Double Star Calculator - Orbit

Orbital Elements for HDS1898

WDS:	HDS1898	WDS ID/Discoverer
P:	30.000	Orbital period (years)
a:	0.3056	Semi-major axis (arcseconds)
i:	74.0	Inclination (degrees)
Ω:	251.0	Longitude of ascending node (degrees)
T:	2001.800	Epoch of periastron passage (year)
e:	0.82	Eccentricity
ω:	94.1	Longitude of periastron (degrees)
Start-Year:	2010.0	Year
End-Year:	2040.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1898
Position:	133241.78+223007.3	Epoch-2000 right ascension and declination
WDS-ID:	13327+2230	WDS designation
Discoverer Code:	HDS1898	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	66072	Hipparcos catalog number
V1:	10.33	Magnitude of the primary
V2:	10.84	Magnitude of the secondary
Equinox:		Equinox
Date:	2019	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Tok2020e	Reference

Double Star Orbit for HDS1898

WDS 6th Orbit including measures of HDS1898

-- 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 HDS1898

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.211   225.24
--------------------------
2010.00    0.160   124.50
2010.10    0.160   125.19
2010.20    0.159   125.89
2010.30    0.159   126.59
2010.40    0.158   127.29
2010.50    0.158   128.00
2010.60    0.157   128.71
2010.70    0.157   129.43
2010.80    0.157   130.15
2010.90    0.156   130.87
2011.00    0.156   131.59
2011.10    0.156   132.32
2011.20    0.155   133.06
2011.30    0.155   133.79
2011.40    0.155   134.53
2011.50    0.154   135.27
2011.60    0.154   136.02
2011.70    0.154   136.77
2011.80    0.153   137.52
2011.90    0.153   138.27
2012.00    0.153   139.03
2012.10    0.153   139.79
2012.20    0.152   140.55
2012.30    0.152   141.31
2012.40    0.152   142.08
2012.50    0.152   142.84
2012.60    0.151   143.61
2012.70    0.151   144.38
2012.80    0.151   145.16
2012.90    0.151   145.93
2013.00    0.151   146.71
2013.10    0.151   147.48
2013.20    0.151   148.26
2013.30    0.151   149.04
2013.40    0.151   149.82
2013.50    0.151   150.60
2013.60    0.151   151.38
2013.70    0.151   152.16
2013.80    0.151   152.94
2013.90    0.151   153.72
2014.00    0.151   154.50
2014.10    0.151   155.28
2014.20    0.151   156.06
2014.30    0.151   156.84
2014.40    0.151   157.61
2014.50    0.151   158.39
2014.60    0.151   159.16
2014.70    0.151   159.94
2014.80    0.151   160.71
2014.90    0.152   161.48
2015.00    0.152   162.25
2015.10    0.152   163.01
2015.20    0.152   163.77
2015.30    0.153   164.54
2015.40    0.153   165.29
2015.50    0.153   166.05
2015.60    0.153   166.80
2015.70    0.154   167.55
2015.80    0.154   168.30
2015.90    0.154   169.04
2016.00    0.155   169.78
2016.10    0.155   170.52
2016.20    0.155   171.26
2016.30    0.156   171.99
2016.40    0.156   172.71
2016.50    0.157   173.43
2016.60    0.157   174.15
2016.70    0.158   174.87
2016.80    0.158   175.58
2016.90    0.158   176.28
2017.00    0.159   176.99
2017.10    0.159   177.68
2017.20    0.160   178.38
2017.30    0.160   179.06
2017.40    0.161   179.75
2017.50    0.162   180.43
2017.60    0.162   181.10
2017.70    0.163   181.77
2017.80    0.163   182.44
2017.90    0.164   183.10
2018.00    0.164   183.76
2018.10    0.165   184.41
2018.20    0.166   185.05
2018.30    0.166   185.70
2018.40    0.167   186.33
2018.50    0.168   186.97
2018.60    0.168   187.59
2018.70    0.169   188.22
2018.80    0.170   188.83
2018.90    0.170   189.45
2019.00    0.171   190.06
2019.10    0.172   190.66
2019.20    0.172   191.26
2019.30    0.173   191.85
2019.40    0.174   192.44
2019.50    0.174   193.02
2019.60    0.175   193.60
2019.70    0.176   194.18
2019.80    0.176   194.75
2019.90    0.177   195.32
2020.00    0.178   195.88
2020.10    0.179   196.43
2020.20    0.179   196.99
2020.30    0.180   197.53
2020.40    0.181   198.08
2020.50    0.181   198.62
2020.60    0.182   199.15
2020.70    0.183   199.68
2020.80    0.184   200.21
2020.90    0.184   200.73
2021.00    0.185   201.25
2021.10    0.186   201.76
2021.20    0.187   202.27
2021.30    0.187   202.78
2021.40    0.188   203.28
2021.50    0.189   203.78
2021.60    0.189   204.27
2021.70    0.190   204.76
2021.80    0.191   205.25
2021.90    0.192   205.73
2022.00    0.192   206.21
2022.10    0.193   206.69
2022.20    0.194   207.16
2022.30    0.194   207.63
2022.40    0.195   208.09
2022.50    0.196   208.56
2022.60    0.196   209.02
2022.70    0.197   209.47
2022.80    0.198   209.93
2022.90    0.198   210.38
2023.00    0.199   210.83
