Double Star Calculator - Orbit

Orbital Elements for B872

WDS:	B872	WDS ID/Discoverer
P:	179.400	Orbital period (years)
a:	0.398	Semi-major axis (arcseconds)
i:	108.6	Inclination (degrees)
Ω:	132.9	Longitude of ascending node (degrees)
T:	1977.700	Epoch of periastron passage (year)
e:	0.508	Eccentricity
ω:	146.3	Longitude of periastron (degrees)
Start-Year:	1935.3	Year
End-Year:	2114.7	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B872
Position:	162726.22-372837.0	Epoch-2000 right ascension and declination
WDS-ID:	16274-3729	WDS designation
Discoverer Code:	B872	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	148121	HD catalog number
Hipparcos number:	80603	Hipparcos catalog number
V1:	9.33	Magnitude of the primary
V2:	9.68	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2020g	Reference

Double Star Orbit for B872

WDS 6th Orbit including measures of B872

-- 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 B872

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.239   171.92
--------------------------
1935.30    0.469   130.20
1936.30    0.462   129.80
1937.30    0.455   129.39
1938.30    0.448   128.96
1939.30    0.440   128.51
1940.30    0.431   128.05
1941.30    0.423   127.58
1942.30    0.414   127.08
1943.30    0.404   126.55
1944.30    0.395   126.01
1945.30    0.385   125.43
1946.30    0.374   124.83
1947.30    0.363   124.18
1948.30    0.352   123.50
1949.30    0.340   122.77
1950.30    0.328   121.99
1951.30    0.316   121.15
1952.30    0.303   120.23
1953.30    0.290   119.24
1954.30    0.276   118.15
1955.30    0.262   116.94
1956.30    0.247   115.59
1957.30    0.232   114.07
1958.30    0.217   112.34
1959.30    0.202   110.34
1960.30    0.186   108.01
1961.30    0.170   105.24
1962.30    0.154   101.89
1963.30    0.138    97.76
1964.30    0.122    92.57
1965.30    0.107    85.90
1966.30    0.094    77.22
1967.30    0.083    65.96
1968.30    0.076    51.91
1969.30    0.073    35.90
1970.30    0.076    19.95
1971.30    0.083     6.04
1972.30    0.094   354.88
1973.30    0.107   346.23
1974.30    0.121   339.50
1975.30    0.135   334.17
1976.30    0.149   329.83
1977.30    0.162   326.21
1978.30    0.173   323.10
1979.30    0.184   320.36
1980.30    0.193   317.90
1981.30    0.200   315.65
1982.30    0.206   313.53
1983.30    0.210   311.52
1984.30    0.213   309.57
1985.30    0.215   307.67
1986.30    0.215   305.77
1987.30    0.214   303.87
1988.30    0.212   301.94
1989.30    0.209   299.96
1990.30    0.205   297.92
1991.30    0.201   295.80
1992.30    0.196   293.58
1993.30    0.190   291.23
1994.30    0.185   288.75
1995.30    0.179   286.11
1996.30    0.173   283.29
1997.30    0.167   280.26
1998.30    0.161   277.02
1999.30    0.155   273.53
2000.30    0.150   269.78
2001.30    0.145   265.77
2002.30    0.140   261.48
2003.30    0.137   256.92
2004.30    0.133   252.12
2005.30    0.131   247.11
2006.30    0.129   241.95
2007.30    0.129   236.69
2008.30    0.129   231.41
2009.30    0.130   226.18
2010.30    0.132   221.08
2011.30    0.135   216.17
2012.30    0.139   211.50
2013.30    0.143   207.10
2014.30    0.148   202.98
2015.30    0.154   199.14
2016.30    0.160   195.60
2017.30    0.167   192.33
2018.30    0.174   189.31
2019.30    0.181   186.53
2020.30    0.189   183.97
2021.30    0.196   181.62
2022.30    0.204   179.44
2023.30    0.212   177.43
2024.30    0.221   175.56
2025.30    0.229   173.83
2026.30    0.237   172.22
2027.30    0.246   170.72
2028.30    0.254   169.32
2029.30    0.262   168.01
2030.30    0.271   166.78
2031.30    0.279   165.62
2032.30    0.287   164.53
2033.30    0.295   163.50
2034.30    0.304   162.53
2035.30    0.312   161.61
2036.30    0.320   160.73
2037.30    0.328   159.89
2038.30    0.335   159.10
2039.30    0.343   158.34
2040.30    0.351   157.62
2041.30    0.358   156.92
2042.30    0.366   156.26
2043.30    0.373   155.62
2044.30    0.381   155.00
2045.30    0.388   154.41
2046.30    0.395   153.84
2047.30    0.402   153.29
2048.30    0.408   152.76
2049.30    0.415   152.24
2050.30    0.421   151.74
2051.30    0.428   151.26
2052.30    0.434   150.79
2053.30    0.440   150.33
2054.30    0.446   149.89
2055.30    0.452   149.45
2056.30    0.458   149.03
2057.30    0.463   148.62
2058.30    0.469   148.22
2059.30    0.474   147.82
2060.30    0.479   147.44
2061.30    0.484   147.06
2062.30    0.489   146.69
2063.30    0.493   146.33
2064.30    0.498   145.97
2065.30    0.502   145.62
2066.30    0.506   145.28
2067.30    0.510   144.94
2068.30    0.514   144.61
2069.30    0.518   144.28
2070.30    0.521   143.96
2071.30    0.524   143.64
2072.30    0.527   143.32
2073.30    0.530   143.01
2074.30    0.533   142.70
2075.30    0.536   142.40
2076.30    0.538   142.09
2077.30    0.541   141.79
2078.30    0.543   141.49
2079.30    0.544   141.20
2080.30    0.546   140.91
2081.30    0.548   140.61
2082.30    0.549   140.32
2083.30    0.550   140.03
2084.30    0.551   139.75
2085.30    0.552   139.46
2086.30    0.552   139.17
2087.30    0.553   138.89
2088.30    0.553   138.60
2089.30    0.553   138.31
2090.30    0.552   138.03
2091.30    0.552   137.74
2092.30    0.551   137.45
2093.30    0.550   137.17
2094.30    0.549   136.88
2095.30    0.547   136.59
2096.30    0.546   136.29
2097.30    0.544   136.00
2098.30    0.542   135.70
2099.30    0.539   135.40
2100.30    0.537   135.10
2101.30    0.534   134.80
2102.30    0.531   134.49
2103.30    0.527   134.18
2104.30    0.524   133.86
2105.30    0.520   133.54
2106.30    0.516   133.21
2107.30    0.511   132.88
2108.30    0.506   132.55
2109.30    0.501   132.20
2110.30    0.496   131.85
2111.30    0.491   131.49
2112.30    0.485   131.12
2113.30    0.479   130.75
2114.30    0.472   130.36

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 17:26:45