Double Star Calculator - Orbit

Orbital Elements for BU1185
WDS: BU1185 WDS ID/Discoverer
P: 27.518 Orbital period (years)
a: 0.253 Semi-major axis (arcseconds)
i: 97.34 Inclination (degrees)
Ω: 23.2 Longitude of ascending node (degrees)
T: 2031.160 Epoch of periastron passage (year)
e: 0.0354 Eccentricity
ω: 335.4 Longitude of periastron (degrees)
Start-Year: 2011.241 Year
End-Year: 2038.759 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU1185
Position: 042551.66+185150.9 Epoch-2000 right ascension and declination
WDS-ID: 04259+1852 WDS designation
Discoverer Code: BU1185 Discover designation and components
ADS number: 3210 Aitken Double Star catalog
HD number: 27989 HD catalog number
Hipparcos number: 20686 Hipparcos catalog number
V1: 8.09 Magnitude of the primary
V2: 8.89 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2024 Date of last observation
Orbit grade: 2 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Sca2024a Reference

Double Star Orbit for BU1185



WDS 6th Orbit including measures of BU1185

-- 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 BU1185
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.032   106.85
--------------------------
2011.24    0.059   350.41
2011.34    0.054   347.08
2011.44    0.050   343.15
2011.54    0.046   338.51
2011.64    0.042   333.00
2011.74    0.039   326.49
2011.84    0.036   318.89
2011.94    0.034   310.23
2012.04    0.033   300.72
2012.14    0.033   290.80
2012.24    0.034   281.03
2012.34    0.035   271.93
2012.44    0.038   263.82
2012.54    0.041   256.80
2012.64    0.044   250.84
2012.74    0.048   245.81
2012.84    0.052   241.57
2012.94    0.057   237.97
2013.04    0.061   234.91
2013.14    0.066   232.28
2013.24    0.071   230.00
2013.34    0.076   228.02
2013.44    0.081   226.27
2013.54    0.086   224.73
2013.64    0.091   223.35
2013.74    0.096   222.12
2013.84    0.101   221.01
2013.94    0.106   220.01
2014.04    0.111   219.09
2014.14    0.115   218.25
2014.24    0.120   217.48
2014.34    0.125   216.77
2014.44    0.130   216.11
2014.54    0.135   215.50
2014.64    0.139   214.93
2014.74    0.144   214.40
2014.84    0.149   213.90
2014.94    0.153   213.43
2015.04    0.158   212.99
2015.14    0.162   212.57
2015.24    0.166   212.17
2015.34    0.170   211.79
2015.44    0.175   211.43
2015.54    0.179   211.09
2015.64    0.183   210.76
2015.74    0.187   210.45
2015.84    0.191   210.15
2015.94    0.194   209.86
2016.04    0.198   209.58
2016.14    0.202   209.31
2016.24    0.205   209.06
2016.34    0.209   208.81
2016.44    0.212   208.56
2016.54    0.215   208.33
2016.64    0.218   208.10
2016.74    0.221   207.88
2016.84    0.224   207.66
2016.94    0.227   207.45
2017.04    0.230   207.25
2017.14    0.232   207.05
2017.24    0.235   206.85
2017.34    0.237   206.66
2017.44    0.239   206.47
2017.54    0.242   206.29
2017.64    0.244   206.11
2017.74    0.246   205.93
2017.84    0.248   205.75
2017.94    0.249   205.58
2018.04    0.251   205.41
2018.14    0.252   205.24
2018.24    0.254   205.07
2018.34    0.255   204.91
2018.44    0.256   204.74
2018.54    0.257   204.58
2018.64    0.258   204.42
2018.74    0.259   204.26
2018.84    0.260   204.10
2018.94    0.260   203.94
2019.04    0.261   203.79
2019.14    0.261   203.63
2019.24    0.261   203.47
2019.34    0.261   203.31
2019.44    0.261   203.16
2019.54    0.261   203.00
2019.64    0.261   202.84
2019.74    0.260   202.69
2019.84    0.260   202.53
2019.94    0.259   202.37
2020.04    0.258   202.21
2020.14    0.257   202.05
2020.24    0.256   201.88
2020.34    0.255   201.72
2020.44    0.254   201.56
2020.54    0.252   201.39
2020.64    0.251   201.22
2020.74    0.249   201.05
2020.84    0.248   200.88
2020.94    0.246   200.70
2021.04    0.244   200.52
2021.14    0.242   200.34
2021.24    0.239   200.16
2021.34    0.237   199.97
2021.44    0.235   199.77
2021.54    0.232   199.58
2021.64    0.229   199.38
2021.74    0.227   199.17
2021.84    0.224   198.96
2021.94    0.221   198.74
2022.04    0.218   198.52
2022.14    0.214   198.29
2022.24    0.211   198.06
2022.34    0.208   197.81
2022.44    0.204   197.56
2022.54    0.201   197.30
2022.64    0.197   197.03
2022.74    0.193   196.75
2022.84    0.189   196.46
