Double Star Calculator - Orbit

Orbital Elements for HDS444

WDS:	HDS444	WDS ID/Discoverer
P:	20.410	Orbital period (years)
a:	0.0783	Semi-major axis (arcseconds)
i:	37.1	Inclination (degrees)
Ω:	49.6	Longitude of ascending node (degrees)
T:	2025.020	Epoch of periastron passage (year)
e:	0.581	Eccentricity
ω:	338.0	Longitude of periastron (degrees)
Start-Year:	2014.795	Year
End-Year:	2035.205	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS444
Position:	033103.99-002852.1	Epoch-2000 right ascension and declination
WDS-ID:	03311-0029	WDS designation
Discoverer Code:	HDS444	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	21822	HD catalog number
Hipparcos number:	16389	Hipparcos catalog number
V1:	7.06	Magnitude of the primary
V2:	7.99	Magnitude of the secondary
Equinox:		Equinox
Date:		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:	Msn2023	Reference

Double Star Orbit for HDS444

WDS 6th Orbit including measures of HDS444

-- 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 HDS444

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.042   109.93
--------------------------
2014.80    0.121   211.64
2014.89    0.121   212.12
2014.99    0.121   212.61
2015.09    0.121   213.09
2015.19    0.121   213.57
2015.29    0.121   214.04
2015.39    0.121   214.52
2015.49    0.121   215.00
2015.59    0.121   215.48
2015.69    0.121   215.96
2015.79    0.121   216.43
2015.89    0.121   216.91
2015.99    0.121   217.39
2016.09    0.121   217.87
2016.19    0.121   218.35
2016.29    0.121   218.83
2016.39    0.121   219.31
2016.49    0.120   219.80
2016.59    0.120   220.28
2016.69    0.120   220.77
2016.79    0.120   221.26
2016.89    0.119   221.75
2016.99    0.119   222.24
2017.09    0.119   222.74
2017.19    0.118   223.24
2017.29    0.118   223.74
2017.39    0.118   224.25
2017.49    0.117   224.76
2017.59    0.117   225.27
2017.69    0.116   225.78
2017.79    0.116   226.30
2017.89    0.115   226.83
2017.99    0.115   227.36
2018.09    0.114   227.89
2018.19    0.114   228.43
2018.29    0.113   228.98
2018.39    0.113   229.53
2018.49    0.112   230.09
2018.59    0.111   230.65
2018.69    0.110   231.22
2018.79    0.110   231.80
2018.89    0.109   232.39
2018.99    0.108   232.98
2019.09    0.107   233.59
2019.19    0.107   234.20
2019.29    0.106   234.82
2019.39    0.105   235.46
2019.49    0.104   236.10
2019.59    0.103   236.76
2019.69    0.102   237.43
2019.79    0.101   238.11
2019.89    0.100   238.81
2019.99    0.099   239.52
2020.09    0.098   240.24
2020.19    0.097   240.99
2020.29    0.095   241.75
2020.39    0.094   242.53
2020.49    0.093   243.33
2020.59    0.092   244.15
2020.69    0.091   244.99
2020.79    0.089   245.86
2020.89    0.088   246.76
2020.99    0.086   247.68
2021.09    0.085   248.64
2021.19    0.084   249.62
2021.29    0.082   250.65
2021.39    0.081   251.71
2021.49    0.079   252.81
2021.59    0.078   253.95
2021.69    0.076   255.15
2021.79    0.074   256.39
2021.89    0.073   257.70
2021.99    0.071   259.06
2022.09    0.069   260.49
2022.19    0.067   262.00
2022.29    0.066   263.59
2022.39    0.064   265.28
2022.49    0.062   267.06
2022.59    0.060   268.96
2022.69    0.058   270.97
2022.79    0.056   273.13
2022.89    0.054   275.44
