Double Star Calculator - Orbit

Orbital Elements for REU2

WDS:	REU2	WDS ID/Discoverer
P:	31.450	Orbital period (years)
a:	0.626	Semi-major axis (arcseconds)
i:	143.0	Inclination (degrees)
Ω:	303.0	Longitude of ascending node (degrees)
T:	1992.610	Epoch of periastron passage (year)
e:	0.839	Eccentricity
ω:	25.0	Longitude of periastron (degrees)
Start-Year:	2009.275	Year
End-Year:	2040.725	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for REU2
Position:	145351.40+233320.9	Epoch-2000 right ascension and declination
WDS-ID:	14540+2335	WDS designation
Discoverer Code:	REU2	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	72896	Hipparcos catalog number
V1:	12.24	Magnitude of the primary
V2:	12.66	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Msn2018a	Reference

Double Star Orbit for REU2

WDS 6th Orbit including measures of REU2

-- 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 REU2

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.475   137.34
--------------------------
2009.28    1.106   101.09
2009.38    1.104   100.93
2009.47    1.103   100.77
2009.57    1.102   100.61
2009.67    1.101   100.45
2009.77    1.099   100.28
2009.87    1.098   100.12
2009.97    1.096    99.96
2010.07    1.095    99.80
2010.17    1.093    99.64
2010.27    1.091    99.47
2010.37    1.089    99.31
2010.47    1.088    99.14
2010.57    1.086    98.98
2010.67    1.084    98.81
2010.77    1.082    98.65
2010.87    1.080    98.48
2010.97    1.077    98.31
2011.07    1.075    98.14
2011.17    1.073    97.98
2011.27    1.071    97.81
2011.37    1.068    97.63
2011.47    1.066    97.46
2011.57    1.063    97.29
2011.67    1.060    97.12
2011.77    1.058    96.94
2011.87    1.055    96.77
2011.97    1.052    96.59
2012.07    1.049    96.42
2012.17    1.046    96.24
2012.27    1.043    96.06
2012.37    1.040    95.88
2012.47    1.037    95.70
2012.57    1.034    95.52
2012.67    1.031    95.34
2012.77    1.027    95.15
2012.87    1.024    94.97
2012.97    1.020    94.78
2013.07    1.017    94.59
2013.17    1.013    94.40
2013.27    1.010    94.21
2013.37    1.006    94.02
2013.47    1.002    93.83
2013.57    0.998    93.63
2013.67    0.994    93.44
2013.77    0.990    93.24
2013.87    0.986    93.04
2013.97    0.982    92.84
2014.07    0.978    92.63
2014.17    0.973    92.43
2014.27    0.969    92.22
2014.37    0.965    92.01
2014.47    0.960    91.80
2014.57    0.955    91.59
2014.67    0.951    91.38
2014.77    0.946    91.16
2014.87    0.941    90.94
2014.97    0.936    90.72
2015.07    0.931    90.50
2015.17    0.926    90.27
2015.27    0.921    90.04
2015.37    0.916    89.81
2015.47    0.911    89.58
2015.57    0.905    89.34
2015.67    0.900    89.10
2015.77    0.894    88.86
2015.87    0.889    88.61
2015.97    0.883    88.37
2016.07    0.877    88.11
2016.17    0.872    87.86
2016.27    0.866    87.60
2016.37    0.860    87.34
2016.47    0.854    87.07
2016.57    0.847    86.80
2016.67    0.841    86.53
2016.77    0.835    86.25
2016.87    0.828    85.97
2016.97    0.822    85.68
2017.07    0.815    85.39
2017.17    0.809    85.10
2017.27    0.802    84.80
2017.37    0.795    84.49
2017.47    0.788    84.18
2017.57    0.781    83.86
2017.67    0.774    83.54
2017.77    0.767    83.21
2017.87    0.759    82.88
2017.97    0.752    82.54
2018.07    0.744    82.19
2018.17    0.737    81.83
2018.27    0.729    81.47
2018.37    0.721    81.10
2018.47    0.713    80.72
2018.57    0.705    80.33
2018.67    0.697    79.94
2018.77    0.689    79.53
2018.87    0.680    79.11
2018.97    0.672    78.69
2019.07    0.663    78.25
2019.17    0.655    77.80
2019.27    0.646    77.34
2019.37    0.637    76.87
2019.47    0.628    76.38
2019.57    0.619    75.88
2019.67    0.609    75.36
2019.77    0.600    74.83
2019.87    0.590    74.28
2019.97    0.581    73.71
2020.07    0.571    73.12
2020.17    0.561    72.51
2020.27    0.551    71.88
2020.37    0.541    71.23
2020.47    0.530    70.55
2020.57    0.520    69.84
2020.67    0.509    69.10
2020.77    0.498    68.33
2020.87    0.487    67.53
2020.97    0.476    66.69
2021.07    0.465    65.81
2021.17    0.454    64.89
2021.27    0.442    63.92
2021.37    0.430    62.89
2021.47    0.419    61.81
2021.57    0.406    60.67
2021.67    0.394    59.45
2021.77    0.382    58.15
2021.87    0.369    56.77
2021.97    0.357    55.29
2022.07    0.344    53.70
2022.17    0.331    51.98
2022.27    0.317    50.13
2022.37    0.304    48.11
2022.47    0.290    45.90
2022.57    0.277    43.47
2022.67    0.263    40.79
2022.77    0.249    37.81
2022.87    0.235    34.48
2022.97    0.221    30.73
2023.07    0.207    26.48
