Double Star Calculator - Orbit

Orbital Elements for SPF2

WDS:	SPF2	WDS ID/Discoverer
P:	32.000	Orbital period (years)
a:	0.147	Semi-major axis (arcseconds)
i:	45.0	Inclination (degrees)
Ω:	327.0	Longitude of ascending node (degrees)
T:	2005.776	Epoch of periastron passage (year)
e:	0.005	Eccentricity
ω:	98.0	Longitude of periastron (degrees)
Start-Year:	2009.0	Year
End-Year:	2041.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for SPF2
Position:	205235.31-160929.8	Epoch-2000 right ascension and declination
WDS-ID:	20526-1609	WDS designation
Discoverer Code:	SPF2	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	15.57k	Magnitude of the primary
V2:	16.30k	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2010	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	BGg2015	Reference

Double Star Orbit for SPF2

WDS 6th Orbit including measures of SPF2

-- 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 SPF2

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.138   305.34
--------------------------
2009.00    0.127   111.36
2009.10    0.127   112.43
2009.20    0.128   113.48
2009.30    0.129   114.52
2009.40    0.130   115.55
2009.50    0.131   116.56
2009.60    0.131   117.56
2009.70    0.132   118.55
2009.80    0.133   119.53
2009.90    0.134   120.50
2010.00    0.135   121.45
2010.10    0.135   122.40
2010.20    0.136   123.33
2010.30    0.137   124.26
2010.40    0.137   125.17
2010.50    0.138   126.08
2010.60    0.139   126.98
2010.70    0.139   127.87
2010.80    0.140   128.75
2010.90    0.140   129.62
2011.00    0.141   130.49
2011.10    0.142   131.35
2011.20    0.142   132.21
2011.30    0.143   133.05
2011.40    0.143   133.90
2011.50    0.143   134.73
2011.60    0.144   135.57
2011.70    0.144   136.39
2011.80    0.145   137.22
2011.90    0.145   138.04
2012.00    0.145   138.85
2012.10    0.146   139.67
2012.20    0.146   140.48
2012.30    0.146   141.28
2012.40    0.146   142.09
2012.50    0.146   142.89
2012.60    0.147   143.69
2012.70    0.147   144.49
2012.80    0.147   145.29
2012.90    0.147   146.08
2013.00    0.147   146.88
2013.10    0.147   147.68
2013.20    0.147   148.47
2013.30    0.147   149.27
2013.40    0.147   150.07
2013.50    0.147   150.87
2013.60    0.146   151.67
2013.70    0.146   152.47
2013.80    0.146   153.27
2013.90    0.146   154.08
2014.00    0.146   154.89
2014.10    0.145   155.70
2014.20    0.145   156.52
2014.30    0.145   157.33
2014.40    0.144   158.16
2014.50    0.144   158.98
2014.60    0.144   159.81
2014.70    0.143   160.65
2014.80    0.143   161.49
2014.90    0.142   162.34
2015.00    0.142   163.19
2015.10    0.141   164.05
2015.20    0.141   164.91
2015.30    0.140   165.78
2015.40    0.140   166.66
2015.50    0.139   167.55
2015.60    0.138   168.44
2015.70    0.138   169.35
2015.80    0.137   170.26
2015.90    0.136   171.18
2016.00    0.136   172.11
2016.10    0.135   173.05
2016.20    0.134   174.00
2016.30    0.133   174.96
2016.40    0.133   175.93
2016.50    0.132   176.91
2016.60    0.131   177.91
2016.70    0.130   178.91
2016.80    0.130   179.93
2016.90    0.129   180.96
2017.00    0.128   182.01
2017.10    0.127   183.06
2017.20    0.126   184.14
2017.30    0.125   185.22
2017.40    0.125   186.32
2017.50    0.124   187.44
2017.60    0.123   188.57
2017.70    0.122   189.71
2017.80    0.121   190.87
2017.90    0.120   192.05
2018.00    0.120   193.24
2018.10    0.119   194.45
2018.20    0.118   195.68
2018.30    0.117   196.92
2018.40    0.116   198.18
2018.50    0.116   199.46
2018.60    0.115   200.75
2018.70    0.114   202.07
2018.80    0.113   203.39
2018.90    0.113   204.74
2019.00    0.112   206.10
2019.10    0.111   207.48
2019.20    0.111   208.87
2019.30    0.110   210.28
2019.40    0.110   211.71
2019.50    0.109   213.15
2019.60    0.108   214.60
2019.70    0.108   216.07
2019.80    0.107   217.55
2019.90    0.107   219.05
2020.00    0.107   220.55
2020.10    0.106   222.07
2020.20    0.106   223.60
2020.30    0.106   225.14
2020.40    0.105   226.69
2020.50    0.105   228.24
2020.60    0.105   229.80
2020.70    0.105   231.37
2020.80    0.105   232.94
2020.90    0.105   234.51
2021.00    0.104   236.08
2021.10    0.104   237.66
2021.20    0.105   239.23
2021.30    0.105   240.81
2021.40    0.105   242.38
2021.50    0.105   243.94
2021.60    0.105   245.50
2021.70    0.105   247.06
2021.80    0.106   248.61
2021.90    0.106   250.15
2022.00    0.106   251.67
2022.10    0.107   253.19
2022.20    0.107   254.70
2022.30    0.107   256.20
2022.40    0.108   257.68
2022.50    0.108   259.15
2022.60    0.109   260.61
2022.70    0.109   262.05
2022.80    0.110   263.48
2022.90    0.111   264.89
2023.00    0.111   266.28
