Double Star Calculator - Orbit

Orbital Elements for B2545AB

WDS:	B2545AB	WDS ID/Discoverer
P:	23.900	Orbital period (years)
a:	0.062	Semi-major axis (arcseconds)
i:	37.9	Inclination (degrees)
Ω:	244.1	Longitude of ascending node (degrees)
T:	1971.810	Epoch of periastron passage (year)
e:	0.706	Eccentricity
ω:	172.1	Longitude of periastron (degrees)
Start-Year:	2013.05	Year
End-Year:	2036.95	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B2545AB
Position:	181145.11+332649.3	Epoch-2000 right ascension and declination
WDS-ID:	18118+3327	WDS designation
Discoverer Code:	B2545AB	Discover designation and components
ADS number:	11149	Aitken Double Star catalog
HD number:	166988	HD catalog number
Hipparcos number:	89156	Hipparcos catalog number
V1:	6.5	Magnitude of the primary
V2:	6.8	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Hrt1989	Reference

Double Star Orbit for B2545AB

WDS 6th Orbit including measures of B2545AB

-- 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 B2545AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.088   221.13
--------------------------
2013.05    0.089   255.29
2013.15    0.088   255.71
2013.25    0.088   256.12
2013.35    0.087   256.55
2013.45    0.086   256.98
2013.55    0.085   257.42
2013.65    0.085   257.86
2013.75    0.084   258.32
2013.85    0.083   258.78
2013.95    0.082   259.26
2014.05    0.082   259.74
2014.15    0.081   260.23
2014.25    0.080   260.73
2014.35    0.079   261.25
2014.45    0.078   261.77
2014.55    0.077   262.31
2014.65    0.076   262.86
2014.75    0.075   263.43
2014.85    0.074   264.01
2014.95    0.073   264.60
2015.05    0.072   265.21
2015.15    0.071   265.84
2015.25    0.070   266.49
2015.35    0.069   267.16
2015.45    0.068   267.85
2015.55    0.067   268.56
2015.65    0.066   269.29
2015.75    0.065   270.05
2015.85    0.063   270.84
2015.95    0.062   271.67
2016.05    0.061   272.52
2016.15    0.060   273.41
2016.25    0.058   274.33
2016.35    0.057   275.30
2016.45    0.056   276.31
2016.55    0.055   277.37
2016.65    0.053   278.49
2016.75    0.052   279.66
2016.85    0.050   280.90
2016.95    0.049   282.22
2017.05    0.048   283.61
2017.15    0.046   285.09
2017.25    0.045   286.67
2017.35    0.043   288.36
2017.45    0.041   290.17
2017.55    0.040   292.12
2017.65    0.038   294.24
2017.75    0.037   296.53
2017.85    0.035   299.04
2017.95    0.034   301.78
2018.05    0.032   304.80
2018.15    0.030   308.15
2018.25    0.029   311.86
2018.35    0.027   316.00
2018.45    0.026   320.63
2018.55    0.024   325.83
2018.65    0.023   331.68
2018.75    0.022   338.24
2018.85    0.020   345.55
2018.95    0.020   353.64
2019.05    0.019     2.44
2019.15    0.018    11.86
2019.25    0.018    21.71
2019.35    0.018    31.79
2019.45    0.018    41.91
2019.55    0.018    51.93
2019.65    0.018    61.76
2019.75    0.018    71.36
2019.85    0.019    80.70
2019.95    0.019    89.77
2020.05    0.019    98.52
2020.15    0.020   106.88
2020.25    0.021   114.80
2020.35    0.021   122.23
2020.45    0.022   129.13
2020.55    0.023   135.49
2020.65    0.024   141.32
2020.75    0.025   146.64
2020.85    0.026   151.49
2020.95    0.028   155.91
2021.05    0.029   159.93
2021.15    0.030   163.60
2021.25    0.032   166.96
2021.35    0.033   170.04
2021.45    0.035   172.87
2021.55    0.036   175.48
2021.65    0.037   177.89
2021.75    0.039   180.13
2021.85    0.040   182.21
2021.95    0.042   184.16
2022.05    0.043   185.97
2022.15    0.044   187.68
2022.25    0.046   189.28
2022.35    0.047   190.79
2022.45    0.048   192.22
2022.55    0.050   193.57
2022.65    0.051   194.86
2022.75    0.052   196.07
2022.85    0.053   197.24
2022.95    0.055   198.34
