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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 18:48:47

Orbital Elements for BU631
WDS: BU631 WDS ID/Discoverer
P: 147.500 Orbital period (years)
a: 0.217 Semi-major axis (arcseconds)
i: 162.5 Inclination (degrees)
Ω: 26.8 Longitude of ascending node (degrees)
T: 1978.300 Epoch of periastron passage (year)
e: 0.78 Eccentricity
ω: 146.0 Longitude of periastron (degrees)
Start-Year: 1952.0 Year
End-Year: 2098.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU631
Position: 173957.70-003821.2 Epoch-2000 right ascension and declination
WDS-ID: 17400-0038 WDS designation
Discoverer Code: BU631 Discover designation and components
ADS number: 10696 Aitken Double Star catalog
HD number: 160438 HD catalog number
Hipparcos number: 86463 Hipparcos catalog number
V1: 7.23 Magnitude of the primary
V2: 7.40 Magnitude of the secondary
Equinox: Equinox
Date: Date of last observation
Orbit grade: 2 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for BU631



WDS 6th Orbit including measures of BU631

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


Ephemeris of BU631
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.341     73.4
-------------------------
1952.0     0.266     31.4
1953.0     0.261     30.4
1954.0     0.255     29.4
1955.0     0.249     28.3
1956.0     0.242     27.1
1957.0     0.236     25.9
1958.0     0.229     24.7
1959.0     0.222     23.3
1960.0     0.215     21.9
1961.0     0.208     20.4
1962.0     0.200     18.7
1963.0     0.192     16.9
1964.0     0.184     15.0
1965.0     0.175     12.8
1966.0     0.166     10.5
1967.0     0.157      7.8
1968.0     0.147      4.9
1969.0     0.137      1.4
1970.0     0.126    357.5
1971.0     0.116    352.8
1972.0     0.104    347.1
1973.0     0.093    340.0
1974.0     0.081    330.9
1975.0     0.069    318.7
1976.0     0.059    301.7
1977.0     0.051    278.3
1978.0     0.047    248.9
1979.0     0.049    218.6
1980.0     0.056    193.3
1981.0     0.065    174.2
1982.0     0.075    160.0
1983.0     0.085    149.3
1984.0     0.096    140.9
1985.0     0.106    134.1
1986.0     0.116    128.6
1987.0     0.126    123.9
1988.0     0.136    119.9
1989.0     0.145    116.4
1990.0     0.154    113.3
1991.0     0.162    110.6
1992.0     0.171    108.1
1993.0     0.179    105.9
1994.0     0.187    103.8
1995.0     0.194    101.9
1996.0     0.202    100.2
1997.0     0.209     98.5
1998.0     0.216     97.0
1999.0     0.222     95.6
2000.0     0.229     94.2
2001.0     0.235     93.0
2002.0     0.241     91.8
2003.0     0.247     90.6
2004.0     0.253     89.5
2005.0     0.259     88.5
2006.0     0.264     87.5
2007.0     0.269     86.5
2008.0     0.275     85.6
2009.0     0.280     84.7
2010.0     0.284     83.8
2011.0     0.289     83.0
2012.0     0.294     82.2
2013.0     0.298     81.4
2014.0     0.302     80.6
2015.0     0.306     79.9
2016.0     0.310     79.2
2017.0     0.314     78.5
2018.0     0.318     77.8
2019.0     0.322     77.1
2020.0     0.325     76.5
2021.0     0.329     75.8
2022.0     0.332     75.2
2023.0     0.335     74.6
2024.0     0.338     74.0
2025.0     0.341     73.4
2026.0     0.344     72.8
2027.0     0.346     72.2
2028.0     0.349     71.6
2029.0     0.352     71.1
2030.0     0.354     70.5
2031.0     0.356     70.0
2032.0     0.358     69.5
2033.0     0.360     68.9
2034.0     0.362     68.4
2035.0     0.364     67.9
2036.0     0.366     67.4
2037.0     0.368     66.9
2038.0     0.369     66.3
2039.0     0.371     65.8
2040.0     0.372     65.4
2041.0     0.373     64.9
2042.0     0.374     64.4
2043.0     0.376     63.9
2044.0     0.377     63.4
2045.0     0.377     62.9
2046.0     0.378     62.4
2047.0     0.379     62.0
2048.0     0.379     61.5
2049.0     0.380     61.0
2050.0     0.380     60.5
2051.0     0.381     60.0
2052.0     0.381     59.6
2053.0     0.381     59.1
2054.0     0.381     58.6
2055.0     0.381     58.2
2056.0     0.381     57.7
2057.0     0.380     57.2
2058.0     0.380     56.7
2059.0     0.379     56.3
2060.0     0.379     55.8
2061.0     0.378     55.3
2062.0     0.377     54.8
2063.0     0.376     54.3
2064.0     0.375     53.9
2065.0     0.374     53.4
2066.0     0.373     52.9
2067.0     0.372     52.4
2068.0     0.371     51.9
2069.0     0.369     51.4
2070.0     0.367     50.9
2071.0     0.366     50.4
2072.0     0.364     49.9
2073.0     0.362     49.3
2074.0     0.360     48.8
2075.0     0.358     48.3
2076.0     0.356     47.7
2077.0     0.353     47.2
2078.0     0.351     46.6
2079.0     0.348     46.1
2080.0     0.346     45.5
2081.0     0.343     44.9
2082.0     0.340     44.3
2083.0     0.337     43.7
2084.0     0.334     43.1
2085.0     0.330     42.5
2086.0     0.327     41.9
2087.0     0.323     41.2
2088.0     0.319     40.5
2089.0     0.316     39.9
2090.0     0.312     39.2
2091.0     0.308     38.5
2092.0     0.303     37.7
2093.0     0.299     37.0
2094.0     0.294     36.2
2095.0     0.290     35.4
2096.0     0.285     34.5
2097.0     0.280     33.7






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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