Double Star Calculator - Orbit

Orbital Elements for WSI73

WDS:	WSI73	WDS ID/Discoverer
P:	12.715	Orbital period (years)
a:	0.1294	Semi-major axis (arcseconds)
i:	85.9	Inclination (degrees)
Ω:	93.1	Longitude of ascending node (degrees)
T:	2018.150	Epoch of periastron passage (year)
e:	0.627	Eccentricity
ω:	42.7	Longitude of periastron (degrees)
Start-Year:	2018.6425	Year
End-Year:	2031.3575	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for WSI73
Position:	092505.39-125800.5	Epoch-2000 right ascension and declination
WDS-ID:	09252-1258	WDS designation
Discoverer Code:	WSI73	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	81408	HD catalog number
Hipparcos number:	46191	Hipparcos catalog number
V1:	10.1	Magnitude of the primary
V2:	11.1	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:	Tok2020e	Reference

Double Star Orbit for WSI73

WDS 6th Orbit including measures of WSI73

-- 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 WSI73

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.098   280.20
--------------------------
2018.64    0.020   260.64
2018.74    0.031   265.04
2018.84    0.041   267.15
2018.94    0.051   268.41
2019.04    0.060   269.27
2019.14    0.069   269.91
2019.24    0.077   270.40
2019.34    0.085   270.80
2019.44    0.092   271.14
2019.54    0.099   271.43
2019.64    0.105   271.68
2019.74    0.111   271.91
2019.84    0.117   272.11
2019.94    0.122   272.29
2020.04    0.127   272.46
2020.14    0.132   272.62
2020.24    0.136   272.77
2020.34    0.140   272.90
2020.44    0.144   273.04
2020.54    0.147   273.16
2020.64    0.151   273.28
2020.74    0.154   273.39
2020.84    0.156   273.50
2020.94    0.159   273.61
2021.04    0.161   273.71
2021.14    0.164   273.81
2021.24    0.166   273.91
2021.34    0.167   274.01
2021.44    0.169   274.10
2021.54    0.170   274.19
2021.64    0.172   274.28
2021.74    0.173   274.37
2021.84    0.174   274.46
2021.94    0.175   274.54
2022.04    0.175   274.63
2022.14    0.176   274.72
2022.24    0.176   274.80
2022.34    0.177   274.89
2022.44    0.177   274.97
2022.54    0.177   275.05
2022.64    0.177   275.14
2022.74    0.177   275.22
2022.84    0.176   275.31
2022.94    0.176   275.39
2023.04    0.175   275.48
2023.14    0.174   275.57
2023.24    0.174   275.65
2023.34    0.173   275.74
2023.44    0.172   275.83
2023.54    0.171   275.92
2023.64    0.169   276.01
2023.74    0.168   276.10
2023.84    0.167   276.20
2023.94    0.165   276.29
2024.04    0.164   276.39
2024.14    0.162   276.49
2024.24    0.160   276.59
2024.34    0.158   276.70
2024.44    0.156   276.80
2024.54    0.154   276.91
2024.64    0.152   277.03
2024.74    0.150   277.14
2024.84    0.148   277.26
2024.94    0.145   277.38
2025.04    0.143   277.51
2025.14    0.140   277.64
2025.24    0.138   277.78
2025.34    0.135   277.92
2025.44    0.132   278.07
2025.54    0.129   278.22
2025.64    0.126   278.39
2025.74    0.123   278.56
2025.84    0.120   278.73
2025.94    0.117   278.92
2026.04    0.114   279.12
2026.14    0.110   279.33
2026.24    0.107   279.55
2026.34    0.104   279.79
2026.44    0.100   280.05
2026.54    0.096   280.32
2026.64    0.093   280.61
2026.74    0.089   280.93
2026.84    0.085   281.28
2026.94    0.081   281.66
2027.04    0.078   282.08
2027.14    0.074   282.54
2027.24    0.070   283.06
2027.34    0.065   283.64
2027.44    0.061   284.29
2027.54    0.057   285.05
2027.64    0.053   285.92
2027.74    0.049   286.95
2027.84    0.044   288.17
2027.94    0.040   289.66
2028.04    0.036   291.51
2028.14    0.031   293.88
2028.24    0.027   297.00
2028.34    0.023   301.31
2028.44    0.019   307.54
2028.54    0.015   317.09
2028.64    0.012   332.39
2028.74    0.010   355.67
2028.84    0.010    22.85
2028.94    0.012    44.40
2029.04    0.016    58.21
2029.14    0.019    66.89
2029.24    0.024    72.64
2029.34    0.028    76.68
2029.44    0.032    79.66
2029.54    0.036    81.95
2029.64    0.040    83.78
2029.74    0.044    85.29
2029.84    0.047    86.56
2029.94    0.051    87.66
2030.04    0.053    88.64
2030.14    0.056    89.53
2030.24    0.057    90.36
2030.34    0.058    91.16
2030.44    0.057    91.97
2030.54    0.055    92.81
2030.64    0.051    93.75
2030.74    0.045    94.89
2030.84    0.038    96.43
2030.94    0.028    98.91
2031.04    0.018   104.22
2031.14    0.007   126.43
2031.24    0.007   238.65
2031.34    0.018   259.51

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 16:18:00