Double Star Calculator - Orbit

Orbital Elements for HDS198
WDS: HDS198 WDS ID/Discoverer
P: 51.600 Orbital period (years)
a: 0.176 Semi-major axis (arcseconds)
i: 107.3 Inclination (degrees)
Ω: 18.5 Longitude of ascending node (degrees)
T: 2028.800 Epoch of periastron passage (year)
e: 0.7 Eccentricity
ω: 42.4 Longitude of periastron (degrees)
Start-Year: 1999.2 Year
End-Year: 2050.8 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for HDS198
Position: 013110.70-070158.0 Epoch-2000 right ascension and declination
WDS-ID: 01312-0702 WDS designation
Discoverer Code: HDS198 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 9278 HD catalog number
Hipparcos number: 7075 Hipparcos catalog number
V1: 8.19 Magnitude of the primary
V2: 9.79 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2018 Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Tok2018i Reference

Double Star Orbit for HDS198



WDS 6th Orbit including measures of HDS198

-- 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 HDS198
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.064    35.11
--------------------------
1999.20    0.244   186.40
1999.30    0.244   186.33
1999.40    0.244   186.25
1999.50    0.244   186.17
1999.60    0.243   186.09
1999.70    0.243   186.02
1999.80    0.243   185.94
1999.90    0.242   185.86
2000.00    0.242   185.78
2000.10    0.242   185.70
2000.20    0.241   185.63
2000.30    0.241   185.55
2000.40    0.241   185.47
2000.50    0.240   185.39
2000.60    0.240   185.31
2000.70    0.240   185.23
2000.80    0.239   185.15
2000.90    0.239   185.07
2001.00    0.238   184.99
2001.10    0.238   184.91
2001.20    0.238   184.83
2001.30    0.237   184.74
2001.40    0.237   184.66
2001.50    0.236   184.58
2001.60    0.236   184.50
2001.70    0.235   184.41
2001.80    0.235   184.33
2001.90    0.234   184.25
2002.00    0.234   184.16
2002.10    0.233   184.08
2002.20    0.233   184.00
2002.30    0.233   183.91
2002.40    0.232   183.83
2002.50    0.232   183.74
2002.60    0.231   183.66
2002.70    0.231   183.57
2002.80    0.230   183.48
2002.90    0.229   183.40
2003.00    0.229   183.31
2003.10    0.228   183.22
2003.20    0.228   183.13
2003.30    0.227   183.04
2003.40    0.227   182.95
2003.50    0.226   182.87
2003.60    0.226   182.78
2003.70    0.225   182.68
2003.80    0.224   182.59
2003.90    0.224   182.50
2004.00    0.223   182.41
2004.10    0.223   182.32
2004.20    0.222   182.23
2004.30    0.221   182.13
2004.40    0.221   182.04
2004.50    0.220   181.94
2004.60    0.220   181.85
2004.70    0.219   181.75
2004.80    0.218   181.66
2004.90    0.218   181.56
2005.00    0.217   181.46
2005.10    0.216   181.37
2005.20    0.216   181.27
2005.30    0.215   181.17
2005.40    0.214   181.07
2005.50    0.214   180.97
2005.60    0.213   180.87
2005.70    0.212   180.77
2005.80    0.212   180.66
2005.90    0.211   180.56
2006.00    0.210   180.46
2006.10    0.209   180.35
2006.20    0.209   180.25
2006.30    0.208   180.14
2006.40    0.207   180.04
2006.50    0.206   179.93
2006.60    0.206   179.82
2006.70    0.205   179.71
2006.80    0.204   179.60
2006.90    0.203   179.49
2007.00    0.203   179.38
2007.10    0.202   179.27
2007.20    0.201   179.16
2007.30    0.200   179.04
2007.40    0.200   178.93
2007.50    0.199   178.81
2007.60    0.198   178.69
2007.70    0.197   178.58
2007.80    0.196   178.46
2007.90    0.195   178.34
2008.00    0.195   178.22
2008.10    0.194   178.10
2008.20    0.193   177.97
2008.30    0.192   177.85
2008.40    0.191   177.73
2008.50    0.190   177.60
2008.60    0.190   177.47
2008.70    0.189   177.34
2008.80    0.188   177.21
2008.90    0.187   177.08
2009.00    0.186   176.95
