Double Star Calculator - Orbit

Orbital Elements for STF2135AB
WDS: STF2135AB WDS ID/Discoverer
P: 2228.985 Orbital period (years)
a: 23.83872 Semi-major axis (arcseconds)
i: 80.053 Inclination (degrees)
Ω: 40.759 Longitude of ascending node (degrees)
T: 2283.747 Epoch of periastron passage (year)
e: 0.80812 Eccentricity
ω: 252.621 Longitude of periastron (degrees)
Start-Year: 910.5074500000001 Year
End-Year: 3139.49255 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2135AB
Position: 171206.06+211344.4 Epoch-2000 right ascension and declination
WDS-ID: 17121+2114 WDS designation
Discoverer Code: STF2135AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 7.59 Magnitude of the primary
V2: 8.88 Magnitude of the secondary
Equinox: Equinox
Date: 2015 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for STF2135AB



WDS 6th Orbit including measures of STF2135AB

-- 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 STF2135AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    8.752   195.39
--------------------------
910.51   18.770    61.00
920.51   18.638    61.27
930.51   18.503    61.54
940.51   18.366    61.81
950.51   18.226    62.09
960.51   18.085    62.38
970.51   17.941    62.66
980.51   17.795    62.96
990.51   17.647    63.25
1000.51   17.497    63.56
1010.51   17.344    63.86
1020.51   17.191    64.18
1030.51   17.035    64.50
1040.51   16.877    64.82
1050.51   16.718    65.15
1060.51   16.556    65.49
1070.51   16.394    65.83
1080.51   16.229    66.19
1090.51   16.063    66.54
1100.51   15.895    66.91
1110.51   15.726    67.28
1120.51   15.556    67.66
1130.51   15.384    68.05
1140.51   15.210    68.45
1150.51   15.036    68.86
1160.51   14.860    69.28
1170.51   14.683    69.71
1180.51   14.505    70.15
1190.51   14.326    70.60
1200.51   14.145    71.06
1210.51   13.964    71.53
1220.51   13.782    72.01
1230.51   13.599    72.51
1240.51   13.415    73.02
1250.51   13.231    73.55
1260.51   13.046    74.09
1270.51   12.860    74.65
1280.51   12.674    75.22
1290.51   12.487    75.81
1300.51   12.300    76.42
1310.51   12.113    77.05
1320.51   11.925    77.69
1330.51   11.738    78.36
1340.51   11.550    79.05
1350.51   11.363    79.76
1360.51   11.176    80.50
1370.51   10.989    81.26
1380.51   10.802    82.04
1390.51   10.616    82.86
1400.51   10.431    83.70
1410.51   10.246    84.57
1420.51   10.063    85.48
1430.51    9.880    86.42
1440.51    9.699    87.39
1450.51    9.519    88.41
1460.51    9.341    89.46
1470.51    9.165    90.55
1480.51    8.991    91.68
1490.51    8.819    92.86
1500.51    8.649    94.08
1510.51    8.482    95.36
1520.51    8.318    96.68
1530.51    8.157    98.06
1540.51    8.000    99.49
1550.51    7.847   100.97
1560.51    7.698   102.52
1570.51    7.553   104.13
1580.51    7.413   105.79
1590.51    7.278   107.53
1600.51    7.149   109.32
1610.51    7.026   111.18
1620.51    6.909   113.10
1630.51    6.798   115.09
1640.51    6.695   117.15
1650.51    6.600   119.26
1660.51    6.512   121.43
1670.51    6.433   123.66
1680.51    6.362   125.94
1690.51    6.300   128.28
1700.51    6.247   130.65
1710.51    6.204   133.06
1720.51    6.170   135.50
1730.51    6.147   137.96
1740.51    6.133   140.44
1750.51    6.129   142.93
1760.51    6.135   145.41
1770.51    6.151   147.88
1780.51    6.177   150.34
1790.51    6.212   152.78
1800.51    6.257   155.18
1810.51    6.310   157.55
1820.51    6.372   159.87
1830.51    6.443   162.14
1840.51    6.521   164.37
