Double Star Calculator - Orbit

Orbital Elements for NZO65

WDS:	NZO65	WDS ID/Discoverer
P:	120.650	Orbital period (years)
a:	0.67	Semi-major axis (arcseconds)
i:	84.8	Inclination (degrees)
Ω:	124.3	Longitude of ascending node (degrees)
T:	2012.130	Epoch of periastron passage (year)
e:	0.518	Eccentricity
ω:	229.8	Longitude of periastron (degrees)
Start-Year:	1964.675	Year
End-Year:	2085.325	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for NZO65
Position:	155448.49-655404.3	Epoch-2000 right ascension and declination
WDS-ID:	15548-6554	WDS designation
Discoverer Code:	NZO65	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	141747	HD catalog number
Hipparcos number:	77921	Hipparcos catalog number
V1:	8.35	Magnitude of the primary
V2:	8.49	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	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:	Doc2023c	Reference

Double Star Orbit for NZO65

WDS 6th Orbit including measures of NZO65

-- 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 NZO65

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.497   121.67
--------------------------
1964.67    0.433   135.00
1965.67    0.412   135.59
1966.67    0.391   136.23
1967.67    0.370   136.95
1968.67    0.349   137.75
1969.67    0.328   138.65
1970.67    0.306   139.69
1971.67    0.284   140.88
1972.67    0.262   142.28
1973.67    0.240   143.93
1974.67    0.218   145.92
1975.67    0.196   148.35
1976.67    0.174   151.40
1977.67    0.153   155.32
1978.67    0.132   160.49
1979.67    0.113   167.50
1980.67    0.095   177.22
1981.67    0.082   190.61
1982.67    0.074   207.90
1983.67    0.074   226.98
1984.67    0.082   244.19
1985.67    0.096   257.49
1986.67    0.113   267.14
1987.67    0.132   274.11
1988.67    0.153   279.26
1989.67    0.174   283.18
1990.67    0.195   286.25
1991.67    0.216   288.71
1992.67    0.237   290.73
1993.67    0.258   292.43
1994.67    0.278   293.88
1995.67    0.297   295.14
1996.67    0.315   296.24
1997.67    0.332   297.24
1998.67    0.348   298.13
1999.67    0.361   298.96
2000.67    0.373   299.73
2001.67    0.382   300.46
2002.67    0.388   301.16
2003.67    0.391   301.84
2004.67    0.391   302.52
2005.67    0.385   303.21
2006.67    0.375   303.92
2007.67    0.359   304.69
2008.67    0.336   305.55
2009.67    0.307   306.55
2010.67    0.272   307.79
2011.67    0.230   309.44
2012.67    0.184   311.89
2013.67    0.133   316.13
2014.67    0.081   325.80
2015.67    0.037     3.42
2016.67    0.050    83.80
2017.67    0.100   104.96
2018.67    0.153   111.76
2019.67    0.205   115.08
2020.67    0.255   117.07
2021.67    0.302   118.41
2022.67    0.347   119.40
2023.67    0.390   120.17
2024.67    0.430   120.78
2025.67    0.468   121.30
2026.67    0.503   121.74
2027.67    0.536   122.13
2028.67    0.567   122.47
2029.67    0.595   122.78
2030.67    0.622   123.06
2031.67    0.646   123.31
2032.67    0.669   123.55
2033.67    0.690   123.78
2034.67    0.710   123.99
2035.67    0.727   124.19
2036.67    0.743   124.38
2037.67    0.758   124.57
2038.67    0.772   124.75
2039.67    0.784   124.92
2040.67    0.794   125.08
2041.67    0.804   125.25
2042.67    0.812   125.41
2043.67    0.819   125.56
2044.67    0.825   125.72
2045.67    0.830   125.87
2046.67    0.834   126.02
2047.67    0.837   126.17
2048.68    0.839   126.31
2049.68    0.840   126.46
2050.68    0.840   126.61
2051.68    0.839   126.76
2052.68    0.837   126.90
2053.68    0.835   127.05
2054.68    0.832   127.20
2055.68    0.828   127.35
2056.68    0.823   127.50
2057.68    0.817   127.66
2058.68    0.811   127.82
2059.68    0.804   127.98
2060.68    0.796   128.14
2061.68    0.788   128.30
2062.68    0.779   128.47
2063.68    0.770   128.64
2064.68    0.759   128.82
2065.68    0.748   129.01
2066.68    0.737   129.19
2067.68    0.725   129.39
2068.68    0.713   129.59
2069.68    0.699   129.80
2070.68    0.686   130.01
2071.68    0.672   130.24
2072.68    0.657   130.47
2073.68    0.642   130.72
2074.68    0.626   130.98
2075.68    0.610   131.25
2076.68    0.593   131.54
2077.68    0.576   131.84
2078.68    0.559   132.16
2079.68    0.541   132.51
2080.68    0.523   132.87
2081.68    0.504   133.27
2082.68    0.485   133.69
2083.68    0.465   134.15
2084.68    0.446   134.65

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 17:21:04