2009.10    0.185   176.82
2009.20    0.184   176.68
2009.30    0.183   176.55
2009.40    0.183   176.41
2009.50    0.182   176.27
2009.60    0.181   176.13
2009.70    0.180   175.99
2009.80    0.179   175.85
2009.90    0.178   175.70
2010.00    0.177   175.56
2010.10    0.176   175.41
2010.20    0.175   175.26
2010.30    0.174   175.11
2010.40    0.173   174.96
2010.50    0.172   174.81
2010.60    0.171   174.65
2010.70    0.170   174.49
2010.80    0.169   174.33
2010.90    0.168   174.17
2011.00    0.167   174.01
2011.10    0.166   173.85
2011.20    0.165   173.68
2011.30    0.164   173.51
2011.40    0.163   173.34
2011.50    0.162   173.17
2011.60    0.161   172.99
2011.70    0.160   172.81
2011.80    0.159   172.63
2011.90    0.158   172.45
2012.00    0.157   172.27
2012.10    0.156   172.08
2012.20    0.155   171.89
2012.30    0.154   171.70
2012.40    0.153   171.50
2012.50    0.152   171.31
2012.60    0.151   171.11
2012.70    0.150   170.90
2012.80    0.149   170.70
2012.90    0.148   170.49
2013.00    0.147   170.28
2013.10    0.146   170.06
2013.20    0.145   169.85
2013.30    0.143   169.62
2013.40    0.142   169.40
2013.50    0.141   169.17
2013.60    0.140   168.94
2013.70    0.139   168.70
2013.80    0.138   168.46
2013.90    0.137   168.22
2014.00    0.136   167.97
2014.10    0.135   167.72
2014.20    0.133   167.47
2014.30    0.132   167.21
2014.40    0.131   166.94
2014.50    0.130   166.67
2014.60    0.129   166.40
2014.70    0.128   166.12
2014.80    0.127   165.84
2014.90    0.125   165.55
2015.00    0.124   165.25
2015.10    0.123   164.95
2015.20    0.122   164.65
2015.30    0.121   164.34
2015.40    0.120   164.02
2015.50    0.119   163.70
2015.60    0.117   163.37
2015.70    0.116   163.03
2015.80    0.115   162.69
2015.90    0.114   162.34
2016.00    0.113   161.98
2016.10    0.112   161.62
2016.20    0.110   161.24
2016.30    0.109   160.86
2016.40    0.108   160.47
2016.50    0.107   160.07
2016.60    0.106   159.67
2016.70    0.104   159.25
2016.80    0.103   158.82
2016.90    0.102   158.39
2017.00    0.101   157.94
2017.10    0.100   157.49
2017.20    0.098   157.02
2017.30    0.097   156.54
2017.40    0.096   156.05
2017.50    0.095   155.55
2017.60    0.094   155.03
2017.70    0.093   154.50
2017.80    0.091   153.96
2017.90    0.090   153.40
2018.00    0.089   152.83
2018.10    0.088   152.24
2018.20    0.087   151.64
2018.30    0.086   151.02
2018.40    0.084   150.39
2018.50    0.083   149.73
2018.60    0.082   149.06
2018.70    0.081   148.37
2018.80    0.080   147.66
2018.90    0.079   146.92
2019.00    0.077   146.17
2019.10    0.076   145.39
2019.20    0.075   144.59
2019.30    0.074   143.77
2019.40    0.073   142.92
2019.50    0.072   142.05
2019.60    0.071   141.15
2019.70    0.070   140.22
2019.80    0.069   139.26
2019.90    0.068   138.27
2020.00    0.067   137.26
2020.10    0.066   136.21
2020.20    0.065   135.13
2020.30    0.064   134.01
2020.40    0.063   132.86
2020.50    0.062   131.67
2020.60    0.061   130.45
2020.70    0.060   129.19
2020.80    0.059   127.89
2020.90    0.058   126.56
2021.00    0.057   125.18
2021.10    0.057   123.77
2021.20    0.056   122.31
2021.30    0.055   120.82
2021.40    0.054   119.28
2021.50    0.054   117.70
2021.60    0.053   116.09
2021.70    0.052   114.43
2021.80    0.052   112.74
2021.90    0.051   111.01
2022.00    0.051   109.25
2022.10    0.050   107.45
2022.20    0.050   105.62
2022.30    0.050   103.76
2022.40    0.049   101.87
2022.50    0.049    99.96
2022.60    0.049    98.03
2022.70    0.048    96.09
2022.80    0.048    94.13
2022.90    0.048    92.16
2023.00    0.048    90.18
2023.10    0.048    88.20
