Double Star Calculator - Orbit

Orbital Elements for A1374AB

WDS:	A1374AB	WDS ID/Discoverer
P:	139.530	Orbital period (years)
a:	0.504	Semi-major axis (arcseconds)
i:	136.7	Inclination (degrees)
Ω:	249.0	Longitude of ascending node (degrees)
T:	1995.810	Epoch of periastron passage (year)
e:	0.806	Eccentricity
ω:	76.0	Longitude of periastron (degrees)
Start-Year:	1955.235	Year
End-Year:	2094.765	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1374AB
Position:	180017.93+215347.5	Epoch-2000 right ascension and declination
WDS-ID:	18003+2154	WDS designation
Discoverer Code:	A1374AB	Discover designation and components
ADS number:	10971	Aitken Double Star catalog
HD number:	341480	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.9	Magnitude of the primary
V2:	10.9	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2015	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:	USN2017b	Reference

Double Star Orbit for A1374AB

WDS 6th Orbit including measures of A1374AB

-- 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 A1374AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.584    23.61
--------------------------
1955.23    0.581   337.76
1956.23    0.575   336.91
1957.23    0.570   336.05
1958.23    0.563   335.17
1959.23    0.557   334.27
1960.23    0.551   333.35
1961.23    0.544   332.41
1962.23    0.537   331.44
1963.23    0.530   330.45
1964.23    0.523   329.43
1965.23    0.515   328.38
1966.23    0.507   327.30
1967.23    0.500   326.19
1968.23    0.491   325.04
1969.23    0.483   323.85
1970.23    0.475   322.62
1971.23    0.466   321.34
1972.23    0.457   320.01
1973.23    0.447   318.63
1974.23    0.438   317.19
1975.23    0.428   315.68
1976.23    0.418   314.10
1977.23    0.407   312.44
1978.23    0.396   310.69
1979.23    0.385   308.84
1980.23    0.373   306.87
1981.23    0.361   304.78
1982.23    0.349   302.54
1983.23    0.336   300.13
1984.23    0.322   297.51
1985.23    0.308   294.67
1986.23    0.293   291.54
1987.23    0.277   288.06
1988.23    0.260   284.15
1989.23    0.242   279.68
1990.23    0.223   274.45
1991.23    0.201   268.15
1992.23    0.177   260.23
1993.23    0.149   249.56
1994.23    0.117   233.48
1995.23    0.085   204.77
1996.23    0.073   154.85
1997.23    0.098   112.99
1998.23    0.136    91.73
1999.23    0.172    79.73
2000.23    0.206    71.79
2001.23    0.235    65.98
2002.23    0.263    61.42
2003.23    0.287    57.68
2004.23    0.310    54.51
2005.23    0.331    51.76
2006.23    0.351    49.33
2007.23    0.369    47.15
2008.23    0.386    45.16
2009.23    0.402    43.35
2010.23    0.418    41.67
2011.23    0.432    40.10
2012.23    0.446    38.63
2013.23    0.459    37.25
2014.23    0.471    35.95
2015.23    0.483    34.71
2016.23    0.494    33.52
2017.23    0.505    32.39
2018.23    0.515    31.31
2019.23    0.525    30.26
2020.23    0.534    29.26
2021.23    0.543    28.28
2022.23    0.552    27.34
2023.23    0.560    26.43
2024.23    0.568    25.54
2025.23    0.575    24.68
2026.23    0.582    23.83
2027.23    0.589    23.01
2028.23    0.596    22.21
2029.23    0.602    21.42
2030.23    0.608    20.65
2031.23    0.614    19.89
2032.23    0.619    19.15
2033.23    0.624    18.42
2034.23    0.629    17.70
2035.23    0.634    16.99
2036.23    0.638    16.29
2037.23    0.642    15.60
2038.23    0.646    14.92
2039.23    0.650    14.25
2040.23    0.653    13.58
2041.23    0.657    12.93
2042.23    0.660    12.27
2043.23    0.663    11.63
2044.23    0.665    10.99
2045.23    0.668    10.35
2046.23    0.670     9.72
2047.23    0.672     9.09
2048.23    0.674     8.47
2049.23    0.676     7.85
2050.23    0.677     7.23
2051.23    0.679     6.62
2052.23    0.680     6.01
2053.23    0.681     5.40
2054.23    0.682     4.79
2055.23    0.682     4.18
2056.23    0.683     3.58
2057.23    0.683     2.97
2058.23    0.683     2.37
2059.23    0.683     1.76
2060.23    0.683     1.16
2061.23    0.683     0.55
2062.23    0.682   359.94
2063.23    0.682   359.34
2064.23    0.681   358.73
2065.23    0.680   358.12
2066.23    0.679   357.51
2067.23    0.677   356.89
2068.23    0.676   356.28
2069.23    0.674   355.66
2070.23    0.673   355.03
2071.23    0.671   354.41
2072.23    0.669   353.78
2073.23    0.666   353.15
2074.23    0.664   352.51
2075.23    0.662   351.87
2076.23    0.659   351.22
2077.23    0.656   350.56
2078.23    0.653   349.91
2079.23    0.650   349.24
2080.23    0.647   348.57
2081.23    0.643   347.89
2082.23    0.640   347.20
2083.23    0.636   346.51
2084.23    0.632   345.81
2085.23    0.628   345.10
2086.23    0.624   344.38
2087.23    0.619   343.65
2088.23    0.615   342.90
2089.23    0.610   342.15
2090.23    0.605   341.39
2091.23    0.600   340.61
2092.23    0.595   339.82
2093.23    0.590   339.02
2094.23    0.584   338.20

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 17:46:12