Double Star Calculator - Orbit

Orbital Elements for HDS2440

WDS:	HDS2440	WDS ID/Discoverer
P:	25.730	Orbital period (years)
a:	0.15369999999999998	Semi-major axis (arcseconds)
i:	120.5	Inclination (degrees)
Ω:	75.25	Longitude of ascending node (degrees)
T:	2002.460	Epoch of periastron passage (year)
e:	0.252	Eccentricity
ω:	109.3	Longitude of periastron (degrees)
Start-Year:	2012.135	Year
End-Year:	2037.865	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2440
Position:	171528.89+105136.0	Epoch-2000 right ascension and declination
WDS-ID:	17155+1052	WDS designation
Discoverer Code:	HDS2440	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	156146	HD catalog number
Hipparcos number:	84417	Hipparcos catalog number
V1:	9.24	Magnitude of the primary
V2:	10.04	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:	Mdz2021	Reference

Double Star Orbit for HDS2440

WDS 6th Orbit including measures of HDS2440

-- 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 HDS2440

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.071    21.34
--------------------------
2012.13    0.097   182.57
2012.23    0.097   180.84
2012.33    0.096   179.10
2012.43    0.096   177.35
2012.53    0.096   175.59
2012.63    0.096   173.82
2012.73    0.096   172.05
2012.83    0.096   170.28
2012.93    0.096   168.50
2013.03    0.096   166.73
2013.13    0.096   164.96
2013.23    0.096   163.20
2013.33    0.096   161.44
2013.43    0.097   159.70
2013.53    0.097   157.97
2013.63    0.097   156.25
2013.73    0.098   154.55
2013.83    0.099   152.87
2013.93    0.099   151.21
2014.03    0.100   149.57
2014.13    0.100   147.95
2014.23    0.101   146.35
2014.33    0.102   144.78
2014.43    0.103   143.24
2014.53    0.104   141.71
2014.63    0.105   140.22
2014.73    0.106   138.75
2014.83    0.107   137.31
2014.93    0.108   135.90
2015.03    0.109   134.51
2015.13    0.110   133.15
2015.23    0.111   131.82
2015.33    0.112   130.52
2015.43    0.113   129.24
2015.53    0.114   127.98
2015.63    0.116   126.76
2015.73    0.117   125.56
2015.83    0.118   124.38
2015.93    0.119   123.23
2016.03    0.121   122.10
2016.13    0.122   121.00
2016.23    0.123   119.92
2016.33    0.124   118.86
2016.43    0.126   117.82
2016.53    0.127   116.81
2016.63    0.128   115.81
2016.73    0.130   114.84
2016.83    0.131   113.88
2016.93    0.132   112.94
2017.03    0.133   112.02
2017.13    0.135   111.12
2017.23    0.136   110.23
2017.33    0.137   109.36
2017.43    0.138   108.51
2017.53    0.140   107.67
2017.63    0.141   106.84
2017.73    0.142   106.03
2017.83    0.143   105.23
2017.93    0.144   104.45
2018.03    0.145   103.68
2018.13    0.147   102.91
2018.23    0.148   102.16
2018.33    0.149   101.43
2018.43    0.150   100.70
2018.53    0.151    99.98
2018.63    0.152    99.27
2018.73    0.153    98.57
2018.83    0.154    97.87
2018.93    0.154    97.19
2019.03    0.155    96.51
2019.13    0.156    95.84
2019.23    0.157    95.18
2019.33    0.158    94.52
2019.43    0.158    93.87
2019.53    0.159    93.23
2019.63    0.160    92.59
2019.73    0.160    91.96
2019.83    0.161    91.33
2019.93    0.161    90.70
2020.03    0.162    90.08
2020.13    0.162    89.46
2020.23    0.163    88.84
2020.33    0.163    88.23
2020.43    0.163    87.62
2020.53    0.163    87.01
2020.63    0.164    86.40
2020.73    0.164    85.80
2020.83    0.164    85.19
2020.93    0.164    84.58
2021.03    0.164    83.98
2021.13    0.164    83.37
2021.23    0.163    82.77
2021.33    0.163    82.16
2021.43    0.163    81.55
2021.53    0.163    80.94
2021.63    0.162    80.32
2021.73    0.162    79.70
2021.83    0.161    79.08
2021.93    0.161    78.46
2022.03    0.160    77.83
2022.13    0.159    77.19
2022.23    0.159    76.55
2022.33    0.158    75.90
2022.43    0.157    75.25
2022.53    0.156    74.58
2022.63    0.155    73.91
2022.73    0.154    73.23
2022.83    0.153    72.54
2022.93    0.152    71.84
