Double Star Calculator - Orbit

Orbital Elements for HU177

WDS:	HU177	WDS ID/Discoverer
P:	220.410	Orbital period (years)
a:	0.293	Semi-major axis (arcseconds)
i:	156.3	Inclination (degrees)
Ω:	179.5	Longitude of ascending node (degrees)
T:	1987.210	Epoch of periastron passage (year)
e:	0.541	Eccentricity
ω:	252.6	Longitude of periastron (degrees)
Start-Year:	1914.795	Year
End-Year:	2135.205	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU177
Position:	173032.15-144621.3	Epoch-2000 right ascension and declination
WDS-ID:	17305-1446	WDS designation
Discoverer Code:	HU177	Discover designation and components
ADS number:	10595	Aitken Double Star catalog
HD number:	158561	HD catalog number
Hipparcos number:	85679	Hipparcos catalog number
V1:	8.5	Magnitude of the primary
V2:	9.6	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2015	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	USN2017b	Reference

Double Star Orbit for HU177

WDS 6th Orbit including measures of HU177

-- 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 HU177

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.304   161.53
--------------------------
1914.80    0.378    83.14
1915.80    0.376    82.38
1916.80    0.374    81.61
1917.80    0.372    80.83
1918.80    0.370    80.05
1919.80    0.368    79.25
1920.80    0.366    78.45
1921.80    0.364    77.64
1922.80    0.361    76.82
1923.80    0.359    75.99
1924.80    0.357    75.15
1925.80    0.355    74.29
1926.80    0.352    73.43
1927.80    0.350    72.55
1928.80    0.347    71.66
1929.80    0.345    70.76
1930.80    0.342    69.85
1931.80    0.340    68.92
1932.80    0.337    67.97
1933.80    0.334    67.01
1934.80    0.331    66.04
1935.80    0.329    65.05
1936.80    0.326    64.04
1937.80    0.323    63.01
1938.80    0.320    61.97
1939.80    0.317    60.90
1940.80    0.314    59.82
1941.80    0.311    58.71
1942.80    0.307    57.58
1943.80    0.304    56.42
1944.80    0.301    55.24
1945.80    0.297    54.04
1946.80    0.294    52.80
1947.80    0.291    51.54
1948.80    0.287    50.24
1949.80    0.283    48.92
1950.80    0.280    47.55
1951.80    0.276    46.16
1952.80    0.272    44.72
1953.80    0.268    43.24
1954.80    0.264    41.72
1955.80    0.261    40.15
1956.80    0.256    38.54
1957.80    0.252    36.87
1958.80    0.248    35.14
1959.80    0.244    33.36
1960.80    0.240    31.51
1961.80    0.235    29.60
1962.80    0.231    27.61
1963.80    0.226    25.54
1964.80    0.222    23.38
1965.80    0.217    21.14
1966.80    0.212    18.79
1967.80    0.207    16.34
1968.80    0.202    13.76
1969.80    0.197    11.06
1970.80    0.192     8.22
1971.80    0.187     5.23
1972.80    0.182     2.07
1973.80    0.177   358.73
1974.80    0.172   355.19
1975.80    0.167   351.43
1976.80    0.162   347.43
1977.80    0.157   343.18
1978.80    0.152   338.65
1979.80    0.147   333.82
1980.80    0.143   328.68
1981.80    0.138   323.21
1982.80    0.135   317.40
1983.80    0.131   311.28
1984.80    0.128   304.85
1985.80    0.126   298.17
1986.80    0.125   291.29
1987.80    0.124   284.29
1988.80    0.124   277.25
1989.80    0.125   270.28
1990.80    0.127   263.46
1991.80    0.129   256.86
1992.80    0.133   250.56
1993.80    0.136   244.58
1994.80    0.141   238.95
1995.80    0.146   233.68
1996.80    0.151   228.75
1997.80    0.156   224.16
1998.80    0.162   219.88
1999.80    0.167   215.89
2000.80    0.173   212.17
2001.80    0.179   208.70
2002.80    0.185   205.44
2003.80    0.191   202.39
