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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:05:10

Orbital Elements for HDS2734AA,AB

WDS:	HDS2734AA,AB	WDS ID/Discoverer
P:	36.830	Orbital period (years)
a:	0.296	Semi-major axis (arcseconds)
i:	0.0	Inclination (degrees)
Ω:	19.85	Longitude of ascending node (degrees)
T:	2020.100	Epoch of periastron passage (year)
e:	0.625	Eccentricity
ω:	0.0	Longitude of periastron (degrees)
Start-Year:	2007.0	Year
End-Year:	2043.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2734AA,AB

Position:	191926.50-013657.7	Epoch-2000 right ascension and declination
WDS-ID:	19194-0136	WDS designation
Discoverer Code:	HDS2734AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	181148	HD catalog number
Hipparcos number:	94960	Hipparcos catalog number
V1:	10.97	Magnitude of the primary
V2:	11.37	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS2734AA,AB

WDS 6th Orbit including measures of HDS2734AA,AB

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

Ephemeris of HDS2734AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.275    143.2
-------------------------
2007.0     0.452    215.9
2008.0     0.440    219.2
2009.0     0.425    222.8
2010.0     0.408    226.7
2011.0     0.388    230.9
2012.0     0.366    235.6
2013.0     0.341    240.9
2014.0     0.313    247.2
2015.0     0.282    254.7
2016.0     0.247    264.3
2017.0     0.209    277.3
2018.0     0.169    296.2
2019.0     0.131    326.7
2020.0     0.111     14.4
2021.0     0.125     64.8
2022.0     0.161     98.5
2023.0     0.201    119.3
2024.0     0.240    133.1
2025.0     0.275    143.2
2026.0     0.307    151.2
2027.0     0.336    157.6
2028.0     0.361    163.1
2029.0     0.384    167.9
2030.0     0.404    172.2
2031.0     0.422    176.2
2032.0     0.437    179.8
2033.0     0.450    183.2
2034.0     0.460    186.4
2035.0     0.468    189.5
2036.0     0.475    192.5
2037.0     0.479    195.5
2038.0     0.481    198.4
2039.0     0.481    201.3
2040.0     0.479    204.2
2041.0     0.475    207.1
2042.0     0.469    210.1

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.