Double Star Calculator - Orbit

Orbital Elements for A2901

WDS:	A2901	WDS ID/Discoverer
P:	1517.340	Orbital period (years)
a:	0.99	Semi-major axis (arcseconds)
i:	69.3	Inclination (degrees)
Ω:	48.4	Longitude of ascending node (degrees)
T:	1950.560	Epoch of periastron passage (year)
e:	0.621	Eccentricity
ω:	330.2	Longitude of periastron (degrees)
Start-Year:	1266.33	Year
End-Year:	2783.67	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2901
Position:	010130.15+692130.7	Epoch-2000 right ascension and declination
WDS-ID:	01015+6922	WDS designation
Discoverer Code:	A2901	Discover designation and components
ADS number:	836	Aitken Double Star catalog
HD number:	5839	HD catalog number
Hipparcos number:	4789	Hipparcos catalog number
V1:	7.12	Magnitude of the primary
V2:	7.84	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2001	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Nov2007d	Reference

Double Star Orbit for A2901

WDS 6th Orbit including measures of A2901

-- 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 A2901

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.389    68.91
--------------------------
1266.33    1.469   219.25
1276.33    1.473   219.54
1286.33    1.476   219.84
1296.33    1.479   220.13
1306.33    1.482   220.43
1316.33    1.484   220.72
1326.33    1.485   221.01
1336.33    1.485   221.31
1346.33    1.485   221.60
1356.33    1.485   221.89
1366.33    1.483   222.18
1376.33    1.482   222.48
1386.33    1.479   222.77
1396.33    1.476   223.07
1406.33    1.472   223.36
1416.33    1.468   223.66
1426.33    1.462   223.96
1436.33    1.456   224.26
1446.33    1.450   224.57
1456.33    1.443   224.88
1466.33    1.435   225.19
1476.33    1.426   225.50
1486.33    1.416   225.82
1496.33    1.406   226.14
1506.33    1.395   226.47
1516.33    1.383   226.81
1526.33    1.370   227.15
1536.33    1.357   227.49
1546.33    1.343   227.85
1556.33    1.327   228.21
1566.33    1.311   228.58
1576.33    1.294   228.96
1586.33    1.276   229.35
1596.33    1.257   229.75
1606.33    1.237   230.16
1616.33    1.216   230.59
1626.33    1.194   231.03
1636.33    1.171   231.50
1646.33    1.147   231.97
1656.33    1.122   232.47
1666.33    1.096   233.00
1676.33    1.068   233.55
1686.33    1.039   234.13
1696.33    1.009   234.74
1706.33    0.978   235.40
1716.33    0.945   236.09
1726.33    0.911   236.84
1736.33    0.875   237.65
1746.33    0.838   238.53
1756.33    0.799   239.49
1766.33    0.759   240.56
1776.33    0.717   241.74
1786.33    0.673   243.08
1796.33    0.628   244.60
1806.33    0.581   246.37
1816.33    0.532   248.46
1826.33    0.482   250.97
1836.33    0.430   254.08
1846.33    0.378   258.04
1856.33    0.325   263.30
1866.33    0.273   270.56
1876.33    0.226   281.05
1886.33    0.187   296.51
1896.33    0.164   317.96
1906.33    0.167   342.02
1916.33    0.193     2.36
1926.33    0.232    16.87
1936.33    0.275    26.98
1946.33    0.316    34.36
1956.33    0.352    40.13
1966.33    0.379    44.94
1976.33    0.398    49.19
1986.33    0.409    53.14
1996.33    0.412    56.96
2006.33    0.408    60.78
2016.33    0.401    64.71
2026.33    0.389    68.83
2036.33    0.376    73.23
2046.33    0.361    77.97
2056.33    0.347    83.11
2066.33    0.333    88.70
2076.33    0.320    94.76
2086.33    0.310   101.27
2096.33    0.302   108.16
2106.33    0.298   115.33
2116.33    0.298   122.60
2126.33    0.301   129.80
2136.33    0.309   136.74
2146.33    0.319   143.29
2156.33    0.333   149.35
2166.33    0.350   154.87
2176.33    0.369   159.87
2186.33    0.390   164.35
2196.33    0.412   168.36
2206.33    0.436   171.95
2216.33    0.460   175.17
2226.33    0.485   178.05
2236.33    0.511   180.65
2246.33    0.537   183.00
2256.33    0.563   185.14
2266.33    0.589   187.08
2276.33    0.616   188.85
2286.33    0.642   190.48
2296.33    0.668   191.99
2306.33    0.694   193.37
2316.33    0.720   194.66
2326.33    0.746   195.86
2336.33    0.771   196.98
2346.33    0.796   198.03
2356.33    0.821   199.02
2366.33    0.845   199.95
2376.33    0.869   200.82
2386.33    0.893   201.65
2396.33    0.916   202.44
2406.33    0.939   203.19
2416.33    0.962   203.90
2426.33    0.984   204.58
2436.33    1.006   205.23
2446.33    1.027   205.86
2456.33    1.048   206.45
2466.33    1.068   207.03
2476.33    1.088   207.58
2486.33    1.108   208.12
2496.33    1.127   208.63
2506.33    1.146   209.13
2516.33    1.164   209.62
2526.33    1.182   210.08
2536.33    1.199   210.54
2546.33    1.216   210.98
2556.33    1.232   211.41
2566.33    1.248   211.83
2576.33    1.263   212.24
2586.33    1.278   212.64
2596.33    1.293   213.03
2606.33    1.307   213.41
2616.33    1.320   213.78
2626.33    1.333   214.15
2636.33    1.345   214.51
2646.33    1.357   214.86
2656.33    1.369   215.21
2666.33    1.380   215.55
2676.33    1.390   215.88
2686.33    1.400   216.21
2696.33    1.409   216.54
2706.33    1.418   216.86
2716.33    1.427   217.18
2726.33    1.435   217.50
2736.33    1.442   217.81
2746.33    1.449   218.12
2756.33    1.455   218.42
2766.33    1.460   218.73
2776.33    1.465   219.03

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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 14:46:20