2004.80    0.197   199.52
2005.80    0.203   196.82
2006.80    0.209   194.26
2007.80    0.214   191.85
2008.80    0.220   189.56
2009.80    0.226   187.38
2010.80    0.231   185.31
2011.80    0.236   183.33
2012.80    0.242   181.44
2013.80    0.247   179.63
2014.80    0.252   177.90
2015.80    0.257   176.23
2016.80    0.262   174.62
2017.80    0.267   173.08
2018.80    0.271   171.58
2019.80    0.276   170.14
2020.80    0.280   168.75
2021.80    0.285   167.39
2022.80    0.289   166.08
2023.80    0.293   164.81
2024.80    0.297   163.57
2025.80    0.301   162.36
2026.80    0.305   161.19
2027.80    0.309   160.05
2028.80    0.313   158.93
2029.80    0.317   157.84
2030.80    0.320   156.78
2031.80    0.324   155.73
2032.80    0.327   154.71
2033.80    0.330   153.72
2034.80    0.334   152.74
2035.80    0.337   151.78
2036.80    0.340   150.83
2037.80    0.343   149.91
2038.80    0.346   149.00
2039.80    0.349   148.10
2040.80    0.352   147.22
2041.80    0.354   146.36
2042.80    0.357   145.50
2043.80    0.360   144.66
2044.80    0.362   143.84
2045.80    0.365   143.02
2046.80    0.367   142.21
2047.80    0.369   141.42
2048.80    0.372   140.63
2049.80    0.374   139.85
2050.80    0.376   139.09
2051.80    0.378   138.33
2052.80    0.380   137.58
2053.80    0.382   136.83
2054.80    0.384   136.10
2055.80    0.386   135.37
2056.80    0.388   134.65
2057.80    0.389   133.93
2058.80    0.391   133.22
2059.80    0.393   132.52
2060.80    0.394   131.82
2061.80    0.396   131.13
2062.80    0.397   130.44
2063.80    0.399   129.76
2064.80    0.400   129.09
2065.80    0.401   128.41
2066.80    0.403   127.74
2067.80    0.404   127.08
2068.80    0.405   126.42
2069.80    0.406   125.76
2070.80    0.407   125.11
2071.80    0.408   124.46
2072.80    0.409   123.81
2073.80    0.410   123.17
2074.80    0.411   122.53
2075.80    0.411   121.89
2076.80    0.412   121.25
2077.80    0.413   120.61
2078.80    0.413   119.98
2079.80    0.414   119.35
2080.80    0.415   118.72
2081.80    0.415   118.09
2082.80    0.416   117.47
2083.80    0.416   116.84
2084.80    0.416   116.22
2085.80    0.417   115.60
2086.80    0.417   114.98
2087.80    0.417   114.36
2088.80    0.417   113.74
2089.80    0.417   113.12
2090.80    0.418   112.50
2091.80    0.418   111.88
2092.80    0.418   111.26
2093.80    0.418   110.64
2094.80    0.417   110.02
2095.80    0.417   109.40
2096.80    0.417   108.78
2097.80    0.417   108.16
2098.80    0.417   107.54
2099.80    0.416   106.91
2100.80    0.416   106.29
2101.80    0.416   105.66
2102.80    0.415   105.04
2103.80    0.415   104.41
2104.80    0.414   103.78
2105.80    0.414   103.15
2106.80    0.413   102.52
2107.80    0.412   101.89
2108.80    0.412   101.25
2109.80    0.411   100.61
2110.80    0.410    99.97
2111.80    0.409    99.33
2112.80    0.408    98.68
2113.80    0.407    98.03
2114.80    0.407    97.38
2115.80    0.406    96.72
2116.80    0.404    96.07
2117.80    0.403    95.40
2118.80    0.402    94.74
2119.80    0.401    94.07
2120.80    0.400    93.40
2121.80    0.399    92.72
2122.80    0.397    92.04
2123.80    0.396    91.35
2124.80    0.395    90.66
2125.80    0.393    89.97
2126.80    0.392    89.26
2127.80    0.390    88.56
2128.80    0.389    87.85
2129.80    0.387    87.13
2130.80    0.385    86.41
2131.80    0.384    85.68
2132.80    0.382    84.94
2133.80    0.380    84.20
2134.80    0.379    83.45

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 17:39:22