Double Star Calculator - Orbit

Orbital Elements for SIG1

WDS:	SIG1	WDS ID/Discoverer
P:	14.820	Orbital period (years)
a:	0.0965	Semi-major axis (arcseconds)
i:	62.4	Inclination (degrees)
Ω:	82.1	Longitude of ascending node (degrees)
T:	2020.085	Epoch of periastron passage (year)
e:	0.706	Eccentricity
ω:	168.0	Longitude of periastron (degrees)
Start-Year:	2017.59	Year
End-Year:	2032.41	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for SIG1
Position:	042149.56+192908.6	Epoch-2000 right ascension and declination
WDS-ID:	04218+1929	WDS designation
Discoverer Code:	SIG1	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	13.1	Magnitude of the primary
V2:	13.9	Magnitude of the secondary
Equinox:		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:	Dup2017	Reference

Double Star Orbit for SIG1

WDS 6th Orbit including measures of SIG1

-- 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 SIG1

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.156    73.57
--------------------------
2017.59    0.100    94.92
2017.69    0.097    95.68
2017.79    0.094    96.50
2017.89    0.090    97.38
2017.99    0.086    98.34
2018.09    0.083    99.37
2018.19    0.079   100.51
2018.29    0.075   101.76
2018.39    0.071   103.16
2018.49    0.067   104.73
2018.59    0.062   106.51
2018.69    0.058   108.57
2018.79    0.053   110.99
2018.89    0.048   113.87
2018.99    0.044   117.37
2019.09    0.039   121.76
2019.19    0.034   127.41
2019.29    0.029   134.92
2019.39    0.025   145.18
2019.49    0.021   159.31
2019.59    0.019   177.81
2019.69    0.019   198.85
2019.79    0.020   218.47
2019.89    0.023   234.33
2019.99    0.026   246.74
2020.09    0.028   256.93
2020.19    0.029   266.06
2020.29    0.029   274.97
2020.39    0.028   284.33
2020.49    0.026   294.58
2020.59    0.025   305.94
2020.69    0.024   318.27
2020.79    0.024   331.00
2020.89    0.025   343.30
2020.99    0.027   354.44
2021.09    0.029     4.06
2021.19    0.032    12.12
2021.29    0.035    18.82
2021.39    0.038    24.38
2021.49    0.042    29.03
2021.59    0.045    32.95
2021.69    0.049    36.29
2021.79    0.053    39.18
2021.89    0.056    41.69
2021.99    0.060    43.90
2022.09    0.063    45.87
2022.19    0.067    47.62
2022.29    0.070    49.21
2022.39    0.074    50.65
2022.49    0.077    51.96
2022.59    0.080    53.17
2022.69    0.083    54.28
2022.79    0.086    55.32
2022.89    0.089    56.28
2022.99    0.092    57.18
2023.09    0.095    58.03
2023.19    0.098    58.82
2023.29    0.101    59.57
2023.39    0.103    60.29
2023.49    0.106    60.96
2023.59    0.109    61.61
2023.69    0.111    62.22
2023.79    0.114    62.81
2023.89    0.116    63.38
2023.99    0.118    63.92
2024.09    0.120    64.44
2024.19    0.123    64.94
2024.29    0.125    65.43
2024.39    0.127    65.90
2024.49    0.129    66.35
2024.59    0.131    66.80
2024.69    0.132    67.22
2024.79    0.134    67.64
2024.89    0.136    68.05
2024.99    0.138    68.44
2025.09    0.139    68.83
2025.19    0.141    69.21
2025.29    0.142    69.58
2025.39    0.144    69.94
2025.49    0.145    70.29
2025.59    0.147    70.64
2025.69    0.148    70.98
2025.79    0.149    71.32
2025.89    0.150    71.65
2025.99    0.151    71.98
2026.09    0.153    72.30
2026.19    0.154    72.62
2026.29    0.155    72.93
2026.39    0.155    73.24
2026.49    0.156    73.54
2026.59    0.157    73.84
2026.69    0.158    74.14
2026.79    0.159    74.44
2026.89    0.159    74.74
2026.99    0.160    75.03
2027.09    0.160    75.32
2027.19    0.161    75.61
2027.29    0.161    75.89
2027.39    0.161    76.18
2027.49    0.162    76.46
2027.59    0.162    76.74
2027.69    0.162    77.03
2027.79    0.162    77.31
2027.89    0.162    77.59
2027.99    0.163    77.87
2028.09    0.162    78.15
2028.19    0.162    78.43
2028.29    0.162    78.71
2028.39    0.162    79.00
2028.49    0.162    79.28
2028.59    0.162    79.56
2028.69    0.161    79.85
2028.79    0.161    80.14
2028.89    0.160    80.42
2028.99    0.160    80.71
2029.09    0.159    81.01
2029.19    0.158    81.30
2029.29    0.158    81.60
2029.39    0.157    81.90
2029.49    0.156    82.20
2029.59    0.155    82.51
2029.69    0.154    82.82
2029.79    0.153    83.13
2029.89    0.152    83.45
2029.99    0.151    83.77
2030.09    0.150    84.10
2030.19    0.149    84.43
2030.29    0.147    84.77
2030.39    0.146    85.12
2030.49    0.144    85.47
2030.59    0.143    85.83
2030.69    0.141    86.20
2030.79    0.139    86.58
2030.89    0.138    86.96
2030.99    0.136    87.36
2031.09    0.134    87.77
2031.19    0.132    88.19
2031.29    0.130    88.63
2031.39    0.127    89.08
2031.49    0.125    89.54
2031.59    0.123    90.02
2031.69    0.120    90.52
2031.79    0.118    91.05
2031.89    0.115    91.59
2031.99    0.113    92.16
2032.09    0.110    92.76
2032.19    0.107    93.40
2032.29    0.104    94.06
2032.39    0.101    94.77

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 15:21:55