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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:32:26

Orbital Elements for STF2881
WDS: STF2881 WDS ID/Discoverer
P: 1345.330 Orbital period (years)
a: 4.07325 Semi-major axis (arcseconds)
i: 100.17 Inclination (degrees)
Ω: 121.211 Longitude of ascending node (degrees)
T: 1764.507 Epoch of periastron passage (year)
e: 0.82377 Eccentricity
ω: 285.332 Longitude of periastron (degrees)
Start-Year: 1353.0 Year
End-Year: 2697.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2881
Position: 221434.67+293420.6 Epoch-2000 right ascension and declination
WDS-ID: 22146+2934 WDS designation
Discoverer Code: STF2881 Discover designation and components
ADS number: 15769 Aitken Double Star catalog
HD number: 211139 HD catalog number
Hipparcos number: 109815 Hipparcos catalog number
V1: 7.65 Magnitude of the primary
V2: 8.24 Magnitude of the secondary
Equinox: Equinox
Date: 2015 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for STF2881



WDS 6th Orbit including measures of STF2881

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


Ephemeris of STF2881
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     1.197     69.3
-------------------------
1353.0     3.305    319.5
1363.0     3.328    319.1
1373.0     3.349    318.7
1383.0     3.368    318.3
1393.0     3.385    317.9
1403.0     3.401    317.5
1413.0     3.415    317.1
1423.0     3.427    316.7
1433.0     3.437    316.4
1443.0     3.445    316.0
1453.0     3.450    315.6
1463.0     3.454    315.2
1473.0     3.454    314.9
1483.0     3.453    314.5
1493.0     3.448    314.1
1503.0     3.441    313.7
1513.0     3.430    313.4
1523.0     3.417    313.0
1533.0     3.399    312.6
1543.0     3.378    312.2
1553.0     3.354    311.8
1563.0     3.324    311.4
1573.0     3.290    311.0
1583.0     3.252    310.6
1593.0     3.207    310.2
1603.0     3.157    309.7
1613.0     3.100    309.3
1623.0     3.036    308.8
1633.0     2.964    308.3
1643.0     2.882    307.8
1653.0     2.790    307.3
1663.0     2.687    306.7
1673.0     2.569    306.0
1683.0     2.435    305.3
1693.0     2.282    304.5
1703.0     2.104    303.6
1713.0     1.896    302.5
1723.0     1.649    301.1
1733.0     1.348    299.1
1743.0     0.972    295.7
1753.0     0.500    286.8
1763.0     0.161    172.7
1773.0     0.650    128.5
1783.0     1.019    122.0
1793.0     1.254    118.6
1803.0     1.404    116.1
1813.0     1.502    114.0
1823.0     1.565    112.1
1833.0     1.604    110.3
1843.0     1.625    108.6
1853.0     1.633    107.0
1863.0     1.632    105.3
1873.0     1.622    103.6
1883.0     1.607    101.9
1893.0     1.587    100.2
1903.0     1.563     98.4
1913.0     1.536     96.5
1923.0     1.507     94.6
1933.0     1.476     92.6
1943.0     1.444     90.5
1953.0     1.412     88.4
1963.0     1.379     86.1
1973.0     1.347     83.7
1983.0     1.315     81.2
1993.0     1.285     78.5
2003.0     1.256     75.8
2013.0     1.228     72.9
2023.0     1.202     69.9
2033.0     1.179     66.8
2043.0     1.158     63.5
2053.0     1.141     60.1
2063.0     1.126     56.7
2073.0     1.115     53.1
2083.0     1.107     49.5
2093.0     1.103     45.9
2103.0     1.102     42.2
2113.0     1.106     38.6
2123.0     1.113     35.0
2133.0     1.124     31.4
2143.0     1.138     27.9
2153.0     1.156     24.6
2163.0     1.177     21.3
2173.0     1.202     18.1
2183.0     1.229     15.1
2193.0     1.259     12.3
2203.0     1.291      9.5
2213.0     1.325      6.9
2223.0     1.362      4.5
2233.0     1.400      2.1
2243.0     1.439    359.9
2253.0     1.481    357.8
2263.0     1.523    355.9
2273.0     1.566    354.0
2283.0     1.611    352.2
2293.0     1.656    350.6
2303.0     1.702    349.0
2313.0     1.748    347.5
2323.0     1.795    346.1
2333.0     1.842    344.7
2343.0     1.890    343.5
2353.0     1.937    342.3
2363.0     1.985    341.1
2373.0     2.033    340.0
2383.0     2.081    338.9
2393.0     2.128    337.9
2403.0     2.176    337.0
2413.0     2.223    336.1
2423.0     2.270    335.2
2433.0     2.317    334.3
2443.0     2.363    333.5
2453.0     2.409    332.7
2463.0     2.455    332.0
2473.0     2.500    331.3
2483.0     2.545    330.6
2493.0     2.589    329.9
2503.0     2.632    329.2
2513.0     2.675    328.6
2523.0     2.717    328.0
2533.0     2.758    327.4
2543.0     2.799    326.8
2553.0     2.839    326.3
2563.0     2.878    325.7
2573.0     2.916    325.2
2583.0     2.954    324.7
2593.0     2.990    324.2
2603.0     3.025    323.7
2613.0     3.060    323.2
2623.0     3.093    322.7
2633.0     3.125    322.3
2643.0     3.156    321.8
2653.0     3.186    321.4
2663.0     3.215    321.0
2673.0     3.242    320.5
2683.0     3.268    320.1
2693.0     3.293    319.7






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 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.


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