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

Double Star Calculator - Orbit

- Revision:   $Rev: 1216 $
- Report created:   2025-07-11 19:11:30

Orbital Elements for HDS2873
WDS: HDS2873 WDS ID/Discoverer
P: 90.000 Orbital period (years)
a: 0.3843 Semi-major axis (arcseconds)
i: 94.0 Inclination (degrees)
Ω: 35.2 Longitude of ascending node (degrees)
T: 2007.460 Epoch of periastron passage (year)
e: 0.484 Eccentricity
ω: -0.3 Longitude of periastron (degrees)
Start-Year: 1980.0 Year
End-Year: 2070.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2873
Position: 201025.46-192259.4 Epoch-2000 right ascension and declination
WDS-ID: 20104-1923 WDS designation
Discoverer Code: HDS2873 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 191434 HD catalog number
Hipparcos number: 99391 Hipparcos catalog number
V1: 7.49 Magnitude of the primary
V2: 10.22 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

Range error in Orbital Elements >>- Argument of periastron omega_l must be between 0 (inclusive) and 360 (exclusive) degrees<<