Double Star Calculator - Orbit

Orbital Elements for A2801

WDS:	A2801	WDS ID/Discoverer
P:	20.633	Orbital period (years)
a:	0.16432	Semi-major axis (arcseconds)
i:	67.8	Inclination (degrees)
Ω:	154.1	Longitude of ascending node (degrees)
T:	1931.498	Epoch of periastron passage (year)
e:	0.8349	Eccentricity
ω:	67.88	Longitude of periastron (degrees)
Start-Year:	2014.68365	Year
End-Year:	2035.31635	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2801
Position:	041044.48-045228.2	Epoch-2000 right ascension and declination
WDS-ID:	04107-0452	WDS designation
Discoverer Code:	A2801	Discover designation and components
ADS number:	3041	Aitken Double Star catalog
HD number:	26441	HD catalog number
Hipparcos number:	19508	Hipparcos catalog number
V1:	8.3	Magnitude of the primary
V2:	8.3	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:	n	Flags
Ephemerides:		Ephemerides
Code:	JAA2022	Reference

Double Star Orbit for A2801

WDS 6th Orbit including measures of A2801

-- 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 A2801

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.133    27.18
--------------------------
2014.68    0.068   332.92
2014.78    0.075   334.82
2014.88    0.082   336.40
2014.98    0.088   337.77
2015.08    0.093   338.97
2015.18    0.098   340.04
2015.28    0.103   341.01
2015.38    0.107   341.90
2015.48    0.111   342.72
2015.58    0.115   343.49
2015.68    0.119   344.20
2015.78    0.122   344.88
2015.88    0.125   345.52
2015.98    0.128   346.13
2016.08    0.131   346.72
2016.18    0.134   347.28
2016.28    0.136   347.82
2016.38    0.139   348.34
2016.48    0.141   348.84
2016.58    0.143   349.33
2016.68    0.145   349.80
2016.78    0.147   350.26
2016.88    0.149   350.71
2016.98    0.151   351.14
2017.08    0.152   351.57
2017.18    0.154   351.99
2017.28    0.155   352.40
2017.38    0.157   352.80
2017.48    0.158   353.20
2017.58    0.159   353.59
2017.68    0.161   353.97
2017.78    0.162   354.35
2017.88    0.163   354.72
2017.98    0.164   355.09
2018.08    0.165   355.45
2018.18    0.166   355.81
2018.28    0.167   356.16
2018.38    0.167   356.51
2018.48    0.168   356.86
2018.58    0.169   357.21
2018.68    0.169   357.55
2018.78    0.170   357.89
2018.88    0.171   358.23
2018.98    0.171   358.56
2019.08    0.172   358.90
2019.18    0.172   359.23
2019.28    0.172   359.56
2019.38    0.173   359.89
2019.48    0.173     0.21
2019.58    0.173     0.54
2019.68    0.174     0.87
2019.78    0.174     1.19
2019.88    0.174     1.51
2019.98    0.174     1.84
2020.08    0.174     2.16
2020.18    0.174     2.48
2020.28    0.174     2.81
2020.38    0.174     3.13
2020.48    0.174     3.45
2020.58    0.174     3.77
2020.68    0.174     4.09
2020.78    0.174     4.42
2020.88    0.174     4.74
2020.98    0.174     5.07
2021.08    0.174     5.39
2021.18    0.173     5.72
2021.28    0.173     6.04
2021.38    0.173     6.37
2021.48    0.173     6.70
2021.58    0.172     7.03
2021.68    0.172     7.36
2021.78    0.172     7.69
2021.88    0.171     8.02
2021.98    0.171     8.36
2022.08    0.170     8.70
2022.18    0.170     9.04
2022.28    0.169     9.38
2022.38    0.169     9.72
2022.48    0.168    10.06
2022.58    0.168    10.41
2022.68    0.167    10.76
2022.78    0.167    11.11
2022.88    0.166    11.47
