Double Star Calculator - Orbit

Orbital Elements for B2009

WDS:	B2009	WDS ID/Discoverer
P:	143.400	Orbital period (years)
a:	0.278	Semi-major axis (arcseconds)
i:	140.0	Inclination (degrees)
Ω:	113.5	Longitude of ascending node (degrees)
T:	1971.480	Epoch of periastron passage (year)
e:	0.239	Eccentricity
ω:	118.5	Longitude of periastron (degrees)
Start-Year:	1953.3	Year
End-Year:	2096.7	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B2009
Position:	111248.95-740139.7	Epoch-2000 right ascension and declination
WDS-ID:	11128-7402	WDS designation
Discoverer Code:	B2009	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	97708	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.8	Magnitude of the primary
V2:	10.2	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Tok2023a	Reference

Double Star Orbit for B2009

WDS 6th Orbit including measures of B2009

-- 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 B2009

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.255   201.67
--------------------------
1953.30    0.212    72.20
1954.30    0.206    68.89
1955.30    0.201    65.40
1956.30    0.195    61.71
1957.30    0.190    57.82
1958.30    0.185    53.73
1959.30    0.181    49.42
1960.30    0.177    44.90
1961.30    0.173    40.19
1962.30    0.170    35.29
1963.30    0.168    30.24
1964.30    0.166    25.07
1965.30    0.165    19.82
1966.30    0.165    14.53
1967.30    0.166     9.25
1968.30    0.167     4.02
1969.30    0.169   358.89
1970.30    0.171   353.88
1971.30    0.174   349.03
1972.30    0.177   344.35
1973.30    0.181   339.86
1974.30    0.185   335.55
1975.30    0.189   331.44
1976.30    0.194   327.51
1977.30    0.198   323.75
1978.30    0.203   320.16
1979.30    0.207   316.72
1980.30    0.211   313.42
1981.30    0.215   310.25
1982.30    0.219   307.19
1983.30    0.223   304.24
1984.30    0.227   301.39
1985.30    0.230   298.61
1986.30    0.233   295.92
1987.30    0.236   293.28
1988.30    0.238   290.71
1989.30    0.240   288.18
1990.30    0.242   285.70
1991.30    0.244   283.26
1992.30    0.245   280.85
1993.30    0.247   278.47
1994.30    0.248   276.11
1995.30    0.249   273.77
1996.30    0.249   271.44
1997.30    0.250   269.12
1998.30    0.250   266.82
1999.30    0.250   264.51
2000.30    0.251   262.22
2001.30    0.251   259.92
2002.30    0.251   257.62
2003.30    0.250   255.32
2004.30    0.250   253.02
2005.30    0.250   250.71
2006.30    0.250   248.40
2007.30    0.249   246.08
2008.30    0.249   243.76
2009.30    0.249   241.43
2010.30    0.249   239.10
2011.30    0.248   236.77
2012.30    0.248   234.43
2013.30    0.248   232.09
2014.30    0.248   229.74
2015.30    0.248   227.40
2016.30    0.248   225.06
2017.30    0.249   222.72
2018.30    0.249   220.39
2019.30    0.249   218.06
2020.30    0.250   215.75
2021.30    0.250   213.44
2022.30    0.251   211.14
2023.30    0.252   208.86
2024.30    0.253   206.59
2025.30    0.254   204.34
2026.30    0.255   202.11
2027.30    0.256   199.90
2028.30    0.257   197.71
2029.30    0.259   195.54
2030.30    0.260   193.40
2031.30    0.262   191.28
2032.30    0.263   189.19
2033.30    0.265   187.12
2034.30    0.267   185.08
2035.30    0.269   183.07
2036.30    0.271   181.09
2037.30    0.273   179.13
2038.30    0.274   177.20
2039.30    0.276   175.30
2040.30    0.278   173.42
2041.30    0.280   171.58
2042.30    0.282   169.75
2043.30    0.284   167.96
2044.30    0.286   166.19
2045.30    0.288   164.44
2046.30    0.290   162.72
2047.30    0.292   161.02
2048.30    0.294   159.34
2049.30    0.296   157.68
2050.30    0.298   156.04
2051.30    0.299   154.42
2052.30    0.301   152.82
2053.30    0.303   151.24
2054.30    0.304   149.67
2055.30    0.305   148.12
2056.30    0.307   146.58
2057.30    0.308   145.05
2058.30    0.309   143.53
2059.30    0.310   142.02
2060.30    0.311   140.52
2061.30    0.311   139.03
2062.30    0.312   137.54
2063.30    0.312   136.06
2064.30    0.312   134.58
2065.30    0.312   133.10
2066.30    0.312   131.62
2067.30    0.312   130.13
2068.30    0.311   128.65
2069.30    0.311   127.15
2070.30    0.310   125.65
2071.30    0.309   124.14
2072.30    0.307   122.62
2073.30    0.306   121.09
2074.30    0.304   119.54
2075.30    0.302   117.97
2076.30    0.300   116.38
2077.30    0.298   114.76
2078.30    0.295   113.12
2079.30    0.292   111.45
2080.30    0.289   109.75
2081.30    0.286   108.01
2082.30    0.283   106.22
2083.30    0.279   104.39
2084.30    0.275   102.51
2085.30    0.271   100.57
2086.30    0.267    98.58
2087.30    0.262    96.51
2088.30    0.257    94.37
2089.30    0.252    92.14
2090.30    0.247    89.83
2091.30    0.242    87.41
2092.30    0.236    84.89
2093.30    0.231    82.24
2094.30    0.225    79.47
2095.30    0.220    76.55
2096.30    0.214    73.48

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 16:34:55