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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:18:49

Orbital Elements for HEI198

WDS:	HEI198	WDS ID/Discoverer
P:	53.730	Orbital period (years)
a:	0.114	Semi-major axis (arcseconds)
i:	137.1	Inclination (degrees)
Ω:	153.6	Longitude of ascending node (degrees)
T:	2010.320	Epoch of periastron passage (year)
e:	0.412	Eccentricity
ω:	205.7	Longitude of periastron (degrees)
Start-Year:	1999.0	Year
End-Year:	2051.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HEI198

Position:	001624.38-702332.6	Epoch-2000 right ascension and declination
WDS-ID:	00164-7024	WDS designation
Discoverer Code:	HEI198	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	1261	HD catalog number
Hipparcos number:	1309	Hipparcos catalog number
V1:	7.80	Magnitude of the primary
V2:	8.26	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:		Flags

Double Star Orbit for HEI198

WDS 6th Orbit including measures of HEI198

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

Ephemeris of HEI198

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.134    165.4
-------------------------
1999.0     0.090     72.7
2000.0     0.085     65.1
2001.0     0.081     56.7
2002.0     0.078     47.6
2003.0     0.076     37.8
2004.0     0.074     27.5
2005.0     0.073     16.8
2006.0     0.073      5.9
2007.0     0.072    354.9
2008.0     0.071    343.5
2009.0     0.069    331.6
2010.0     0.065    318.6
2011.0     0.061    304.1
2012.0     0.058    287.7
2013.0     0.056    269.7
2014.0     0.057    251.5
2015.0     0.061    234.8
2016.0     0.068    220.8
2017.0     0.075    209.4
2018.0     0.084    200.2
2019.0     0.092    192.7
2020.0     0.101    186.4
2021.0     0.109    181.1
2022.0     0.116    176.5
2023.0     0.123    172.4
2024.0     0.129    168.8
2025.0     0.134    165.4
2026.0     0.139    162.3
2027.0     0.143    159.4
2028.0     0.147    156.6
2029.0     0.150    154.0
2030.0     0.153    151.5
2031.0     0.154    149.0
2032.0     0.156    146.6
2033.0     0.156    144.2
2034.0     0.157    141.8
2035.0     0.156    139.5
2036.0     0.155    137.1
2037.0     0.154    134.6
2038.0     0.152    132.2
2039.0     0.150    129.6
2040.0     0.147    127.0
2041.0     0.144    124.3
2042.0     0.141    121.4
2043.0     0.137    118.4
2044.0     0.133    115.2
2045.0     0.128    111.8
2046.0     0.124    108.1
2047.0     0.119    104.2
2048.0     0.114     99.9
2049.0     0.108     95.2
2050.0     0.103     90.0

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.