2023.10    0.200   211.27
2023.20    0.200   211.71
2023.30    0.201   212.15
2023.40    0.202   212.59
2023.50    0.202   213.02
2023.60    0.203   213.45
2023.70    0.203   213.88
2023.80    0.204   214.31
2023.90    0.204   214.74
2024.00    0.205   215.16
2024.10    0.205   215.58
2024.20    0.206   216.00
2024.30    0.206   216.41
2024.40    0.207   216.83
2024.50    0.207   217.24
2024.60    0.208   217.65
2024.70    0.208   218.06
2024.80    0.208   218.47
2024.90    0.209   218.87
2025.00    0.209   219.28
2025.10    0.210   219.68
2025.20    0.210   220.08
2025.30    0.210   220.48
2025.40    0.210   220.88
2025.50    0.211   221.28
2025.60    0.211   221.68
2025.70    0.211   222.08
2025.80    0.211   222.48
2025.90    0.211   222.87
2026.00    0.211   223.27
2026.10    0.212   223.66
2026.20    0.212   224.06
2026.30    0.212   224.45
2026.40    0.212   224.85
2026.50    0.211   225.24
2026.60    0.211   225.64
2026.70    0.211   226.03
2026.80    0.211   226.43
2026.90    0.211   226.83
2027.00    0.211   227.23
2027.10    0.210   227.63
2027.20    0.210   228.03
2027.30    0.210   228.43
2027.40    0.209   228.83
2027.50    0.209   229.24
2027.60    0.208   229.64
2027.70    0.207   230.05
2027.80    0.207   230.47
2027.90    0.206   230.88
2028.00    0.205   231.30
2028.10    0.204   231.72
2028.20    0.203   232.15
2028.30    0.202   232.58
2028.40    0.201   233.01
2028.50    0.200   233.45
2028.60    0.199   233.89
2028.70    0.197   234.35
2028.80    0.196   234.80
2028.90    0.194   235.27
2029.00    0.193   235.74
2029.10    0.191   236.22
2029.20    0.189   236.71
2029.30    0.187   237.21
2029.40    0.184   237.73
2029.50    0.182   238.25
2029.60    0.179   238.79
2029.70    0.177   239.35
2029.80    0.174   239.93
2029.90    0.171   240.52
2030.00    0.167   241.14
2030.10    0.163   241.79
2030.20    0.159   242.47
2030.30    0.155   243.18
2030.40    0.151   243.94
2030.50    0.145   244.74
2030.60    0.140   245.61
2030.70    0.134   246.55
2030.80    0.127   247.59
2030.90    0.120   248.75
2031.00    0.112   250.06
2031.10    0.103   251.59
2031.20    0.093   253.44
2031.30    0.081   255.77
2031.40    0.069   258.93
2031.50    0.054   263.69
2031.60    0.038   272.28
2031.70    0.022   293.61
2031.80    0.016   355.58
2031.90    0.028    40.27
2032.00    0.044    54.80
2032.10    0.059    61.58
2032.20    0.072    65.69
2032.30    0.084    68.60
2032.40    0.094    70.84
2032.50    0.102    72.67
2032.60    0.110    74.24
2032.70    0.117    75.62
2032.80    0.123    76.85
2032.90    0.128    77.98
2033.00    0.132    79.02
2033.10    0.137    80.00
2033.20    0.140    80.92
2033.30    0.144    81.80
2033.40    0.147    82.63
2033.50    0.150    83.44
2033.60    0.152    84.21
2033.70    0.155    84.97
2033.80    0.157    85.70
2033.90    0.159    86.41
2034.00    0.160    87.10
2034.10    0.162    87.78
2034.20    0.163    88.45
2034.30    0.165    89.11
2034.40    0.166    89.76
2034.50    0.167    90.40
2034.60    0.168    91.03
2034.70    0.169    91.65
2034.80    0.169    92.27
2034.90    0.170    92.89
2035.00    0.171    93.49
2035.10    0.171    94.10
2035.20    0.172    94.70
2035.30    0.172    95.30
2035.40    0.173    95.89
2035.50    0.173    96.49
2035.60    0.173    97.08
2035.70    0.173    97.67
2035.80    0.173    98.26
2035.90    0.173    98.84
2036.00    0.173    99.43
2036.10    0.174   100.02
2036.20    0.173   100.61
2036.30    0.173   101.19
2036.40    0.173   101.78
2036.50    0.173   102.37
2036.60    0.173   102.96
2036.70    0.173   103.55
2036.80    0.173   104.14
2036.90    0.172   104.74
2037.00    0.172   105.33
2037.10    0.172   105.93
2037.20    0.172   106.53
2037.30    0.171   107.13
2037.40    0.171   107.73
2037.50    0.171   108.34
2037.60    0.170   108.95
2037.70    0.170   109.56
2037.80    0.170   110.17
2037.90    0.169   110.79
2038.00    0.169   111.41
2038.10    0.168   112.03
2038.20    0.168   112.65
2038.30    0.168   113.28
2038.40    0.167   113.91
2038.50    0.167   114.55
2038.60    0.166   115.19
2038.70    0.166   115.83
2038.80    0.165   116.47
2038.90    0.165   117.12
2039.00    0.164   117.77
2039.10    0.164   118.43
2039.20    0.164   119.09
2039.30    0.163   119.75
2039.40    0.163   120.42
2039.50    0.162   121.09
2039.60    0.162   121.76
2039.70    0.161   122.44
2039.80    0.161   123.12
2039.90    0.160   123.81

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 16:57:15