2023.17    0.193    21.61
2023.27    0.180    16.01
2023.37    0.167     9.51
2023.47    0.154     1.92
2023.57    0.142   353.03
2023.67    0.131   342.57
2023.77    0.121   330.29
2023.87    0.112   315.89
2023.97    0.104   299.04
2024.07    0.097   279.47
2024.17    0.093   257.66
2024.27    0.096   235.75
2024.37    0.106   216.56
2024.47    0.122   201.40
2024.57    0.140   189.89
2024.67    0.159   181.13
2024.77    0.180   174.32
2024.87    0.200   168.90
2024.97    0.220   164.47
2025.07    0.240   160.78
2025.17    0.259   157.65
2025.27    0.278   154.95
2025.37    0.297   152.59
2025.47    0.315   150.50
2025.57    0.332   148.63
2025.67    0.349   146.95
2025.77    0.366   145.42
2025.87    0.382   144.03
2025.97    0.398   142.74
2026.07    0.413   141.55
2026.17    0.428   140.45
2026.27    0.443   139.42
2026.37    0.457   138.46
2026.47    0.471   137.56
2026.57    0.485   136.70
2026.67    0.498   135.90
2026.77    0.511   135.13
2026.87    0.524   134.41
2026.97    0.537   133.71
2027.07    0.549   133.05
2027.17    0.561   132.42
2027.27    0.573   131.81
2027.37    0.585   131.23
2027.47    0.596   130.67
2027.57    0.608   130.14
2027.67    0.619   129.62
2027.77    0.629   129.12
2027.87    0.640   128.63
2027.97    0.650   128.17
2028.07    0.661   127.71
2028.17    0.671   127.27
2028.27    0.680   126.84
2028.37    0.690   126.43
2028.47    0.700   126.03
2028.57    0.709   125.63
2028.67    0.718   125.25
2028.77    0.727   124.88
2028.87    0.736   124.51
2028.97    0.745   124.16
2029.07    0.753   123.81
2029.17    0.762   123.47
2029.27    0.770   123.14
2029.37    0.778   122.81
2029.47    0.786   122.49
2029.57    0.794   122.18
2029.67    0.802   121.88
2029.77    0.809   121.58
2029.87    0.817   121.28
2029.97    0.824   120.99
2030.07    0.831   120.71
2030.17    0.839   120.43
2030.27    0.846   120.15
2030.37    0.852   119.88
2030.47    0.859   119.62
2030.57    0.866   119.35
2030.67    0.872   119.10
2030.77    0.879   118.84
2030.87    0.885   118.59
2030.97    0.891   118.34
2031.07    0.897   118.10
2031.17    0.903   117.86
2031.27    0.909   117.62
2031.37    0.915   117.39
2031.47    0.921   117.16
2031.57    0.926   116.93
2031.67    0.932   116.70
2031.77    0.937   116.48
2031.87    0.943   116.26
2031.97    0.948   116.04
2032.07    0.953   115.82
2032.17    0.958   115.61
2032.27    0.963   115.40
2032.37    0.968   115.19
2032.47    0.972   114.98
2032.57    0.977   114.78
2032.67    0.981   114.57
2032.77    0.986   114.37
2032.87    0.990   114.17
2032.97    0.995   113.98
2033.07    0.999   113.78
2033.17    1.003   113.58
2033.27    1.007   113.39
2033.37    1.011   113.20
2033.47    1.015   113.01
2033.57    1.019   112.82
2033.67    1.022   112.63
2033.77    1.026   112.45
2033.87    1.030   112.26
2033.97    1.033   112.08
2034.07    1.036   111.90
2034.17    1.040   111.72
2034.27    1.043   111.54
2034.37    1.046   111.36
2034.47    1.049   111.18
2034.57    1.052   111.01
2034.67    1.055   110.83
2034.77    1.058   110.66
2034.87    1.061   110.48
2034.97    1.064   110.31
2035.07    1.066   110.14
2035.17    1.069   109.97
2035.27    1.071   109.80
2035.37    1.074   109.63
2035.47    1.076   109.46
2035.57    1.078   109.29
2035.67    1.081   109.12
2035.77    1.083   108.96
2035.87    1.085   108.79
2035.97    1.087   108.62
2036.07    1.089   108.46
2036.17    1.091   108.30
2036.27    1.092   108.13
2036.37    1.094   107.97
2036.47    1.096   107.81
2036.57    1.097   107.64
2036.67    1.099   107.48
2036.77    1.100   107.32
2036.87    1.102   107.16
2036.97    1.103   107.00
2037.07    1.104   106.84
2037.17    1.105   106.68
2037.27    1.107   106.52
2037.37    1.108   106.36
2037.47    1.109   106.20
2037.57    1.110   106.05
2037.67    1.110   105.89
2037.77    1.111   105.73
2037.87    1.112   105.57
2037.97    1.113   105.41
2038.07    1.113   105.26
2038.17    1.114   105.10
2038.27    1.114   104.94
2038.37    1.115   104.78
2038.47    1.115   104.63
2038.57    1.115   104.47
2038.67    1.115   104.31
2038.77    1.115   104.16
2038.87    1.116   104.00
2038.97    1.116   103.84
2039.07    1.116   103.69
2039.17    1.115   103.53
2039.27    1.115   103.37
2039.37    1.115   103.22
2039.47    1.115   103.06
2039.57    1.114   102.90
2039.67    1.114   102.75
2039.77    1.113   102.59
2039.87    1.113   102.43
2039.97    1.112   102.28
2040.07    1.112   102.12
2040.17    1.111   101.96
2040.27    1.110   101.80
2040.37    1.109   101.64
2040.47    1.108   101.48
2040.57    1.107   101.33
2040.67    1.106   101.17

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 17:10:00