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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:20:52

Orbital Elements for HDS71

WDS:	HDS71	WDS ID/Discoverer
P:	57.943	Orbital period (years)
a:	0.2666	Semi-major axis (arcseconds)
i:	132.3	Inclination (degrees)
Ω:	126.6	Longitude of ascending node (degrees)
T:	2034.432	Epoch of periastron passage (year)
e:	0.233	Eccentricity
ω:	325.3	Longitude of periastron (degrees)
Start-Year:	1997.0	Year
End-Year:	2053.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS71

Position:	003207.04-121742.1	Epoch-2000 right ascension and declination
WDS-ID:	00321-1218	WDS designation
Discoverer Code:	HDS71	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	2893	HD catalog number
Hipparcos number:	2532	Hipparcos catalog number
V1:	8.97	Magnitude of the primary
V2:	9.46	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS71

WDS 6th Orbit including measures of HDS71

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

Ephemeris of HDS71

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.188    256.3
-------------------------
1997.0     0.225      7.6
1998.0     0.234      2.1
1999.0     0.243    357.0
2000.0     0.253    352.3
2001.0     0.262    348.0
2002.0     0.271    343.9
2003.0     0.280    340.1
2004.0     0.288    336.5
2005.0     0.295    333.1
2006.0     0.301    329.9
2007.0     0.307    326.7
2008.0     0.311    323.7
2009.0     0.315    320.8
2010.0     0.317    317.9
2011.0     0.317    315.0
2012.0     0.317    312.1
2013.0     0.315    309.2
2014.0     0.311    306.3
2015.0     0.307    303.2
2016.0     0.300    300.1
2017.0     0.292    296.8
2018.0     0.283    293.3
2019.0     0.273    289.6
2020.0     0.261    285.5
2021.0     0.247    281.0
2022.0     0.233    276.0
2023.0     0.218    270.4
2024.0     0.203    263.9
2025.0     0.188    256.3
2026.0     0.174    247.5
2027.0     0.163    237.3
2028.0     0.154    225.7
2029.0     0.149    213.0
2030.0     0.149    199.9
2031.0     0.153    187.1
2032.0     0.160    175.3
2033.0     0.170    164.7
2034.0     0.181    155.3
2035.0     0.191    147.0
2036.0     0.200    139.4
2037.0     0.207    132.5
2038.0     0.212    125.9
2039.0     0.215    119.5
2040.0     0.215    113.3
2041.0     0.214    107.0
2042.0     0.211    100.6
2043.0     0.207     94.0
2044.0     0.203     87.1
2045.0     0.199     79.9
2046.0     0.195     72.5
2047.0     0.193     64.8
2048.0     0.191     56.9
2049.0     0.192     49.0
2050.0     0.194     41.2
2051.0     0.197     33.7
2052.0     0.202     26.4

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.