2023.05    0.056   199.40
2023.15    0.057   200.42
2023.25    0.058   201.39
2023.35    0.059   202.32
2023.45    0.061   203.22
2023.55    0.062   204.09
2023.65    0.063   204.92
2023.75    0.064   205.73
2023.85    0.065   206.50
2023.95    0.066   207.25
2024.05    0.067   207.98
2024.15    0.068   208.69
2024.25    0.069   209.37
2024.35    0.070   210.04
2024.45    0.071   210.69
2024.55    0.072   211.31
2024.65    0.073   211.93
2024.75    0.074   212.52
2024.85    0.075   213.11
2024.95    0.076   213.68
2025.05    0.077   214.23
2025.15    0.078   214.77
2025.25    0.079   215.30
2025.35    0.079   215.82
2025.45    0.080   216.33
2025.55    0.081   216.83
2025.65    0.082   217.32
2025.75    0.083   217.79
2025.85    0.083   218.26
2025.95    0.084   218.73
2026.05    0.085   219.18
2026.15    0.086   219.62
2026.25    0.086   220.06
2026.35    0.087   220.49
2026.45    0.088   220.92
2026.55    0.088   221.34
2026.65    0.089   221.75
2026.75    0.090   222.15
2026.85    0.090   222.55
2026.95    0.091   222.95
2027.05    0.091   223.34
2027.15    0.092   223.72
2027.25    0.093   224.10
2027.35    0.093   224.47
2027.45    0.094   224.84
2027.55    0.094   225.21
2027.65    0.095   225.57
2027.75    0.095   225.93
2027.85    0.096   226.28
2027.95    0.096   226.64
2028.05    0.097   226.98
2028.15    0.097   227.33
2028.25    0.098   227.67
2028.35    0.098   228.01
2028.45    0.099   228.34
2028.55    0.099   228.67
2028.65    0.099   229.00
2028.75    0.100   229.33
2028.85    0.100   229.65
2028.95    0.100   229.98
2029.05    0.101   230.30
2029.15    0.101   230.61
2029.25    0.101   230.93
2029.35    0.102   231.24
2029.45    0.102   231.55
2029.55    0.102   231.86
2029.65    0.103   232.17
2029.75    0.103   232.48
2029.85    0.103   232.79
2029.95    0.103   233.09
2030.05    0.104   233.39
2030.15    0.104   233.69
2030.25    0.104   233.99
2030.35    0.104   234.29
2030.45    0.104   234.59
2030.55    0.104   234.89
2030.65    0.105   235.18
2030.75    0.105   235.48
2030.85    0.105   235.77
2030.95    0.105   236.07
2031.05    0.105   236.36
2031.15    0.105   236.65
2031.25    0.105   236.95
2031.35    0.105   237.24
2031.45    0.105   237.53
2031.55    0.105   237.82
2031.65    0.105   238.11
2031.75    0.105   238.40
2031.85    0.105   238.70
2031.95    0.105   238.99
2032.05    0.105   239.28
2032.15    0.105   239.57
2032.25    0.105   239.86
2032.35    0.105   240.15
2032.45    0.105   240.44
2032.55    0.105   240.74
2032.65    0.105   241.03
2032.75    0.105   241.32
2032.85    0.105   241.62
2032.95    0.105   241.91
2033.05    0.105   242.21
2033.15    0.104   242.50
2033.25    0.104   242.80
2033.35    0.104   243.10
2033.45    0.104   243.40
2033.55    0.104   243.70
2033.65    0.103   244.00
2033.75    0.103   244.30
2033.85    0.103   244.61
2033.95    0.103   244.91
2034.05    0.103   245.22
2034.15    0.102   245.53
2034.25    0.102   245.84
2034.35    0.102   246.15
2034.45    0.101   246.46
2034.55    0.101   246.78
2034.65    0.101   247.10
2034.75    0.100   247.42
2034.85    0.100   247.74
2034.95    0.100   248.07
2035.05    0.099   248.40
2035.15    0.099   248.73
2035.25    0.098   249.06
2035.35    0.098   249.39
2035.45    0.097   249.73
2035.55    0.097   250.08
2035.65    0.097   250.42
2035.75    0.096   250.77
2035.85    0.096   251.12
2035.95    0.095   251.48
2036.05    0.094   251.84
2036.15    0.094   252.20
2036.25    0.093   252.57
2036.35    0.093   252.95
2036.45    0.092   253.33
2036.55    0.092   253.71
2036.65    0.091   254.10
2036.75    0.090   254.49
2036.85    0.090   254.89
2036.95    0.089   255.29

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 17:49:02