2023.10    0.112   267.66
2023.20    0.113   269.02
2023.30    0.113   270.37
2023.40    0.114   271.70
2023.50    0.115   273.01
2023.60    0.116   274.31
2023.70    0.116   275.59
2023.80    0.117   276.85
2023.90    0.118   278.09
2024.00    0.119   279.32
2024.10    0.120   280.53
2024.20    0.120   281.72
2024.30    0.121   282.90
2024.40    0.122   284.06
2024.50    0.123   285.21
2024.60    0.124   286.34
2024.70    0.125   287.46
2024.80    0.125   288.56
2024.90    0.126   289.65
2025.00    0.127   290.72
2025.10    0.128   291.78
2025.20    0.129   292.82
2025.30    0.129   293.85
2025.40    0.130   294.87
2025.50    0.131   295.88
2025.60    0.132   296.87
2025.70    0.133   297.86
2025.80    0.133   298.83
2025.90    0.134   299.79
2026.00    0.135   300.74
2026.10    0.136   301.68
2026.20    0.136   302.61
2026.30    0.137   303.53
2026.40    0.138   304.44
2026.50    0.138   305.34
2026.60    0.139   306.24
2026.70    0.140   307.12
2026.80    0.140   308.00
2026.90    0.141   308.87
2027.00    0.141   309.74
2027.10    0.142   310.60
2027.20    0.142   311.45
2027.30    0.143   312.29
2027.40    0.143   313.13
2027.50    0.144   313.97
2027.60    0.144   314.80
2027.70    0.145   315.62
2027.80    0.145   316.44
2027.90    0.145   317.26
2028.00    0.146   318.08
2028.10    0.146   318.89
2028.20    0.146   319.69
2028.30    0.146   320.50
2028.40    0.146   321.30
2028.50    0.147   322.10
2028.60    0.147   322.90
2028.70    0.147   323.70
2028.80    0.147   324.49
2028.90    0.147   325.29
2029.00    0.147   326.08
2029.10    0.147   326.88
2029.20    0.147   327.67
2029.30    0.147   328.46
2029.40    0.147   329.26
2029.50    0.147   330.06
2029.60    0.147   330.85
2029.70    0.147   331.65
2029.80    0.146   332.46
2029.90    0.146   333.26
2030.00    0.146   334.07
2030.10    0.146   334.88
2030.20    0.145   335.69
2030.30    0.145   336.50
2030.40    0.145   337.32
2030.50    0.144   338.15
2030.60    0.144   338.98
2030.70    0.143   339.81
2030.80    0.143   340.65
2030.90    0.142   341.49
2031.00    0.142   342.34
2031.10    0.141   343.20
2031.20    0.141   344.06
2031.30    0.140   344.93
2031.40    0.140   345.81
2031.50    0.139   346.69
2031.60    0.138   347.59
2031.70    0.138   348.49
2031.80    0.137   349.40
2031.90    0.136   350.32
2032.00    0.136   351.25
2032.10    0.135   352.19
2032.20    0.134   353.13
2032.30    0.133   354.09
2032.40    0.133   355.06
2032.50    0.132   356.05
2032.60    0.131   357.04
2032.70    0.130   358.05
2032.80    0.129   359.07
2032.90    0.129     0.10
2033.00    0.128     1.14
2033.10    0.127     2.20
2033.20    0.126     3.28
2033.30    0.125     4.36
2033.40    0.124     5.47
2033.50    0.124     6.58
2033.60    0.123     7.72
2033.70    0.122     8.87
2033.80    0.121    10.03
2033.90    0.120    11.22
2034.00    0.119    12.42
2034.10    0.118    13.63
2034.20    0.118    14.87
2034.30    0.117    16.12
2034.40    0.116    17.39
2034.50    0.115    18.67
2034.60    0.114    19.98
2034.70    0.114    21.30
2034.80    0.113    22.64
2034.90    0.112    24.00
2035.00    0.111    25.37
2035.10    0.111    26.76
2035.20    0.110    28.17
2035.30    0.109    29.60
2035.40    0.109    31.04
2035.50    0.108    32.50
2035.60    0.108    33.98
2035.70    0.107    35.47
2035.80    0.107    36.97
2035.90    0.106    38.49
2036.00    0.106    40.02
2036.10    0.105    41.57
2036.20    0.105    43.12
2036.30    0.105    44.69
2036.40    0.104    46.26
2036.50    0.104    47.84
2036.60    0.104    49.43
2036.70    0.104    51.03
2036.80    0.104    52.63
2036.90    0.103    54.23
2037.00    0.103    55.84
2037.10    0.103    57.44
2037.20    0.103    59.05
2037.30    0.104    60.66
2037.40    0.104    62.26
2037.50    0.104    63.86
2037.60    0.104    65.45
2037.70    0.104    67.03
2037.80    0.104    68.61
2037.90    0.105    70.18
2038.00    0.105    71.74
2038.10    0.106    73.29
2038.20    0.106    74.83
2038.30    0.106    76.36
2038.40    0.107    77.87
2038.50    0.107    79.37
2038.60    0.108    80.85
2038.70    0.109    82.32
2038.80    0.109    83.77
2038.90    0.110    85.20
2039.00    0.110    86.62
2039.10    0.111    88.02
2039.20    0.112    89.41
2039.30    0.113    90.78
2039.40    0.113    92.12
2039.50    0.114    93.46
2039.60    0.115    94.77
2039.70    0.116    96.07
2039.80    0.116    97.34
2039.90    0.117    98.60
2040.00    0.118    99.85
2040.10    0.119   101.07
2040.20    0.120   102.28
2040.30    0.121   103.47
2040.40    0.121   104.65
2040.50    0.122   105.81
2040.60    0.123   106.95
2040.70    0.124   108.07
2040.80    0.125   109.19
2040.90    0.126   110.28

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 18:19:36