Double Star Calculator - Orbit

Orbital Elements for STT437AB

WDS:	STT437AB	WDS ID/Discoverer
P:	1218.096	Orbital period (years)
a:	3.65733	Semi-major axis (arcseconds)
i:	103.165	Inclination (degrees)
Ω:	7.623	Longitude of ascending node (degrees)
T:	2180.047	Epoch of periastron passage (year)
e:	0.50075	Eccentricity
ω:	65.074	Longitude of periastron (degrees)
Start-Year:	1415.9519	Year
End-Year:	2634.0481	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT437AB
Position:	212050.12+322710.2	Epoch-2000 right ascension and declination
WDS-ID:	21208+3227	WDS designation
Discoverer Code:	STT437AB	Discover designation and components
ADS number:	14889	Aitken Double Star catalog
HD number:	203358	HD catalog number
Hipparcos number:	105390	Hipparcos catalog number
V1:	7.15	Magnitude of the primary
V2:	7.42	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	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:	Izm2019	Reference

Double Star Orbit for STT437AB

WDS 6th Orbit including measures of STT437AB

-- 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 STT437AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    2.467    18.01
--------------------------
1415.95    3.677   173.95
1425.95    3.622   173.37
1435.95    3.565   172.77
1445.95    3.505   172.14
1455.95    3.443   171.50
1465.95    3.378   170.83
1475.95    3.310   170.13
1485.95    3.241   169.40
1495.95    3.169   168.64
1505.95    3.095   167.85
1515.95    3.020   167.02
1525.95    2.942   166.14
1535.95    2.864   165.21
1545.95    2.783   164.24
1555.95    2.701   163.20
1565.95    2.618   162.10
1575.95    2.534   160.92
1585.95    2.449   159.67
1595.95    2.364   158.32
1605.95    2.278   156.87
1615.95    2.192   155.31
1625.95    2.106   153.63
1635.95    2.020   151.79
1645.95    1.934   149.80
1655.95    1.850   147.62
1665.95    1.767   145.23
1675.95    1.686   142.62
1685.95    1.608   139.74
1695.95    1.532   136.58
1705.95    1.460   133.09
1715.95    1.393   129.26
1725.95    1.332   125.06
1735.95    1.277   120.47
1745.95    1.230   115.51
1755.95    1.192   110.19
1765.95    1.163   104.56
1775.95    1.145    98.70
1785.95    1.138    92.71
1795.95    1.143    86.71
1805.95    1.158    80.82
1815.95    1.185    75.13
1825.95    1.220    69.73
1835.95    1.265    64.68
1845.95    1.317    60.00
1855.95    1.376    55.69
1865.95    1.440    51.76
1875.95    1.508    48.16
1885.95    1.579    44.89
1895.95    1.652    41.90
1905.95    1.727    39.17
1915.95    1.802    36.66
1925.95    1.878    34.36
1935.95    1.952    32.23
1945.95    2.025    30.26
1955.95    2.096    28.43
1965.95    2.164    26.71
1975.95    2.228    25.09
1985.95    2.288    23.57
1995.95    2.343    22.11
2005.95    2.391    20.72
2015.95    2.432    19.38
2025.95    2.465    18.08
2035.95    2.489    16.82
2045.95    2.503    15.57
2055.95    2.504    14.32
2065.95    2.491    13.07
2075.95    2.463    11.81
2085.95    2.418    10.50
2095.95    2.352     9.13
2105.95    2.266     7.67
2115.95    2.155     6.08
2125.95    2.019     4.29
2135.95    1.856     2.22
2145.95    1.666   359.70
2155.95    1.451   356.49
2165.95    1.213   352.07
2175.95    0.961   345.39
2185.95    0.711   333.95
2195.95    0.503   311.66
2205.95    0.432   273.00
2215.95    0.559   238.83
2225.95    0.790   220.93
2235.95    1.049   211.50
2245.95    1.310   205.83
2255.95    1.564   202.04
2265.95    1.806   199.28
2275.95    2.033   197.16
2285.95    2.246   195.45
2295.95    2.444   194.04
2305.95    2.627   192.82
2315.95    2.796   191.76
2325.95    2.951   190.82
2335.95    3.093   189.97
2345.95    3.223   189.19
2355.95    3.341   188.46
2365.95    3.448   187.79
2375.95    3.544   187.15
2385.95    3.631   186.54
2395.95    3.708   185.97
2405.95    3.776   185.41
2415.95    3.836   184.87
2425.95    3.888   184.35
2435.95    3.932   183.84
2445.95    3.969   183.34
2455.95    3.999   182.85
2465.95    4.023   182.36
2475.95    4.040   181.89
2485.95    4.052   181.41
2495.95    4.058   180.94
2505.95    4.058   180.46
2515.95    4.054   179.99
2525.95    4.044   179.51
2535.95    4.030   179.04
2545.95    4.011   178.55
2555.95    3.988   178.07
2565.95    3.960   177.57
2575.95    3.929   177.07
2585.95    3.894   176.56
2595.95    3.855   176.04
2605.95    3.813   175.51
2615.95    3.767   174.97
2625.95    3.719   174.42

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 18:25:13