Double Star Calculator - Orbit

Orbital Elements for YR4

WDS:	YR4	WDS ID/Discoverer
P:	39.120	Orbital period (years)
a:	0.2727	Semi-major axis (arcseconds)
i:	150.3	Inclination (degrees)
Ω:	81.0	Longitude of ascending node (degrees)
T:	2025.440	Epoch of periastron passage (year)
e:	0.694	Eccentricity
ω:	66.0	Longitude of periastron (degrees)
Start-Year:	2005.44	Year
End-Year:	2044.56	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for YR4
Position:	002608.64-112236.8	Epoch-2000 right ascension and declination
WDS-ID:	00261-1123	WDS designation
Discoverer Code:	YR4	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	2237	HD catalog number
Hipparcos number:	2066	Hipparcos catalog number
V1:	8.33	Magnitude of the primary
V2:	11.32	Magnitude of the secondary
Equinox:		Equinox
Date:		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:	Msn2023	Reference

Double Star Orbit for YR4

WDS 6th Orbit including measures of YR4

-- 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 YR4

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.099   308.22
--------------------------
2005.44    0.413   199.25
2005.54    0.412   198.99
2005.64    0.412   198.74
2005.74    0.412   198.49
2005.84    0.412   198.24
2005.94    0.412   197.99
2006.04    0.412   197.73
2006.14    0.411   197.48
2006.24    0.411   197.23
2006.34    0.411   196.98
2006.44    0.411   196.72
2006.54    0.410   196.47
2006.64    0.410   196.21
2006.74    0.410   195.96
2006.84    0.409   195.70
2006.94    0.409   195.45
2007.04    0.409   195.19
2007.14    0.408   194.94
2007.24    0.408   194.68
2007.34    0.408   194.42
2007.44    0.407   194.16
2007.54    0.407   193.91
2007.64    0.406   193.65
2007.74    0.406   193.39
2007.84    0.406   193.13
2007.94    0.405   192.87
2008.04    0.405   192.61
2008.14    0.404   192.34
2008.24    0.404   192.08
2008.34    0.403   191.82
2008.44    0.403   191.55
2008.54    0.402   191.29
2008.64    0.401   191.03
2008.74    0.401   190.76
2008.84    0.400   190.49
2008.94    0.400   190.22
2009.04    0.399   189.96
2009.14    0.398   189.69
2009.24    0.398   189.42
2009.34    0.397   189.15
2009.44    0.396   188.87
2009.54    0.396   188.60
2009.64    0.395   188.33
2009.74    0.394   188.05
2009.84    0.394   187.78
2009.94    0.393   187.50
2010.04    0.392   187.22
2010.14    0.391   186.94
2010.24    0.391   186.66
2010.34    0.390   186.38
2010.44    0.389   186.10
2010.54    0.388   185.82
2010.64    0.387   185.53
2010.74    0.386   185.25
2010.84    0.386   184.96
2010.94    0.385   184.67
2011.04    0.384   184.38
2011.14    0.383   184.09
2011.24    0.382   183.80
2011.34    0.381   183.50
2011.44    0.380   183.21
2011.54    0.379   182.91
2011.64    0.378   182.61
2011.74    0.377   182.31
2011.84    0.376   182.01
2011.94    0.375   181.71
2012.04    0.374   181.40
2012.14    0.373   181.10
2012.24    0.372   180.79
2012.34    0.371   180.48
2012.44    0.370   180.17
2012.54    0.369   179.85
2012.64    0.368   179.54
2012.74    0.367   179.22
2012.84    0.365   178.90
2012.94    0.364   178.58
2013.04    0.363   178.26
2013.14    0.362   177.93
2013.24    0.361   177.60
2013.34    0.360   177.27
2013.44    0.358   176.94
2013.54    0.357   176.61
2013.64    0.356   176.27
2013.74    0.355   175.93
2013.84    0.353   175.59
2013.94    0.352   175.24
2014.04    0.351   174.90
2014.14    0.349   174.55
2014.24    0.348   174.20
2014.34    0.347   173.84
2014.44    0.345   173.48
2014.54    0.344   173.12
2014.64    0.342   172.76
2014.74    0.341   172.39
2014.84    0.339   172.02
2014.94    0.338   171.65
2015.04    0.337   171.27
2015.14    0.335   170.89
2015.24    0.334   170.51
2015.34    0.332   170.12
2015.44    0.331   169.73
2015.54    0.329   169.34
2015.64    0.327   168.94