1850.51    6.607   166.54
1860.51    6.699   168.65
1870.51    6.798   170.70
1880.51    6.903   172.69
1890.51    7.013   174.62
1900.51    7.128   176.48
1910.51    7.247   178.29
1920.51    7.370   180.04
1930.51    7.496   181.73
1940.51    7.625   183.36
1950.51    7.755   184.94
1960.51    7.888   186.47
1970.51    8.021   187.95
1980.51    8.154   189.37
1990.51    8.287   190.76
2000.51    8.419   192.10
2010.51    8.549   193.39
2020.51    8.677   194.65
2030.51    8.801   195.87
2040.51    8.922   197.06
2050.51    9.038   198.22
2060.51    9.148   199.35
2070.51    9.250   200.45
2080.51    9.345   201.53
2090.51    9.430   202.59
2100.51    9.504   203.64
2110.51    9.565   204.66
2120.51    9.611   205.68
2130.51    9.639   206.69
2140.51    9.648   207.69
2150.51    9.632   208.69
2160.51    9.589   209.70
2170.51    9.513   210.73
2180.51    9.397   211.77
2190.51    9.233   212.85
2200.51    9.011   213.97
2210.51    8.717   215.16
2220.51    8.331   216.44
2230.51    7.830   217.87
2240.51    7.176   219.52
2250.51    6.325   221.57
2260.51    5.218   224.37
2270.51    3.805   229.02
2280.51    2.119   240.48
2290.51    0.806   309.90
2300.51    2.139    18.38
2310.51    3.892    29.54
2320.51    5.493    33.88
2330.51    6.911    36.33
2340.51    8.166    37.98
2350.51    9.280    39.21
2360.51   10.276    40.19
2370.51   11.174    41.00
2380.51   11.986    41.70
2390.51   12.726    42.31
2400.51   13.404    42.85
2410.51   14.026    43.35
2420.51   14.599    43.81
2430.51   15.128    44.23
2440.51   15.619    44.62
2450.51   16.074    45.00
2460.51   16.498    45.35
2470.51   16.892    45.68
2480.51   17.259    46.00
2490.51   17.602    46.31
2500.51   17.921    46.61
2510.51   18.220    46.89
2520.51   18.499    47.17
2530.51   18.759    47.44
2540.51   19.002    47.70
2550.51   19.229    47.96
2560.51   19.440    48.21
2570.51   19.637    48.45
2580.51   19.820    48.69
2590.51   19.991    48.93
2600.51   20.149    49.16
2610.51   20.295    49.39
2620.51   20.430    49.61
2630.51   20.554    49.83
2640.51   20.669    50.05
2650.51   20.773    50.27
2660.51   20.869    50.49
2670.51   20.955    50.70
2680.51   21.033    50.91
2690.51   21.102    51.12
2700.51   21.164    51.33
2710.51   21.218    51.54
2720.51   21.264    51.75
2730.51   21.303    51.95
2740.51   21.336    52.16
2750.51   21.362    52.36
2760.51   21.381    52.57
2770.51   21.395    52.77
2780.51   21.402    52.98
2790.51   21.403    53.18
2800.51   21.399    53.38
2810.51   21.389    53.59
2820.51   21.374    53.79
2830.51   21.354    54.00
2840.51   21.328    54.20
2850.51   21.298    54.41
2860.51   21.263    54.61
2870.51   21.224    54.82
2880.51   21.180    55.03
2890.51   21.131    55.24
2900.51   21.078    55.45
2910.51   21.021    55.66
2920.51   20.960    55.87
2930.51   20.895    56.08
2940.51   20.826    56.30
2950.51   20.754    56.51
2960.51   20.677    56.73
2970.51   20.597    56.95
2980.51   20.514    57.17
2990.51   20.427    57.39
3000.51   20.336    57.62
3010.51   20.243    57.84
3020.51   20.146    58.07
3030.51   20.046    58.30
3040.51   19.943    58.54
3050.51   19.837    58.77
3060.51   19.728    59.01
3070.51   19.616    59.25
3080.51   19.501    59.50
3090.51   19.384    59.75
3100.51   19.264    60.00
3110.51   19.141    60.25
3120.51   19.015    60.51
3130.51   18.887    60.77






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 17:34:46



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