2023.03    0.150    71.13
2023.13    0.149    70.40
2023.23    0.147    69.66
2023.33    0.146    68.91
2023.43    0.144    68.14
2023.53    0.143    67.35
2023.63    0.141    66.54
2023.73    0.139    65.72
2023.83    0.137    64.87
2023.93    0.135    63.99
2024.03    0.133    63.09
2024.13    0.131    62.17
2024.23    0.129    61.21
2024.33    0.127    60.22
2024.43    0.125    59.19
2024.53    0.122    58.13
2024.63    0.120    57.03
2024.73    0.118    55.87
2024.83    0.115    54.67
2024.93    0.112    53.42
2025.03    0.110    52.11
2025.13    0.107    50.73
2025.23    0.105    49.28
2025.33    0.102    47.76
2025.43    0.099    46.15
2025.53    0.096    44.45
2025.63    0.094    42.65
2025.73    0.091    40.74
2025.83    0.088    38.72
2025.93    0.085    36.56
2026.03    0.083    34.26
2026.13    0.080    31.80
2026.23    0.077    29.18
2026.33    0.075    26.38
2026.43    0.073    23.39
2026.53    0.070    20.20
2026.63    0.068    16.80
2026.73    0.066    13.20
2026.83    0.064     9.38
2026.93    0.063     5.35
2027.03    0.061     1.14
2027.13    0.060   356.76
2027.23    0.060   352.25
2027.33    0.059   347.64
2027.43    0.059   342.98
2027.53    0.059   338.32
2027.63    0.060   333.71
2027.73    0.060   329.18
2027.83    0.061   324.79
2027.93    0.063   320.56
2028.03    0.064   316.52
2028.13    0.066   312.67
2028.23    0.068   309.03
2028.33    0.070   305.61
2028.43    0.072   302.38
2028.53    0.074   299.36
2028.63    0.077   296.52
2028.73    0.079   293.86
2028.83    0.082   291.36
2028.93    0.084   289.01
2029.03    0.087   286.80
2029.13    0.090   284.72
2029.23    0.092   282.75
2029.33    0.095   280.90
2029.43    0.097   279.14
2029.53    0.100   277.46
2029.63    0.102   275.87
2029.73    0.105   274.35
2029.83    0.107   272.90
2029.93    0.109   271.51
2030.03    0.111   270.18
2030.13    0.113   268.89
2030.23    0.115   267.65
2030.33    0.117   266.46
2030.43    0.119   265.30
2030.53    0.121   264.17
2030.63    0.123   263.08
2030.73    0.124   262.02
2030.83    0.126   260.98
2030.93    0.127   259.97
2031.03    0.129   258.97
2031.13    0.130   258.00
2031.23    0.131   257.05
2031.33    0.132   256.11
2031.43    0.133   255.18
2031.53    0.134   254.27
2031.63    0.135   253.37
2031.73    0.135   252.48
2031.83    0.136   251.59
2031.93    0.136   250.72
2032.03    0.137   249.85
2032.13    0.137   248.98
2032.23    0.138   248.13
2032.33    0.138   247.27
2032.43    0.138   246.41
2032.53    0.138   245.56
2032.63    0.138   244.71
2032.73    0.138   243.85
2032.83    0.138   243.00
2032.93    0.138   242.14
2033.03    0.137   241.28
2033.13    0.137   240.42
2033.23    0.137   239.55
2033.33    0.136   238.68
2033.43    0.136   237.80
2033.53    0.135   236.92
2033.63    0.135   236.02
2033.73    0.134   235.12
2033.83    0.133   234.21
2033.93    0.132   233.29
2034.03    0.132   232.36
2034.13    0.131   231.42
2034.23    0.130   230.47
2034.33    0.129   229.50
2034.43    0.128   228.52
2034.53    0.127   227.53
2034.63    0.126   226.52
2034.73    0.125   225.50
2034.83    0.124   224.46
2034.93    0.123   223.40
2035.03    0.122   222.33
2035.13    0.121   221.23
2035.23    0.120   220.12
2035.33    0.119   218.99
2035.43    0.118   217.84
2035.53    0.117   216.66
2035.63    0.116   215.47
2035.73    0.115   214.25
2035.83    0.114   213.01
2035.93    0.113   211.75
2036.03    0.112   210.46
2036.13    0.111   209.15
2036.23    0.110   207.81
2036.33    0.109   206.45
2036.43    0.108   205.06
2036.53    0.107   203.65
2036.63    0.106   202.21
2036.73    0.105   200.75
2036.83    0.104   199.26
2036.93    0.103   197.74
2037.03    0.102   196.20
2037.13    0.102   194.64
2037.23    0.101   193.05
2037.33    0.100   191.44
2037.43    0.099   189.81
2037.53    0.099   188.16
2037.63    0.098   186.48
2037.73    0.098   184.79
2037.83    0.097   183.08

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 17:35:25