Double Star Calculator - Orbit

Orbital Elements for JEF1

WDS:	JEF1	WDS ID/Discoverer
P:	10.537	Orbital period (years)
a:	0.20400800000000002	Semi-major axis (arcseconds)
i:	111.452	Inclination (degrees)
Ω:	148.041	Longitude of ascending node (degrees)
T:	1980.475	Epoch of periastron passage (year)
e:	0.53971	Eccentricity
ω:	180.21	Longitude of periastron (degrees)
Start-Year:	2019.731523338699	Year
End-Year:	2030.268476661301	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for JEF1
Position:	152749.85+290619.8	Epoch-2000 right ascension and declination
WDS-ID:	15278+2906	WDS designation
Discoverer Code:	JEF1	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	137909	HD catalog number
Hipparcos number:	75695	Hipparcos catalog number
V1:	3.68	Magnitude of the primary
V2:	5.2	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	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:	Mut2010b	Reference

Double Star Orbit for JEF1

WDS 6th Orbit including measures of JEF1

-- 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 JEF1

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.286   154.53
--------------------------
2019.73    0.231   134.97
2019.83    0.223   134.12
2019.93    0.216   133.21
2020.03    0.208   132.23
2020.13    0.199   131.17
2020.23    0.191   130.02
2020.33    0.182   128.76
2020.43    0.173   127.37
2020.53    0.163   125.81
2020.63    0.153   124.06
2020.73    0.143   122.07
2020.83    0.133   119.77
2020.93    0.122   117.07
2021.03    0.112   113.87
2021.13    0.101   109.99
2021.23    0.090   105.19
2021.33    0.080    99.14
2021.43    0.071    91.38
2021.53    0.062    81.38
2021.63    0.056    68.70
2021.73    0.052    53.57
2021.83    0.052    37.36
2021.93    0.056    22.13
2022.03    0.061     9.22
2022.13    0.069   358.83
2022.23    0.076   350.50
2022.33    0.084   343.66
2022.43    0.089   337.81
2022.53    0.093   332.55
2022.63    0.094   327.55
2022.73    0.092   322.52
2022.83    0.088   317.16
2022.93    0.082   311.12
2023.03    0.075   303.99
2023.13    0.067   295.23
2023.23    0.060   284.26
2023.33    0.054   270.69
2023.43    0.052   254.96
2023.53    0.053   238.70
2023.63    0.057   223.97
2023.73    0.064   211.88
2023.83    0.073   202.44
2023.93    0.083   195.13
2024.03    0.093   189.42
2024.13    0.104   184.87
2024.23    0.114   181.18
2024.33    0.125   178.12
2024.43    0.136   175.53
2024.53    0.146   173.32
2024.63    0.156   171.40
2024.73    0.166   169.70
2024.83    0.175   168.20
2024.93    0.184   166.84
2025.03    0.193   165.61
2025.13    0.202   164.49
2025.23    0.210   163.46
2025.33    0.218   162.50
2025.43    0.225   161.61
2025.53    0.233   160.78
2025.63    0.240   159.99
2025.73    0.246   159.25
2025.83    0.252   158.54
2025.93    0.258   157.87
2026.03    0.264   157.23
2026.13    0.269   156.62
2026.23    0.274   156.02
2026.33    0.279   155.45
2026.43    0.284   154.90
2026.53    0.288   154.36
2026.63    0.291   153.84
2026.73    0.295   153.33
2026.83    0.298   152.83
2026.93    0.301   152.35
2027.03    0.304   151.87
2027.13    0.306   151.40
2027.23    0.308   150.93
2027.33    0.310   150.47
2027.43    0.311   150.02
2027.53    0.312   149.57
2027.63    0.313   149.12
2027.73    0.314   148.68
2027.83    0.314   148.23
2027.93    0.314   147.79
2028.03    0.314   147.34
2028.13    0.313   146.90
2028.23    0.312   146.45
2028.33    0.311   146.00
2028.43    0.310   145.55
2028.53    0.308   145.09
2028.63    0.306   144.62
2028.73    0.304   144.15
2028.83    0.301   143.67
2028.93    0.298   143.19
2029.03    0.295   142.69
2029.13    0.292   142.18
2029.23    0.288   141.66
2029.33    0.284   141.12
2029.43    0.279   140.57
2029.53    0.275   140.00
2029.63    0.270   139.41
2029.73    0.264   138.80
2029.83    0.259   138.16
2029.93    0.253   137.49
2030.03    0.247   136.79
2030.13    0.240   136.05
2030.23    0.233   135.27

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 17:15:43