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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:41:18

Orbital Elements for HDS1245

WDS:	HDS1245	WDS ID/Discoverer
P:	33.840	Orbital period (years)
a:	0.2118	Semi-major axis (arcseconds)
i:	129.5	Inclination (degrees)
Ω:	299.6	Longitude of ascending node (degrees)
T:	2013.175	Epoch of periastron passage (year)
e:	0.781	Eccentricity
ω:	97.3	Longitude of periastron (degrees)
Start-Year:	2009.0	Year
End-Year:	2041.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1245

Position:	083950.85-660416.7	Epoch-2000 right ascension and declination
WDS-ID:	08398-6604	WDS designation
Discoverer Code:	HDS1245	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	74376	HD catalog number
Hipparcos number:	42496	Hipparcos catalog number
V1:	10.07	Magnitude of the primary
V2:	11.83	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS1245

WDS 6th Orbit including measures of HDS1245

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

Ephemeris of HDS1245

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.226     35.6
-------------------------
2009.0     0.177    330.7
2010.0     0.157    324.0
2011.0     0.130    314.8
2012.0     0.091    299.2
2013.0     0.032    234.3
2014.0     0.074    120.6
2015.0     0.111     98.3
2016.0     0.135     85.8
2017.0     0.153     76.7
2018.0     0.167     69.3
2019.0     0.179     63.0
2020.0     0.190     57.4
2021.0     0.199     52.4
2022.0     0.207     47.8
2023.0     0.214     43.5
2024.0     0.220     39.4
2025.0     0.226     35.6
2026.0     0.230     32.0
2027.0     0.234     28.5
2028.0     0.238     25.1
2029.0     0.241     21.8
2030.0     0.243     18.5
2031.0     0.244     15.3
2032.0     0.245     12.1
2033.0     0.244      9.0
2034.0     0.243      5.8
2035.0     0.241      2.6
2036.0     0.238    359.3
2037.0     0.234    355.9
2038.0     0.229    352.3
2039.0     0.222    348.6
2040.0     0.214    344.6

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.