2023.20    0.048    86.23
2023.30    0.048    84.25
2023.40    0.048    82.29
2023.50    0.049    80.34
2023.60    0.049    78.41
2023.70    0.049    76.49
2023.80    0.049    74.60
2023.90    0.050    72.73
2024.00    0.050    70.89
2024.10    0.051    69.08
2024.20    0.051    67.30
2024.30    0.051    65.55
2024.40    0.052    63.83
2024.50    0.053    62.15
2024.60    0.053    60.50
2024.70    0.054    58.89
2024.80    0.054    57.31
2024.90    0.055    55.77
2025.00    0.055    54.26
2025.10    0.056    52.78
2025.20    0.057    51.34
2025.30    0.057    49.93
2025.40    0.058    48.56
2025.50    0.059    47.21
2025.60    0.059    45.89
2025.70    0.060    44.60
2025.80    0.061    43.34
2025.90    0.061    42.10
2026.00    0.062    40.89
2026.10    0.062    39.70
2026.20    0.063    38.53
2026.30    0.063    37.37
2026.40    0.064    36.24
2026.50    0.064    35.11
2026.60    0.065    34.01
2026.70    0.065    32.91
2026.80    0.065    31.82
2026.90    0.065    30.73
2027.00    0.065    29.65
2027.10    0.065    28.57
2027.20    0.065    27.49
2027.30    0.065    26.40
2027.40    0.064    25.29
2027.50    0.064    24.18
2027.60    0.063    23.04
2027.70    0.062    21.87
2027.80    0.061    20.67
2027.90    0.060    19.43
2028.00    0.059    18.13
2028.10    0.057    16.77
2028.20    0.055    15.32
2028.30    0.053    13.77
2028.40    0.051    12.09
2028.50    0.049    10.25
2028.60    0.046     8.22
2028.70    0.043     5.93
2028.80    0.040     3.31
2028.90    0.037     0.27
2029.00    0.034   356.67
2029.10    0.031   352.33
2029.20    0.028   347.01
2029.30    0.025   340.38
2029.40    0.022   332.06
2029.50    0.020   321.71
2029.60    0.019   309.29
2029.70    0.018   295.47
2029.80    0.018   281.58
2029.90    0.020   269.01
2030.00    0.022   258.49
2030.10    0.025   250.06
2030.20    0.028   243.37
2030.30    0.031   238.05
2030.40    0.035   233.77
2030.50    0.038   230.27
2030.60    0.042   227.37
2030.70    0.045   224.93
2030.80    0.049   222.84
2030.90    0.052   221.04
2031.00    0.056   219.47
2031.10    0.059   218.08
2031.20    0.063   216.85
2031.30    0.066   215.74
2031.40    0.069   214.74
2031.50    0.073   213.83
2031.60    0.076   213.01
2031.70    0.079   212.24
2031.80    0.082   211.54
2031.90    0.085   210.89
2032.00    0.089   210.28
2032.10    0.092   209.72
2032.20    0.094   209.19
2032.30    0.097   208.69
2032.40    0.100   208.22
2032.50    0.103   207.77
2032.60    0.106   207.35
2032.70    0.108   206.95
2032.80    0.111   206.57
2032.90    0.114   206.21
2033.00    0.116   205.86
2033.10    0.119   205.53
2033.20    0.121   205.21
2033.30    0.124   204.90
2033.40    0.126   204.61
2033.50    0.128   204.33
2033.60    0.131   204.05
2033.70    0.133   203.79
2033.80    0.135   203.53
2033.90    0.138   203.29
2034.00    0.140   203.05
2034.10    0.142   202.82
2034.20    0.144   202.59
2034.30    0.146   202.37
2034.40    0.148   202.16
2034.50    0.150   201.95
2034.60    0.152   201.75
2034.70    0.154   201.56
2034.80    0.156   201.37
2034.90    0.158   201.18
2035.00    0.160   201.00
2035.10    0.161   200.82
2035.20    0.163   200.64
2035.30    0.165   200.47
2035.40    0.167   200.31
2035.50    0.168   200.14
2035.60    0.170   199.98
2035.70    0.172   199.83
2035.80    0.173   199.67
2035.90    0.175   199.52
2036.00    0.177   199.37
2036.10    0.178   199.23
2036.20    0.180   199.08
2036.30    0.181   198.94
2036.40    0.183   198.80
2036.50    0.184   198.67
2036.60    0.185   198.53
2036.70    0.187   198.40
2036.80    0.188   198.27
2036.90    0.190   198.14
2037.00    0.191   198.01
2037.10    0.192   197.89
2037.20    0.194   197.77
2037.30    0.195   197.64
