Double Star Calculator - Orbit

Orbital Elements for STF1821A
WDS: STF1821A WDS ID/Discoverer
P: 20.000 Orbital period (years)
a: 0.0351 Semi-major axis (arcseconds)
i: 56.0 Inclination (degrees)
Ω: 186.0 Longitude of ascending node (degrees)
T: 1994.900 Epoch of periastron passage (year)
e: 0.5 Eccentricity
ω: 15.0 Longitude of periastron (degrees)
Start-Year: 2015.0 Year
End-Year: 2035.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1821A
Position: 141329.00+514723.8 Epoch-2000 right ascension and declination
WDS-ID: 14135+5147 WDS designation
Discoverer Code: STF1821A Discover designation and components
ADS number: 9173 Aitken Double Star catalog
HD number: 124675 HD catalog number
Hipparcos number: 69483 Hipparcos catalog number
V1: 4.53 Magnitude of the primary
V2: . Magnitude of the secondary
Equinox: Equinox
Date: 2012 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: Kiy2017b Reference

Double Star Orbit for STF1821A



WDS 6th Orbit including measures of STF1821A

-- 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 STF1821A
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.048    21.40
--------------------------
2015.00    0.017   198.25
2015.10    0.016   202.17
2015.20    0.016   206.30
2015.30    0.015   210.70
2015.40    0.015   215.40
2015.50    0.014   220.43
2015.60    0.014   225.83
2015.70    0.013   231.60
2015.80    0.013   237.73
2015.90    0.013   244.17
2016.00    0.013   250.84
2016.10    0.013   257.64
2016.20    0.013   264.44
2016.30    0.013   271.10
2016.40    0.013   277.50
2016.50    0.014   283.55
2016.60    0.014   289.19
2016.70    0.015   294.40
2016.80    0.015   299.16
2016.90    0.016   303.50
2017.00    0.017   307.45
2017.10    0.018   311.04
2017.20    0.019   314.30
2017.30    0.019   317.27
2017.40    0.020   319.98
2017.50    0.021   322.46
2017.60    0.022   324.74
2017.70    0.023   326.84
2017.80    0.024   328.79
2017.90    0.025   330.59
2018.00    0.026   332.27
2018.10    0.027   333.83
2018.20    0.028   335.30
2018.30    0.028   336.67
2018.40    0.029   337.97
2018.50    0.030   339.19
2018.60    0.031   340.35
2018.70    0.032   341.45
2018.80    0.032   342.50
2018.90    0.033   343.49
2019.00    0.034   344.44
2019.10    0.035   345.35
2019.20    0.035   346.22
2019.30    0.036   347.06
2019.40    0.037   347.87
2019.50    0.038   348.64
2019.60    0.038   349.39
2019.70    0.039   350.12
2019.80    0.039   350.82
2019.90    0.040   351.50
2020.00    0.041   352.16
2020.10    0.041   352.80
2020.20    0.042   353.42
2020.30    0.042   354.03
2020.40    0.043   354.62
2020.50    0.043   355.20
2020.60    0.044   355.76
2020.70    0.044   356.31
2020.80    0.045   356.85
2020.90    0.045   357.38
2021.00    0.046   357.90
2021.10    0.046   358.41
2021.20    0.047   358.91
2021.30    0.047   359.40
2021.40    0.047   359.89
2021.50    0.048     0.37
2021.60    0.048     0.83
2021.70    0.048     1.30
2021.80    0.049     1.76
2021.90    0.049     2.21
2022.00    0.049     2.65
2022.10    0.049     3.09
2022.20    0.050     3.53
2022.30    0.050     3.96
2022.40    0.050     4.39
2022.50    0.050     4.82
2022.60    0.051     5.24
2022.70    0.051     5.66
2022.80    0.051     6.07
2022.90    0.051     6.48
