Double Star Calculator - Orbit

Orbital Elements for STF648AB

WDS:	STF648AB	WDS ID/Discoverer
P:	1658.704	Orbital period (years)
a:	7.00107	Semi-major axis (arcseconds)
i:	104.608	Inclination (degrees)
Ω:	48.63	Longitude of ascending node (degrees)
T:	2190.021	Epoch of periastron passage (year)
e:	0.74472	Eccentricity
ω:	88.984	Longitude of periastron (degrees)
Start-Year:	1195.64805	Year
End-Year:	2854.35195	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF648AB
Position:	051059.19+320219.5	Epoch-2000 right ascension and declination
WDS-ID:	05110+3203	WDS designation
Discoverer Code:	STF648AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	33334	HD catalog number
Hipparcos number:	24133	Hipparcos catalog number
V1:	8.14	Magnitude of the primary
V2:	8.93	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 STF648AB

WDS 6th Orbit including measures of STF648AB

-- 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 STF648AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    4.586    60.46
--------------------------
1195.65    3.495   170.81
1205.65    3.457   169.32
1215.65    3.420   167.81
1225.65    3.384   166.26
1235.65    3.350   164.68
1245.65    3.317   163.07
1255.65    3.286   161.43
1265.65    3.257   159.75
1275.65    3.230   158.05
1285.65    3.205   156.32
1295.65    3.182   154.56
1305.65    3.161   152.78
1315.65    3.142   150.98
1325.65    3.126   149.16
1335.65    3.112   147.32
1345.65    3.101   145.46
1355.65    3.091   143.59
1365.65    3.085   141.72
1375.65    3.081   139.83
1385.65    3.079   137.94
1395.65    3.080   136.06
1405.65    3.083   134.17
1415.65    3.089   132.29
1425.65    3.097   130.42
1435.65    3.108   128.56
1445.65    3.121   126.71
1455.65    3.137   124.88
1465.65    3.154   123.07
1475.65    3.175   121.28
1485.65    3.197   119.52
1495.65    3.221   117.78
1505.65    3.247   116.07
1515.65    3.275   114.38
1525.65    3.305   112.73
1535.65    3.337   111.11
1545.65    3.371   109.51
1555.65    3.405   107.95
1565.65    3.442   106.43
1575.65    3.480   104.93
1585.65    3.518   103.47
1595.65    3.559   102.04
1605.65    3.600   100.64
1615.65    3.642    99.27
1625.65    3.684    97.94
1635.65    3.728    96.64
1645.65    3.772    95.36
1655.65    3.817    94.12
1665.65    3.862    92.90
1675.65    3.907    91.72
1685.65    3.952    90.56
1695.65    3.998    89.42
1705.65    4.043    88.32
1715.65    4.089    87.23
1725.65    4.134    86.17
1735.65    4.178    85.14
1745.65    4.223    84.12
1755.65    4.266    83.13
1765.65    4.309    82.16
1775.65    4.351    81.20
1785.65    4.392    80.26
1795.65    4.432    79.34
1805.65    4.471    78.44
1815.65    4.509    77.55
1825.65    4.544    76.68
1835.65    4.579    75.82
1845.65    4.611    74.97
1855.65    4.641    74.13
1865.65    4.670    73.31
1875.65    4.695    72.49
1885.65    4.718    71.68
1895.65    4.739    70.88
1905.65    4.756    70.09
1915.65    4.770    69.30
1925.65    4.780    68.51
1935.65    4.786    67.73
1945.65    4.788    66.95
1955.65    4.786    66.17
1965.65    4.778    65.39
1975.65    4.764    64.60
1985.65    4.745    63.81
1995.65    4.718    63.01
2005.65    4.684    62.20
2015.65    4.642    61.37
2025.65    4.591    60.53
2035.65    4.529    59.67
2045.65    4.456    58.79
2055.65    4.370    57.87
2065.65    4.269    56.91
2075.65    4.151    55.90
2085.65    4.014    54.83
2095.65    3.854    53.67
2105.65    3.667    52.40
2115.65    3.449    50.99
2125.65    3.194    49.37
2135.65    2.893    47.44
2145.65    2.538    45.01
2155.65    2.118    41.69
2165.65    1.629    36.53
2175.65    1.078    26.39
2185.65    0.557   355.46
2195.65    0.572   279.97
2205.65    1.099   250.55
2215.65    1.650   240.73
2225.65    2.142   235.70
2235.65    2.565   232.45
2245.65    2.925   230.07
2255.65    3.233   228.19
2265.65    3.497   226.61
2275.65    3.724   225.23
2285.65    3.919   224.01
2295.65    4.088   222.89
2305.65    4.235   221.86
2315.65    4.362   220.89
2325.65    4.472   219.97
2335.65    4.567   219.10
2345.65    4.649   218.25
2355.65    4.719   217.44
2365.65    4.778   216.64
2375.65    4.829   215.87
2385.65    4.870   215.11
2395.65    4.904   214.36
2405.65    4.931   213.62
2415.65    4.952   212.88
2425.65    4.966   212.15
2435.65    4.975   211.43
2445.65    4.980   210.71
2455.65    4.979   209.99
2465.65    4.975   209.26
2475.65    4.966   208.54
2485.65    4.954   207.81
2495.65    4.939   207.08
2505.65    4.921   206.34
2515.65    4.899   205.60
2525.65    4.875   204.85
2535.65    4.849   204.09
2545.65    4.820   203.33
2555.65    4.789   202.55
2565.65    4.756   201.76
2575.65    4.721   200.97
2585.65    4.685   200.16
2595.65    4.647   199.34
2605.65    4.608   198.50
2615.65    4.567   197.65
2625.65    4.526   196.78
2635.65    4.483   195.90
2645.65    4.439   195.00
2655.65    4.395   194.08
2665.65    4.350   193.15
2675.65    4.304   192.19
2685.65    4.258   191.21
2695.65    4.211   190.21
2705.65    4.164   189.19
2715.65    4.117   188.15
2725.65    4.070   187.08
2735.65    4.022   185.99
2745.65    3.975   184.87
2755.65    3.928   183.72
2765.65    3.882   182.55
2775.65    3.835   181.34
2785.65    3.789   180.11
2795.65    3.744   178.85
2805.65    3.700   177.56
2815.65    3.656   176.23
2825.65    3.613   174.88
2835.65    3.571   173.49
2845.65    3.530   172.07

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 15:34:51