2022.98    0.165    11.82
2023.08    0.165    12.18
2023.18    0.164    12.55
2023.28    0.163    12.91
2023.38    0.163    13.28
2023.48    0.162    13.65
2023.58    0.161    14.03
2023.68    0.160    14.41
2023.78    0.160    14.79
2023.88    0.159    15.17
2023.98    0.158    15.56
2024.08    0.157    15.96
2024.18    0.156    16.36
2024.28    0.156    16.76
2024.38    0.155    17.17
2024.48    0.154    17.58
2024.58    0.153    18.00
2024.68    0.152    18.42
2024.78    0.151    18.84
2024.88    0.150    19.28
2024.98    0.149    19.71
2025.08    0.148    20.16
2025.18    0.147    20.61
2025.28    0.146    21.06
2025.38    0.145    21.52
2025.48    0.144    21.99
2025.58    0.143    22.47
2025.68    0.142    22.95
2025.78    0.141    23.44
2025.88    0.140    23.94
2025.98    0.139    24.44
2026.08    0.138    24.95
2026.18    0.137    25.47
2026.28    0.136    26.00
2026.38    0.134    26.54
2026.48    0.133    27.09
2026.58    0.132    27.64
2026.68    0.131    28.21
2026.78    0.130    28.79
2026.88    0.129    29.37
2026.98    0.127    29.97
2027.08    0.126    30.58
2027.18    0.125    31.20
2027.28    0.124    31.83
2027.38    0.123    32.48
2027.48    0.121    33.14
2027.58    0.120    33.81
2027.68    0.119    34.49
2027.78    0.118    35.19
2027.88    0.116    35.91
2027.98    0.115    36.64
2028.08    0.114    37.38
2028.18    0.113    38.14
2028.28    0.112    38.92
2028.38    0.110    39.72
2028.48    0.109    40.54
2028.58    0.108    41.37
2028.68    0.107    42.22
2028.78    0.105    43.10
2028.88    0.104    43.99
2028.98    0.103    44.91
2029.08    0.102    45.85
2029.18    0.100    46.81
2029.28    0.099    47.80
2029.38    0.098    48.81
2029.48    0.097    49.85
2029.58    0.095    50.91
2029.68    0.094    52.00
2029.78    0.093    53.12
2029.88    0.092    54.27
2029.98    0.091    55.45
2030.08    0.089    56.66
2030.18    0.088    57.91
2030.28    0.087    59.18
2030.38    0.086    60.49
2030.48    0.085    61.84
2030.58    0.084    63.22
2030.68    0.083    64.63
2030.78    0.082    66.09
2030.88    0.081    67.58
2030.98    0.079    69.11
2031.08    0.078    70.68
2031.18    0.078    72.29
2031.28    0.077    73.94
2031.38    0.076    75.63
2031.48    0.075    77.37
2031.58    0.074    79.14
2031.68    0.073    80.96
2031.78    0.072    82.81
2031.88    0.071    84.71
2031.98    0.071    86.65
2032.08    0.070    88.64
2032.18    0.069    90.66
2032.28    0.069    92.72
2032.38    0.068    94.82
2032.48    0.067    96.97
2032.58    0.067    99.15
2032.68    0.066   101.37
2032.78    0.066   103.63
2032.88    0.065   105.93
2032.98    0.064   108.27
2033.08    0.064   110.66
2033.18    0.063   113.08
2033.28    0.063   115.56
2033.38    0.062   118.09
2033.48    0.061   120.68
2033.58    0.060   123.34
2033.68    0.059   126.09
2033.78    0.058   128.94
2033.88    0.057   131.93
2033.98    0.055   135.09
2034.08    0.052   138.50
2034.18    0.049   142.28
2034.28    0.045   146.62
2034.38    0.040   151.96
2034.48    0.033   159.37
2034.58    0.023   172.49
2034.68    0.012   210.02
2034.78    0.014   284.37
2034.88    0.026   310.99
2034.98    0.038   320.80
2035.08    0.048   326.12
2035.18    0.058   329.62
2035.28    0.066   332.20

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 15:18:33