Double Star Calculator - Orbit

Orbital Elements for ALPTUC

WDS:	ALPTUC	WDS ID/Discoverer
P:	11.494	Orbital period (years)
a:	0.03234	Semi-major axis (arcseconds)
i:	113.0	Inclination (degrees)
Ω:	262.0	Longitude of ascending node (degrees)
T:	1989.920	Epoch of periastron passage (year)
e:	0.38	Eccentricity
ω:	76.0	Longitude of periastron (degrees)
Start-Year:	2019.2531284528309	Year
End-Year:	2030.7468715471691	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for ALPTUC
Position:	221830.18-601534.2	Epoch-2000 right ascension and declination
WDS-ID:	22185-6016	WDS designation
Discoverer Code:	ALPTUC	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	211416	HD catalog number
Hipparcos number:	110130	Hipparcos catalog number
V1:	2.86	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1991	Date of last observation
Orbit grade:	9	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	HIP1997d	Reference

Double Star Orbit for ALPTUC

WDS 6th Orbit including measures of ALPTUC

-- 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 ALPTUC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.032    79.65
--------------------------
2019.25    0.018     4.24
2019.35    0.017     0.38
2019.45    0.017   356.44
2019.55    0.017   352.43
2019.65    0.017   348.38
2019.75    0.017   344.33
2019.85    0.017   340.31
2019.95    0.017   336.33
2020.05    0.018   332.44
2020.15    0.018   328.66
2020.25    0.018   324.99
2020.35    0.018   321.46
2020.45    0.019   318.07
2020.55    0.019   314.83
2020.65    0.020   311.74
2020.75    0.020   308.80
2020.85    0.021   306.00
2020.95    0.021   303.34
2021.05    0.022   300.81
2021.15    0.022   298.40
2021.25    0.023   296.10
2021.35    0.024   293.91
2021.45    0.024   291.82
2021.55    0.025   289.81
2021.65    0.025   287.89
2021.75    0.025   286.03
2021.85    0.026   284.24
2021.95    0.026   282.51
2022.05    0.027   280.82
2022.15    0.027   279.17
2022.25    0.027   277.55
2022.35    0.027   275.96
2022.45    0.027   274.38
2022.55    0.027   272.81
2022.65    0.027   271.24
2022.75    0.027   269.66
2022.85    0.027   268.06
2022.95    0.027   266.43
2023.05    0.026   264.74
2023.15    0.026   262.99
2023.25    0.025   261.15
2023.35    0.024   259.20
2023.45    0.023   257.09
2023.55    0.022   254.78
2023.65    0.021   252.21
2023.75    0.019   249.29
2023.85    0.018   245.89
2023.95    0.016   241.83
2024.05    0.015   236.84
2024.15    0.013   230.51
2024.25    0.011   222.21
2024.35    0.010   211.13
2024.45    0.008   196.50
2024.55    0.008   178.63
2024.65    0.008   159.90
2024.75    0.009   143.43
2024.85    0.010   130.58
2024.95    0.012   120.99
2025.05    0.014   113.79
2025.15    0.016   108.25
2025.25    0.017   103.86
2025.35    0.019   100.28
2025.45    0.021    97.28
2025.55    0.022    94.71
2025.65    0.024    92.46
2025.75    0.025    90.47
2025.85    0.026    88.66
2025.95    0.027    87.01
2026.05    0.028    85.49
2026.15    0.029    84.06
2026.25    0.030    82.72
2026.35    0.031    81.44
2026.45    0.031    80.21
2026.55    0.032    79.03
2026.65    0.032    77.89
2026.75    0.033    76.77
2026.85    0.033    75.67
2026.95    0.033    74.60
2027.05    0.033    73.53
2027.15    0.033    72.47
2027.25    0.034    71.42
2027.35    0.033    70.36
2027.45    0.033    69.30
2027.55    0.033    68.23
2027.65    0.033    67.16
2027.75    0.033    66.06
2027.85    0.033    64.96
2027.95    0.032    63.82
2028.05    0.032    62.67
2028.15    0.031    61.49
2028.25    0.031    60.27
2028.35    0.031    59.03
2028.45    0.030    57.74
2028.55    0.030    56.40
2028.65    0.029    55.02
2028.75    0.028    53.59
2028.85    0.028    52.10
2028.95    0.027    50.54
2029.05    0.027    48.92
2029.15    0.026    47.22
2029.25    0.025    45.43
2029.35    0.025    43.56
2029.45    0.024    41.59
2029.55    0.024    39.51
2029.65    0.023    37.32
2029.75    0.022    35.01
2029.85    0.022    32.57
2029.95    0.021    29.99
2030.05    0.021    27.27
2030.15    0.020    24.40
2030.25    0.020    21.37
2030.35    0.019    18.19
2030.45    0.019    14.86
2030.55    0.018    11.38
2030.65    0.018     7.75

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 18:38:29