2022.94    0.185   196.15
2023.04    0.181   195.83
2023.14    0.177   195.50
2023.24    0.173   195.15
2023.34    0.169   194.79
2023.44    0.164   194.40
2023.54    0.160   193.99
2023.64    0.155   193.56
2023.74    0.151   193.10
2023.84    0.146   192.62
2023.94    0.141   192.10
2024.04    0.136   191.54
2024.14    0.132   190.95
2024.24    0.127   190.31
2024.34    0.122   189.61
2024.44    0.117   188.86
2024.54    0.112   188.04
2024.64    0.107   187.14
2024.74    0.102   186.16
2024.84    0.096   185.07
2024.94    0.091   183.85
2025.04    0.086   182.49
2025.14    0.081   180.96
2025.24    0.076   179.23
2025.34    0.071   177.24
2025.44    0.066   174.95
2025.54    0.061   172.29
2025.64    0.056   169.17
2025.74    0.052   165.48
2025.84    0.047   161.08
2025.94    0.043   155.82
2026.04    0.039   149.52
2026.14    0.036   142.03
2026.24    0.034   133.31
2026.34    0.032   123.51
2026.44    0.032   113.06
2026.54    0.032   102.61
2026.64    0.034    92.80
2026.74    0.036    84.05
2026.84    0.039    76.54
2026.94    0.043    70.21
2027.04    0.047    64.93
2027.14    0.051    60.52
2027.24    0.056    56.82
2027.34    0.061    53.69
2027.44    0.066    51.02
2027.54    0.071    48.72
2027.64    0.076    46.73
2027.74    0.081    44.99
2027.84    0.086    43.45
2027.94    0.091    42.09
2028.04    0.096    40.87
2028.14    0.101    39.77
2028.24    0.106    38.78
2028.34    0.111    37.88
2028.44    0.116    37.06
2028.54    0.121    36.30
2028.64    0.126    35.60
2028.74    0.131    34.96
2028.84    0.136    34.36
2028.94    0.141    33.80
2029.04    0.145    33.28
2029.14    0.150    32.79
2029.24    0.154    32.32
2029.34    0.159    31.89
2029.44    0.163    31.48
2029.54    0.167    31.08
2029.64    0.172    30.71
2029.74    0.176    30.36
2029.84    0.180    30.02
2029.94    0.184    29.70
2030.04    0.187    29.39
2030.14    0.191    29.09
2030.24    0.195    28.80
2030.34    0.198    28.52
2030.44    0.202    28.26
2030.54    0.205    28.00
2030.64    0.208    27.75
2030.74    0.211    27.50
2030.84    0.214    27.26
2030.94    0.217    27.03
2031.04    0.219    26.81
2031.14    0.222    26.59
2031.24    0.224    26.37
2031.34    0.226    26.16
2031.44    0.229    25.96
2031.54    0.231    25.75
2031.64    0.233    25.55
2031.74    0.234    25.36
2031.84    0.236    25.17
2031.94    0.237    24.97
2032.04    0.239    24.79
2032.14    0.240    24.60
2032.24    0.241    24.41
2032.34    0.242    24.23
2032.44    0.243    24.05
2032.54    0.244    23.87
2032.64    0.244    23.69
2032.74    0.244    23.51
2032.84    0.245    23.33
2032.94    0.245    23.15
2033.04    0.245    22.97
2033.14    0.245    22.80
2033.24    0.244    22.62
2033.34    0.244    22.44
2033.44    0.243    22.26
2033.54    0.243    22.08
2033.64    0.242    21.89
2033.74    0.241    21.71
2033.84    0.240    21.53
2033.94    0.238    21.34
2034.04    0.237    21.15
2034.14    0.236    20.96
2034.24    0.234    20.76
2034.34    0.232    20.57
2034.44    0.230    20.37
2034.54    0.228    20.16
2034.64    0.226    19.96
2034.74    0.224    19.74
2034.84    0.221    19.53
2034.94    0.219    19.31
2035.04    0.216    19.08
2035.14    0.213    18.85
2035.24    0.211    18.61
2035.34    0.208    18.37
2035.44    0.204    18.12
2035.54    0.201    17.86
2035.64    0.198    17.59
2035.74    0.195    17.31
2035.84    0.191    17.02
2035.94    0.187    16.72
2036.04    0.184    16.41
2036.14    0.180    16.09
2036.24    0.176    15.75
2036.34    0.172    15.40
2036.44    0.168    15.03
2036.54    0.164    14.64
2036.64    0.160    14.23
2036.74    0.155    13.80
2036.84    0.151    13.34
2036.94    0.146    12.86
2037.04    0.142    12.35
2037.14    0.137    11.80
2037.24    0.133    11.21
2037.34    0.128    10.58
2037.44    0.123     9.90
2037.54    0.118     9.17
2037.64    0.114     8.37
2037.74    0.109     7.50
2037.84    0.104     6.56
2037.94    0.099     5.51
2038.04    0.094     4.36
2038.14    0.089     3.08
2038.24    0.084     1.65
2038.34    0.079     0.03
2038.44    0.074   358.21
2038.54    0.069   356.13
2038.64    0.064   353.73
2038.74    0.060   350.96






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 15:23:37



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