Double Star Calculator - Orbit

Orbital Elements for BD-042421
WDS: BD-042421 WDS ID/Discoverer
P: 18.991 Orbital period (years)
a: 0.064 Semi-major axis (arcseconds)
i: 171.1 Inclination (degrees)
Ω: 248.7 Longitude of ascending node (degrees)
T: 2005.167 Epoch of periastron passage (year)
e: 0.532 Eccentricity
ω: 325.3 Longitude of periastron (degrees)
Start-Year: 2015.504519982699 Year
End-Year: 2034.495480017301 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BD-042421
Position: 084118.53-044831.9 Epoch-2000 right ascension and declination
WDS-ID: 08413-0449 WDS designation
Discoverer Code: BD-042421 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 74014 HD catalog number
Hipparcos number: 42634 Hipparcos catalog number
V1: 7.57 Magnitude of the primary
V2: . Magnitude of the secondary
Equinox: Equinox
Date: Date of last observation
Orbit grade: 9 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: SaJ2011 Reference

Double Star Orbit for BD-042421



WDS 6th Orbit including measures of BD-042421

-- 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 BD-042421
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.054   176.48
--------------------------
2015.50    0.097    97.33
2015.60    0.097    96.64
2015.70    0.097    95.95
2015.80    0.097    95.26
2015.90    0.097    94.56
2016.00    0.096    93.87
2016.10    0.096    93.17
2016.20    0.096    92.46
2016.30    0.096    91.75
2016.40    0.095    91.04
2016.50    0.095    90.33
2016.60    0.095    89.61
2016.70    0.095    88.89
2016.80    0.094    88.16
2016.90    0.094    87.42
2017.00    0.094    86.68
2017.10    0.093    85.94
2017.20    0.093    85.19
2017.30    0.092    84.43
2017.40    0.092    83.67
2017.50    0.091    82.89
2017.60    0.091    82.11
2017.70    0.091    81.32
2017.80    0.090    80.53
2017.90    0.090    79.72
2018.00    0.089    78.91
2018.10    0.088    78.08
2018.20    0.088    77.25
2018.30    0.087    76.40
2018.40    0.087    75.54
2018.50    0.086    74.67
2018.60    0.085    73.79
2018.70    0.085    72.89
2018.80    0.084    71.98
2018.90    0.083    71.05
2019.00    0.083    70.11
2019.10    0.082    69.15
2019.20    0.081    68.17
2019.30    0.080    67.18
2019.40    0.080    66.16
2019.50    0.079    65.12
2019.60    0.078    64.06
2019.70    0.077    62.98
2019.80    0.076    61.88
2019.90    0.075    60.74
2020.00    0.074    59.58
2020.10    0.073    58.39
2020.20    0.072    57.17
2020.30    0.071    55.92
2020.40    0.070    54.63
2020.50    0.069    53.31
2020.60    0.068    51.94
2020.70    0.067    50.53
2020.80    0.066    49.07
2020.90    0.065    47.57
2021.00    0.064    46.01
2021.10    0.063    44.40
2021.20    0.062    42.73
2021.30    0.061    40.99
2021.40    0.059    39.18
2021.50    0.058    37.30
2021.60    0.057    35.33
2021.70    0.056    33.28
2021.80    0.054    31.13
2021.90    0.053    28.87
2022.00    0.052    26.50
2022.10    0.050    24.01
2022.20    0.049    21.38
2022.30    0.048    18.61
2022.40    0.046    15.67
2022.50    0.045    12.56
2022.60    0.044     9.25
2022.70    0.042     5.74
2022.80    0.041     2.00
2022.90    0.040   358.01
2023.00    0.038   353.76
2023.10    0.037   349.21
2023.20    0.036   344.36
2023.30    0.035   339.19
2023.40    0.034   333.69
2023.50    0.033   327.86
2023.60    0.032   321.69
2023.70    0.031   315.21
2023.80    0.031   308.45
2023.90    0.030   301.45
2024.00    0.030   294.28
2024.10    0.030   287.01
2024.20    0.030   279.71
2024.30    0.030   272.48
2024.40    0.030   265.37
2024.50    0.031   258.47
2024.60    0.032   251.81
2024.70    0.032   245.44
2024.80    0.033   239.39
2024.90    0.034   233.66
2025.00    0.035   228.25
2025.10    0.036   223.16
2025.20    0.037   218.38
2025.30    0.039   213.88
2025.40    0.040   209.66
2025.50    0.041   205.69
2025.60    0.042   201.96
2025.70    0.044   198.45
2025.80    0.045   195.14
2025.90    0.046   192.01
2026.00    0.048   189.06
2026.10    0.049   186.26
2026.20    0.050   183.60
2026.30    0.051   181.08
2026.40    0.053   178.67
2026.50    0.054   176.38
2026.60    0.055   174.19
2026.70    0.056   172.10
2026.80    0.058   170.09
2026.90    0.059   168.17
2027.00    0.060   166.33
2027.10    0.061   164.55
2027.20    0.062   162.84
2027.30    0.063   161.19
2027.40    0.064   159.59
2027.50    0.065   158.05
2027.60    0.067   156.56
2027.70    0.068   155.12
2027.80    0.069   153.72
2027.90    0.070   152.36
2028.00    0.071   151.04
2028.10    0.072   149.75
2028.20    0.073   148.50
2028.30    0.073   147.28
2028.40    0.074   146.09
2028.50    0.075   144.93
2028.60    0.076   143.80
2028.70    0.077   142.69
2028.80    0.078   141.61
2028.90    0.079   140.55
2029.00    0.079   139.51
2029.10    0.080   138.49
2029.20    0.081   137.49
2029.30    0.082   136.51
2029.40    0.082   135.54
2029.50    0.083   134.60
2029.60    0.084   133.67
2029.70    0.085   132.75
2029.80    0.085   131.85
2029.90    0.086   130.96
2030.00    0.086   130.08
2030.10    0.087   129.22
2030.20    0.088   128.37
2030.30    0.088   127.53
2030.40    0.089   126.70
2030.50    0.089   125.88
2030.60    0.090   125.07
2030.70    0.090   124.27
2030.80    0.091   123.48
2030.90    0.091   122.69
2031.00    0.092   121.92
2031.10    0.092   121.15
2031.20    0.093   120.38
2031.30    0.093   119.63
2031.40    0.093   118.88
2031.50    0.094   118.14
2031.60    0.094   117.40
2031.70    0.094   116.67
2031.80    0.095   115.94
2031.90    0.095   115.22
2032.00    0.095   114.50
2032.10    0.096   113.79
2032.20    0.096   113.08
2032.30    0.096   112.37
2032.40    0.096   111.67
2032.50    0.096   110.97
2032.60    0.097   110.27
2032.70    0.097   109.58
2032.80    0.097   108.89
2032.90    0.097   108.20
2033.00    0.097   107.51
2033.10    0.097   106.83
2033.20    0.097   106.14
2033.30    0.098   105.46
2033.40    0.098   104.78
2033.50    0.098   104.09
2033.60    0.098   103.41
2033.70    0.098   102.73
2033.80    0.098   102.05
2033.90    0.098   101.37
2034.00    0.098   100.69
2034.10    0.098   100.01
2034.20    0.097    99.32
2034.30    0.097    98.64
2034.40    0.097    97.95






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 16:09:36



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