Double Star Calculator - Orbit

Orbital Elements for HDS3187

WDS:	HDS3187	WDS ID/Discoverer
P:	120.000	Orbital period (years)
a:	0.375	Semi-major axis (arcseconds)
i:	103.3	Inclination (degrees)
Ω:	187.5	Longitude of ascending node (degrees)
T:	2030.293	Epoch of periastron passage (year)
e:	0.4	Eccentricity
ω:	41.7	Longitude of periastron (degrees)
Start-Year:	1965.0	Year
End-Year:	2085.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS3187
Position:	222951.74-310048.0	Epoch-2000 right ascension and declination
WDS-ID:	22299-3101	WDS designation
Discoverer Code:	HDS3187	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	213136	HD catalog number
Hipparcos number:	111051	Hipparcos catalog number
V1:	10.25	Magnitude of the primary
V2:	10.71	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	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:	Tok2023a	Reference

Double Star Orbit for HDS3187

WDS 6th Orbit including measures of HDS3187

-- 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 HDS3187

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.227   184.36
--------------------------
1965.00    0.437   358.60
1966.00    0.431   358.13
1967.00    0.424   357.64
1968.00    0.417   357.14
1969.00    0.410   356.62
1970.00    0.402   356.08
1971.00    0.394   355.52
1972.00    0.386   354.93
1973.00    0.377   354.32
1974.00    0.368   353.68
1975.00    0.359   353.01
1976.00    0.349   352.30
1977.00    0.339   351.55
1978.00    0.329   350.75
1979.00    0.319   349.91
1980.00    0.308   349.00
1981.00    0.297   348.02
1982.00    0.285   346.97
1983.00    0.274   345.84
1984.00    0.262   344.60
1985.00    0.250   343.25
1986.00    0.239   341.76
1987.00    0.227   340.11
1988.00    0.214   338.28
1989.00    0.202   336.23
1990.00    0.190   333.92
1991.00    0.178   331.29
1992.00    0.166   328.29
1993.00    0.155   324.85
1994.00    0.144   320.86
1995.00    0.134   316.22
1996.00    0.124   310.84
1997.00    0.115   304.61
1998.00    0.108   297.47
1999.00    0.103   289.45
2000.00    0.099   280.71
2001.00    0.098   271.57
2002.00    0.099   262.44
2003.00    0.103   253.72
2004.00    0.108   245.72
2005.00    0.115   238.60
2006.00    0.124   232.37
2007.00    0.133   226.97
2008.00    0.143   222.31
2009.00    0.154   218.27
2010.00    0.164   214.75
2011.00    0.175   211.66
2012.00    0.186   208.93
2013.00    0.196   206.48
2014.00    0.206   204.28
2015.00    0.215   202.27
2016.00    0.224   200.42
2017.00    0.231   198.70
2018.00    0.238   197.09
2019.00    0.243   195.55
2020.00    0.247   194.07
2021.00    0.249   192.63
2022.00    0.250   191.20
2023.00    0.249   189.77
2024.00    0.245   188.32
2025.00    0.240   186.81
2026.00    0.232   185.21
2027.00    0.222   183.48
2028.00    0.209   181.56
2029.00    0.194   179.37
2030.00    0.177   176.78
2031.00    0.158   173.60
2032.00    0.138   169.52
2033.00    0.117   163.99
2034.00    0.096   156.05
2035.00    0.077   143.94
2036.00    0.062   125.12
2037.00    0.057    99.39
2038.00    0.064    74.15
2039.00    0.079    56.12
2040.00    0.098    44.59
2041.00    0.120    37.05
2042.00    0.142    31.84
2043.00    0.164    28.04
2044.00    0.186    25.13
2045.00    0.207    22.83
2046.00    0.228    20.95
2047.00    0.248    19.38
2048.00    0.267    18.03
2049.00    0.284    16.86
2050.00    0.302    15.82
2051.00    0.318    14.90
2052.00    0.333    14.06
2053.00    0.347    13.29
2054.00    0.361    12.58
2055.00    0.374    11.92
2056.00    0.385    11.30
2057.00    0.396    10.72
2058.00    0.407    10.17
2059.00    0.416     9.64
2060.00    0.425     9.14
2061.00    0.432     8.65
2062.00    0.440     8.19
2063.00    0.446     7.73
2064.00    0.452     7.29
2065.00    0.457     6.86
2066.00    0.461     6.44
2067.00    0.465     6.02
2068.00    0.468     5.62
2069.00    0.470     5.21
2070.00    0.472     4.81
2071.00    0.474     4.41
2072.00    0.474     4.02
2073.00    0.474     3.62
2074.00    0.474     3.23
2075.00    0.473     2.83
2076.00    0.472     2.43
2077.00    0.470     2.03
2078.00    0.467     1.63
2079.00    0.464     1.22
2080.00    0.461     0.80
2081.00    0.457     0.38
2082.00    0.453   359.95
2083.00    0.448   359.51
2084.00    0.442   359.06

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 18:40:46