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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:40:30

Orbital Elements for HO197AB
WDS: HO197AB WDS ID/Discoverer
P: 170.300 Orbital period (years)
a: 0.419 Semi-major axis (arcseconds)
i: 106.7 Inclination (degrees)
Ω: 120.4 Longitude of ascending node (degrees)
T: 1843.590 Epoch of periastron passage (year)
e: 0.456 Eccentricity
ω: 249.6 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 HO197AB
Position: 231125.83+381311.3 Epoch-2000 right ascension and declination
WDS-ID: 23114+3813 WDS designation
Discoverer Code: HO197AB Discover designation and components
ADS number: 16576 Aitken Double Star catalog
HD number: 218917 HD catalog number
Hipparcos number: 114504 Hipparcos catalog number
V1: 8.47 Magnitude of the primary
V2: 9.16 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2009 Date of last observation
Orbit grade: 3 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for HO197AB



WDS 6th Orbit including measures of HO197AB

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


Ephemeris of HO197AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.191    138.3
-------------------------
1940.0     0.202     62.8
1941.0     0.197     60.4
1942.0     0.192     57.9
1943.0     0.188     55.2
1944.0     0.183     52.5
1945.0     0.180     49.6
1946.0     0.176     46.6
1947.0     0.174     43.5
1948.0     0.171     40.3
1949.0     0.169     37.0
1950.0     0.168     33.6
1951.0     0.167     30.2
1952.0     0.166     26.8
1953.0     0.166     23.4
1954.0     0.167     19.9
1955.0     0.168     16.5
1956.0     0.169     13.2
1957.0     0.171      9.9
1958.0     0.173      6.7
1959.0     0.176      3.6
1960.0     0.180      0.6
1961.0     0.183    357.7
1962.0     0.187    354.9
1963.0     0.191    352.3
1964.0     0.196    349.7
1965.0     0.201    347.3
1966.0     0.206    345.0
1967.0     0.211    342.8
1968.0     0.216    340.7
1969.0     0.221    338.8
1970.0     0.227    336.9
1971.0     0.232    335.1
1972.0     0.238    333.3
1973.0     0.243    331.7
1974.0     0.249    330.1
1975.0     0.255    328.6
1976.0     0.260    327.2
1977.0     0.265    325.8
1978.0     0.270    324.5
1979.0     0.276    323.2
1980.0     0.280    322.0
1981.0     0.285    320.8
1982.0     0.290    319.7
1983.0     0.294    318.6
1984.0     0.298    317.5
1985.0     0.301    316.4
1986.0     0.305    315.4
1987.0     0.308    314.4
1988.0     0.310    313.4
1989.0     0.312    312.4
1990.0     0.314    311.4
1991.0     0.315    310.5
1992.0     0.315    309.5
1993.0     0.315    308.6
1994.0     0.315    307.6
1995.0     0.313    306.6
1996.0     0.311    305.7
1997.0     0.308    304.7
1998.0     0.304    303.7
1999.0     0.299    302.6
2000.0     0.293    301.5
2001.0     0.286    300.4
2002.0     0.278    299.2
2003.0     0.269    298.0
2004.0     0.259    296.6
2005.0     0.247    295.1
2006.0     0.235    293.5
2007.0     0.221    291.7
2008.0     0.205    289.6
2009.0     0.189    287.1
2010.0     0.172    284.2
2011.0     0.153    280.6
2012.0     0.135    276.0
2013.0     0.116    270.0
2014.0     0.099    261.7
2015.0     0.083    250.0
2016.0     0.071    233.7
2017.0     0.067    213.4
2018.0     0.071    192.9
2019.0     0.082    176.2
2020.0     0.097    164.1
2021.0     0.115    155.5
2022.0     0.134    149.4
2023.0     0.153    144.7
2024.0     0.172    141.1
2025.0     0.191    138.3
2026.0     0.210    135.9
2027.0     0.227    133.9
2028.0     0.244    132.2
2029.0     0.261    130.7
2030.0     0.276    129.4
2031.0     0.291    128.2
2032.0     0.304    127.1
2033.0     0.318    126.1
2034.0     0.330    125.2
2035.0     0.341    124.4
2036.0     0.352    123.6
2037.0     0.362    122.9
2038.0     0.372    122.2
2039.0     0.381    121.5
2040.0     0.389    120.9
2041.0     0.397    120.2
2042.0     0.404    119.6
2043.0     0.410    119.1
2044.0     0.416    118.5
2045.0     0.421    118.0
2046.0     0.426    117.4
2047.0     0.430    116.9
2048.0     0.434    116.4
2049.0     0.437    115.9
2050.0     0.440    115.4
2051.0     0.443    114.9
2052.0     0.445    114.5
2053.0     0.447    114.0
2054.0     0.448    113.5
2055.0     0.449    113.0
2056.0     0.450    112.6
2057.0     0.450    112.1
2058.0     0.450    111.6
2059.0     0.449    111.2
2060.0     0.449    110.7
2061.0     0.448    110.2
2062.0     0.446    109.7
2063.0     0.445    109.3
2064.0     0.443    108.8
2065.0     0.441    108.3
2066.0     0.439    107.8
2067.0     0.436    107.3
2068.0     0.433    106.8
2069.0     0.430    106.3
2070.0     0.427    105.8
2071.0     0.423    105.3
2072.0     0.420    104.7
2073.0     0.416    104.2
2074.0     0.412    103.6
2075.0     0.407    103.1
2076.0     0.403    102.5
2077.0     0.398    101.9
2078.0     0.394    101.3
2079.0     0.389    100.7
2080.0     0.384    100.0
2081.0     0.378     99.4
2082.0     0.373     98.7
2083.0     0.368     98.0
2084.0     0.362     97.3
2085.0     0.356     96.6
2086.0     0.351     95.8
2087.0     0.345     95.0
2088.0     0.339     94.2
2089.0     0.333     93.4
2090.0     0.326     92.5
2091.0     0.320     91.6
2092.0     0.314     90.6
2093.0     0.308     89.6
2094.0     0.301     88.6
2095.0     0.295     87.5
2096.0     0.288     86.4
2097.0     0.282     85.3
2098.0     0.275     84.0
2099.0     0.269     82.8
2100.0     0.263     81.4
2101.0     0.256     80.0
2102.0     0.250     78.5
2103.0     0.244     77.0
2104.0     0.237     75.3
2105.0     0.231     73.6
2106.0     0.225     71.8
2107.0     0.220     69.9
2108.0     0.214     67.8
2109.0     0.208     65.7






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 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.


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