Double Star Calculator - Orbit

Orbital Elements for HDS637

WDS:	HDS637	WDS ID/Discoverer
P:	41.040	Orbital period (years)
a:	0.303	Semi-major axis (arcseconds)
i:	110.5	Inclination (degrees)
Ω:	248.7	Longitude of ascending node (degrees)
T:	2007.650	Epoch of periastron passage (year)
e:	0.55	Eccentricity
ω:	112.3	Longitude of periastron (degrees)
Start-Year:	2004.48	Year
End-Year:	2045.52	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS637
Position:	045556.72-305131.0	Epoch-2000 right ascension and declination
WDS-ID:	04559-3052	WDS designation
Discoverer Code:	HDS637	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	22921	Hipparcos catalog number
V1:	10.59	Magnitude of the primary
V2:	11.31	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2016	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:	Tok2017c	Reference

Double Star Orbit for HDS637

WDS 6th Orbit including measures of HDS637

-- 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 HDS637

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.209   297.24
--------------------------
2004.48    0.184   238.67
2004.58    0.179   237.95
2004.68    0.173   237.19
2004.78    0.168   236.39
2004.88    0.163   235.52
2004.98    0.157   234.60
2005.08    0.151   233.61
2005.18    0.146   232.55
2005.28    0.140   231.39
2005.38    0.134   230.13
2005.48    0.128   228.76
2005.58    0.122   227.24
2005.68    0.116   225.57
2005.78    0.109   223.70
2005.88    0.103   221.61
2005.98    0.097   219.25
2006.08    0.090   216.56
2006.18    0.084   213.47
2006.28    0.078   209.90
2006.38    0.072   205.75
2006.48    0.067   200.89
2006.58    0.062   195.20
2006.68    0.057   188.55
2006.78    0.054   180.89
2006.88    0.051   172.24
2006.98    0.049   162.83
2007.08    0.049   153.05
2007.18    0.050   143.41
2007.28    0.052   134.37
2007.38    0.056   126.23
2007.48    0.060   119.10
2007.58    0.064   112.96
2007.68    0.070   107.70
2007.78    0.075   103.20
2007.88    0.081    99.33
2007.98    0.087    95.98
2008.08    0.093    93.06
2008.18    0.099    90.48
2008.28    0.105    88.20
2008.38    0.110    86.16
2008.48    0.116    84.31
2008.58    0.121    82.64
2008.68    0.127    81.10
2008.78    0.132    79.69
2008.88    0.137    78.38
2008.98    0.141    77.16
2009.08    0.146    76.02
2009.18    0.150    74.95
2009.28    0.154    73.93
2009.38    0.158    72.97
2009.48    0.162    72.05
2009.58    0.165    71.17
2009.68    0.169    70.32
2009.78    0.172    69.51
2009.88    0.175    68.73
2009.98    0.177    67.97
2010.08    0.180    67.23
2010.18    0.182    66.51
2010.28    0.185    65.82
2010.38    0.187    65.13
2010.48    0.189    64.46
2010.58    0.190    63.81
2010.68    0.192    63.17
2010.78    0.194    62.53
2010.88    0.195    61.91
2010.98    0.196    61.29
2011.08    0.197    60.68
2011.18    0.198    60.08
2011.28    0.199    59.48
2011.38    0.200    58.89
2011.48    0.201    58.31
2011.58    0.201    57.72
2011.68    0.202    57.14
2011.78    0.202    56.56
2011.88    0.202    55.99
2011.98    0.203    55.41
2012.08    0.203    54.84
2012.18    0.203    54.27
2012.28    0.203    53.70
2012.38    0.203    53.12
2012.48    0.203    52.55
2012.58    0.203    51.98
2012.68    0.202    51.40
2012.78    0.202    50.82
2012.88    0.202    50.25
2012.98    0.201    49.67
2013.08    0.201    49.08
2013.18    0.200    48.50
2013.28    0.200    47.91
2013.38    0.199    47.32
2013.48    0.199    46.72
2013.58    0.198    46.12
2013.68    0.197    45.52
2013.78    0.196    44.91
2013.88    0.196    44.29
2013.98    0.195    43.68
2014.08    0.194    43.05
2014.18    0.193    42.43
2014.28    0.192    41.79
2014.38    0.191    41.15
2014.48    0.191    40.51
2014.58    0.190    39.86
2014.68    0.189    39.20
2014.78    0.188    38.53
2014.88    0.187    37.86
2014.98    0.186    37.18
2015.08    0.185    36.50
2015.18    0.184    35.80
2015.28    0.183    35.10
2015.38    0.182    34.40
