Double Star Calculator - Orbit

Orbital Elements for HDS441

WDS:	HDS441	WDS ID/Discoverer
P:	18.964	Orbital period (years)
a:	0.2181	Semi-major axis (arcseconds)
i:	102.7	Inclination (degrees)
Ω:	17.8	Longitude of ascending node (degrees)
T:	2007.281	Epoch of periastron passage (year)
e:	0.5	Eccentricity
ω:	84.4	Longitude of periastron (degrees)
Start-Year:	2015.518	Year
End-Year:	2034.482	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS441
Position:	033040.06-192608.0	Epoch-2000 right ascension and declination
WDS-ID:	03307-1926	WDS designation
Discoverer Code:	HDS441	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	21841	HD catalog number
Hipparcos number:	16348	Hipparcos catalog number
V1:	8.22	Magnitude of the primary
V2:	8.47	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	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:	Cve2016b	Reference

Double Star Orbit for HDS441

WDS 6th Orbit including measures of HDS441

-- 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 HDS441

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.032   246.29
--------------------------
2015.52    0.107   157.99
2015.62    0.104   156.45
2015.72    0.102   154.83
2015.82    0.099   153.13
2015.92    0.097   151.33
2016.02    0.094   149.44
2016.12    0.092   147.44
2016.22    0.089   145.34
2016.32    0.087   143.12
2016.42    0.085   140.79
2016.52    0.083   138.34
2016.62    0.081   135.77
2016.72    0.079   133.08
2016.82    0.078   130.28
2016.92    0.076   127.36
2017.02    0.075   124.34
2017.12    0.074   121.23
2017.22    0.073   118.03
2017.32    0.072   114.76
2017.42    0.072   111.45
2017.52    0.072   108.10
2017.62    0.072   104.75
2017.72    0.072   101.40
2017.82    0.072    98.09
2017.92    0.073    94.82
2018.02    0.074    91.62
2018.12    0.075    88.51
2018.22    0.076    85.49
2018.32    0.078    82.57
2018.42    0.079    79.77
2018.52    0.081    77.08
2018.62    0.083    74.51
2018.72    0.085    72.06
2018.82    0.087    69.73
2018.92    0.089    67.51
2019.02    0.092    65.40
2019.12    0.094    63.40
2019.22    0.096    61.50
2019.32    0.099    59.70
2019.42    0.102    57.99
2019.52    0.104    56.37
2019.62    0.107    54.83
2019.72    0.110    53.36
2019.82    0.112    51.97
2019.92    0.115    50.64
2020.02    0.118    49.38
2020.12    0.121    48.17
2020.22    0.124    47.02
2020.32    0.126    45.92
2020.42    0.129    44.87
2020.52    0.132    43.86
2020.62    0.135    42.89
2020.72    0.137    41.96
2020.82    0.140    41.07
2020.92    0.143    40.20
2021.02    0.145    39.37
2021.12    0.148    38.57
2021.22    0.150    37.80
2021.32    0.153    37.05
2021.42    0.155    36.32
2021.52    0.157    35.61
2021.62    0.159    34.93
2021.72    0.162    34.26
2021.82    0.164    33.61
2021.92    0.166    32.98
2022.02    0.168    32.36
2022.12    0.169    31.75
2022.22    0.171    31.16
2022.32    0.173    30.58
2022.42    0.174    30.00
2022.52    0.175    29.44
2022.62    0.176    28.88
2022.72    0.177    28.34
2022.82    0.178    27.79
2022.92    0.179    27.25
2023.02    0.180    26.72
2023.12    0.180    26.19
2023.22    0.180    25.66
2023.32    0.180    25.13
2023.42    0.180    24.59
2023.52    0.179    24.06
2023.62    0.179    23.52
2023.72    0.178    22.98
2023.82    0.176    22.43
2023.92    0.175    21.87
2024.02    0.173    21.30
2024.12    0.171    20.72
2024.22    0.168    20.12
2024.32    0.165    19.50
2024.42    0.162    18.86
2024.52    0.158    18.19
2024.62    0.154    17.48
2024.72    0.150    16.74
2024.82    0.144    15.94
2024.92    0.139    15.09
2025.02    0.133    14.16
2025.12    0.126    13.13
2025.22    0.119    11.99
2025.32    0.111    10.69
2025.42    0.103     9.19
2025.52    0.094     7.42
2025.62    0.085     5.28
2025.72    0.075     2.59
2025.82    0.065   359.08
2025.92    0.055   354.26
2026.02    0.045   347.23
2026.12    0.035   336.25
2026.22    0.028   318.29
2026.32    0.024   291.45
2026.42    0.026   263.28
2026.52    0.033   243.37
2026.62    0.043   231.18
2026.72    0.053   223.50
2026.82    0.063   218.32
2026.92    0.073   214.59
2027.02    0.083   211.78
2027.12    0.093   209.55
2027.22    0.102   207.74
2027.32    0.111   206.22
2027.42    0.119   204.92
2027.52    0.127   203.78
2027.62    0.134   202.77
2027.72    0.141   201.87
2027.82    0.147   201.04
2027.92    0.153   200.28
2028.02    0.159   199.57
2028.12    0.164   198.91
2028.22    0.168   198.29
2028.32    0.173   197.70
2028.42    0.177   197.13
2028.52    0.180   196.59
2028.62    0.183   196.07
2028.72    0.186   195.57
2028.82    0.189   195.08
2028.92    0.191   194.61
2029.02    0.193   194.14
2029.12    0.195   193.69
2029.22    0.197   193.24
2029.32    0.198   192.80
2029.42    0.199   192.36
2029.52    0.200   191.93
2029.62    0.201   191.50
2029.72    0.201   191.07
2029.82    0.201   190.65
2029.92    0.202   190.23
2030.02    0.201   189.80
2030.12    0.201   189.38
2030.22    0.201   188.95
2030.32    0.200   188.53
2030.42    0.200   188.10
2030.52    0.199   187.66
2030.62    0.198   187.23
2030.72    0.197   186.79
2030.82    0.196   186.34
2030.92    0.194   185.89
2031.02    0.193   185.43
2031.12    0.192   184.97
2031.22    0.190   184.49
2031.32    0.188   184.01
2031.42    0.187   183.52
2031.52    0.185   183.02
2031.62    0.183   182.51
2031.72    0.181   181.99
2031.82    0.179   181.46
2031.92    0.176   180.92
2032.02    0.174   180.36
2032.12    0.172   179.78
2032.22    0.170   179.19
2032.32    0.167   178.58
2032.42    0.165   177.96
2032.52    0.162   177.32
2032.62    0.160   176.65
2032.72    0.157   175.96
2032.82    0.154   175.25
2032.92    0.152   174.52
2033.02    0.149   173.76
2033.12    0.146   172.96
2033.22    0.143   172.14
2033.32    0.140   171.29
2033.42    0.138   170.40
2033.52    0.135   169.47
2033.62    0.132   168.50
2033.72    0.129   167.49
2033.82    0.126   166.44
2033.92    0.123   165.33
2034.02    0.120   164.17
2034.12    0.117   162.95
2034.22    0.115   161.68
2034.32    0.112   160.34
2034.42    0.109   158.93

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 15:11:55