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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:26:06

Orbital Elements for SLR1AB

WDS:	SLR1AB	WDS ID/Discoverer
P:	170.700	Orbital period (years)
a:	0.946	Semi-major axis (arcseconds)
i:	144.0	Inclination (degrees)
Ω:	126.4	Longitude of ascending node (degrees)
T:	2003.410	Epoch of periastron passage (year)
e:	0.718	Eccentricity
ω:	293.5	Longitude of periastron (degrees)
Start-Year:	1940.0	Year
End-Year:	2110.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for SLR1AB

Position:	010605.10-464306.4	Epoch-2000 right ascension and declination
WDS-ID:	01061-4643	WDS designation
Discoverer Code:	SLR1AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	6595	HD catalog number
Hipparcos number:	5165	Hipparcos catalog number
V1:	4.10	Magnitude of the primary
V2:	4.19	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2013	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for SLR1AB

WDS 6th Orbit including measures of SLR1AB

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

Ephemeris of SLR1AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.762     64.1
-------------------------
1940.0     1.357    355.8
1941.0     1.353    355.2
1942.0     1.349    354.6
1943.0     1.345    354.0
1944.0     1.341    353.4
1945.0     1.336    352.8
1946.0     1.331    352.2
1947.0     1.326    351.6
1948.0     1.320    351.0
1949.0     1.314    350.4
1950.0     1.308    349.8
1951.0     1.301    349.2
1952.0     1.294    348.5
1953.0     1.287    347.9
1954.0     1.279    347.3
1955.0     1.272    346.6
1956.0     1.263    346.0
1957.0     1.255    345.3
1958.0     1.245    344.6
1959.0     1.236    343.9
1960.0     1.226    343.2
1961.0     1.216    342.5
1962.0     1.205    341.8
1963.0     1.194    341.0
1964.0     1.183    340.3
1965.0     1.171    339.5
1966.0     1.158    338.7
1967.0     1.145    337.9
1968.0     1.132    337.1
1969.0     1.118    336.3
1970.0     1.104    335.4
1971.0     1.089    334.5
1972.0     1.073    333.6
1973.0     1.057    332.7
1974.0     1.041    331.7
1975.0     1.024    330.7
1976.0     1.006    329.7
1977.0     0.987    328.6
1978.0     0.968    327.5
1979.0     0.948    326.3
1980.0     0.927    325.1
1981.0     0.906    323.9
1982.0     0.883    322.5
1983.0     0.860    321.1
1984.0     0.836    319.7
1985.0     0.810    318.1
1986.0     0.784    316.4
1987.0     0.757    314.6
1988.0     0.728    312.7
1989.0     0.699    310.6
1990.0     0.667    308.3
1991.0     0.635    305.8
1992.0     0.601    303.0
1993.0     0.565    299.9
1994.0     0.528    296.4
1995.0     0.489    292.2
1996.0     0.449    287.4
1997.0     0.407    281.6
1998.0     0.364    274.4
1999.0     0.321    265.3
2000.0     0.281    253.5
2001.0     0.247    238.0
2002.0     0.225    218.6
2003.0     0.221    196.9
2004.0     0.235    176.2
2005.0     0.262    158.8
2006.0     0.294    145.0
2007.0     0.328    134.0
2008.0     0.362    125.1
2009.0     0.394    117.6
2010.0     0.424    111.2
2011.0     0.453    105.7
2012.0     0.480    100.8
2013.0     0.506     96.4
2014.0     0.531     92.5
2015.0     0.556     88.9
2016.0     0.579     85.6
2017.0     0.601     82.5
2018.0     0.623     79.7
2019.0     0.645     77.1
2020.0     0.665     74.6
2021.0     0.686     72.2
2022.0     0.705     70.0
2023.0     0.725     68.0
2024.0     0.743     66.0
2025.0     0.762     64.1
2026.0     0.780     62.3
2027.0     0.797     60.6
2028.0     0.815     59.0
2029.0     0.831     57.4
2030.0     0.848     55.9
2031.0     0.864     54.5
2032.0     0.880     53.1
2033.0     0.896     51.7
2034.0     0.911     50.4
2035.0     0.926     49.2
2036.0     0.941     47.9
2037.0     0.955     46.7
2038.0     0.969     45.6
2039.0     0.983     44.5
2040.0     0.996     43.4
2041.0     1.010     42.3
2042.0     1.023     41.3
2043.0     1.036     40.3
2044.0     1.048     39.3
2045.0     1.060     38.4
2046.0     1.072     37.4
2047.0     1.084     36.5
2048.0     1.095     35.6
2049.0     1.107     34.8
2050.0     1.118     33.9
2051.0     1.129     33.1
2052.0     1.139     32.2
2053.0     1.149     31.4
2054.0     1.159     30.6
2055.0     1.169     29.8
2056.0     1.179     29.1
2057.0     1.188     28.3
2058.0     1.197     27.6
2059.0     1.206     26.8
2060.0     1.215     26.1
2061.0     1.223     25.4
2062.0     1.232     24.7
2063.0     1.240     24.0
2064.0     1.247     23.3
2065.0     1.255     22.6
2066.0     1.262     21.9
2067.0     1.269     21.3
2068.0     1.276     20.6
2069.0     1.283     20.0
2070.0     1.289     19.3
2071.0     1.296     18.7
2072.0     1.302     18.1
2073.0     1.307     17.4
2074.0     1.313     16.8
2075.0     1.318     16.2
2076.0     1.323     15.6
2077.0     1.328     15.0
2078.0     1.333     14.4
2079.0     1.337     13.8
2080.0     1.342     13.2
2081.0     1.346     12.6
2082.0     1.349     12.0
2083.0     1.353     11.4
2084.0     1.356     10.9
2085.0     1.359     10.3
2086.0     1.362      9.7
2087.0     1.365      9.1
2088.0     1.367      8.6
2089.0     1.369      8.0
2090.0     1.371      7.4
2091.0     1.373      6.9
2092.0     1.375      6.3
2093.0     1.376      5.8
2094.0     1.377      5.2
2095.0     1.378      4.6
2096.0     1.378      4.1
2097.0     1.378      3.5
2098.0     1.378      3.0
2099.0     1.378      2.4
2100.0     1.378      1.8
2101.0     1.377      1.3
2102.0     1.376      0.7
2103.0     1.375      0.2
2104.0     1.373    359.6
2105.0     1.372    359.0
2106.0     1.370    358.5
2107.0     1.367    357.9
2108.0     1.365    357.3
2109.0     1.362    356.7

Disclaimer

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.