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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:29:34

Orbital Elements for A1913AB

WDS:	A1913AB	WDS ID/Discoverer
P:	275.500	Orbital period (years)
a:	0.33	Semi-major axis (arcseconds)
i:	111.2	Inclination (degrees)
Ω:	117.2	Longitude of ascending node (degrees)
T:	2088.900	Epoch of periastron passage (year)
e:	0.188	Eccentricity
ω:	94.3	Longitude of periastron (degrees)
Start-Year:	1888.0	Year
End-Year:	2162.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1913AB

Position:	013429.69+343939.5	Epoch-2000 right ascension and declination
WDS-ID:	01345+3440	WDS designation
Discoverer Code:	A1913AB	Discover designation and components
ADS number:	1227	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	7337	Hipparcos catalog number
V1:	10.46	Magnitude of the primary
V2:	10.68	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1991	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for A1913AB

WDS 6th Orbit including measures of A1913AB

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

Ephemeris of A1913AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.330    121.1
-------------------------
1888.0     0.303    284.4
1889.0     0.301    283.9
1890.0     0.299    283.3
1891.0     0.297    282.7
1892.0     0.294    282.2
1893.0     0.292    281.6
1894.0     0.289    281.0
1895.0     0.286    280.4
1896.0     0.284    279.7
1897.0     0.281    279.1
1898.0     0.278    278.5
1899.0     0.275    277.8
1900.0     0.272    277.1
1901.0     0.269    276.4
1902.0     0.266    275.7
1903.0     0.262    275.0
1904.0     0.259    274.3
1905.0     0.256    273.5
1906.0     0.252    272.7
1907.0     0.249    271.9
1908.0     0.245    271.1
1909.0     0.242    270.2
1910.0     0.238    269.4
1911.0     0.235    268.4
1912.0     0.231    267.5
1913.0     0.228    266.6
1914.0     0.224    265.6
1915.0     0.220    264.5
1916.0     0.217    263.5
1917.0     0.213    262.4
1918.0     0.209    261.2
1919.0     0.206    260.1
1920.0     0.202    258.9
1921.0     0.198    257.6
1922.0     0.195    256.3
1923.0     0.191    254.9
1924.0     0.188    253.5
1925.0     0.185    252.1
1926.0     0.181    250.6
1927.0     0.178    249.0
1928.0     0.175    247.4
1929.0     0.172    245.7
1930.0     0.169    243.9
1931.0     0.166    242.1
1932.0     0.163    240.2
1933.0     0.160    238.3
1934.0     0.158    236.3
1935.0     0.155    234.2
1936.0     0.153    232.1
1937.0     0.151    229.9
1938.0     0.149    227.7
1939.0     0.148    225.4
1940.0     0.146    223.1
1941.0     0.145    220.7
1942.0     0.144    218.2
1943.0     0.143    215.8
1944.0     0.142    213.3
1945.0     0.142    210.8
1946.0     0.142    208.3
1947.0     0.142    205.7
1948.0     0.142    203.2
1949.0     0.143    200.7
1950.0     0.143    198.3
1951.0     0.144    195.8
1952.0     0.145    193.4
1953.0     0.147    191.0
1954.0     0.148    188.7
1955.0     0.150    186.4
1956.0     0.152    184.2
1957.0     0.154    182.1
1958.0     0.157    180.0
1959.0     0.159    178.0
1960.0     0.162    176.0
1961.0     0.164    174.1
1962.0     0.167    172.2
1963.0     0.170    170.5
1964.0     0.173    168.7
1965.0     0.176    167.1
1966.0     0.180    165.5
1967.0     0.183    164.0
1968.0     0.186    162.5
1969.0     0.190    161.0
1970.0     0.193    159.7
1971.0     0.197    158.3
1972.0     0.200    157.1
1973.0     0.204    155.8
1974.0     0.208    154.6
1975.0     0.211    153.5
1976.0     0.215    152.4
1977.0     0.219    151.3
1978.0     0.222    150.3
1979.0     0.226    149.2
1980.0     0.230    148.3
1981.0     0.234    147.3
1982.0     0.237    146.4
1983.0     0.241    145.5
1984.0     0.244    144.7
1985.0     0.248    143.8
1986.0     0.252    143.0
1987.0     0.255    142.2
1988.0     0.259    141.5
1989.0     0.262    140.7
1990.0     0.265    140.0
1991.0     0.269    139.3
1992.0     0.272    138.6
1993.0     0.275    137.9
1994.0     0.278    137.3
1995.0     0.281    136.6
1996.0     0.284    136.0
1997.0     0.287    135.4
1998.0     0.290    134.8
1999.0     0.293    134.2
2000.0     0.296    133.6
2001.0     0.298    133.0
2002.0     0.301    132.5
