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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:29:47

Orbital Elements for HDS213

WDS:	HDS213	WDS ID/Discoverer
P:	54.663	Orbital period (years)
a:	0.1771	Semi-major axis (arcseconds)
i:	56.1	Inclination (degrees)
Ω:	24.2	Longitude of ascending node (degrees)
T:	2054.258	Epoch of periastron passage (year)
e:	0.862	Eccentricity
ω:	347.7	Longitude of periastron (degrees)
Start-Year:	1998.0	Year
End-Year:	2052.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS213

Position:	013521.58+112604.0	Epoch-2000 right ascension and declination
WDS-ID:	01354+1126	WDS designation
Discoverer Code:	HDS213	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	7397	Hipparcos catalog number
V1:	12.67	Magnitude of the primary
V2:	12.75	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2015	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS213

WDS 6th Orbit including measures of HDS213

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

Ephemeris of HDS213

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.322    196.2
-------------------------
1998.0     0.053    240.7
1999.0     0.021    297.2
2000.0     0.025     55.1
2001.0     0.037    128.6
2002.0     0.063    154.0
2003.0     0.088    164.6
2004.0     0.111    170.6
2005.0     0.132    174.6
2006.0     0.151    177.6
2007.0     0.168    179.8
2008.0     0.185    181.7
2009.0     0.200    183.3
2010.0     0.214    184.7
2011.0     0.226    185.9
2012.0     0.238    187.0
2013.0     0.249    187.9
2014.0     0.259    188.8
2015.0     0.269    189.7
2016.0     0.277    190.5
2017.0     0.285    191.2
2018.0     0.292    191.9
2019.0     0.298    192.6
2020.0     0.304    193.2
2021.0     0.309    193.9
2022.0     0.313    194.5
2023.0     0.317    195.0
2024.0     0.319    195.6
2025.0     0.322    196.2
2026.0     0.324    196.8
2027.0     0.325    197.3
2028.0     0.325    197.9
2029.0     0.325    198.4
2030.0     0.324    199.0
2031.0     0.323    199.5
2032.0     0.320    200.1
2033.0     0.318    200.7
2034.0     0.314    201.3
2035.0     0.310    201.9
2036.0     0.305    202.5
2037.0     0.299    203.1
2038.0     0.293    203.8
2039.0     0.286    204.5
2040.0     0.277    205.2
2041.0     0.268    206.0
2042.0     0.258    206.8
2043.0     0.247    207.7
2044.0     0.235    208.8
2045.0     0.222    209.9
2046.0     0.207    211.1
2047.0     0.191    212.6
2048.0     0.173    214.4
2049.0     0.153    216.6
2050.0     0.130    219.5
2051.0     0.105    223.8

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.