Double Star Calculator - Orbit

Orbital Elements for A207

WDS:	A207	WDS ID/Discoverer
P:	1204.600	Orbital period (years)
a:	0.95	Semi-major axis (arcseconds)
i:	31.1	Inclination (degrees)
Ω:	31.3	Longitude of ascending node (degrees)
T:	1937.270	Epoch of periastron passage (year)
e:	0.816	Eccentricity
ω:	193.9	Longitude of periastron (degrees)
Start-Year:	1422.7	Year
End-Year:	2627.3	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A207
Position:	021810.10+391939.8	Epoch-2000 right ascension and declination
WDS-ID:	02182+3920	WDS designation
Discoverer Code:	A207	Discover designation and components
ADS number:	1762	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	10735	Hipparcos catalog number
V1:	9.69	Magnitude of the primary
V2:	10.30	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2020	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Sca2020f	Reference

Double Star Orbit for A207

WDS 6th Orbit including measures of A207

-- 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 A207

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.665     0.98
--------------------------
1422.70    1.677    47.32
1432.70    1.670    47.80
1442.70    1.662    48.28
1452.70    1.654    48.77
1462.70    1.644    49.26
1472.70    1.634    49.75
1482.70    1.624    50.26
1492.70    1.612    50.77
1502.70    1.600    51.28
1512.70    1.587    51.81
1522.70    1.574    52.34
1532.70    1.559    52.89
1542.70    1.544    53.44
1552.70    1.529    54.01
1562.70    1.512    54.58
1572.70    1.495    55.18
1582.70    1.476    55.78
1592.70    1.457    56.40
1602.70    1.438    57.04
1612.70    1.417    57.69
1622.70    1.395    58.37
1632.70    1.373    59.06
1642.70    1.350    59.78
1652.70    1.326    60.53
1662.70    1.301    61.31
1672.70    1.274    62.11
1682.70    1.247    62.95
1692.70    1.219    63.83
1702.70    1.190    64.75
1712.70    1.160    65.71
1722.70    1.129    66.73
1732.70    1.096    67.81
1742.70    1.062    68.96
1752.70    1.027    70.18
1762.70    0.991    71.49
1772.70    0.953    72.91
1782.70    0.914    74.44
1792.70    0.874    76.11
1802.70    0.832    77.94
1812.70    0.788    79.98
1822.70    0.742    82.26
1832.70    0.695    84.85
1842.70    0.646    87.82
1852.70    0.595    91.30
1862.70    0.541    95.44
1872.70    0.486   100.51
1882.70    0.429   106.91
1892.70    0.371   115.29
1902.70    0.313   126.79
1912.70    0.258   143.38
1922.70    0.211   168.12
1932.70    0.181   203.69
1942.70    0.173   247.67
1952.70    0.202   287.28
1962.70    0.259   313.11
1972.70    0.327   328.87
1982.70    0.396   339.17
1992.70    0.462   346.46
2002.70    0.526   351.94
2012.70    0.587   356.26
2022.70    0.644   359.79
2032.70    0.699     2.76
2042.70    0.751     5.30
2052.70    0.800     7.52
2062.70    0.848     9.49
2072.70    0.893    11.25
2082.70    0.936    12.85
2092.70    0.977    14.31
2102.70    1.017    15.65
2112.70    1.055    16.89
2122.70    1.091    18.05
2132.70    1.126    19.14
2142.70    1.159    20.16
2152.70    1.191    21.13
2162.70    1.222    22.05
2172.70    1.252    22.92
2182.70    1.280    23.75
2192.70    1.307    24.55
2202.70    1.333    25.31
2212.70    1.358    26.05
2222.70    1.382    26.76
2232.70    1.405    27.45
2242.70    1.427    28.11
2252.70    1.448    28.76
2262.70    1.468    29.39
2272.70    1.488    30.00
2282.70    1.506    30.60
2292.70    1.523    31.18
2302.70    1.540    31.75
2312.70    1.556    32.30
2322.70    1.570    32.85
2332.70    1.585    33.39
2342.70    1.598    33.91
2352.70    1.610    34.43
2362.70    1.622    34.94
2372.70    1.633    35.45
2382.70    1.643    35.94
2392.70    1.653    36.44
2402.70    1.662    36.92
2412.70    1.670    37.40
2422.70    1.677    37.88
2432.70    1.684    38.35
2442.70    1.690    38.82
2452.70    1.695    39.29
2462.70    1.700    39.75
2472.70    1.703    40.21
2482.70    1.707    40.67
2492.70    1.709    41.13
2502.70    1.711    41.59
2512.70    1.712    42.04
2522.70    1.713    42.50
2532.70    1.712    42.95
2542.70    1.712    43.41
2552.70    1.710    43.86
2562.70    1.708    44.32
2572.70    1.705    44.78
2582.70    1.701    45.24
2592.70    1.697    45.70
2602.70    1.692    46.17
2612.70    1.687    46.63
2622.70    1.680    47.10

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 14:59:08