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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:21:00

Orbital Elements for HDS3038

WDS:	HDS3038	WDS ID/Discoverer
P:	78.200	Orbital period (years)
a:	0.231	Semi-major axis (arcseconds)
i:	91.1	Inclination (degrees)
Ω:	126.1	Longitude of ascending node (degrees)
T:	2012.840	Epoch of periastron passage (year)
e:	0.25	Eccentricity
ω:	274.3	Longitude of periastron (degrees)
Start-Year:	1986.0	Year
End-Year:	2064.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS3038

Position:	212033.52+131001.3	Epoch-2000 right ascension and declination
WDS-ID:	21206+1310	WDS designation
Discoverer Code:	HDS3038	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	203220	HD catalog number
Hipparcos number:	105371	Hipparcos catalog number
V1:	8.28	Magnitude of the primary
V2:	11.01	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS3038

WDS 6th Orbit including measures of HDS3038

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

Ephemeris of HDS3038

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.211    126.1
-------------------------
1986.0     0.177    307.4
1987.0     0.186    307.2
1988.0     0.195    307.1
1989.0     0.203    307.0
1990.0     0.210    306.9
1991.0     0.216    306.8
1992.0     0.220    306.7
1993.0     0.224    306.6
1994.0     0.227    306.5
1995.0     0.228    306.4
1996.0     0.228    306.3
1997.0     0.226    306.2
1998.0     0.223    306.2
1999.0     0.219    306.1
2000.0     0.212    306.0
2001.0     0.204    305.9
2002.0     0.194    305.7
2003.0     0.183    305.6
2004.0     0.169    305.5
2005.0     0.154    305.3
2006.0     0.137    305.1
2007.0     0.119    304.8
2008.0     0.098    304.4
2009.0     0.077    303.8
2010.0     0.054    302.7
2011.0     0.031    300.0
2012.0     0.008    281.0
2013.0     0.017    137.2
2014.0     0.041    130.7
2015.0     0.064    128.9
2016.0     0.086    128.1
2017.0     0.107    127.6
2018.0     0.126    127.2
2019.0     0.144    127.0
2020.0     0.160    126.8
2021.0     0.174    126.6
2022.0     0.186    126.5
2023.0     0.196    126.4
2024.0     0.204    126.2
2025.0     0.211    126.1
2026.0     0.215    126.0
2027.0     0.218    125.9
2028.0     0.219    125.8
2029.0     0.219    125.8
2030.0     0.217    125.7
2031.0     0.214    125.6
2032.0     0.210    125.5
2033.0     0.205    125.4
2034.0     0.198    125.2
2035.0     0.191    125.1
2036.0     0.182    125.0
2037.0     0.173    124.8
2038.0     0.163    124.7
2039.0     0.152    124.5
2040.0     0.141    124.3
2041.0     0.129    124.0
2042.0     0.117    123.7
2043.0     0.104    123.3
2044.0     0.091    122.9
2045.0     0.077    122.2
2046.0     0.063    121.3
2047.0     0.049    119.8
2048.0     0.035    117.2
2049.0     0.021    111.1
2050.0     0.008     84.5
2051.0     0.010    340.3
2052.0     0.023    319.9
2053.0     0.037    314.6
2054.0     0.051    312.2
2055.0     0.065    310.8
2056.0     0.079    309.9
2057.0     0.092    309.3
2058.0     0.106    308.9
2059.0     0.118    308.5
2060.0     0.131    308.2
2061.0     0.143    307.9
2062.0     0.154    307.7
2063.0     0.165    307.6

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.