right ascension and declination
WDS-ID: 12268-0536 WDS designation
Discoverer Code: A78 Discover designation and components
ADS number: 8551 Aitken Double Star catalog
HD number: 108320 HD catalog number
Hipparcos number: 60727 Hipparcos catalog number
V1: 8.11 Magnitude of the primary
V2: 8.79 Magnitude of the secondary
Equinox: Equinox
Date: 2007 Date of last observation
Orbit grade: 3 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for A78



WDS 6th Orbit including measures of A78

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


Ephemeris of A78
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.369     85.1
-------------------------
1970.0     0.287    120.3
1971.0     0.280    121.4
1972.0     0.273    122.5
1973.0     0.266    123.7
1974.0     0.258    125.0
1975.0     0.250    126.3
1976.0     0.243    127.8
1977.0     0.234    129.3
1978.0     0.226    131.0
1979.0     0.218    132.7
1980.0     0.209    134.7
1981.0     0.200    136.8
1982.0     0.191    139.0
1983.0     0.182    141.5
1984.0     0.173    144.3
1985.0     0.164    147.4
1986.0     0.154    150.9
1987.0     0.145    154.8
1988.0     0.135    159.2
1989.0     0.126    164.4
1990.0     0.117    170.3
1991.0     0.108    177.3
1992.0     0.099    185.5
1993.0     0.091    195.2
1994.0     0.083    206.8
1995.0     0.075    220.8
1996.0     0.066    238.1
1997.0     0.053    262.5
1998.0     0.040    304.7
1999.0     0.046    357.8
2000.0     0.068     26.6
2001.0     0.092     40.6
2002.0     0.115     48.8
2003.0     0.137     54.3
2004.0     0.157     58.4
2005.0     0.175     61.6
2006.0     0.191     64.2
2007.0     0.207     66.4
2008.0     0.221     68.3
2009.0     0.235     70.0
2010.0     0.248     71.5
2011.0     0.259     72.8
2012.0     0.271     74.1
2013.0     0.281     75.2
2014.0     0.291     76.3
2015.0     0.300     77.3
2016.0     0.309     78.3
2017.0     0.317     79.1
2018.0     0.325     80.0
2019.0     0.332     80.8
2020.0     0.339     81.6
2021.0     0.346     82.3
2022.0     0.352     83.0
2023.0     0.358     83.7
2024.0     0.363     84.4
2025.0     0.369     85.1
2026.0     0.373     85.7
2027.0     0.378     86.3
2028.0     0.382     86.9
2029.0     0.386     87.5
2030.0     0.390     88.1
2031.0     0.393     88.7
2032.0     0.396     89.2
2033.0     0.399     89.8
2034.0     0.401     90.3
2035.0     0.404     90.9
2036.0     0.406     91.4
2037.0     0.408     91.9
2038.0     0.409     92.5
2039.0     0.411     93.0
2040.0     0.412     93.5
2041.0     0.413     94.0
2042.0     0.413     94.5
2043.0     0.414     95.0
2044.0     0.414     95.5
2045.0     0.414     96.0
2046.0     0.414     96.6
2047.0     0.414     97.1
2048.0     0.413     97.6
2049.0     0.413     98.1
2050.0     0.412     98.6
2051.0     0.411     99.1
2052.0     0.409     99.6
2053.0     0.408    100.2
2054.0     0.406    100.7
2055.0     0.404    101.2
2056.0     0.402    101.8
2057.0     0.400    102.3
2058.0     0.398    102.9
2059.0     0.395    103.4
2060.0     0.393    104.0
2061.0     0.390    104.5
2062.0     0.387    105.1
2063.0     0.383    105.7
2064.0     0.380    106.3
2065.0     0.376    106.9
2066.0     0.372    107.5
2067.0     0.368    108.2
2068.0     0.364    108.8
2069.0     0.360    109.5
2070.0     0.355    110.2
2071.0     0.350    110.9
2072.0     0.346    111.6
2073.0     0.341    112.4
2074.0     0.335    113.1
2075.0     0.330    113.9
2076.0     0.324    114.7
2077.0     0.318    115.6
2078.0     0.312    116.5
2079.0     0.306    117.4






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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