Double Star Calculator - Orbit

Orbital Elements for SP1AB

WDS:	SP1AB	WDS ID/Discoverer
P:	15.074	Orbital period (years)
a:	0.252	Semi-major axis (arcseconds)
i:	49.655	Inclination (degrees)
Ω:	288.568	Longitude of ascending node (degrees)
T:	1900.812	Epoch of periastron passage (year)
e:	0.654	Eccentricity
ω:	85.265	Longitude of periastron (degrees)
Start-Year:	2017.463	Year
End-Year:	2032.537	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for SP1AB
Position:	084646.51+062507.7	Epoch-2000 right ascension and declination
WDS-ID:	08468+0625	WDS designation
Discoverer Code:	SP1AB	Discover designation and components
ADS number:	6993	Aitken Double Star catalog
HD number:	74874	HD catalog number
Hipparcos number:	43109	Hipparcos catalog number
V1:	3.5	Magnitude of the primary
V2:	5.6	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	1	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	JAA2023	Reference

Double Star Orbit for SP1AB

WDS 6th Orbit including measures of SP1AB

-- 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 SP1AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.272   166.95
--------------------------
2017.46    0.245   230.70
2017.56    0.244   231.94
2017.66    0.243   233.19
2017.76    0.241   234.46
2017.86    0.240   235.75
2017.96    0.238   237.05
2018.06    0.237   238.37
2018.16    0.235   239.70
2018.26    0.233   241.06
2018.36    0.231   242.43
2018.46    0.229   243.83
2018.56    0.227   245.25
2018.66    0.225   246.70
2018.76    0.223   248.18
2018.86    0.221   249.69
2018.96    0.218   251.23
2019.06    0.215   252.81
2019.16    0.213   254.43
2019.26    0.210   256.10
2019.36    0.206   257.82
2019.46    0.203   259.59
2019.56    0.199   261.43
2019.66    0.195   263.34
2019.76    0.191   265.33
2019.86    0.186   267.41
2019.96    0.181   269.61
2020.06    0.176   271.93
2020.16    0.170   274.40
2020.26    0.164   277.06
2020.36    0.157   279.94
2020.46    0.150   283.10
2020.56    0.141   286.61
2020.66    0.132   290.57
2020.76    0.122   295.15
2020.86    0.112   300.58
2020.96    0.100   307.23
2021.06    0.088   315.68
2021.16    0.076   326.85
2021.26    0.065   342.01
2021.36    0.058     1.98
2021.46    0.057    24.95
2021.56    0.062    46.21
2021.66    0.072    62.79
2021.76    0.085    74.96
2021.86    0.097    83.99
2021.96    0.110    90.95
2022.06    0.121    96.52
2022.16    0.133   101.13
2022.26    0.143   105.05
2022.36    0.152   108.47
2022.46    0.161   111.50
2022.56    0.169   114.23
2022.66    0.176   116.72
2022.76    0.183   119.02
2022.86    0.190   121.16
2022.96    0.196   123.16
2023.06    0.201   125.04
2023.16    0.206   126.83
2023.26    0.211   128.54
2023.36    0.216   130.17
2023.46    0.220   131.74
2023.56    0.224   133.25
2023.66    0.227   134.71
2023.76    0.231   136.13
2023.86    0.234   137.50
2023.96    0.237   138.84
2024.06    0.240   140.15
2024.16    0.242   141.43
2024.26    0.245   142.68
2024.36    0.247   143.91
2024.46    0.249   145.11
2024.56    0.251   146.30
2024.66    0.253   147.46
2024.76    0.255   148.61
2024.86    0.257   149.75
2024.96    0.258   150.87
2025.06    0.260   151.97
2025.16    0.261   153.07
2025.26    0.262   154.15
2025.36    0.264   155.23
2025.46    0.265   156.29
2025.56    0.266   157.35
2025.66    0.267   158.40
2025.76    0.267   159.44
2025.86    0.268   160.47
2025.96    0.269   161.50
2026.06    0.270   162.53
2026.16    0.270   163.55
2026.26    0.271   164.56
2026.36    0.271   165.57
2026.46    0.272   166.58
2026.56    0.272   167.58
2026.66    0.273   168.59
2026.76    0.273   169.58
2026.86    0.273   170.58
2026.96    0.273   171.58
2027.06    0.273   172.57
2027.16    0.274   173.56
2027.26    0.274   174.56
2027.36    0.274   175.55
2027.46    0.274   176.54
2027.56    0.274   177.53
2027.66    0.274   178.52
2027.76    0.274   179.51
2027.86    0.274   180.50
2027.96    0.274   181.49
2028.06    0.273   182.49
2028.16    0.273   183.48
2028.26    0.273   184.48
2028.36    0.273   185.47
2028.46    0.273   186.47
2028.56    0.272   187.47
2028.66    0.272   188.48
2028.76    0.272   189.48
2028.86    0.271   190.49
2028.96    0.271   191.50
2029.06    0.271   192.51
2029.16    0.270   193.53
2029.26    0.270   194.55
2029.36    0.269   195.57
2029.46    0.269   196.59
2029.56    0.269   197.62
2029.66    0.268   198.65
2029.76    0.268   199.69
2029.86    0.267   200.73
2029.96    0.267   201.77
2030.06    0.266   202.82
2030.16    0.265   203.87
2030.26    0.265   204.93
2030.36    0.264   205.99
2030.46    0.264   207.05
2030.56    0.263   208.13
2030.66    0.262   209.20
2030.76    0.262   210.28
2030.86    0.261   211.37
2030.96    0.260   212.47
2031.06    0.259   213.57
2031.16    0.259   214.67
2031.26    0.258   215.79
2031.36    0.257   216.91
2031.46    0.256   218.03
2031.56    0.255   219.17
2031.66    0.254   220.31
2031.76    0.254   221.46
2031.86    0.253   222.62
2031.96    0.252   223.79
2032.06    0.251   224.97
2032.16    0.250   226.16
2032.26    0.248   227.36
2032.36    0.247   228.56
2032.46    0.246   229.79

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 16:10:55