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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:45:48

Orbital Elements for HDS404

WDS:	HDS404	WDS ID/Discoverer
P:	25.670	Orbital period (years)
a:	0.5345	Semi-major axis (arcseconds)
i:	97.186	Inclination (degrees)
Ω:	13.732	Longitude of ascending node (degrees)
T:	2034.721	Epoch of periastron passage (year)
e:	0.2271	Eccentricity
ω:	181.38	Longitude of periastron (degrees)
Start-Year:	2013.0	Year
End-Year:	2037.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS404

Position:	030930.81+454358.3	Epoch-2000 right ascension and declination
WDS-ID:	03095+4544	WDS designation
Discoverer Code:	HDS404	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	14669	Hipparcos catalog number
V1:	10.32	Magnitude of the primary
V2:	12.50	Magnitude of the secondary
Equinox:		Equinox
Date:	2016	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS404

WDS 6th Orbit including measures of HDS404

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

Ephemeris of HDS404

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.548      9.5
-------------------------
2013.0     0.094    153.9
2014.0     0.090     59.7
2015.0     0.203     32.1
2016.0     0.319     24.6
2017.0     0.422     21.0
2018.0     0.508     18.8
2019.0     0.576     17.1
2020.0     0.623     15.8
2021.0     0.650     14.6
2022.0     0.655     13.4
2023.0     0.640     12.3
2024.0     0.604     11.0
2025.0     0.548      9.5
2026.0     0.472      7.7
2027.0     0.379      5.0
2028.0     0.271      0.2
2029.0     0.153    348.5
2030.0     0.064    289.9
2031.0     0.138    218.6
2032.0     0.251    204.6
2033.0     0.346    199.1
2034.0     0.402    195.7
2035.0     0.410    192.8
2036.0     0.366    189.6

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.