2022.99    0.052   277.93
2023.09    0.050   280.61
2023.19    0.048   283.51
2023.29    0.046   286.65
2023.39    0.044   290.07
2023.49    0.042   293.80
2023.59    0.041   297.86
2023.69    0.039   302.30
2023.79    0.037   307.16
2023.89    0.036   312.45
2023.99    0.034   318.19
2024.09    0.033   324.39
2024.19    0.032   331.03
2024.29    0.031   338.05
2024.39    0.031   345.38
2024.49    0.030   352.92
2024.59    0.030     0.54
2024.69    0.030     8.15
2024.79    0.031    15.65
2024.89    0.031    22.95
2024.99    0.032    30.01
2025.09    0.032    36.82
2025.19    0.033    43.37
2025.29    0.034    49.66
2025.39    0.034    55.72
2025.49    0.035    61.56
2025.59    0.036    67.20
2025.69    0.036    72.64
2025.79    0.037    77.90
2025.89    0.038    82.98
2025.99    0.038    87.88
2026.09    0.039    92.60
2026.19    0.040    97.15
2026.29    0.040   101.52
2026.39    0.041   105.72
2026.49    0.042   109.74
2026.59    0.043   113.58
2026.69    0.044   117.25
2026.79    0.045   120.76
2026.89    0.046   124.10
2026.99    0.048   127.29
2027.09    0.049   130.32
2027.19    0.050   133.21
2027.29    0.051   135.97
2027.39    0.052   138.59
2027.49    0.054   141.09
2027.59    0.055   143.47
2027.69    0.056   145.74
2027.79    0.058   147.91
2027.89    0.059   149.98
2027.99    0.060   151.96
2028.09    0.062   153.86
2028.19    0.063   155.67
2028.29    0.064   157.41
2028.39    0.066   159.08
2028.49    0.067   160.68
2028.59    0.068   162.22
2028.69    0.070   163.70
2028.79    0.071   165.12
2028.89    0.072   166.50
2028.99    0.073   167.82
2029.09    0.075   169.10
2029.19    0.076   170.34
2029.29    0.077   171.54
2029.39    0.078   172.69
2029.49    0.080   173.82
2029.59    0.081   174.91
2029.69    0.082   175.96
2029.79    0.083   176.99
2029.89    0.084   177.99
2029.99    0.086   178.96
2030.09    0.087   179.90
2030.19    0.088   180.82
2030.29    0.089   181.72
2030.39    0.090   182.60
2030.49    0.091   183.45
2030.59    0.092   184.29
2030.69    0.093   185.10
2030.79    0.094   185.90
2030.89    0.095   186.68
2030.99    0.096   187.45
2031.09    0.097   188.20
2031.19    0.098   188.94
2031.29    0.099   189.66
2031.39    0.100   190.37
2031.49    0.101   191.06
2031.59    0.102   191.75
2031.69    0.103   192.42
2031.79    0.103   193.08
2031.89    0.104   193.73
2031.99    0.105   194.37
2032.09    0.106   195.00
2032.19    0.107   195.62
2032.29    0.107   196.24
2032.39    0.108   196.84
2032.49    0.109   197.44
2032.59    0.109   198.03
2032.69    0.110   198.61
2032.79    0.111   199.18
2032.89    0.111   199.75
2032.99    0.112   200.31
2033.09    0.113   200.87
2033.19    0.113   201.42
2033.29    0.114   201.97
2033.39    0.114   202.51
2033.49    0.115   203.04
2033.59    0.115   203.57
2033.69    0.116   204.10
2033.79    0.116   204.62
2033.89    0.117   205.14
2033.99    0.117   205.65
2034.09    0.117   206.16
2034.19    0.118   206.67
2034.29    0.118   207.17
2034.39    0.119   207.67
2034.49    0.119   208.17
2034.59    0.119   208.66
2034.69    0.119   209.16
2034.79    0.120   209.65
2034.89    0.120   210.14
2034.99    0.120   210.62
2035.09    0.120   211.11
2035.19    0.121   211.59

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 15:12:09