2015.48    0.181    33.68
2015.58    0.180    32.95
2015.68    0.179    32.22
2015.78    0.178    31.48
2015.88    0.177    30.73
2015.98    0.176    29.97
2016.08    0.175    29.20
2016.18    0.174    28.43
2016.28    0.173    27.64
2016.38    0.172    26.84
2016.48    0.171    26.04
2016.58    0.170    25.23
2016.68    0.169    24.40
2016.78    0.168    23.57
2016.88    0.167    22.73
2016.98    0.166    21.87
2017.08    0.165    21.01
2017.18    0.164    20.14
2017.28    0.163    19.26
2017.38    0.162    18.37
2017.48    0.161    17.47
2017.58    0.160    16.56
2017.68    0.160    15.64
2017.78    0.159    14.71
2017.88    0.158    13.77
2017.98    0.157    12.82
2018.08    0.157    11.86
2018.18    0.156    10.90
2018.28    0.155     9.92
2018.38    0.155     8.94
2018.48    0.154     7.95
2018.58    0.153     6.95
2018.68    0.153     5.95
2018.78    0.152     4.94
2018.88    0.152     3.92
2018.98    0.151     2.89
2019.08    0.151     1.86
2019.18    0.150     0.82
2019.28    0.150   359.78
2019.38    0.150   358.73
2019.48    0.150   357.68
2019.58    0.149   356.62
2019.68    0.149   355.56
2019.78    0.149   354.50
2019.88    0.149   353.44
2019.98    0.149   352.37
2020.08    0.149   351.31
2020.18    0.149   350.24
2020.28    0.149   349.17
2020.38    0.149   348.10
2020.48    0.149   347.04
2020.58    0.149   345.97
2020.68    0.149   344.91
2020.78    0.149   343.85
2020.88    0.149   342.79
2020.98    0.150   341.74
2021.08    0.150   340.69
2021.18    0.150   339.64
2021.28    0.151   338.61
2021.38    0.151   337.57
2021.48    0.152   336.54
2021.58    0.152   335.52
2021.68    0.153   334.51
2021.78    0.153   333.50
2021.88    0.154   332.50
2021.98    0.154   331.51
2022.08    0.155   330.53
2022.18    0.156   329.55
2022.28    0.157   328.59
2022.38    0.157   327.63
2022.48    0.158   326.69
2022.58    0.159   325.75
2022.68    0.160   324.82
2022.78    0.161   323.91
2022.88    0.162   323.00
2022.98    0.163   322.11
2023.08    0.164   321.22
2023.18    0.165   320.35
2023.28    0.166   319.48
2023.38    0.167   318.63
2023.48    0.168   317.79
2023.58    0.169   316.96
2023.68    0.170   316.14
2023.78    0.171   315.33
2023.88    0.172   314.53
2023.98    0.174   313.74
2024.08    0.175   312.97
2024.18    0.176   312.20
2024.28    0.177   311.45
2024.38    0.179   310.70
2024.48    0.180   309.97
2024.58    0.181   309.25
2024.68    0.182   308.53
2024.78    0.184   307.83
2024.88    0.185   307.14
2024.98    0.187   306.46
2025.08    0.188   305.79
2025.18    0.189   305.12
2025.28    0.191   304.47
2025.38    0.192   303.83
2025.48    0.194   303.20
2025.58    0.195   302.57
2025.68    0.196   301.96
2025.78    0.198   301.35
2025.88    0.199   300.75
2025.98    0.201   300.16
2026.08    0.202   299.59
2026.18    0.204   299.01
2026.28    0.205   298.45
2026.38    0.207   297.90
2026.48    0.208   297.35
2026.58    0.210   296.81
2026.68    0.211   296.28
2026.78    0.213   295.76
2026.88    0.214   295.24
2026.98    0.216   294.73
2027.08    0.218   294.23
2027.18    0.219   293.74
2027.28    0.221   293.25
2027.38    0.222   292.77
2027.48    0.224   292.29
2027.58    0.225   291.83
2027.68    0.227   291.37
2027.78    0.228   290.91
2027.88    0.230   290.46
2027.98    0.231   290.02
2028.08    0.233   289.58
2028.18    0.234   289.15
2028.28    0.236   288.73
2028.38    0.238   288.31
2028.48    0.239   287.89
2028.58    0.241   287.48
2028.68    0.242   287.08
2028.78    0.244   286.68
2028.88    0.245   286.28
2028.98    0.247   285.89
2029.08    0.248   285.51
2029.18    0.250   285.13
2029.28    0.251   284.76
2029.38    0.253   284.38
2029.48    0.254   284.02
2029.58    0.256   283.66
2029.68    0.257   283.30
2029.78    0.259   282.94
2029.88    0.260   282.59
2029.98    0.262   282.25
2030.08    0.263   281.91
2030.18    0.265   281.57
2030.28    0.266   281.23
2030.38    0.267   280.90
2030.48    0.269   280.57
2030.58    0.270   280.25
