Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:12:31

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:	1196.0	Year
End-Year:	2854.0	Year
Epoch:	2025.0	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' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for STF648AB

WDS 6th Orbit including measures of STF648AB

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)

Ephemeris of STF648AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     4.595     60.6
-------------------------
1196.0     3.494    170.8
1206.0     3.455    169.3
1216.0     3.418    167.8
1226.0     3.383    166.2
1236.0     3.348    164.6
1246.0     3.316    163.0
1256.0     3.285    161.4
1266.0     3.256    159.7
1276.0     3.229    158.0
1286.0     3.204    156.3
1296.0     3.181    154.5
1306.0     3.160    152.7
1316.0     3.142    150.9
1326.0     3.126    149.1
1336.0     3.112    147.3
1346.0     3.100    145.4
1356.0     3.091    143.5
1366.0     3.085    141.6
1376.0     3.080    139.8
1386.0     3.079    137.9
1396.0     3.080    136.0
1406.0     3.083    134.1
1416.0     3.089    132.2
1426.0     3.098    130.4
1436.0     3.108    128.5
1446.0     3.122    126.6
1456.0     3.137    124.8
1466.0     3.155    123.0
1476.0     3.175    121.2
1486.0     3.198    119.5
1496.0     3.222    117.7
1506.0     3.248    116.0
1516.0     3.276    114.3
1526.0     3.307    112.7
1536.0     3.338    111.1
1546.0     3.372    109.5
1556.0     3.407    107.9
1566.0     3.443    106.4
1576.0     3.481    104.9
1586.0     3.520    103.4
1596.0     3.560    102.0
1606.0     3.601    100.6
1616.0     3.643     99.2
1626.0     3.686     97.9
1636.0     3.729     96.6
1646.0     3.774     95.3
1656.0     3.818     94.1
1666.0     3.863     92.9
1676.0     3.908     91.7
1686.0     3.954     90.5
1696.0     3.999     89.4
1706.0     4.045     88.3
1716.0     4.090     87.2
1726.0     4.135     86.1
1736.0     4.180     85.1
1746.0     4.224     84.1
1756.0     4.268     83.1
1766.0     4.311     82.1
1776.0     4.353     81.2
1786.0     4.394     80.2
1796.0     4.434     79.3
1806.0     4.473     78.4
1816.0     4.510     77.5
1826.0     4.546     76.6
1836.0     4.580     75.8
1846.0     4.612     74.9
1856.0     4.642     74.1
1866.0     4.670     73.3
1876.0     4.696     72.5
1886.0     4.719     71.7
1896.0     4.739     70.9
1906.0     4.756     70.1
1916.0     4.770     69.3
1926.0     4.780     68.5
1936.0     4.787     67.7
1946.0     4.788     66.9
1956.0     4.785     66.1
1966.0     4.777     65.4
1976.0     4.764     64.6
1986.0     4.744     63.8
1996.0     4.717     63.0
2006.0     4.683     62.2
2016.0     4.641     61.3
2026.0     4.589     60.5
2036.0     4.527     59.6
2046.0     4.453     58.8
2056.0     4.367     57.8
2066.0     4.265     56.9
2076.0     4.147     55.9
2086.0     4.009     54.8
2096.0     3.848     53.6
2106.0     3.660     52.4
2116.0     3.441     50.9
2126.0     3.184     49.3
2136.0     2.881     47.4
2146.0     2.524     44.9
2156.0     2.102     41.6
2166.0     1.610     36.3
2176.0     1.058     25.8
2186.0     0.543    353.4
2196.0     0.586    278.1
2206.0     1.119    250.0
2216.0     1.669    240.5
2226.0     2.158    235.6
2236.0     2.578    232.4
2246.0     2.937    230.0
2256.0     3.243    228.1
2266.0     3.506    226.6
2276.0     3.731    225.2
2286.0     3.926    224.0
2296.0     4.094    222.9
2306.0     4.240    221.8
2316.0     4.366    220.9
2326.0     4.475    219.9
2336.0     4.570    219.1
2346.0     4.651    218.2
2356.0     4.721    217.4
2366.0     4.780    216.6
2376.0     4.830    215.8
2386.0     4.871    215.1
2396.0     4.905    214.3
2406.0     4.932    213.6
2416.0     4.952    212.9
2426.0     4.967    212.1
2436.0     4.976    211.4
2446.0     4.980    210.7
2456.0     4.979    210.0
2466.0     4.975    209.2
2476.0     4.966    208.5
2486.0     4.954    207.8
2496.0     4.938    207.1
2506.0     4.920    206.3
2516.0     4.898    205.6
2526.0     4.874    204.8
2536.0     4.848    204.1
2546.0     4.819    203.3
2556.0     4.788    202.5
2566.0     4.755    201.7
2576.0     4.720    200.9
2586.0     4.684    200.1
2596.0     4.646    199.3
2606.0     4.607    198.5
2616.0     4.566    197.6
2626.0     4.524    196.8
2636.0     4.482    195.9
2646.0     4.438    195.0
2656.0     4.393    194.1
2666.0     4.348    193.1
2676.0     4.302    192.2
2686.0     4.256    191.2
2696.0     4.209    190.2
2706.0     4.163    189.2
2716.0     4.115    188.1
2726.0     4.068    187.0
2736.0     4.021    185.9
2746.0     3.974    184.8
2756.0     3.927    183.7
2766.0     3.880    182.5
2776.0     3.834    181.3
2786.0     3.788    180.1
2796.0     3.743    178.8
2806.0     3.698    177.5
2816.0     3.654    176.2
2826.0     3.611    174.8
2836.0     3.569    173.4
2846.0     3.529    172.0

Disclaimer

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.