Double Star Calculator - Orbit

Orbital Elements for BU631

WDS:	BU631	WDS ID/Discoverer
P:	165.030	Orbital period (years)
a:	0.219	Semi-major axis (arcseconds)
i:	159.9	Inclination (degrees)
Ω:	30.9	Longitude of ascending node (degrees)
T:	1978.250	Epoch of periastron passage (year)
e:	0.805	Eccentricity
ω:	148.3	Longitude of periastron (degrees)
Start-Year:	1942.485	Year
End-Year:	2107.515	Year
Epoch:	2026.5	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:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	2	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Doc2023c	Reference

Double Star Orbit for BU631

WDS 6th Orbit including measures of BU631

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

Legend:

Green plus signs:	Visual (micrometric) measures
Violet asterisks:	Photographic measures
Blue symbols:	Various interferometric techniques
Dot-dash line:	Indicates the line of nodes

Ephemeris of BU631

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.337    75.62
--------------------------
1942.48    0.303    39.91
1943.48    0.298    39.27
1944.48    0.294    38.60
1945.48    0.290    37.92
1946.48    0.285    37.21
1947.48    0.280    36.48
1948.48    0.275    35.73
1949.48    0.270    34.94
1950.48    0.265    34.13
1951.48    0.259    33.28
1952.48    0.254    32.40
1953.48    0.248    31.47
1954.48    0.242    30.50
1955.48    0.236    29.48
1956.48    0.230    28.41
1957.48    0.223    27.27
1958.48    0.217    26.07
1959.48    0.210    24.78
1960.48    0.202    23.41
1961.48    0.195    21.93
1962.48    0.187    20.34
1963.48    0.179    18.60
1964.48    0.171    16.70
1965.48    0.163    14.61
1966.48    0.154    12.27
1967.48    0.144     9.65
1968.48    0.135     6.66
1969.48    0.125     3.20
1970.48    0.114   359.12
1971.48    0.104   354.21
1972.48    0.092   348.13
1973.48    0.081   340.36
1974.48    0.069   329.99
1975.48    0.058   315.53
1976.48    0.049   294.79
1977.48    0.043   266.22
1978.48    0.042   233.33
1979.48    0.047   203.93
1980.48    0.055   181.56
1981.48    0.065   165.26
1982.48    0.075   153.20
1983.48    0.085   143.99
1984.48    0.095   136.74
1985.48    0.104   130.85
1986.48    0.114   125.96
1987.48    0.123   121.81
1988.48    0.132   118.24
1989.48    0.141   115.11
1990.48    0.149   112.34
1991.48    0.158   109.87
1992.48    0.165   107.63
1993.48    0.173   105.59
1994.48    0.181   103.73
1995.48    0.188   102.01
1996.48    0.195   100.42
1997.48    0.202    98.94
1998.48    0.208    97.55
1999.48    0.215    96.25
2000.48    0.221    95.02
2001.48    0.227    93.86
2002.48    0.233    92.76
2003.48    0.239    91.72
2004.48    0.245    90.72
2005.48    0.250    89.77
2006.48    0.255    88.85
2007.48    0.261    87.98
2008.48    0.266    87.14
2009.48    0.271    86.33
2010.48    0.275    85.54
2011.48    0.280    84.79
2012.48    0.285    84.06
2013.48    0.289    83.35
2014.48    0.293    82.66
2015.48    0.298    81.99
2016.48    0.302    81.34
2017.48    0.306    80.71
2018.48    0.309    80.09
2019.48    0.313    79.49
2020.48    0.317    78.91
2021.48    0.320    78.33
2022.48    0.324    77.77
2023.48    0.327    77.22
2024.48    0.330    76.68
2025.48    0.333    76.15
2026.48    0.337    75.63
2027.48    0.339    75.12
2028.48    0.342    74.62
2029.48    0.345    74.13
2030.48    0.348    73.64
2031.48    0.350    73.16
2032.48    0.353    72.69
2033.48    0.355    72.22
2034.48    0.358    71.77
2035.48    0.360    71.31
2036.48    0.362    70.87
2037.48    0.364    70.42
2038.48    0.366    69.98
2039.48    0.368    69.55
2040.48    0.370    69.12
2041.48    0.371    68.70
2042.48    0.373    68.28
2043.48    0.375    67.86
2044.48    0.376    67.45
2045.48    0.377    67.04
2046.48    0.379    66.63
2047.48    0.380    66.22
2048.48    0.381    65.82
2049.48    0.382    65.42
2050.48    0.383    65.02
2051.48    0.384    64.63
2052.48    0.385    64.23
2053.48    0.386    63.84
2054.48    0.386    63.45
2055.48    0.387    63.06
2056.48    0.387    62.67
2057.48    0.388    62.28
2058.48    0.388    61.89
2059.48    0.389    61.51
2060.48    0.389    61.12
2061.48    0.389    60.74
2062.48    0.389    60.35
2063.48    0.389    59.97
2064.48    0.389    59.58
2065.48    0.389    59.19
2066.48    0.388    58.81
2067.48    0.388    58.42
2068.48    0.388    58.03
2069.48    0.387    57.64
2070.48    0.387    57.26
2071.48    0.386    56.86
2072.48    0.385    56.47
2073.48    0.384    56.08
2074.48    0.383    55.68
2075.48    0.382    55.29
2076.48    0.381    54.89
2077.48    0.380    54.48
2078.48    0.379    54.08
2079.48    0.378    53.67
2080.48    0.376    53.26
2081.48    0.375    52.85
2082.48    0.373    52.43
2083.48    0.372    52.01
2084.48    0.370    51.59
2085.48    0.368    51.16
2086.48    0.366    50.73
2087.48    0.364    50.29
2088.48    0.362    49.85
2089.48    0.360    49.40
2090.48    0.357    48.94
2091.48    0.355    48.48
2092.48    0.353    48.02
2093.48    0.350    47.55
2094.48    0.347    47.07
2095.48    0.345    46.58
2096.48    0.342    46.09
2097.48    0.339    45.58
2098.48    0.336    45.07
2099.48    0.332    44.55
2100.48    0.329    44.01
2101.48    0.326    43.47
2102.48    0.322    42.91
2103.48    0.319    42.35
2104.48    0.315    41.77
2105.48    0.311    41.17
2106.48    0.307    40.56
2107.48    0.303    39.93

Disclaimer

This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 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.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 17:41:49