Double Star Calculator - Orbit

Orbital Elements for I254

WDS:	I254	WDS ID/Discoverer
P:	152.300	Orbital period (years)
a:	0.519	Semi-major axis (arcseconds)
i:	80.2	Inclination (degrees)
Ω:	34.4	Longitude of ascending node (degrees)
T:	1980.000	Epoch of periastron passage (year)
e:	0.879	Eccentricity
ω:	167.2	Longitude of periastron (degrees)
Start-Year:	1948.85	Year
End-Year:	2101.15	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I254
Position:	193031.57-482609.4	Epoch-2000 right ascension and declination
WDS-ID:	19305-4826	WDS designation
Discoverer Code:	I254	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	183180	HD catalog number
Hipparcos number:	95925	Hipparcos catalog number
V1:	8.69	Magnitude of the primary
V2:	8.81	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2017	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:	Tok2022g	Reference

Double Star Orbit for I254

WDS 6th Orbit including measures of I254

-- 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 I254

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.808    30.27
--------------------------
1948.85    0.731    35.17
1949.85    0.719    35.27
1950.85    0.706    35.37
1951.85    0.693    35.48
1952.85    0.679    35.59
1953.85    0.664    35.70
1954.85    0.649    35.82
1955.85    0.634    35.95
1956.85    0.618    36.08
1957.85    0.601    36.22
1958.85    0.584    36.36
1959.85    0.566    36.52
1960.85    0.548    36.69
1961.85    0.528    36.87
1962.85    0.508    37.06
1963.85    0.487    37.27
1964.85    0.465    37.49
1965.85    0.443    37.74
1966.85    0.419    38.02
1967.85    0.394    38.34
1968.85    0.368    38.69
1969.85    0.340    39.10
1970.85    0.312    39.59
1971.85    0.281    40.18
1972.85    0.248    40.92
1973.85    0.214    41.89
1974.85    0.176    43.26
1975.85    0.136    45.41
1976.85    0.092    49.52
1977.85    0.045    61.99
1978.85    0.020   165.73
1979.85    0.058   210.01
1980.85    0.059   223.41
1981.85    0.034   249.43
1982.85    0.028   322.00
1983.85    0.054   358.51
1984.85    0.086     9.58
1985.85    0.118    14.67
1986.85    0.148    17.62
1987.85    0.177    19.59
1988.85    0.206    21.00
1989.85    0.233    22.08
1990.85    0.258    22.94
1991.85    0.283    23.65
1992.85    0.308    24.24
1993.85    0.331    24.75
1994.85    0.353    25.19
1995.85    0.375    25.58
1996.85    0.396    25.93
1997.85    0.416    26.24
1998.85    0.436    26.53
1999.85    0.455    26.79
2000.85    0.474    27.03
2001.85    0.492    27.25
2002.85    0.510    27.45
2003.85    0.527    27.65
2004.85    0.543    27.83
2005.85    0.559    28.00
2006.85    0.575    28.16
2007.85    0.590    28.31
2008.85    0.605    28.45
2009.85    0.620    28.59
2010.85    0.634    28.72
2011.85    0.647    28.85
2012.85    0.660    28.97
2013.85    0.673    29.09
2014.85    0.686    29.20
2015.85    0.698    29.31
2016.85    0.710    29.41
2017.85    0.721    29.51
2018.85    0.733    29.61
2019.85    0.744    29.70
2020.85    0.754    29.80
2021.85    0.764    29.89
2022.85    0.774    29.97
2023.85    0.784    30.06
2024.85    0.793    30.14
2025.85    0.802    30.22
2026.85    0.811    30.30
2027.85    0.820    30.38
2028.85    0.828    30.46
2029.85    0.836    30.53
2030.85    0.843    30.60
2031.85    0.851    30.68
2032.85    0.858    30.75
2033.85    0.865    30.82
2034.85    0.871    30.88
2035.85    0.878    30.95
2036.85    0.884    31.02
2037.85    0.889    31.08
2038.85    0.895    31.15
2039.85    0.900    31.21
2040.85    0.905    31.28
2041.85    0.910    31.34
2042.85    0.915    31.40
2043.85    0.919    31.46
2044.85    0.923    31.52
2045.85    0.927    31.58
2046.85    0.930    31.64
2047.85    0.934    31.70
2048.85    0.937    31.76
2049.85    0.939    31.82
2050.85    0.942    31.88
2051.85    0.944    31.94
2052.85    0.946    32.00
2053.85    0.948    32.05
2054.85    0.950    32.11
2055.85    0.951    32.17
2056.85    0.952    32.23
2057.85    0.953    32.28
2058.85    0.954    32.34
2059.85    0.954    32.40
2060.85    0.954    32.45
2061.85    0.954    32.51
2062.85    0.954    32.57
2063.85    0.953    32.62
2064.85    0.953    32.68
2065.85    0.951    32.74
2066.85    0.950    32.79
2067.85    0.949    32.85
2068.85    0.947    32.91
2069.85    0.945    32.97
2070.85    0.942    33.02
2071.85    0.940    33.08
2072.85    0.937    33.14
2073.85    0.934    33.20
2074.85    0.930    33.26
2075.85    0.926    33.32
2076.85    0.922    33.38
2077.85    0.918    33.44
2078.85    0.914    33.50
2079.85    0.909    33.57
2080.85    0.904    33.63
2081.85    0.899    33.69
2082.85    0.893    33.76
2083.85    0.887    33.82
2084.85    0.881    33.89
2085.85    0.874    33.96
2086.85    0.867    34.02
2087.85    0.860    34.09
2088.85    0.853    34.16
2089.85    0.845    34.23
2090.85    0.837    34.31
2091.85    0.828    34.38
2092.85    0.819    34.46
2093.85    0.810    34.54
2094.85    0.801    34.62
2095.85    0.791    34.70
2096.85    0.780    34.78
2097.85    0.770    34.87
2098.85    0.759    34.96
2099.85    0.747    35.05
2100.85    0.735    35.14

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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 18:04:53