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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:04:40

Orbital Elements for STF1534

WDS:	STF1534	WDS ID/Discoverer
P:	1676.179	Orbital period (years)
a:	9.61813	Semi-major axis (arcseconds)
i:	105.502	Inclination (degrees)
Ω:	170.983	Longitude of ascending node (degrees)
T:	1717.618	Epoch of periastron passage (year)
e:	0.82209	Eccentricity
ω:	95.699	Longitude of periastron (degrees)
Start-Year:	1187.0	Year
End-Year:	2863.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1534

Position:	112149.34+181124.0	Epoch-2000 right ascension and declination
WDS-ID:	11218+1811	WDS designation
Discoverer Code:	STF1534	Discover designation and components
ADS number:	8140	Aitken Double Star catalog
HD number:	98736B	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.08	Magnitude of the primary
V2:	11.14	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 STF1534

WDS 6th Orbit including measures of STF1534

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

Ephemeris of STF1534

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     5.073    313.0
-------------------------
1187.0     6.320    210.8
1197.0     6.360    210.0
1207.0     6.400    209.3
1217.0     6.439    208.6
1227.0     6.476    207.8
1237.0     6.513    207.1
1247.0     6.548    206.4
1257.0     6.581    205.7
1267.0     6.614    205.0
1277.0     6.644    204.3
1287.0     6.674    203.6
1297.0     6.701    203.0
1307.0     6.727    202.3
1317.0     6.750    201.6
1327.0     6.772    201.0
1337.0     6.791    200.3
1347.0     6.808    199.7
1357.0     6.822    199.0
1367.0     6.834    198.4
1377.0     6.843    197.7
1387.0     6.849    197.1
1397.0     6.851    196.4
1407.0     6.851    195.8
1417.0     6.847    195.1
1427.0     6.839    194.5
1437.0     6.826    193.8
1447.0     6.810    193.2
1457.0     6.788    192.5
1467.0     6.762    191.9
1477.0     6.730    191.2
1487.0     6.693    190.5
1497.0     6.649    189.9
1507.0     6.598    189.2
1517.0     6.540    188.5
1527.0     6.474    187.8
1537.0     6.398    187.0
1547.0     6.313    186.3
1557.0     6.217    185.5
1567.0     6.109    184.7
1577.0     5.988    183.9
1587.0     5.851    183.0
1597.0     5.698    182.1
1607.0     5.524    181.2
1617.0     5.327    180.1
1627.0     5.103    179.0
1637.0     4.847    177.8
1647.0     4.552    176.4
1657.0     4.209    174.9
1667.0     3.804    173.0
1677.0     3.319    170.6
1687.0     2.728    167.3
1697.0     1.995    161.8
1707.0     1.106    148.3
1717.0     0.467     68.8
1727.0     1.252      8.7
1737.0     2.087    357.3
1747.0     2.731    352.1
1757.0     3.222    348.7
1767.0     3.603    346.1
1777.0     3.905    343.9
1787.0     4.149    342.1
1797.0     4.348    340.4
1807.0     4.512    338.8
1817.0     4.647    337.4
1827.0     4.760    336.0
1837.0     4.854    334.7
1847.0     4.931    333.5
1857.0     4.995    332.2
1867.0     5.047    331.0
1877.0     5.088    329.9
1887.0     5.121    328.7
1897.0     5.147    327.6
1907.0     5.165    326.4
1917.0     5.177    325.3
1927.0     5.184    324.2
1937.0     5.187    323.0
1947.0     5.185    321.9
1957.0     5.179    320.8
1967.0     5.171    319.7
1977.0     5.159    318.5
1987.0     5.145    317.4
1997.0     5.128    316.2
2007.0     5.110    315.1
2017.0     5.090    313.9
2027.0     5.069    312.8
2037.0     5.047    311.6
2047.0     5.023    310.4
2057.0     4.999    309.2
2067.0     4.974    308.0
2077.0     4.949    306.7
2087.0     4.923    305.5
2097.0     4.897    304.2
2107.0     4.872    303.0
2117.0     4.846    301.7
2127.0     4.821    300.4
2137.0     4.796    299.1
2147.0     4.772    297.8
2157.0     4.748    296.4
2167.0     4.725    295.1
2177.0     4.703    293.7
2187.0     4.682    292.3
2197.0     4.662    291.0
2207.0     4.643    289.6
2217.0     4.625    288.2
2227.0     4.608    286.7
2237.0     4.593    285.3
2247.0     4.579    283.9
2257.0     4.567    282.4
2267.0     4.556    281.0
2277.0     4.547    279.5
2287.0     4.539    278.0
2297.0     4.533    276.6
2307.0     4.529    275.1
2317.0     4.527    273.6
2327.0     4.526    272.2
2337.0     4.527    270.7
2347.0     4.530    269.2
2357.0     4.535    267.7
2367.0     4.541    266.3
2377.0     4.549    264.8
2387.0     4.559    263.3
2397.0     4.571    261.9
2407.0     4.585    260.4
2417.0     4.600    259.0
2427.0     4.617    257.6
2437.0     4.636    256.2
2447.0     4.656    254.8
2457.0     4.678    253.4
2467.0     4.702    252.0
2477.0     4.727    250.7
2487.0     4.754    249.3
2497.0     4.782    248.0
2507.0     4.812    246.7
2517.0     4.843    245.4
2527.0     4.875    244.1
2537.0     4.909    242.8
2547.0     4.944    241.6
2557.0     4.980    240.4
2567.0     5.017    239.1
2577.0     5.055    237.9
2587.0     5.094    236.8
2597.0     5.134    235.6
2607.0     5.175    234.5
2617.0     5.217    233.4
2627.0     5.259    232.3
2637.0     5.302    231.2
2647.0     5.346    230.1
2657.0     5.390    229.1
2667.0     5.435    228.0
2677.0     5.480    227.0
2687.0     5.526    226.0
2697.0     5.572    225.0
2707.0     5.618    224.1
2717.0     5.664    223.1
2727.0     5.710    222.2
2737.0     5.757    221.3
2747.0     5.803    220.4
2757.0     5.849    219.5
2767.0     5.896    218.6
2777.0     5.942    217.7
2787.0     5.987    216.9
2797.0     6.033    216.0
2807.0     6.078    215.2
2817.0     6.122    214.4
2827.0     6.166    213.6
2837.0     6.210    212.8
2847.0     6.252    212.0
2857.0     6.294    211.3

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.