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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:54:53

Orbital Elements for V815HER

WDS:	V815HER	WDS ID/Discoverer
P:	5.728	Orbital period (years)
a:	0.048799999999999996	Semi-major axis (arcseconds)
i:	78.4	Inclination (degrees)
Ω:	69.2	Longitude of ascending node (degrees)
T:	1997.373	Epoch of periastron passage (year)
e:	0.765	Eccentricity
ω:	288.7	Longitude of periastron (degrees)
Start-Year:	2023.0	Year
End-Year:	2027.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for V815HER

Position:	180815.96+294128.3	Epoch-2000 right ascension and declination
WDS-ID:	18083+2941	WDS designation
Discoverer Code:	V815HER	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	166181	HD catalog number
Hipparcos number:	88848	Hipparcos catalog number
V1:	7.70	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for V815HER

WDS 6th Orbit including measures of V815HER

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

Ephemeris of V815HER

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.046    239.5
-------------------------
2023.0     0.030    215.4
2024.0     0.043    230.2
2025.0     0.046    239.5
2026.0     0.003     14.8

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.