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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:18:59

Orbital Elements for HDS3004AB

WDS:	HDS3004AB	WDS ID/Discoverer
P:	80.420	Orbital period (years)
a:	0.463	Semi-major axis (arcseconds)
i:	58.0	Inclination (degrees)
Ω:	88.1	Longitude of ascending node (degrees)
T:	2016.780	Epoch of periastron passage (year)
e:	0.691	Eccentricity
ω:	48.7	Longitude of periastron (degrees)
Start-Year:	1985.0	Year
End-Year:	2065.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS3004AB

Position:	210507.95+075644.4	Epoch-2000 right ascension and declination
WDS-ID:	21051+0757	WDS designation
Discoverer Code:	HDS3004AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	200746	HD catalog number
Hipparcos number:	104075	Hipparcos catalog number
V1:	7.98	Magnitude of the primary
V2:	11.81	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS3004AB

WDS 6th Orbit including measures of HDS3004AB

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

Ephemeris of HDS3004AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.377    263.0
-------------------------
1985.0     0.524    308.9
1986.0     0.513    310.3
1987.0     0.501    311.7
1988.0     0.488    313.2
1989.0     0.475    314.8
1990.0     0.462    316.5
1991.0     0.448    318.2
1992.0     0.434    320.1
1993.0     0.420    322.1
1994.0     0.406    324.3
1995.0     0.391    326.6
1996.0     0.377    329.1
1997.0     0.362    331.8
1998.0     0.347    334.7
1999.0     0.333    337.9
2000.0     0.318    341.4
2001.0     0.304    345.2
2002.0     0.290    349.3
2003.0     0.277    353.9
2004.0     0.265    358.9
2005.0     0.253      4.4
2006.0     0.243     10.4
2007.0     0.234     16.9
2008.0     0.226     23.8
2009.0     0.220     31.2
2010.0     0.215     39.0
2011.0     0.210     47.2
2012.0     0.205     55.7
2013.0     0.199     64.7
2014.0     0.189     74.4
2015.0     0.171     85.7
2016.0     0.141    100.8
2017.0     0.102    126.4
2018.0     0.084    173.3
2019.0     0.113    214.9
2020.0     0.163    235.0
2021.0     0.214    245.5
2022.0     0.261    252.0
2023.0     0.304    256.7
2024.0     0.342    260.2
2025.0     0.377    263.0
2026.0     0.408    265.4
2027.0     0.436    267.5
2028.0     0.462    269.3
2029.0     0.485    270.9
2030.0     0.506    272.4
2031.0     0.525    273.8
2032.0     0.542    275.1
2033.0     0.557    276.3
2034.0     0.571    277.5
2035.0     0.583    278.6
2036.0     0.594    279.7
2037.0     0.604    280.7
2038.0     0.613    281.7
2039.0     0.620    282.6
2040.0     0.626    283.6
2041.0     0.631    284.5
2042.0     0.636    285.4
2043.0     0.639    286.3
2044.0     0.641    287.2
2045.0     0.643    288.1
2046.0     0.643    289.0
2047.0     0.643    289.9
2048.0     0.642    290.8
2049.0     0.641    291.7
2050.0     0.638    292.6
2051.0     0.635    293.5
2052.0     0.632    294.4
2053.0     0.627    295.3
2054.0     0.622    296.3
2055.0     0.617    297.2
2056.0     0.610    298.2
2057.0     0.603    299.2
2058.0     0.596    300.2
2059.0     0.588    301.3
2060.0     0.579    302.4
2061.0     0.570    303.5
2062.0     0.561    304.6
2063.0     0.551    305.8
2064.0     0.540    307.0

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.