2023.00    0.051     6.89
2023.10    0.051     7.30
2023.20    0.051     7.71
2023.30    0.052     8.11
2023.40    0.052     8.52
2023.50    0.052     8.92
2023.60    0.052     9.32
2023.70    0.052     9.72
2023.80    0.052    10.12
2023.90    0.052    10.52
2024.00    0.052    10.91
2024.10    0.052    11.31
2024.20    0.052    11.71
2024.30    0.052    12.11
2024.40    0.052    12.51
2024.50    0.052    12.91
2024.60    0.052    13.31
2024.70    0.052    13.71
2024.80    0.052    14.12
2024.90    0.051    14.52
2025.00    0.051    14.93
2025.10    0.051    15.34
2025.20    0.051    15.75
2025.30    0.051    16.16
2025.40    0.051    16.58
2025.50    0.051    17.00
2025.60    0.050    17.42
2025.70    0.050    17.85
2025.80    0.050    18.27
2025.90    0.050    18.71
2026.00    0.049    19.14
2026.10    0.049    19.59
2026.20    0.049    20.03
2026.30    0.049    20.48
2026.40    0.048    20.94
2026.50    0.048    21.40
2026.60    0.048    21.87
2026.70    0.047    22.34
2026.80    0.047    22.82
2026.90    0.047    23.31
2027.00    0.046    23.81
2027.10    0.046    24.31
2027.20    0.046    24.82
2027.30    0.045    25.34
2027.40    0.045    25.87
2027.50    0.044    26.41
2027.60    0.044    26.96
2027.70    0.044    27.52
2027.80    0.043    28.09
2027.90    0.043    28.67
2028.00    0.042    29.27
2028.10    0.042    29.88
2028.20    0.041    30.50
2028.30    0.041    31.14
2028.40    0.040    31.80
2028.50    0.040    32.47
2028.60    0.039    33.16
2028.70    0.039    33.87
2028.80    0.038    34.60
2028.90    0.038    35.35
2029.00    0.037    36.13
2029.10    0.036    36.93
2029.20    0.036    37.75
2029.30    0.035    38.61
2029.40    0.035    39.49
2029.50    0.034    40.40
2029.60    0.033    41.35
2029.70    0.033    42.34
2029.80    0.032    43.36
2029.90    0.031    44.43
2030.00    0.031    45.54
2030.10    0.030    46.70
2030.20    0.029    47.90
2030.30    0.029    49.17
2030.40    0.028    50.49
2030.50    0.027    51.88
2030.60    0.027    53.34
2030.70    0.026    54.87
2030.80    0.025    56.49
2030.90    0.025    58.19
2031.00    0.024    59.98
2031.10    0.023    61.87
2031.20    0.023    63.87
2031.30    0.022    65.99
2031.40    0.022    68.23
2031.50    0.021    70.60
2031.60    0.020    73.12
2031.70    0.020    75.78
2031.80    0.019    78.59
2031.90    0.019    81.57
2032.00    0.018    84.72
2032.10    0.018    88.03
2032.20    0.017    91.51
2032.30    0.017    95.15
2032.40    0.017    98.95
2032.50    0.016   102.88
2032.60    0.016   106.95
2032.70    0.016   111.12
2032.80    0.016   115.36
2032.90    0.016   119.66
2033.00    0.016   123.98
2033.10    0.016   128.29
2033.20    0.016   132.57
2033.30    0.016   136.79
2033.40    0.016   140.94
2033.50    0.016   144.99
2033.60    0.017   148.95
2033.70    0.017   152.80
2033.80    0.017   156.54
2033.90    0.017   160.19
2034.00    0.017   163.75
2034.10    0.018   167.23
2034.20    0.018   170.64
2034.30    0.018   174.01
2034.40    0.018   177.35
2034.50    0.018   180.69
2034.60    0.018   184.05
2034.70    0.018   187.45
2034.80    0.017   190.93
2034.90    0.017   194.52






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 17:03:35



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