2003.0     0.303    131.9
2004.0     0.306    131.4
2005.0     0.308    130.8
2006.0     0.310    130.3
2007.0     0.312    129.8
2008.0     0.314    129.2
2009.0     0.316    128.7
2010.0     0.318    128.2
2011.0     0.319    127.7
2012.0     0.321    127.2
2013.0     0.322    126.8
2014.0     0.324    126.3
2015.0     0.325    125.8
2016.0     0.326    125.3
2017.0     0.327    124.8
2018.0     0.328    124.4
2019.0     0.328    123.9
2020.0     0.329    123.4
2021.0     0.329    123.0
2022.0     0.330    122.5
2023.0     0.330    122.0
2024.0     0.330    121.6
2025.0     0.330    121.1
2026.0     0.329    120.6
2027.0     0.329    120.2
2028.0     0.328    119.7
2029.0     0.328    119.2
2030.0     0.327    118.8
2031.0     0.326    118.3
2032.0     0.325    117.8
2033.0     0.323    117.3
2034.0     0.322    116.8
2035.0     0.320    116.3
2036.0     0.318    115.8
2037.0     0.316    115.3
2038.0     0.314    114.8
2039.0     0.312    114.3
2040.0     0.310    113.8
2041.0     0.307    113.3
2042.0     0.304    112.7
2043.0     0.301    112.2
2044.0     0.298    111.6
2045.0     0.295    111.0
2046.0     0.292    110.5
2047.0     0.288    109.9
2048.0     0.284    109.2
2049.0     0.280    108.6
2050.0     0.276    107.9
2051.0     0.272    107.3
2052.0     0.268    106.6
2053.0     0.263    105.9
2054.0     0.259    105.1
2055.0     0.254    104.4
2056.0     0.249    103.6
2057.0     0.244    102.7
2058.0     0.239    101.9
2059.0     0.233    100.9
2060.0     0.228    100.0
2061.0     0.222     99.0
2062.0     0.217     97.9
2063.0     0.211     96.8
2064.0     0.205     95.7
2065.0     0.199     94.4
2066.0     0.193     93.1
2067.0     0.187     91.7
2068.0     0.181     90.2
2069.0     0.175     88.6
2070.0     0.168     86.9
2071.0     0.162     85.0
2072.0     0.156     83.0
2073.0     0.150     80.9
2074.0     0.144     78.5
2075.0     0.138     76.0
2076.0     0.133     73.2
2077.0     0.127     70.3
2078.0     0.122     67.0
2079.0     0.117     63.5
2080.0     0.113     59.6
2081.0     0.109     55.5
2082.0     0.105     51.1
2083.0     0.102     46.4
2084.0     0.100     41.4
2085.0     0.098     36.2
2086.0     0.097     30.9
2087.0     0.097     25.5
2088.0     0.098     20.2
2089.0     0.099     14.9
2090.0     0.101      9.9
2091.0     0.104      5.0
2092.0     0.107      0.4
2093.0     0.111    356.2
2094.0     0.115    352.2
2095.0     0.120    348.5
2096.0     0.125    345.1
2097.0     0.130    342.0
2098.0     0.136    339.1
2099.0     0.141    336.5
2100.0     0.147    334.1
2101.0     0.153    331.8
2102.0     0.159    329.7
2103.0     0.165    327.8
2104.0     0.171    326.0
2105.0     0.177    324.4
2106.0     0.184    322.8
2107.0     0.190    321.4
2108.0     0.196    320.0
2109.0     0.202    318.7
2110.0     0.207    317.5
2111.0     0.213    316.4
2112.0     0.219    315.3
2113.0     0.224    314.3
2114.0     0.230    313.3
2115.0     0.235    312.3
2116.0     0.240    311.4
2117.0     0.245    310.6
2118.0     0.250    309.8
2119.0     0.255    309.0
2120.0     0.259    308.2
2121.0     0.264    307.5
2122.0     0.268    306.8
2123.0     0.272    306.1
2124.0     0.276    305.4
2125.0     0.280    304.7
2126.0     0.283    304.1
2127.0     0.287    303.5
2128.0     0.290    302.9
2129.0     0.293    302.3
2130.0     0.296    301.7
2131.0     0.299    301.1
2132.0     0.302    300.6
2133.0     0.304    300.0
2134.0     0.306    299.5
2135.0     0.308    298.9
2136.0     0.310    298.4
2137.0     0.312    297.9
2138.0     0.313    297.4
2139.0     0.315    296.8
2140.0     0.316    296.3
2141.0     0.317    295.8
2142.0     0.318    295.3
2143.0     0.319    294.8
2144.0     0.319    294.3
2145.0     0.320    293.8
2146.0     0.320    293.4
2147.0     0.320    292.9
2148.0     0.320    292.4
2149.0     0.320    291.9
2150.0     0.320    291.4
2151.0     0.319    290.9
2152.0     0.319    290.4
2153.0     0.318    289.9
2154.0     0.317    289.4
2155.0     0.316    288.9
2156.0     0.315    288.4
2157.0     0.314    287.9
2158.0     0.313    287.4
2159.0     0.311    286.8
2160.0     0.310    286.3
2161.0     0.308    285.8

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.