Double Star Calculator - Orbit

Orbital Elements for YSC155

WDS:	YSC155	WDS ID/Discoverer
P:	10.772	Orbital period (years)
a:	0.0655	Semi-major axis (arcseconds)
i:	118.0	Inclination (degrees)
Ω:	149.1	Longitude of ascending node (degrees)
T:	2021.631	Epoch of periastron passage (year)
e:	0.738	Eccentricity
ω:	12.8	Longitude of periastron (degrees)
Start-Year:	2019.614	Year
End-Year:	2030.386	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for YSC155
Position:	164301.31-085704.4	Epoch-2000 right ascension and declination
WDS-ID:	16430-0857	WDS designation
Discoverer Code:	YSC155	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	150686	HD catalog number
Hipparcos number:	81843	Hipparcos catalog number
V1:	8.9	Magnitude of the primary
V2:	10.8	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:	Msn2023	Reference

Double Star Orbit for YSC155

WDS 6th Orbit including measures of YSC155

-- 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 YSC155

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.112   324.88
--------------------------
2019.61    0.063   304.35
2019.71    0.060   303.15
2019.81    0.057   301.84
2019.91    0.054   300.38
2020.01    0.051   298.74
2020.11    0.048   296.90
2020.21    0.045   294.78
2020.31    0.041   292.33
2020.41    0.038   289.43
2020.51    0.034   285.96
2020.61    0.031   281.70
2020.71    0.027   276.34
2020.81    0.024   269.43
2020.91    0.021   260.32
2021.01    0.018   248.16
2021.11    0.016   232.35
2021.21    0.015   213.46
2021.31    0.015   193.90
2021.41    0.017   176.15
2021.51    0.018   160.62
2021.61    0.017   145.70
2021.71    0.015   128.12
2021.81    0.012   103.00
2021.91    0.012    69.57
2022.01    0.014    40.40
2022.11    0.018    22.14
2022.21    0.023    11.11
2022.31    0.028     3.93
2022.41    0.033   358.90
2022.51    0.037   355.14
2022.61    0.042   352.20
2022.71    0.046   349.82
2022.81    0.050   347.83
2022.91    0.054   346.13
2023.01    0.057   344.66
2023.11    0.061   343.36
2023.21    0.064   342.19
2023.31    0.067   341.14
2023.41    0.070   340.18
2023.51    0.073   339.30
2023.61    0.076   338.48
2023.71    0.079   337.72
2023.81    0.081   337.01
2023.91    0.083   336.34
2024.01    0.086   335.70
2024.11    0.088   335.10
2024.21    0.090   334.52
2024.31    0.092   333.97
2024.41    0.094   333.44
2024.51    0.095   332.93
2024.61    0.097   332.44
2024.71    0.098   331.96
2024.81    0.100   331.50
2024.91    0.101   331.05
2025.01    0.102   330.61
2025.11    0.104   330.19
2025.21    0.105   329.77
2025.31    0.106   329.36
2025.41    0.107   328.96
2025.51    0.108   328.56
2025.61    0.108   328.17
2025.71    0.109   327.79
2025.81    0.110   327.41
2025.91    0.110   327.03
2026.01    0.111   326.66
2026.11    0.111   326.29
2026.21    0.111   325.92
2026.31    0.112   325.56
2026.41    0.112   325.20
2026.51    0.112   324.83
2026.61    0.112   324.47
2026.71    0.112   324.11
2026.81    0.112   323.75
2026.91    0.112   323.39
2027.01    0.112   323.02
2027.11    0.111   322.66
2027.21    0.111   322.29
2027.31    0.111   321.92
2027.41    0.110   321.55
2027.51    0.110   321.17
2027.61    0.109   320.79
2027.71    0.108   320.40
2027.81    0.107   320.01
2027.91    0.107   319.62
2028.01    0.106   319.21
2028.11    0.105   318.80
2028.21    0.104   318.39
2028.31    0.103   317.96
2028.41    0.101   317.52
2028.51    0.100   317.08
2028.61    0.099   316.62
2028.71    0.098   316.15
2028.81    0.096   315.66
2028.91    0.095   315.16
2029.01    0.093   314.65
2029.11    0.091   314.11
2029.21    0.090   313.56
2029.31    0.088   312.98
2029.41    0.086   312.37
2029.51    0.084   311.74
2029.61    0.082   311.08
2029.71    0.080   310.38
2029.81    0.077   309.64
2029.91    0.075   308.86
2030.01    0.073   308.03
2030.11    0.070   307.14
2030.21    0.068   306.18
2030.31    0.065   305.15

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 17:30:23