2030.68    0.272   279.93
2030.78    0.273   279.61
2030.88    0.274   279.30
2030.98    0.276   278.99
2031.08    0.277   278.68
2031.18    0.279   278.37
2031.28    0.280   278.07
2031.38    0.281   277.77
2031.48    0.283   277.48
2031.58    0.284   277.18
2031.68    0.285   276.89
2031.78    0.287   276.60
2031.88    0.288   276.32
2031.98    0.289   276.03
2032.08    0.290   275.75
2032.18    0.292   275.48
2032.28    0.293   275.20
2032.38    0.294   274.93
2032.48    0.295   274.65
2032.58    0.296   274.39
2032.68    0.298   274.12
2032.78    0.299   273.85
2032.88    0.300   273.59
2032.98    0.301   273.33
2033.08    0.302   273.07
2033.18    0.303   272.81
2033.28    0.304   272.56
2033.38    0.305   272.30
2033.48    0.306   272.05
2033.58    0.307   271.80
2033.68    0.308   271.55
2033.78    0.309   271.31
2033.88    0.310   271.06
2033.98    0.311   270.82
2034.08    0.312   270.58
2034.18    0.313   270.34
2034.28    0.314   270.10
2034.38    0.315   269.86
2034.48    0.316   269.62
2034.58    0.317   269.39
2034.68    0.318   269.15
2034.78    0.318   268.92
2034.88    0.319   268.69
2034.98    0.320   268.46
2035.08    0.321   268.23
2035.18    0.321   268.00
2035.28    0.322   267.77
2035.38    0.323   267.54
2035.48    0.324   267.32
2035.58    0.324   267.09
2035.68    0.325   266.87
2035.78    0.325   266.65
2035.88    0.326   266.43
2035.98    0.326   266.20
2036.08    0.327   265.98
2036.18    0.328   265.76
2036.28    0.328   265.54
2036.38    0.328   265.33
2036.48    0.329   265.11
2036.58    0.329   264.89
2036.68    0.330   264.67
2036.78    0.330   264.46
2036.88    0.330   264.24
2036.98    0.331   264.02
2037.08    0.331   263.81
2037.18    0.331   263.59
2037.28    0.331   263.38
2037.38    0.331   263.16
2037.48    0.332   262.95
2037.58    0.332   262.74
2037.68    0.332   262.52
2037.78    0.332   262.31
2037.88    0.332   262.09
2037.98    0.332   261.88
2038.08    0.332   261.67
2038.18    0.332   261.45
2038.28    0.332   261.24
2038.38    0.332   261.02
2038.48    0.331   260.81
2038.58    0.331   260.60
2038.68    0.331   260.38
2038.78    0.331   260.17
2038.88    0.330   259.95
2038.98    0.330   259.73
2039.08    0.330   259.52
2039.18    0.329   259.30
2039.28    0.329   259.08
2039.38    0.328   258.86
2039.48    0.328   258.65
2039.58    0.327   258.43
2039.68    0.326   258.20
2039.78    0.326   257.98
2039.88    0.325   257.76
2039.98    0.324   257.54
2040.08    0.324   257.31
2040.18    0.323   257.09
2040.28    0.322   256.86
2040.38    0.321   256.63
2040.48    0.320   256.40
2040.58    0.319   256.17
2040.68    0.318   255.94
2040.78    0.317   255.71
2040.88    0.315   255.47
2040.98    0.314   255.23
2041.08    0.313   254.99
2041.18    0.312   254.75
2041.28    0.310   254.51
2041.38    0.309   254.26
2041.48    0.307   254.01
2041.58    0.306   253.76
2041.68    0.304   253.51
2041.78    0.302   253.25
2041.88    0.301   252.99
2041.98    0.299   252.73
2042.08    0.297   252.47
2042.18    0.295   252.20
2042.28    0.293   251.92
2042.38    0.291   251.65
2042.48    0.289   251.37
2042.58    0.287   251.08
2042.68    0.284   250.79
2042.78    0.282   250.50
2042.88    0.280   250.20
2042.98    0.277   249.90
2043.08    0.275   249.59
2043.18    0.272   249.27
2043.28    0.269   248.95
2043.38    0.266   248.62
2043.48    0.264   248.29
2043.58    0.261   247.95
2043.68    0.258   247.59
2043.78    0.254   247.23
2043.88    0.251   246.87
2043.98    0.248   246.49
2044.08    0.244   246.10
2044.18    0.241   245.70
2044.28    0.237   245.29
2044.38    0.234   244.86
2044.48    0.230   244.42
2044.58    0.226   243.97
2044.68    0.222   243.50
2044.78    0.218   243.01
2044.88    0.213   242.50
2044.98    0.209   241.97
2045.08    0.205   241.42
2045.18    0.200   240.85
2045.28    0.195   240.25
2045.38    0.191   239.61
2045.48    0.186   238.95

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 15:31:54