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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:41:06

Orbital Elements for HDS1242

WDS:	HDS1242	WDS ID/Discoverer
P:	35.443	Orbital period (years)
a:	0.223	Semi-major axis (arcseconds)
i:	16.3	Inclination (degrees)
Ω:	247.8	Longitude of ascending node (degrees)
T:	2015.291	Epoch of periastron passage (year)
e:	0.386	Eccentricity
ω:	221.5	Longitude of periastron (degrees)
Start-Year:	2008.0	Year
End-Year:	2042.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1242

Position:	083759.08-084406.4	Epoch-2000 right ascension and declination
WDS-ID:	08380-0844	WDS designation
Discoverer Code:	HDS1242	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	73399	HD catalog number
Hipparcos number:	42345	Hipparcos catalog number
V1:	8.45	Magnitude of the primary
V2:	9.64	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS1242

WDS 6th Orbit including measures of HDS1242

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

Ephemeris of HDS1242

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.264    245.9
-------------------------
2008.0     0.223    351.7
2009.0     0.210      1.2
2010.0     0.195     12.1
2011.0     0.181     24.8
2012.0     0.167     39.7
2013.0     0.153     57.2
2014.0     0.142     77.7
2015.0     0.135    101.0
2016.0     0.135    125.7
2017.0     0.141    149.5
2018.0     0.153    170.3
2019.0     0.170    187.6
2020.0     0.187    201.7
2021.0     0.205    213.3
2022.0     0.222    223.1
2023.0     0.237    231.6
2024.0     0.251    239.1
2025.0     0.264    245.9
2026.0     0.274    252.1
2027.0     0.283    257.8
2028.0     0.290    263.3
2029.0     0.296    268.4
2030.0     0.300    273.5
2031.0     0.303    278.4
2032.0     0.304    283.2
2033.0     0.304    288.1
2034.0     0.302    292.9
2035.0     0.299    297.9
2036.0     0.294    303.0
2037.0     0.289    308.2
2038.0     0.282    313.7
2039.0     0.273    319.5
2040.0     0.264    325.7
2041.0     0.253    332.4

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.