Double Star Calculator - Orbit

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:	1939.65	Year
End-Year:	2110.35	Year
Epoch:	2026.5	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 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Ary2015b	Reference

Double Star Orbit for SLR1AB

WDS 6th Orbit including measures of SLR1AB

-- 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 SLR1AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.789    61.47
--------------------------
1939.65    1.358   355.97
1940.65    1.354   355.40
1941.65    1.351   354.81
1942.65    1.347   354.23
1943.65    1.342   353.64
1944.65    1.338   353.05
1945.65    1.333   352.45
1946.65    1.328   351.85
1947.65    1.322   351.25
1948.65    1.316   350.64
1949.65    1.310   350.02
1950.65    1.304   349.40
1951.65    1.297   348.77
1952.65    1.290   348.13
1953.65    1.282   347.49
1954.65    1.274   346.84
1955.65    1.266   346.18
1956.65    1.258   345.52
1957.65    1.249   344.84
1958.65    1.239   344.15
1959.65    1.230   343.45
1960.65    1.220   342.75
1961.65    1.209   342.03
1962.65    1.198   341.29
1963.65    1.187   340.54
1964.65    1.175   339.78
1965.65    1.163   339.00
1966.65    1.150   338.21
1967.65    1.137   337.40
1968.65    1.123   336.56
1969.65    1.109   335.71
1970.65    1.094   334.84
1971.65    1.079   333.94
1972.65    1.063   333.01
1973.65    1.047   332.05
1974.65    1.030   331.07
1975.65    1.012   330.05
1976.65    0.994   328.99
1977.65    0.975   327.89
1978.65    0.955   326.75
1979.65    0.934   325.56
1980.65    0.913   324.32
1981.65    0.891   323.01
1982.65    0.868   321.64
1983.65    0.844   320.19
1984.65    0.819   318.65
1985.65    0.794   317.02
1986.65    0.767   315.27
1987.65    0.738   313.39
1988.65    0.709   311.36
1989.65    0.678   309.16
1990.65    0.646   306.73
1991.65    0.613   304.05
1992.65    0.578   301.05
1993.65    0.541   297.66
1994.65    0.503   293.76
1995.65    0.463   289.19
1996.65    0.421   283.75
1997.65    0.379   277.09
1998.65    0.336   268.73
1999.65    0.294   257.96
2000.65    0.258   243.88
2001.65    0.231   225.83
2002.65    0.220   204.61
2003.65    0.228   183.17
2004.65    0.251   164.49
2005.65    0.283   149.48
2006.65    0.316   137.59
2007.65    0.350   128.00
2008.65    0.383   120.07
2009.65    0.413   113.35
2010.65    0.443   107.55
2011.65    0.471   102.45
2012.65    0.497    97.91
2013.65    0.523    93.82
2014.65    0.547    90.11
2015.65    0.571    86.71
2016.65    0.594    83.57
2017.65    0.616    80.66
2018.65    0.637    77.96
2019.65    0.658    75.42
2020.65    0.679    73.05
2021.65    0.698    70.80
2022.65    0.718    68.68
2023.65    0.737    66.68
2024.65    0.755    64.77
2025.65    0.773    62.95
2026.65    0.791    61.21
2027.65    0.809    59.55
2028.65    0.826    57.96
2029.65    0.842    56.43
2030.65    0.859    54.96
2031.65    0.875    53.54
2032.65    0.890    52.18
2033.65    0.906    50.86
2034.65    0.921    49.59
2035.65    0.935    48.35
2036.65    0.950    47.16
2037.65    0.964    46.00
2038.65    0.978    44.87
2039.65    0.992    43.77
2040.65    1.005    42.71
2041.65    1.018    41.67
2042.65    1.031    40.66
2043.65    1.044    39.67
2044.65    1.056    38.71
2045.65    1.068    37.76
2046.65    1.080    36.84
2047.65    1.091    35.94
2048.65    1.103    35.06
2049.65    1.114    34.19
2050.65    1.125    33.34
2051.65    1.135    32.51
2052.65    1.146    31.69
2053.65    1.156    30.89
2054.65    1.166    30.10
2055.65    1.176    29.33
2056.65    1.185    28.57
2057.65    1.194    27.81
2058.65    1.203    27.07
2059.65    1.212    26.35
2060.65    1.220    25.63
2061.65    1.229    24.92
2062.65    1.237    24.22
2063.65    1.245    23.53
2064.65    1.252    22.85
2065.65    1.260    22.17
2066.65    1.267    21.51
2067.65    1.274    20.85
2068.65    1.281    20.20
2069.65    1.287    19.55
2070.65    1.293    18.91
2071.65    1.300    18.28
2072.65    1.305    17.66
2073.65    1.311    17.04
2074.65    1.316    16.42
2075.65    1.322    15.81
2076.65    1.327    15.20
2077.65    1.331    14.60
2078.65    1.336    14.00
2079.65    1.340    13.41
2080.65    1.344    12.82
2081.65    1.348    12.23
2082.65    1.352    11.65
2083.65    1.355    11.07
2084.65    1.358    10.49
2085.65    1.361     9.92
2086.65    1.364     9.34
2087.65    1.366     8.77
2088.65    1.369     8.21
2089.65    1.371     7.64
2090.65    1.372     7.07
2091.65    1.374     6.51
2092.65    1.375     5.95
2093.65    1.376     5.39
2094.65    1.377     4.83
2095.65    1.378     4.27
2096.65    1.378     3.71
2097.65    1.378     3.15
2098.65    1.378     2.59
2099.65    1.378     2.03
2100.65    1.377     1.47
2101.65    1.376     0.91
2102.65    1.375     0.35
2103.65    1.374   359.78
2104.65    1.372   359.22
2105.65    1.370   358.66
2106.65    1.368   358.09
2107.65    1.366   357.52
2108.65    1.363   356.95
2109.65    1.360   356.38

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 14:47:15