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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:26:12

Orbital Elements for HDS144AB

WDS:	HDS144AB	WDS ID/Discoverer
P:	72.600	Orbital period (years)
a:	0.365	Semi-major axis (arcseconds)
i:	138.2	Inclination (degrees)
Ω:	281.9	Longitude of ascending node (degrees)
T:	2073.100	Epoch of periastron passage (year)
e:	0.237	Eccentricity
ω:	30.0	Longitude of periastron (degrees)
Start-Year:	1989.0	Year
End-Year:	2061.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS144AB

Position:	010704.52-003531.3	Epoch-2000 right ascension and declination
WDS-ID:	01071-0036	WDS designation
Discoverer Code:	HDS144AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	6639	HD catalog number
Hipparcos number:	5245	Hipparcos catalog number
V1:	9.21	Magnitude of the primary
V2:	11.76	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 HDS144AB

WDS 6th Orbit including measures of HDS144AB

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

Ephemeris of HDS144AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.420    108.5
-------------------------
1989.0     0.283    326.8
1990.0     0.285    320.9
1991.0     0.288    315.0
1992.0     0.289    309.3
1993.0     0.291    303.6
1994.0     0.291    298.0
1995.0     0.290    292.3
1996.0     0.288    286.6
1997.0     0.285    280.8
1998.0     0.280    274.8
1999.0     0.274    268.6
2000.0     0.267    262.0
2001.0     0.258    255.1
2002.0     0.250    247.7
2003.0     0.242    239.8
2004.0     0.235    231.3
2005.0     0.229    222.4
2006.0     0.226    213.1
2007.0     0.226    203.7
2008.0     0.228    194.4
2009.0     0.234    185.5
2010.0     0.242    177.0
2011.0     0.253    169.2
2012.0     0.265    162.0
2013.0     0.278    155.5
2014.0     0.292    149.6
2015.0     0.307    144.3
2016.0     0.321    139.4
2017.0     0.335    135.0
2018.0     0.349    130.9
2019.0     0.362    127.1
2020.0     0.374    123.6
2021.0     0.385    120.3
2022.0     0.396    117.1
2023.0     0.405    114.1
2024.0     0.413    111.3
2025.0     0.420    108.5
2026.0     0.426    105.9
2027.0     0.431    103.3
2028.0     0.435    100.7
2029.0     0.438     98.2
2030.0     0.440     95.7
2031.0     0.440     93.2
2032.0     0.440     90.8
2033.0     0.439     88.3
2034.0     0.437     85.8
2035.0     0.433     83.3
2036.0     0.429     80.7
2037.0     0.425     78.1
2038.0     0.419     75.4
2039.0     0.413     72.6
2040.0     0.406     69.8
2041.0     0.398     66.8
2042.0     0.390     63.7
2043.0     0.382     60.5
2044.0     0.373     57.2
2045.0     0.364     53.6
2046.0     0.355     49.9
2047.0     0.345     46.0
2048.0     0.336     41.9
2049.0     0.327     37.6
2050.0     0.319     33.0
2051.0     0.311     28.2
2052.0     0.304     23.1
2053.0     0.297     17.8
2054.0     0.292     12.3
2055.0     0.287      6.5
2056.0     0.284      0.7
2057.0     0.281    354.7
2058.0     0.280    348.6
2059.0     0.280    342.5
2060.0     0.281    336.4

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.