Double Star Calculator - Orbit

Orbital Elements for BUG9

WDS:	BUG9	WDS ID/Discoverer
P:	11.100	Orbital period (years)
a:	0.08	Semi-major axis (arcseconds)
i:	91.3	Inclination (degrees)
Ω:	133.4	Longitude of ascending node (degrees)
T:	2024.519	Epoch of periastron passage (year)
e:	0.48	Eccentricity
ω:	277.0	Longitude of periastron (degrees)
Start-Year:	2019.45	Year
End-Year:	2030.55	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BUG9
Position:	092615.37+584721.2	Epoch-2000 right ascension and declination
WDS-ID:	09263+5847	WDS designation
Discoverer Code:	BUG9	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	17.14	Magnitude of the primary
V2:	17.54	Magnitude of the secondary
Equinox:		Equinox
Date:	2010	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Dup2017	Reference

Double Star Orbit for BUG9

WDS 6th Orbit including measures of BUG9

-- 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 BUG9

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.065   132.41
--------------------------
2019.45    0.027   318.90
2019.55    0.030   318.38
2019.65    0.032   317.95
2019.75    0.035   317.58
2019.85    0.037   317.26
2019.95    0.040   316.98
2020.05    0.042   316.73
2020.15    0.044   316.51
2020.25    0.046   316.31
2020.35    0.049   316.12
2020.45    0.051   315.96
2020.55    0.053   315.80
2020.65    0.055   315.66
2020.75    0.057   315.53
2020.85    0.059   315.41
2020.95    0.061   315.29
2021.05    0.062   315.18
2021.15    0.064   315.08
2021.25    0.066   314.98
2021.35    0.067   314.89
2021.45    0.069   314.80
2021.55    0.070   314.71
2021.65    0.071   314.63
2021.75    0.072   314.55
2021.85    0.073   314.47
2021.95    0.074   314.39
2022.05    0.074   314.32
2022.15    0.075   314.24
2022.25    0.075   314.17
2022.35    0.075   314.10
2022.45    0.075   314.02
2022.55    0.075   313.95
2022.65    0.074   313.87
2022.75    0.073   313.80
2022.85    0.072   313.72
2022.95    0.071   313.64
2023.05    0.069   313.55
2023.15    0.067   313.46
2023.25    0.065   313.37
2023.35    0.062   313.27
2023.45    0.059   313.15
2023.55    0.055   313.02
2023.65    0.051   312.88
2023.75    0.046   312.70
2023.85    0.041   312.48
2023.95    0.035   312.20
2024.05    0.029   311.79
2024.15    0.022   311.16
2024.25    0.015   309.95
2024.35    0.008   306.51
2024.45    0.001   235.32
2024.55    0.007   140.56
2024.65    0.015   136.84
2024.75    0.022   135.58
2024.85    0.029   134.92
2024.95    0.035   134.50
2025.05    0.040   134.21
2025.15    0.045   133.98
2025.25    0.049   133.80
2025.35    0.053   133.64
2025.45    0.056   133.50
2025.55    0.059   133.37
2025.65    0.061   133.26
2025.75    0.063   133.15
2025.85    0.064   133.05
2025.95    0.065   132.95
2026.05    0.065   132.85
2026.15    0.066   132.75
2026.25    0.066   132.66
2026.35    0.065   132.56
2026.45    0.065   132.46
2026.55    0.064   132.36
2026.65    0.063   132.26
2026.75    0.062   132.16
2026.85    0.061   132.05
2026.95    0.060   131.94
2027.05    0.058   131.82
2027.15    0.057   131.70
2027.25    0.055   131.56
2027.35    0.053   131.42
2027.45    0.051   131.27
2027.55    0.050   131.11
2027.65    0.047   130.94
2027.75    0.045   130.74
2027.85    0.043   130.53
2027.95    0.041   130.30
2028.05    0.039   130.04
2028.15    0.036   129.74
2028.25    0.034   129.40
2028.35    0.031   129.01
2028.45    0.029   128.55
2028.55    0.026   128.00
2028.65    0.024   127.33
2028.75    0.021   126.51
2028.85    0.018   125.45
2028.95    0.016   124.04
2029.05    0.013   122.07
2029.15    0.011   119.15
2029.25    0.008   114.34
2029.35    0.006   105.17
2029.45    0.003    83.46
2029.55    0.003    33.53
2029.65    0.004   353.58
2029.75    0.006   337.93
2029.85    0.009   330.76
2029.95    0.012   326.77
2030.05    0.014   324.25
2030.15    0.017   322.51
2030.25    0.019   321.25
2030.35    0.022   320.28
2030.45    0.025   319.51

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 16:18:11