Double Star Calculator - Orbit

Orbital Elements for A1789

WDS:	A1789	WDS ID/Discoverer
P:	143.440	Orbital period (years)
a:	0.191	Semi-major axis (arcseconds)
i:	137.8	Inclination (degrees)
Ω:	67.9	Longitude of ascending node (degrees)
T:	1962.712	Epoch of periastron passage (year)
e:	0.42	Eccentricity
ω:	105.4	Longitude of periastron (degrees)
Start-Year:	1953.28	Year
End-Year:	2096.72	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1789
Position:	133029.62+072910.1	Epoch-2000 right ascension and declination
WDS-ID:	13305+0729	WDS designation
Discoverer Code:	A1789	Discover designation and components
ADS number:	8926	Aitken Double Star catalog
HD number:	117478	HD catalog number
Hipparcos number:	65897	Hipparcos catalog number
V1:	9.14	Magnitude of the primary
V2:	9.39	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	GmJ2022	Reference

Double Star Orbit for A1789

WDS 6th Orbit including measures of A1789

-- 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 A1789

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.200   149.31
--------------------------
1953.28    0.111    28.66
1954.28    0.106    23.44
1955.28    0.100    17.63
1956.28    0.095    11.18
1957.28    0.091     4.07
1958.28    0.087   356.30
1959.28    0.085   347.94
1960.28    0.083   339.16
1961.28    0.083   330.18
1962.28    0.084   321.27
1963.28    0.086   312.67
1964.28    0.089   304.56
1965.28    0.093   297.06
1966.28    0.097   290.20
1967.28    0.102   283.96
1968.28    0.107   278.30
1969.28    0.112   273.15
1970.28    0.117   268.44
1971.28    0.122   264.12
1972.28    0.127   260.13
1973.28    0.131   256.42
1974.28    0.135   252.95
1975.28    0.139   249.68
1976.28    0.143   246.60
1977.28    0.147   243.66
1978.28    0.150   240.86
1979.28    0.153   238.18
1980.28    0.156   235.59
1981.28    0.158   233.09
1982.28    0.161   230.66
1983.28    0.163   228.31
1984.28    0.165   226.01
1985.28    0.166   223.76
1986.28    0.168   221.57
1987.28    0.170   219.41
1988.28    0.171   217.29
1989.28    0.172   215.21
1990.28    0.174   213.15
1991.28    0.175   211.12
1992.28    0.176   209.12
1993.28    0.177   207.14
1994.28    0.178   205.18
1995.28    0.179   203.24
1996.28    0.179   201.32
1997.28    0.180   199.42
1998.28    0.181   197.53
1999.28    0.182   195.65
2000.28    0.182   193.79
2001.28    0.183   191.94
2002.28    0.183   190.11
2003.28    0.184   188.29
2004.28    0.185   186.48
2005.28    0.185   184.68
2006.28    0.186   182.89
2007.28    0.187   181.12
2008.28    0.187   179.35
2009.28    0.188   177.60
2010.28    0.188   175.86
2011.28    0.189   174.13
2012.28    0.190   172.41
2013.28    0.190   170.71
2014.28    0.191   169.02
2015.28    0.192   167.33
2016.28    0.192   165.66
2017.28    0.193   164.01
2018.28    0.194   162.36
2019.28    0.195   160.73
2020.28    0.195   159.11
2021.28    0.196   157.50
2022.28    0.197   155.90
2023.28    0.198   154.32
2024.28    0.198   152.75
2025.28    0.199   151.19
2026.28    0.200   149.65
2027.28    0.201   148.11
2028.28    0.202   146.59
2029.28    0.202   145.08
2030.28    0.203   143.59
2031.28    0.204   142.10
2032.28    0.205   140.63
2033.28    0.206   139.17
2034.28    0.207   137.72
2035.28    0.207   136.29
2036.28    0.208   134.86
2037.28    0.209   133.44
2038.28    0.210   132.04
2039.28    0.210   130.64
2040.28    0.211   129.26
2041.28    0.212   127.88
2042.28    0.213   126.52
2043.28    0.213   125.16
2044.28    0.214   123.81
2045.28    0.215   122.47
2046.28    0.215   121.14
2047.28    0.216   119.81
2048.28    0.216   118.49
2049.28    0.217   117.17
2050.28    0.217   115.86
2051.28    0.217   114.56
2052.28    0.218   113.26
2053.28    0.218   111.96
2054.28    0.218   110.66
2055.28    0.218   109.37
2056.28    0.218   108.08
2057.28    0.218   106.79
2058.28    0.218   105.49
2059.28    0.218   104.20
2060.28    0.218   102.90
2061.28    0.217   101.60
2062.28    0.217   100.30
2063.28    0.217    98.99
2064.28    0.216    97.67
2065.28    0.215    96.35
2066.28    0.214    95.02
2067.28    0.213    93.67
2068.28    0.212    92.32
2069.28    0.211    90.94
2070.28    0.210    89.56
2071.28    0.209    88.15
2072.28    0.207    86.73
2073.28    0.205    85.28
2074.28    0.203    83.80
2075.28    0.201    82.30
2076.28    0.199    80.77
2077.28    0.197    79.20
2078.28    0.194    77.59
2079.28    0.192    75.93
2080.28    0.189    74.23
2081.28    0.186    72.47
2082.28    0.182    70.65
2083.28    0.179    68.76
2084.28    0.175    66.79
2085.28    0.171    64.74
2086.28    0.167    62.58
2087.28    0.162    60.30
2088.28    0.158    57.90
2089.28    0.153    55.35
2090.28    0.148    52.62
2091.28    0.142    49.70
2092.28    0.137    46.55
2093.28    0.131    43.13
2094.28    0.126    39.40
2095.28    0.120    35.31
2096.28    0.114    30.80

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 16:56:50