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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:56:07

Orbital Elements for HDS2577

WDS:	HDS2577	WDS ID/Discoverer
P:	82.000	Orbital period (years)
a:	0.4	Semi-major axis (arcseconds)
i:	62.0	Inclination (degrees)
Ω:	259.0	Longitude of ascending node (degrees)
T:	1997.800	Epoch of periastron passage (year)
e:	0.36	Eccentricity
ω:	313.0	Longitude of periastron (degrees)
Start-Year:	1984.0	Year
End-Year:	2066.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2577

Position:	181521.73+572008.3	Epoch-2000 right ascension and declination
WDS-ID:	18154+5720	WDS designation
Discoverer Code:	HDS2577	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	168242	HD catalog number
Hipparcos number:	89455	Hipparcos catalog number
V1:	8.93	Magnitude of the primary
V2:	9.56	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2013	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS2577

WDS 6th Orbit including measures of HDS2577

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

Ephemeris of HDS2577

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.249     10.9
-------------------------
1984.0     0.337     94.5
1985.0     0.314     97.4
1986.0     0.290    100.8
1987.0     0.265    104.8
1988.0     0.238    109.6
1989.0     0.212    115.7
1990.0     0.186    123.6
1991.0     0.162    133.8
1992.0     0.143    147.3
1993.0     0.131    163.9
1994.0     0.130    182.4
1995.0     0.139    199.7
1996.0     0.156    214.0
1997.0     0.177    225.2
1998.0     0.200    233.9
1999.0     0.222    240.8
2000.0     0.242    246.5
2001.0     0.258    251.4
2002.0     0.272    255.8
2003.0     0.281    259.8
2004.0     0.287    263.6
2005.0     0.291    267.3
2006.0     0.291    270.9
2007.0     0.289    274.6
2008.0     0.284    278.3
2009.0     0.279    282.2
2010.0     0.272    286.3
2011.0     0.264    290.6
2012.0     0.256    295.1
2013.0     0.248    300.0
2014.0     0.240    305.1
2015.0     0.233    310.6
2016.0     0.227    316.5
2017.0     0.222    322.6
2018.0     0.219    328.9
2019.0     0.218    335.3
2020.0     0.219    341.8
2021.0     0.221    348.1
2022.0     0.226    354.3
2023.0     0.232      0.2
2024.0     0.240      5.7
2025.0     0.249     10.9
2026.0     0.259     15.7
2027.0     0.270     20.1
2028.0     0.282     24.1
2029.0     0.294     27.8
2030.0     0.307     31.2
2031.0     0.320     34.4
2032.0     0.333     37.2
2033.0     0.346     39.9
2034.0     0.359     42.4
2035.0     0.371     44.7
2036.0     0.383     46.9
2037.0     0.395     48.9
2038.0     0.407     50.8
2039.0     0.418     52.6
2040.0     0.428     54.4
2041.0     0.437     56.0
2042.0     0.446     57.6
2043.0     0.455     59.1
2044.0     0.462     60.6
2045.0     0.469     62.0
2046.0     0.475     63.4
2047.0     0.479     64.7
2048.0     0.483     66.0
2049.0     0.486     67.3
2050.0     0.488     68.6
2051.0     0.489     69.9
2052.0     0.488     71.2
2053.0     0.487     72.5
2054.0     0.484     73.8
2055.0     0.480     75.1
2056.0     0.475     76.5
2057.0     0.468     77.9
2058.0     0.460     79.3
2059.0     0.450     80.8
2060.0     0.439     82.3
2061.0     0.426     84.0
2062.0     0.411     85.7
2063.0     0.395     87.6
2064.0     0.378     89.7
2065.0     0.358     92.0

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.