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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:32:50

Orbital Elements for HDS1013AA,AB

WDS:	HDS1013AA,AB	WDS ID/Discoverer
P:	59.020	Orbital period (years)
a:	0.361	Semi-major axis (arcseconds)
i:	22.6	Inclination (degrees)
Ω:	178.4	Longitude of ascending node (degrees)
T:	1998.708	Epoch of periastron passage (year)
e:	0.227	Eccentricity
ω:	124.8	Longitude of periastron (degrees)
Start-Year:	1996.0	Year
End-Year:	2054.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1013AA,AB

Position:	071827.12-572106.5	Epoch-2000 right ascension and declination
WDS-ID:	07185-5721	WDS designation
Discoverer Code:	HDS1013AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	57555	HD catalog number
Hipparcos number:	35374	Hipparcos catalog number
V1:	8.37	Magnitude of the primary
V2:	9.16	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS1013AA,AB

WDS 6th Orbit including measures of HDS1013AA,AB

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

Ephemeris of HDS1013AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.411    112.1
-------------------------
1996.0     0.263    277.3
1997.0     0.262    287.7
1998.0     0.263    298.1
1999.0     0.266    308.3
2000.0     0.271    318.3
2001.0     0.277    327.8
2002.0     0.284    336.9
2003.0     0.291    345.6
2004.0     0.299    353.8
2005.0     0.306      1.6
2006.0     0.313      9.0
2007.0     0.320     16.2
2008.0     0.327     23.0
2009.0     0.333     29.6
2010.0     0.339     35.9
2011.0     0.344     42.1
2012.0     0.350     48.0
2013.0     0.355     53.7
2014.0     0.360     59.3
2015.0     0.365     64.8
2016.0     0.370     70.1
2017.0     0.375     75.2
2018.0     0.380     80.2
2019.0     0.385     85.1
2020.0     0.390     89.8
2021.0     0.395     94.5
2022.0     0.399     99.0
2023.0     0.403    103.5
2024.0     0.407    107.8
2025.0     0.411    112.1
2026.0     0.414    116.3
2027.0     0.417    120.4
2028.0     0.420    124.5
2029.0     0.422    128.5
2030.0     0.423    132.5
2031.0     0.424    136.5
2032.0     0.425    140.5
2033.0     0.425    144.4
2034.0     0.424    148.4
2035.0     0.422    152.4
2036.0     0.419    156.4
2037.0     0.416    160.5
2038.0     0.412    164.7
2039.0     0.407    169.0
2040.0     0.401    173.3
2041.0     0.394    177.9
2042.0     0.387    182.5
2043.0     0.378    187.4
2044.0     0.369    192.6
2045.0     0.358    198.0
2046.0     0.348    203.7
2047.0     0.336    209.8
2048.0     0.325    216.4
2049.0     0.313    223.4
2050.0     0.302    230.9
2051.0     0.291    239.1
2052.0     0.281    247.8
2053.0     0.273    257.1

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.