Double Star Calculator - Orbit

Orbital Elements for LEI1BC

WDS:	LEI1BC	WDS ID/Discoverer
P:	17.247	Orbital period (years)
a:	0.4598	Semi-major axis (arcseconds)
i:	62.04	Inclination (degrees)
Ω:	14.82	Longitude of ascending node (degrees)
T:	2006.440	Epoch of periastron passage (year)
e:	0.0172	Eccentricity
ω:	202.53	Longitude of periastron (degrees)
Start-Year:	2016.3765	Year
End-Year:	2033.6235	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for LEI1BC
Position:	002444.24-270826.5	Epoch-2000 right ascension and declination
WDS-ID:	00247-2653	WDS designation
Discoverer Code:	LEI1BC	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	18.69	Magnitude of the primary
V2:	19.07	Magnitude of the secondary
Equinox:		Equinox
Date:	2017	Date of last observation
Orbit grade:	2	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2018j	Reference

Double Star Orbit for LEI1BC

WDS 6th Orbit including measures of LEI1BC

-- 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 LEI1BC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.219   270.04
--------------------------
2016.38    0.348    43.20
2016.48    0.339    44.95
2016.58    0.330    46.80
2016.68    0.321    48.75
2016.78    0.313    50.81
2016.88    0.304    52.99
2016.98    0.295    55.30
2017.08    0.286    57.75
2017.18    0.278    60.35
2017.28    0.270    63.11
2017.38    0.262    66.04
2017.48    0.254    69.15
2017.58    0.247    72.44
2017.68    0.241    75.92
2017.78    0.235    79.57
2017.88    0.230    83.41
2017.98    0.225    87.40
2018.08    0.222    91.54
2018.18    0.219    95.79
2018.28    0.218   100.13
2018.38    0.217   104.51
2018.48    0.217   108.90
2018.58    0.219   113.26
2018.68    0.221   117.55
2018.78    0.224   121.74
2018.88    0.228   125.79
2018.98    0.233   129.69
2019.08    0.238   133.42
2019.18    0.245   136.97
2019.28    0.251   140.33
2019.38    0.259   143.52
2019.48    0.266   146.52
2019.58    0.274   149.35
2019.68    0.283   152.02
2019.78    0.291   154.54
2019.88    0.300   156.91
2019.98    0.308   159.14
2020.08    0.317   161.26
2020.18    0.326   163.26
2020.28    0.335   165.16
2020.38    0.343   166.96
2020.48    0.352   168.68
2020.58    0.360   170.31
2020.68    0.368   171.88
2020.78    0.376   173.37
2020.88    0.383   174.81
2020.98    0.390   176.19
2021.08    0.397   177.53
2021.18    0.404   178.82
2021.28    0.410   180.07
2021.38    0.416   181.28
2021.48    0.421   182.46
2021.58    0.426   183.61
2021.68    0.431   184.73
2021.78    0.435   185.84
2021.88    0.439   186.92
2021.98    0.442   187.98
2022.08    0.445   189.03
2022.18    0.448   190.07
2022.28    0.450   191.10
2022.38    0.451   192.12
2022.48    0.452   193.13
2022.58    0.452   194.14
2022.68    0.452   195.15
2022.78    0.452   196.17
2022.88    0.451   197.18
2022.98    0.449   198.20
2023.08    0.447   199.23
2023.18    0.445   200.27
2023.28    0.442   201.32
2023.38    0.439   202.39
2023.48    0.435   203.47
2023.58    0.430   204.58
2023.68    0.426   205.71
2023.78    0.421   206.86
2023.88    0.415   208.05
2023.98    0.409   209.26
2024.08    0.403   210.52
2024.18    0.396   211.82
2024.28    0.389   213.16
2024.38    0.381   214.56
2024.48    0.374   216.01
2024.58    0.366   217.52
2024.68    0.358   219.10
2024.78    0.349   220.76
2024.88    0.341   222.49
2024.98    0.332   224.32
2025.08    0.323   226.25
2025.18    0.314   228.29
2025.28    0.305   230.45
2025.38    0.296   232.73
2025.48    0.288   235.16
2025.58    0.279   237.74
2025.68    0.271   240.48
2025.78    0.262   243.40
2025.88    0.255   246.49
2025.98    0.247   249.78
2026.08    0.240   253.26
2026.18    0.234   256.93
2026.28    0.229   260.80
2026.38    0.224   264.84
2026.48    0.220   269.04
2026.58    0.217   273.37
2026.68    0.215   277.80
2026.78    0.214   282.29
2026.88    0.214   286.80
2026.98    0.215   291.29
2027.08    0.217   295.71
2027.18    0.221   300.02
2027.28    0.225   304.20
2027.38    0.229   308.22
2027.48    0.235   312.06
2027.58    0.241   315.71
2027.68    0.248   319.17
2027.78    0.256   322.43
2027.88    0.264   325.50
2027.98    0.272   328.39
2028.08    0.280   331.10
2028.18    0.289   333.66
2028.28    0.298   336.06
2028.38    0.307   338.32
2028.48    0.316   340.45
2028.58    0.325   342.47
2028.68    0.334   344.37
2028.78    0.343   346.18
2028.88    0.352   347.89
2028.98    0.360   349.52
2029.08    0.369   351.08
2029.18    0.377   352.57
2029.28    0.385   353.99
2029.38    0.393   355.36
2029.48    0.400   356.68
2029.58    0.407   357.95
2029.68    0.414   359.17
2029.78    0.420     0.36
2029.88    0.427     1.51
2029.98    0.432     2.64
2030.08    0.437     3.73
2030.18    0.442     4.80
2030.28    0.447     5.84
2030.38    0.451     6.87
2030.48    0.454     7.88
2030.58    0.458     8.88
2030.68    0.460     9.86
2030.78    0.463    10.83
2030.88    0.464    11.79
2030.98    0.466    12.75
2031.08    0.467    13.70
2031.18    0.467    14.65
2031.28    0.467    15.60
2031.38    0.467    16.55
2031.48    0.466    17.50
2031.58    0.464    18.46
2031.68    0.462    19.42
2031.78    0.460    20.39
2031.88    0.457    21.38
2031.98    0.454    22.37
2032.08    0.450    23.39
2032.18    0.446    24.42
2032.28    0.442    25.46
2032.38    0.437    26.54
2032.48    0.432    27.63
2032.58    0.426    28.76
2032.68    0.420    29.92
2032.78    0.413    31.11
2032.88    0.407    32.34
2032.98    0.400    33.61
2033.08    0.392    34.93
2033.18    0.385    36.30
2033.28    0.377    37.73
2033.38    0.369    39.22
2033.48    0.360    40.77
2033.58    0.352    42.41

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 14:39:00