Double Star Calculator - Orbit

Orbital Elements for ELP40

WDS:	ELP40	WDS ID/Discoverer
P:	19.830	Orbital period (years)
a:	0.1176	Semi-major axis (arcseconds)
i:	141.27	Inclination (degrees)
Ω:	218.4	Longitude of ascending node (degrees)
T:	2029.060	Epoch of periastron passage (year)
e:	0.2394	Eccentricity
ω:	11.6	Longitude of periastron (degrees)
Start-Year:	2015.085	Year
End-Year:	2034.915	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for ELP40
Position:	171503.61-274939.7	Epoch-2000 right ascension and declination
WDS-ID:	17151-2750	WDS designation
Discoverer Code:	ELP40	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.06	Magnitude of the primary
V2:	8.22	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	TAD2023	Reference

Double Star Orbit for ELP40

WDS 6th Orbit including measures of ELP40

-- 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 ELP40

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.087   270.91
--------------------------
2015.09    0.121    70.22
2015.18    0.122    68.92
2015.28    0.123    67.66
2015.38    0.124    66.42
2015.48    0.126    65.20
2015.58    0.127    64.01
2015.68    0.128    62.84
2015.78    0.129    61.69
2015.88    0.130    60.56
2015.98    0.131    59.45
2016.08    0.132    58.36
2016.18    0.133    57.28
2016.28    0.134    56.22
2016.38    0.135    55.17
2016.48    0.136    54.14
2016.58    0.137    53.12
2016.68    0.138    52.11
2016.78    0.139    51.12
2016.88    0.139    50.13
2016.98    0.140    49.15
2017.08    0.141    48.19
2017.18    0.141    47.23
2017.28    0.142    46.28
2017.38    0.142    45.34
2017.48    0.143    44.40
2017.58    0.143    43.47
2017.68    0.144    42.54
2017.78    0.144    41.62
2017.88    0.144    40.71
2017.98    0.144    39.79
2018.08    0.145    38.88
2018.18    0.145    37.98
2018.28    0.145    37.07
2018.38    0.145    36.17
2018.48    0.145    35.27
2018.58    0.145    34.37
2018.68    0.145    33.46
2018.78    0.145    32.56
2018.88    0.145    31.66
2018.98    0.145    30.75
2019.08    0.145    29.85
2019.18    0.145    28.94
2019.28    0.144    28.03
2019.38    0.144    27.11
2019.48    0.144    26.19
2019.58    0.143    25.27
2019.68    0.143    24.34
2019.78    0.142    23.40
2019.88    0.142    22.46
2019.98    0.141    21.51
2020.08    0.141    20.55
2020.18    0.140    19.59
2020.28    0.140    18.62
2020.38    0.139    17.64
2020.48    0.138    16.64
2020.58    0.137    15.64
2020.68    0.137    14.63
2020.78    0.136    13.60
2020.88    0.135    12.57
2020.98    0.134    11.52
2021.08    0.133    10.45
2021.18    0.132     9.37
2021.28    0.131     8.28
2021.38    0.130     7.17
2021.48    0.129     6.04
2021.58    0.128     4.89
2021.68    0.127     3.73
2021.78    0.126     2.54
2021.88    0.125     1.34
2021.98    0.124     0.11
2022.08    0.123   358.86
2022.18    0.122   357.59
2022.28    0.120   356.29
2022.38    0.119   354.97
2022.48    0.118   353.62
2022.58    0.117   352.24
2022.68    0.116   350.84
2022.78    0.114   349.40
2022.88    0.113   347.93
2022.98    0.112   346.44
2023.08    0.111   344.90
2023.18    0.110   343.34
2023.28    0.108   341.73
2023.38    0.107   340.10
2023.48    0.106   338.42
2023.58    0.105   336.70
2023.68    0.104   334.95
2023.78    0.102   333.16
2023.88    0.101   331.32
2023.98    0.100   329.45
2024.08    0.099   327.53
2024.18    0.098   325.57
2024.28    0.097   323.56
2024.38    0.096   321.52
2024.48    0.095   319.43
2024.58    0.094   317.30
2024.68    0.093   315.13
2024.78    0.092   312.92
2024.88    0.092   310.68
2024.98    0.091   308.39
2025.08    0.090   306.07
2025.18    0.090   303.71
2025.28    0.089   301.33
2025.38    0.088   298.91
2025.48    0.088   296.47
2025.58    0.088   294.01
2025.68    0.087   291.52
2025.78    0.087   289.02
2025.88    0.087   286.50
2025.98    0.087   283.98
2026.08    0.087   281.44
2026.18    0.087   278.90
2026.28    0.087   276.36
2026.38    0.087   273.82
2026.48    0.087   271.29
2026.58    0.087   268.76
2026.68    0.087   266.24
2026.78    0.087   263.73
2026.88    0.087   261.23
2026.98    0.088   258.74
2027.08    0.088   256.27
2027.18    0.088   253.82
2027.28    0.088   251.38
2027.38    0.089   248.95
2027.48    0.089   246.54
2027.58    0.089   244.14
2027.68    0.089   241.75
2027.78    0.090   239.38
2027.88    0.090   237.01
2027.98    0.090   234.66
2028.08    0.090   232.31
2028.18    0.090   229.97
2028.28    0.090   227.63
2028.38    0.090   225.29
2028.48    0.090   222.94
2028.58    0.090   220.60
2028.68    0.090   218.24
2028.78    0.090   215.88
2028.88    0.089   213.50
2028.98    0.089   211.11
2029.08    0.089   208.70
2029.18    0.088   206.27
2029.28    0.088   203.81
2029.38    0.087   201.33
2029.48    0.087   198.82
2029.58    0.086   196.28
2029.68    0.086   193.71
2029.78    0.085   191.11
2029.88    0.085   188.46
2029.98    0.084   185.79
2030.08    0.083   183.07
2030.18    0.083   180.32
2030.28    0.082   177.53
2030.38    0.082   174.70
2030.48    0.081   171.84
2030.58    0.081   168.95
2030.68    0.081   166.03
2030.78    0.080   163.09
2030.88    0.080   160.12
2030.98    0.080   157.14
2031.08    0.080   154.15
2031.18    0.080   151.16
2031.28    0.080   148.16
2031.38    0.080   145.18
2031.48    0.080   142.21
2031.58    0.080   139.26
2031.68    0.081   136.33
2031.78    0.081   133.44
2031.88    0.082   130.59
2031.98    0.083   127.79
2032.08    0.083   125.03
2032.18    0.084   122.33
2032.28    0.085   119.68
2032.38    0.086   117.08
2032.48    0.087   114.55
2032.58    0.088   112.08
2032.68    0.089   109.68
2032.78    0.091   107.33
2032.88    0.092   105.05
2032.98    0.093   102.84
2033.08    0.095   100.68
2033.18    0.096    98.58
2033.28    0.097    96.55
2033.38    0.099    94.57
2033.48    0.100    92.65
2033.58    0.102    90.78
2033.68    0.103    88.97
2033.78    0.105    87.21
2033.88    0.106    85.49
2033.98    0.108    83.82
2034.08    0.109    82.20
2034.18    0.110    80.62
2034.28    0.112    79.08
2034.38    0.113    77.58
2034.48    0.115    76.12
2034.58    0.116    74.69
2034.68    0.118    73.30
2034.78    0.119    71.94
2034.88    0.120    70.61

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 17:35:18