2015.74    0.326   168.54
2015.84    0.324   168.14
2015.94    0.323   167.73
2016.04    0.321   167.31
2016.14    0.319   166.90
2016.24    0.318   166.47
2016.34    0.316   166.05
2016.44    0.314   165.62
2016.54    0.313   165.18
2016.64    0.311   164.74
2016.74    0.309   164.29
2016.84    0.307   163.84
2016.94    0.306   163.39
2017.04    0.304   162.93
2017.14    0.302   162.46
2017.24    0.300   161.99
2017.34    0.298   161.51
2017.44    0.296   161.02
2017.54    0.294   160.53
2017.64    0.293   160.04
2017.74    0.291   159.53
2017.84    0.289   159.02
2017.94    0.287   158.51
2018.04    0.285   157.98
2018.14    0.283   157.45
2018.24    0.281   156.91
2018.34    0.279   156.36
2018.44    0.277   155.81
2018.54    0.275   155.25
2018.64    0.272   154.67
2018.74    0.270   154.09
2018.84    0.268   153.50
2018.94    0.266   152.90
2019.04    0.264   152.29
2019.14    0.262   151.67
2019.24    0.259   151.04
2019.34    0.257   150.40
2019.44    0.255   149.75
2019.54    0.253   149.08
2019.64    0.250   148.40
2019.74    0.248   147.71
2019.84    0.246   147.01
2019.94    0.243   146.30
2020.04    0.241   145.56
2020.14    0.238   144.82
2020.24    0.236   144.06
2020.34    0.233   143.28
2020.44    0.231   142.49
2020.54    0.228   141.68
2020.64    0.226   140.85
2020.74    0.223   140.00
2020.84    0.221   139.13
2020.94    0.218   138.24
2021.04    0.215   137.33
2021.14    0.213   136.40
2021.24    0.210   135.44
2021.34    0.207   134.46
2021.44    0.205   133.45
2021.54    0.202   132.42
2021.64    0.199   131.35
2021.74    0.196   130.25
2021.84    0.193   129.12
2021.94    0.190   127.96
2022.04    0.187   126.76
2022.14    0.184   125.52
2022.24    0.181   124.24
2022.34    0.178   122.92
2022.44    0.175   121.55
2022.54    0.172   120.13
2022.64    0.169   118.66
2022.74    0.166   117.14
2022.84    0.163   115.55
2022.94    0.159   113.89
2023.04    0.156   112.17
2023.14    0.153   110.37
2023.24    0.149   108.49
2023.34    0.146   106.52
2023.44    0.142   104.46
2023.54    0.139   102.29
2023.64    0.135   100.01
2023.74    0.131    97.60
2023.84    0.128    95.05
2023.94    0.124    92.35
2024.04    0.120    89.48
2024.14    0.116    86.43
2024.24    0.113    83.17
2024.34    0.109    79.68
2024.44    0.105    75.93
2024.54    0.101    71.90
2024.64    0.097    67.54
2024.74    0.094    62.84
2024.84    0.090    57.75
2024.94    0.086    52.24
2025.04    0.083    46.28
2025.14    0.080    39.87
2025.24    0.078    33.01
2025.34    0.076    25.74
2025.44    0.074    18.14
2025.54    0.074    10.32
2025.64    0.074     2.43
2025.74    0.075   354.63
2025.84    0.076   347.07
2025.94    0.078   339.86
2026.04    0.081   333.09
2026.14    0.084   326.81
2026.24    0.088   321.04
2026.34    0.092   315.75
2026.44    0.096   310.92
2026.54    0.101   306.51
2026.64    0.105   302.48
2026.74    0.110   298.79
2026.84    0.115   295.41
2026.94    0.120   292.30
2027.04    0.125   289.43
2027.14    0.129   286.77
2027.24    0.134   284.30
2027.34    0.139   282.00
2027.44    0.143   279.85
2027.54    0.148   277.83
2027.64    0.153   275.94
2027.74    0.157   274.15
2027.84    0.162   272.47
2027.94    0.166   270.87
2028.04    0.170   269.36
2028.14    0.175   267.92
2028.24    0.179   266.54
2028.34    0.183   265.23
2028.44    0.187   263.98
2028.54    0.191   262.78
2028.64    0.195   261.63
2028.74    0.199   260.52
2028.84    0.202   259.46
2028.94    0.206   258.43
2029.04    0.210   257.44
2029.14    0.213   256.49
2029.24    0.217   255.57
2029.34    0.221   254.67
2029.44    0.224   253.80
2029.54    0.227   252.96
2029.64    0.231   252.15
2029.74    0.234   251.36
2029.84    0.237   250.59
2029.94    0.240   249.84
2030.04    0.244   249.11
2030.14    0.247   248.39
2030.24    0.250   247.70
