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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:23:02

Orbital Elements for PES1

WDS:	PES1	WDS ID/Discoverer
P:	33.080	Orbital period (years)
a:	0.5199	Semi-major axis (arcseconds)
i:	46.3	Inclination (degrees)
Ω:	89.9	Longitude of ascending node (degrees)
T:	1997.069	Epoch of periastron passage (year)
e:	0.732	Eccentricity
ω:	266.9	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 PES1

Position:	004926.76-231244.9	Epoch-2000 right ascension and declination
WDS-ID:	00494-2313	WDS designation
Discoverer Code:	PES1	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	4747	HD catalog number
Hipparcos number:	3850	Hipparcos catalog number
V1:	5.3	Magnitude of the primary
V2:	14.5	Magnitude of the secondary
Equinox:		Equinox
Date:	2017	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for PES1

WDS 6th Orbit including measures of PES1

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

Ephemeris of PES1

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.459    225.2
-------------------------
2009.0     0.609    158.8
2010.0     0.616    162.5
2011.0     0.621    166.1
2012.0     0.623    169.7
2013.0     0.624    173.2
2014.0     0.622    176.8
2015.0     0.619    180.4
2016.0     0.614    184.0
2017.0     0.607    187.8
2018.0     0.598    191.6
2019.0     0.586    195.5
2020.0     0.573    199.6
2021.0     0.557    204.0
2022.0     0.538    208.6
2023.0     0.516    213.6
2024.0     0.490    219.0
2025.0     0.459    225.2
2026.0     0.422    232.3
2027.0     0.375    241.0
2028.0     0.312    252.8
2029.0     0.223    272.2
2030.0     0.103    334.3
2031.0     0.184     73.3
2032.0     0.294     98.1
2033.0     0.369    110.7
2034.0     0.424    119.5
2035.0     0.467    126.4
2036.0     0.502    132.3
2037.0     0.530    137.5
2038.0     0.553    142.3
2039.0     0.571    146.6
2040.0     0.587    150.8

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.