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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:41:12

Orbital Elements for BU208AB
WDS: BU208AB WDS ID/Discoverer
P: 127.340 Orbital period (years)
a: 1.665 Semi-major axis (arcseconds)
i: 83.6 Inclination (degrees)
Ω: 31.3 Longitude of ascending node (degrees)
T: 1986.200 Epoch of periastron passage (year)
e: 0.298 Eccentricity
ω: 305.0 Longitude of periastron (degrees)
Start-Year: 1962.0 Year
End-Year: 2088.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU208AB
Position: 083907.90-223942.8 Epoch-2000 right ascension and declination
WDS-ID: 08391-2240 WDS designation
Discoverer Code: BU208AB Discover designation and components
ADS number: 6914 Aitken Double Star catalog
HD number: 73752 HD catalog number
Hipparcos number: 42430 Hipparcos catalog number
V1: 5.37 Magnitude of the primary
V2: 6.81 Magnitude of the secondary
Equinox: Equinox
Date: 2021 Date of last observation
Orbit grade: 2 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for BU208AB



WDS 6th Orbit including measures of BU208AB

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


Ephemeris of BU208AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.340     70.4
-------------------------
1962.0     1.508    213.9
1963.0     1.453    214.3
1964.0     1.394    214.7
1965.0     1.331    215.1
1966.0     1.265    215.6
1967.0     1.194    216.2
1968.0     1.120    216.8
1969.0     1.041    217.5
1970.0     0.959    218.3
1971.0     0.874    219.3
1972.0     0.785    220.6
1973.0     0.694    222.1
1974.0     0.600    224.1
1975.0     0.503    226.9
1976.0     0.407    230.9
1977.0     0.311    237.5
1978.0     0.221    249.7
1979.0     0.152    275.3
1980.0     0.141    317.9
1981.0     0.198    349.2
1982.0     0.284      4.2
1983.0     0.379     11.9
1984.0     0.474     16.6
1985.0     0.569     19.7
1986.0     0.661     21.9
1987.0     0.749     23.6
1988.0     0.832     24.9
1989.0     0.910     26.0
1990.0     0.982     26.9
1991.0     1.047     27.7
1992.0     1.106     28.5
1993.0     1.158     29.1
1994.0     1.203     29.7
1995.0     1.241     30.3
1996.0     1.272     30.8
1997.0     1.296     31.3
1998.0     1.314     31.8
1999.0     1.325     32.3
2000.0     1.330     32.7
2001.0     1.330     33.2
2002.0     1.323     33.7
2003.0     1.312     34.2
2004.0     1.296     34.7
2005.0     1.275     35.2
2006.0     1.250     35.7
2007.0     1.221     36.2
2008.0     1.189     36.8
2009.0     1.153     37.4
2010.0     1.114     38.1
2011.0     1.072     38.8
2012.0     1.028     39.5
2013.0     0.981     40.3
2014.0     0.932     41.3
2015.0     0.882     42.3
2016.0     0.830     43.4
2017.0     0.776     44.7
2018.0     0.721     46.2
2019.0     0.666     47.9
2020.0     0.610     50.0
2021.0     0.554     52.5
2022.0     0.498     55.5
2023.0     0.443     59.2
2024.0     0.390     64.1
2025.0     0.340     70.4
2026.0     0.295     78.7
2027.0     0.258     89.7
2028.0     0.233    103.8
2029.0     0.224    120.0
2030.0     0.233    136.2
2031.0     0.259    150.2
2032.0     0.296    161.2
2033.0     0.341    169.4
2034.0     0.392    175.7
2035.0     0.445    180.5
2036.0     0.501    184.2
2037.0     0.557    187.2
2038.0     0.614    189.6
2039.0     0.671    191.7
2040.0     0.728    193.4
2041.0     0.785    194.8
2042.0     0.841    196.1
2043.0     0.897    197.2
2044.0     0.952    198.2
2045.0     1.006    199.1
2046.0     1.059    199.8
2047.0     1.112    200.5
2048.0     1.163    201.2
2049.0     1.213    201.8
2050.0     1.261    202.3
2051.0     1.309    202.8
2052.0     1.355    203.3
2053.0     1.400    203.7
2054.0     1.443    204.2
2055.0     1.484    204.5
2056.0     1.524    204.9
2057.0     1.563    205.3
2058.0     1.599    205.6
2059.0     1.634    205.9
2060.0     1.667    206.2
2061.0     1.698    206.5
2062.0     1.727    206.8
2063.0     1.754    207.1
2064.0     1.779    207.3
2065.0     1.802    207.6
2066.0     1.823    207.9
2067.0     1.841    208.1
2068.0     1.857    208.3
2069.0     1.871    208.6
2070.0     1.882    208.8
2071.0     1.890    209.1
2072.0     1.896    209.3
2073.0     1.899    209.5
2074.0     1.900    209.8
2075.0     1.897    210.0
2076.0     1.892    210.2
2077.0     1.884    210.4
2078.0     1.873    210.7
2079.0     1.858    210.9
2080.0     1.841    211.2
2081.0     1.820    211.4
2082.0     1.796    211.7
2083.0     1.768    211.9
2084.0     1.737    212.2
2085.0     1.702    212.5
2086.0     1.663    212.8
2087.0     1.621    213.1






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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