Double Star Calculator - Orbit

Orbital Elements for HU197

WDS:	HU197	WDS ID/Discoverer
P:	135.400	Orbital period (years)
a:	0.487	Semi-major axis (arcseconds)
i:	125.7	Inclination (degrees)
Ω:	238.02	Longitude of ascending node (degrees)
T:	1930.800	Epoch of periastron passage (year)
e:	0.057	Eccentricity
ω:	317.5	Longitude of periastron (degrees)
Start-Year:	1957.3	Year
End-Year:	2092.7	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU197
Position:	181940.18+101619.2	Epoch-2000 right ascension and declination
WDS-ID:	18197+1016	WDS designation
Discoverer Code:	HU197	Discover designation and components
ADS number:	11260	Aitken Double Star catalog
HD number:	168499	HD catalog number
Hipparcos number:	89806	Hipparcos catalog number
V1:	8.73	Magnitude of the primary
V2:	9.77	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	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:	Hrt2010a	Reference

Double Star Orbit for HU197

WDS 6th Orbit including measures of HU197

-- 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 HU197

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.464    42.28
--------------------------
1957.30    0.426   216.35
1958.30    0.419   214.29
1959.30    0.412   212.17
1960.30    0.404   209.96
1961.30    0.396   207.66
1962.30    0.388   205.27
1963.30    0.380   202.78
1964.30    0.371   200.17
1965.30    0.363   197.44
1966.30    0.355   194.59
1967.30    0.346   191.60
1968.30    0.339   188.46
1969.30    0.331   185.19
1970.30    0.324   181.76
1971.30    0.318   178.19
1972.30    0.312   174.48
1973.30    0.307   170.63
1974.30    0.302   166.67
1975.30    0.299   162.60
1976.30    0.296   158.45
1977.30    0.295   154.25
1978.30    0.294   150.01
1979.30    0.295   145.78
1980.30    0.297   141.58
1981.30    0.299   137.44
1982.30    0.303   133.39
1983.30    0.307   129.44
1984.30    0.313   125.61
1985.30    0.319   121.93
1986.30    0.326   118.38
1987.30    0.333   114.99
1988.30    0.341   111.75
1989.30    0.349   108.66
1990.30    0.357   105.71
1991.30    0.366   102.91
1992.30    0.375   100.23
1993.30    0.384    97.69
1994.30    0.393    95.26
1995.30    0.402    92.94
1996.30    0.411    90.72
1997.30    0.420    88.59
1998.30    0.429    86.55
1999.30    0.437    84.59
2000.30    0.445    82.70
2001.30    0.453    80.88
2002.30    0.460    79.11
2003.30    0.467    77.40
2004.30    0.473    75.74
2005.30    0.479    74.12
2006.30    0.485    72.54
2007.30    0.489    70.99
2008.30    0.494    69.47
2009.30    0.497    67.97
2010.30    0.501    66.50
2011.30    0.503    65.04
2012.30    0.505    63.60
2013.30    0.507    62.16
2014.30    0.507    60.73
2015.30    0.507    59.30
2016.30    0.507    57.87
2017.30    0.505    56.44
2018.30    0.503    55.00
2019.30    0.501    53.54
2020.30    0.498    52.07
2021.30    0.494    50.57
2022.30    0.489    49.05
2023.30    0.484    47.50
2024.30    0.478    45.91
2025.30    0.472    44.29
2026.30    0.465    42.62
2027.30    0.458    40.89
2028.30    0.450    39.11
2029.30    0.442    37.26
2030.30    0.433    35.34
2031.30    0.424    33.34
2032.30    0.414    31.24
2033.30    0.404    29.05
2034.30    0.394    26.74
2035.30    0.384    24.31
2036.30    0.373    21.75
2037.30    0.363    19.03
2038.30    0.352    16.16
2039.30    0.342    13.11
2040.30    0.332     9.88
2041.30    0.323     6.45
2042.30    0.313     2.82
2043.30    0.305   358.97
2044.30    0.297   354.91
2045.30    0.290   350.65
2046.30    0.284   346.20
2047.30    0.280   341.57
2048.30    0.276   336.80
2049.30    0.274   331.93
2050.30    0.273   327.00
2051.30    0.273   322.07
2052.30    0.275   317.17
2053.30    0.278   312.35
2054.30    0.282   307.66
2055.30    0.288   303.13
2056.30    0.294   298.79
2057.30    0.301   294.64
2058.30    0.309   290.69
2059.30    0.318   286.95
2060.30    0.327   283.42
2061.30    0.336   280.08
2062.30    0.346   276.93
2063.30    0.356   273.95
2064.30    0.366   271.12
2065.30    0.375   268.45
2066.30    0.385   265.91
2067.30    0.394   263.48
2068.30    0.403   261.17
2069.30    0.411   258.96
2070.30    0.420   256.83
2071.30    0.427   254.78
2072.30    0.434   252.80
2073.30    0.440   250.87
2074.30    0.446   249.00
2075.30    0.451   247.18
2076.30    0.455   245.39
2077.30    0.459   243.63
2078.30    0.462   241.90
2079.30    0.464   240.19
2080.30    0.466   238.49
2081.30    0.466   236.80
2082.30    0.466   235.11
2083.30    0.465   233.41
2084.30    0.464   231.71
2085.30    0.462   230.00
2086.30    0.459   228.27
2087.30    0.455   226.51
2088.30    0.451   224.72
2089.30    0.446   222.90
2090.30    0.441   221.04
2091.30    0.435   219.12
2092.30    0.429   217.15

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 17:50:34