Double Star Calculator - Orbit

Orbital Elements for A1928

WDS:	A1928	WDS ID/Discoverer
P:	17.920	Orbital period (years)
a:	0.138	Semi-major axis (arcseconds)
i:	45.1	Inclination (degrees)
Ω:	58.9	Longitude of ascending node (degrees)
T:	2009.170	Epoch of periastron passage (year)
e:	0.463	Eccentricity
ω:	354.1	Longitude of periastron (degrees)
Start-Year:	2016.04	Year
End-Year:	2033.96	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1928
Position:	023951.75+000848.1	Epoch-2000 right ascension and declination
WDS-ID:	02399+0009	WDS designation
Discoverer Code:	A1928	Discover designation and components
ADS number:	2028	Aitken Double Star catalog
HD number:	16619	HD catalog number
Hipparcos number:	12421	Hipparcos catalog number
V1:	8.6	Magnitude of the primary
V2:	8.6	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1999	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:	Doc2009g	Reference

Double Star Orbit for A1928

WDS 6th Orbit including measures of A1928

-- 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 A1928

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.070    27.45
--------------------------
2016.04    0.186   221.63
2016.14    0.187   222.32
2016.24    0.188   223.00
2016.34    0.190   223.67
2016.44    0.191   224.33
2016.54    0.192   224.99
2016.64    0.193   225.64
2016.74    0.194   226.28
2016.84    0.195   226.91
2016.94    0.196   227.54
2017.04    0.196   228.16
2017.14    0.197   228.78
2017.24    0.198   229.40
2017.34    0.198   230.01
2017.44    0.199   230.61
2017.54    0.199   231.22
2017.64    0.200   231.82
2017.74    0.200   232.42
2017.84    0.201   233.01
2017.94    0.201   233.60
2018.04    0.201   234.20
2018.14    0.201   234.79
2018.24    0.201   235.38
2018.34    0.202   235.97
2018.44    0.202   236.56
2018.54    0.201   237.14
2018.64    0.201   237.73
2018.74    0.201   238.33
2018.84    0.201   238.92
2018.94    0.201   239.51
2019.04    0.200   240.11
2019.14    0.200   240.70
2019.24    0.199   241.30
2019.34    0.199   241.91
2019.44    0.198   242.51
2019.54    0.198   243.12
2019.64    0.197   243.74
2019.74    0.196   244.36
2019.84    0.195   244.98
2019.94    0.195   245.61
2020.04    0.194   246.25
2020.14    0.193   246.89
2020.24    0.192   247.54
2020.34    0.190   248.20
2020.44    0.189   248.86
2020.54    0.188   249.53
2020.64    0.187   250.21
2020.74    0.185   250.91
2020.84    0.184   251.61
2020.94    0.182   252.32
2021.04    0.181   253.05
2021.14    0.179   253.79
2021.24    0.178   254.54
2021.34    0.176   255.31
2021.44    0.174   256.09
2021.54    0.172   256.89
2021.64    0.170   257.70
2021.74    0.168   258.54
2021.84    0.166   259.39
2021.94    0.164   260.27
2022.04    0.162   261.17
2022.14    0.160   262.10
2022.24    0.158   263.05
2022.34    0.155   264.03
2022.44    0.153   265.04
2022.54    0.150   266.08
2022.64    0.148   267.16
2022.74    0.145   268.27
2022.84    0.143   269.42
2022.94    0.140   270.62
2023.04    0.137   271.87
2023.14    0.135   273.16
2023.24    0.132   274.51
2023.34    0.129   275.92
2023.44    0.126   277.40
2023.54    0.123   278.94
2023.64    0.120   280.56
2023.74    0.117   282.27
2023.84    0.114   284.06
2023.94    0.111   285.95
2024.04    0.108   287.94
2024.14    0.105   290.05
2024.24    0.102   292.29
2024.34    0.099   294.66
2024.44    0.096   297.19
2024.54    0.093   299.87
2024.64    0.090   302.73
2024.74    0.087   305.77
2024.84    0.085   309.01
2024.94    0.082   312.46
2025.04    0.080   316.13
2025.14    0.077   320.03
2025.24    0.075   324.16
2025.34    0.073   328.52
2025.44    0.072   333.09
2025.54    0.070   337.87
2025.64    0.069   342.82
2025.74    0.068   347.92
2025.84    0.068   353.13
2025.94    0.067   358.41
2026.04    0.067     3.72
2026.14    0.067     9.01
2026.24    0.068    14.25
2026.34    0.068    19.41
2026.44    0.069    24.47
2026.54    0.070    29.42
2026.64    0.071    34.25
2026.74    0.072    38.96
2026.84    0.072    43.57
2026.94    0.073    48.09
2027.04    0.074    52.53
2027.14    0.074    56.91
2027.24    0.074    61.26
2027.34    0.074    65.58
2027.44    0.074    69.90
2027.54    0.074    74.24
2027.64    0.074    78.60
2027.74    0.074    83.00
2027.84    0.073    87.44
2027.94    0.073    91.94
2028.04    0.072    96.47
2028.14    0.072   101.05
2028.24    0.072   105.65
2028.34    0.072   110.27
2028.44    0.072   114.88
2028.54    0.072   119.46
2028.64    0.073   123.98
2028.74    0.074   128.43
2028.84    0.075   132.78
2028.94    0.076   137.01
2029.04    0.077   141.11
2029.14    0.079   145.06
2029.24    0.080   148.85
2029.34    0.082   152.48
2029.44    0.084   155.94
2029.54    0.086   159.23
2029.64    0.089   162.37
2029.74    0.091   165.34
2029.84    0.093   168.16
2029.94    0.096   170.84
2030.04    0.098   173.38
2030.14    0.101   175.79
2030.24    0.104   178.08
2030.34    0.106   180.25
2030.44    0.109   182.32
2030.54    0.112   184.28
2030.64    0.114   186.15
2030.74    0.117   187.94
2030.84    0.120   189.64
2030.94    0.123   191.27
2031.04    0.125   192.83
2031.14    0.128   194.33
2031.24    0.131   195.76
2031.34    0.133   197.14
2031.44    0.136   198.46
2031.54    0.138   199.74
2031.64    0.141   200.97
2031.74    0.143   202.16
2031.84    0.146   203.30
2031.94    0.148   204.41
2032.04    0.150   205.49
2032.14    0.153   206.53
2032.24    0.155   207.54
2032.34    0.157   208.53
2032.44    0.159   209.48
2032.54    0.161   210.41
2032.64    0.163   211.32
2032.74    0.165   212.21
2032.84    0.167   213.07
2032.94    0.169   213.91
2033.04    0.171   214.74
2033.14    0.173   215.55
2033.24    0.175   216.34
2033.34    0.176   217.11
2033.44    0.178   217.88
2033.54    0.180   218.62
2033.64    0.181   219.36
2033.74    0.183   220.08
2033.84    0.184   220.79
2033.94    0.186   221.49

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 15:02:32