2030.34    0.253   247.02
2030.44    0.256   246.36
2030.54    0.259   245.71
2030.64    0.262   245.08
2030.74    0.264   244.46
2030.84    0.267   243.85
2030.94    0.270   243.26
2031.04    0.273   242.68
2031.14    0.275   242.11
2031.24    0.278   241.55
2031.34    0.280   241.00
2031.44    0.283   240.46
2031.54    0.286   239.93
2031.64    0.288   239.41
2031.74    0.290   238.90
2031.84    0.293   238.40
2031.94    0.295   237.90
2032.04    0.298   237.41
2032.14    0.300   236.94
2032.24    0.302   236.46
2032.34    0.304   236.00
2032.44    0.307   235.54
2032.54    0.309   235.09
2032.64    0.311   234.64
2032.74    0.313   234.20
2032.84    0.315   233.77
2032.94    0.317   233.34
2033.04    0.319   232.92
2033.14    0.321   232.50
2033.24    0.323   232.09
2033.34    0.325   231.68
2033.44    0.327   231.28
2033.54    0.329   230.88
2033.64    0.331   230.49
2033.74    0.333   230.10
2033.84    0.334   229.71
2033.94    0.336   229.33
2034.04    0.338   228.96
2034.14    0.340   228.58
2034.24    0.341   228.21
2034.34    0.343   227.85
2034.44    0.345   227.49
2034.54    0.346   227.13
2034.64    0.348   226.77
2034.74    0.350   226.42
2034.84    0.351   226.07
2034.94    0.353   225.73
2035.04    0.354   225.38
2035.14    0.356   225.04
2035.24    0.357   224.71
2035.34    0.358   224.37
2035.44    0.360   224.04
2035.54    0.361   223.71
2035.64    0.363   223.39
2035.74    0.364   223.06
2035.84    0.365   222.74
2035.94    0.367   222.42
2036.04    0.368   222.10
2036.14    0.369   221.79
2036.24    0.370   221.47
2036.34    0.372   221.16
2036.44    0.373   220.85
2036.54    0.374   220.55
2036.64    0.375   220.24
2036.74    0.376   219.94
2036.84    0.377   219.64
2036.94    0.379   219.34
2037.04    0.380   219.04
2037.14    0.381   218.75
2037.24    0.382   218.45
2037.34    0.383   218.16
2037.44    0.384   217.87
2037.54    0.385   217.58
2037.64    0.386   217.29
2037.74    0.387   217.00
2037.84    0.388   216.72
2037.94    0.389   216.43
2038.04    0.389   216.15
2038.14    0.390   215.87
2038.24    0.391   215.59
2038.34    0.392   215.31
2038.44    0.393   215.03
2038.54    0.394   214.75
2038.64    0.394   214.48
2038.74    0.395   214.20
2038.84    0.396   213.93
2038.94    0.397   213.66
2039.04    0.397   213.38
2039.14    0.398   213.11
2039.24    0.399   212.84
2039.34    0.399   212.58
2039.44    0.400   212.31
2039.54    0.401   212.04
2039.64    0.401   211.78
2039.74    0.402   211.51
2039.84    0.403   211.25
2039.94    0.403   210.98
2040.04    0.404   210.72
2040.14    0.404   210.46
2040.24    0.405   210.19
2040.34    0.405   209.93
2040.44    0.406   209.67
2040.54    0.406   209.41
2040.64    0.407   209.15
2040.74    0.407   208.90
2040.84    0.407   208.64
2040.94    0.408   208.38
2041.04    0.408   208.12
2041.14    0.409   207.87
2041.24    0.409   207.61
2041.34    0.409   207.35
2041.44    0.410   207.10
2041.54    0.410   206.84
2041.64    0.410   206.59
2041.74    0.411   206.34
2041.84    0.411   206.08
2041.94    0.411   205.83
2042.04    0.411   205.58
2042.14    0.412   205.32
2042.24    0.412   205.07
2042.34    0.412   204.82
2042.44    0.412   204.57
2042.54    0.412   204.31
2042.64    0.412   204.06
2042.74    0.413   203.81
2042.84    0.413   203.56
2042.94    0.413   203.31
2043.04    0.413   203.06
2043.14    0.413   202.81
2043.24    0.413   202.56
2043.34    0.413   202.31
2043.44    0.413   202.06
2043.54    0.413   201.80
2043.64    0.413   201.55
2043.74    0.413   201.30
2043.84    0.413   201.05
2043.94    0.413   200.80
2044.04    0.413   200.55
2044.14    0.413   200.30
2044.24    0.413   200.05
2044.34    0.413   199.80
2044.44    0.413   199.55
2044.54    0.413   199.30

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 14:39:17