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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:58:58

Orbital Elements for SIG1

WDS:	SIG1	WDS ID/Discoverer
P:	14.820	Orbital period (years)
a:	0.0965	Semi-major axis (arcseconds)
i:	62.4	Inclination (degrees)
Ω:	82.1	Longitude of ascending node (degrees)
T:	2020.085	Epoch of periastron passage (year)
e:	0.706	Eccentricity
ω:	168.0	Longitude of periastron (degrees)
Start-Year:	2018.0	Year
End-Year:	2032.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for SIG1

Position:	042149.56+192908.6	Epoch-2000 right ascension and declination
WDS-ID:	04218+1929	WDS designation
Discoverer Code:	SIG1	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	13.1	Magnitude of the primary
V2:	13.9	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for SIG1

WDS 6th Orbit including measures of SIG1

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

Ephemeris of SIG1

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.138     68.5
-------------------------
2018.0     0.086     98.4
2019.0     0.043    117.8
2020.0     0.026    247.8
2021.0     0.027    355.5
2022.0     0.060     44.1
2023.0     0.093     57.3
2024.0     0.118     64.0
2025.0     0.138     68.5
2026.0     0.152     72.0
2027.0     0.160     75.1
2028.0     0.163     77.9
2029.0     0.160     80.7
2030.0     0.151     83.8
2031.0     0.136     87.4

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.