Double Star Calculator - Orbit

Orbital Elements for STF1944

WDS:	STF1944	WDS ID/Discoverer
P:	1030.000	Orbital period (years)
a:	1.131	Semi-major axis (arcseconds)
i:	126.6	Inclination (degrees)
Ω:	142.6	Longitude of ascending node (degrees)
T:	2089.300	Epoch of periastron passage (year)
e:	0.5	Eccentricity
ω:	294.8	Longitude of periastron (degrees)
Start-Year:	1510.0	Year
End-Year:	2540.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1944
Position:	152742.14+060604.5	Epoch-2000 right ascension and declination
WDS-ID:	15277+0606	WDS designation
Discoverer Code:	STF1944	Discover designation and components
ADS number:	9647	Aitken Double Star catalog
HD number:	137761	HD catalog number
Hipparcos number:	75682	Hipparcos catalog number
V1:	8.32	Magnitude of the primary
V2:	8.79	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2010	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Zir2015a	Reference

Double Star Orbit for STF1944

WDS 6th Orbit including measures of STF1944

-- 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 STF1944

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.556   287.66
--------------------------
1510.00    1.067    26.79
1520.00    1.082    24.79
1530.00    1.097    22.85
1540.00    1.112    20.95
1550.00    1.126    19.11
1560.00    1.141    17.32
1570.00    1.156    15.56
1580.00    1.170    13.86
1590.00    1.184    12.19
1600.00    1.197    10.56
1610.00    1.211     8.97
1620.00    1.224     7.41
1630.00    1.236     5.88
1640.00    1.248     4.39
1650.00    1.259     2.92
1660.00    1.269     1.47
1670.00    1.279     0.05
1680.00    1.288   358.65
1690.00    1.297   357.27
1700.00    1.304   355.90
1710.00    1.311   354.55
1720.00    1.316   353.22
1730.00    1.321   351.89
1740.00    1.324   350.57
1750.00    1.327   349.26
1760.00    1.328   347.95
1770.00    1.328   346.64
1780.00    1.326   345.33
1790.00    1.323   344.01
1800.00    1.319   342.69
1810.00    1.312   341.35
1820.00    1.305   340.01
1830.00    1.295   338.64
1840.00    1.283   337.25
1850.00    1.270   335.84
1860.00    1.254   334.39
1870.00    1.236   332.90
1880.00    1.216   331.36
1890.00    1.193   329.77
1900.00    1.168   328.12
1910.00    1.139   326.38
1920.00    1.108   324.55
1930.00    1.074   322.62
1940.00    1.036   320.54
1950.00    0.994   318.30
1960.00    0.949   315.86
1970.00    0.900   313.16
1980.00    0.847   310.13
1990.00    0.791   306.69
2000.00    0.730   302.69
2010.00    0.666   297.95
2020.00    0.599   292.17
2030.00    0.532   284.93
2040.00    0.467   275.62
2050.00    0.409   263.49
2060.00    0.366   247.94
2070.00    0.347   229.50
2080.00    0.356   210.53
2090.00    0.390   193.76
2100.00    0.440   180.27
2110.00    0.497   169.71
2120.00    0.554   161.32
2130.00    0.606   154.45
2140.00    0.653   148.63
2150.00    0.694   143.55
2160.00    0.728   138.99
2170.00    0.757   134.80
2180.00    0.780   130.89
2190.00    0.799   127.19
2200.00    0.814   123.64
2210.00    0.825   120.21
2220.00    0.834   116.86
2230.00    0.841   113.57
2240.00    0.846   110.32
2250.00    0.850   107.11
2260.00    0.853   103.93
2270.00    0.855   100.76
2280.00    0.856    97.61
2290.00    0.858    94.46
2300.00    0.859    91.33
2310.00    0.860    88.20
2320.00    0.862    85.09
2330.00    0.865    81.99
2340.00    0.867    78.91
2350.00    0.871    75.86
2360.00    0.875    72.83
2370.00    0.880    69.83
2380.00    0.885    66.86
2390.00    0.892    63.94
2400.00    0.899    61.06
2410.00    0.907    58.23
2420.00    0.916    55.45
2430.00    0.926    52.73
2440.00    0.936    50.07
2450.00    0.947    47.46
2460.00    0.958    44.92
2470.00    0.971    42.43
2480.00    0.983    40.01
2490.00    0.996    37.66
2500.00    1.010    35.36
2510.00    1.024    33.13
2520.00    1.038    30.96
2530.00    1.053    28.85

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 17:15:39