Double Star Calculator - Orbit

Orbital Elements for HDS940BC

WDS:	HDS940BC	WDS ID/Discoverer
P:	12.200	Orbital period (years)
a:	0.0827	Semi-major axis (arcseconds)
i:	32.3	Inclination (degrees)
Ω:	54.7	Longitude of ascending node (degrees)
T:	2011.700	Epoch of periastron passage (year)
e:	0.095	Eccentricity
ω:	171.8	Longitude of periastron (degrees)
Start-Year:	2018.9	Year
End-Year:	2031.1	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS940BC
Position:	064640.72+082147.3	Epoch-2000 right ascension and declination
WDS-ID:	06467+0822	WDS designation
Discoverer Code:	HDS940BC	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	49015	HD catalog number
Hipparcos number:	32475	Hipparcos catalog number
V1:	11.7	Magnitude of the primary
V2:	12.0	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Tok2023c	Reference

Double Star Orbit for HDS940BC

WDS 6th Orbit including measures of HDS940BC

-- 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 HDS940BC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.069   312.16
--------------------------
2018.90    0.088    70.89
2019.00    0.088    73.09
2019.10    0.087    75.32
2019.20    0.086    77.58
2019.30    0.086    79.88
2019.40    0.085    82.21
2019.50    0.084    84.59
2019.60    0.083    87.02
2019.70    0.082    89.50
2019.80    0.081    92.03
2019.90    0.081    94.62
2020.00    0.080    97.26
2020.10    0.079    99.97
2020.20    0.078   102.75
2020.30    0.077   105.59
2020.40    0.076   108.51
2020.50    0.075   111.49
2020.60    0.074   114.55
2020.70    0.073   117.68
2020.80    0.072   120.88
2020.90    0.072   124.16
2021.00    0.071   127.50
2021.10    0.070   130.91
2021.20    0.070   134.38
2021.30    0.069   137.91
2021.40    0.069   141.49
2021.50    0.068   145.11
2021.60    0.068   148.76
2021.70    0.068   152.44
2021.80    0.068   156.14
2021.90    0.068   159.85
2022.00    0.068   163.56
2022.10    0.068   167.27
2022.20    0.068   170.95
2022.30    0.068   174.61
2022.40    0.069   178.24
2022.50    0.069   181.84
2022.60    0.069   185.40
2022.70    0.070   188.91
2022.80    0.070   192.38
2022.90    0.071   195.80
2023.00    0.071   199.17
2023.10    0.072   202.50
2023.20    0.072   205.78
2023.30    0.073   209.02
2023.40    0.073   212.22
2023.50    0.073   215.39
2023.60    0.074   218.52
2023.70    0.074   221.62
2023.80    0.074   224.70
2023.90    0.075   227.76
2024.00    0.075   230.80
2024.10    0.075   233.83
2024.20    0.075   236.85
2024.30    0.075   239.88
2024.40    0.075   242.91
2024.50    0.075   245.94
2024.60    0.075   248.99
2024.70    0.074   252.05
2024.80    0.074   255.14
2024.90    0.074   258.25
2025.00    0.073   261.38
2025.10    0.073   264.55
2025.20    0.073   267.75
2025.30    0.072   270.98
2025.40    0.072   274.25
2025.50    0.071   277.56
2025.60    0.071   280.90
2025.70    0.071   284.28
2025.80    0.070   287.69
2025.90    0.070   291.13
2026.00    0.070   294.59
2026.10    0.070   298.08
2026.20    0.070   301.59
2026.30    0.069   305.11
2026.40    0.069   308.63
2026.50    0.069   312.16
2026.60    0.070   315.67
2026.70    0.070   319.17
2026.80    0.070   322.64
2026.90    0.070   326.09
2027.00    0.071   329.50
2027.10    0.071   332.87
2027.20    0.072   336.19
2027.30    0.072   339.46
2027.40    0.073   342.68
2027.50    0.074   345.83
2027.60    0.074   348.93
2027.70    0.075   351.96
2027.80    0.076   354.93
2027.90    0.077   357.84
2028.00    0.078     0.69
2028.10    0.079     3.47
2028.20    0.079     6.19
2028.30    0.080     8.86
2028.40    0.081    11.47
2028.50    0.082    14.02
2028.60    0.083    16.52
2028.70    0.084    18.98
2028.80    0.084    21.38
2028.90    0.085    23.75
2029.00    0.086    26.07
2029.10    0.087    28.36
2029.20    0.087    30.61
2029.30    0.088    32.83
2029.40    0.088    35.02
2029.50    0.089    37.19
2029.60    0.089    39.33
2029.70    0.090    41.46
2029.80    0.090    43.57
2029.90    0.090    45.67
2030.00    0.090    47.76
2030.10    0.090    49.84
2030.20    0.090    51.91
2030.30    0.090    53.98
2030.40    0.090    56.06
2030.50    0.090    58.14
2030.60    0.090    60.23
2030.70    0.090    62.33
2030.80    0.089    64.44
2030.90    0.089    66.57
2031.00    0.089    68.72

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 15:50:42