2037.40    0.196   197.52
2037.50    0.197   197.41
2037.60    0.199   197.29
2037.70    0.200   197.17
2037.80    0.201   197.06
2037.90    0.202   196.95
2038.00    0.203   196.83
2038.10    0.204   196.72
2038.20    0.206   196.61
2038.30    0.207   196.51
2038.40    0.208   196.40
2038.50    0.209   196.29
2038.60    0.210   196.19
2038.70    0.211   196.08
2038.80    0.212   195.98
2038.90    0.213   195.88
2039.00    0.214   195.78
2039.10    0.215   195.68
2039.20    0.216   195.58
2039.30    0.217   195.48
2039.40    0.217   195.38
2039.50    0.218   195.29
2039.60    0.219   195.19
2039.70    0.220   195.10
2039.80    0.221   195.00
2039.90    0.222   194.91
2040.00    0.223   194.82
2040.10    0.223   194.72
2040.20    0.224   194.63
2040.30    0.225   194.54
2040.40    0.226   194.45
2040.50    0.226   194.36
2040.60    0.227   194.27
2040.70    0.228   194.18
2040.80    0.229   194.10
2040.90    0.229   194.01
2041.00    0.230   193.92
2041.10    0.231   193.83
2041.20    0.231   193.75
2041.30    0.232   193.66
2041.40    0.233   193.58
2041.50    0.233   193.49
2041.60    0.234   193.41
2041.70    0.234   193.32
2041.80    0.235   193.24
2041.90    0.235   193.16
2042.00    0.236   193.08
2042.10    0.236   192.99
2042.20    0.237   192.91
2042.30    0.238   192.83
2042.40    0.238   192.75
2042.50    0.239   192.67
2042.60    0.239   192.59
2042.70    0.239   192.51
2042.80    0.240   192.43
2042.90    0.240   192.35
2043.00    0.241   192.27
2043.10    0.241   192.19
2043.20    0.242   192.11
2043.30    0.242   192.03
2043.40    0.242   191.95
2043.50    0.243   191.88
2043.60    0.243   191.80
2043.70    0.243   191.72
2043.80    0.244   191.64
2043.90    0.244   191.57
2044.00    0.244   191.49
2044.10    0.245   191.41
2044.20    0.245   191.34
2044.30    0.245   191.26
2044.40    0.246   191.18
2044.50    0.246   191.11
2044.60    0.246   191.03
2044.70    0.246   190.96
2044.80    0.247   190.88
2044.90    0.247   190.80
2045.00    0.247   190.73
2045.10    0.247   190.65
2045.20    0.247   190.58
2045.30    0.248   190.50
2045.40    0.248   190.43
2045.50    0.248   190.35
2045.60    0.248   190.28
2045.70    0.248   190.21
2045.80    0.248   190.13
2045.90    0.249   190.06
2046.00    0.249   189.98
2046.10    0.249   189.91
2046.20    0.249   189.83
2046.30    0.249   189.76
2046.40    0.249   189.69
2046.50    0.249   189.61
2046.60    0.249   189.54
2046.70    0.249   189.46
2046.80    0.249   189.39
2046.90    0.249   189.32
2047.00    0.249   189.24
2047.10    0.249   189.17
2047.20    0.249   189.09
2047.30    0.249   189.02
2047.40    0.249   188.95
2047.50    0.249   188.87
2047.60    0.249   188.80
2047.70    0.249   188.73
2047.80    0.249   188.65
2047.90    0.249   188.58
2048.00    0.249   188.50
2048.10    0.249   188.43
2048.20    0.249   188.36
2048.30    0.249   188.28
2048.40    0.249   188.21
2048.50    0.249   188.13
2048.60    0.249   188.06
2048.70    0.249   187.99
2048.80    0.248   187.91
2048.90    0.248   187.84
2049.00    0.248   187.76
2049.10    0.248   187.69
2049.20    0.248   187.61
2049.30    0.248   187.54
2049.40    0.248   187.46
2049.50    0.247   187.39
2049.60    0.247   187.31
2049.70    0.247   187.24
2049.80    0.247   187.16
2049.90    0.247   187.09
2050.00    0.246   187.01
2050.10    0.246   186.94
2050.20    0.246   186.86
2050.30    0.246   186.79
2050.40    0.245   186.71
2050.50    0.245   186.63
2050.60    0.245   186.56
2050.70    0.245   186.48
2050.80    0.244   186.40



 

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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 14:51:17


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