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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:17:58

Orbital Elements for HDS1887

WDS:	HDS1887	WDS ID/Discoverer
P:	46.993	Orbital period (years)
a:	0.3	Semi-major axis (arcseconds)
i:	126.5	Inclination (degrees)
Ω:	10.3	Longitude of ascending node (degrees)
T:	2013.099	Epoch of periastron passage (year)
e:	0.0	Eccentricity
ω:	0.0	Longitude of periastron (degrees)
Start-Year:	2002.0	Year
End-Year:	2048.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1887

Position:	132832.97-230554.4	Epoch-2000 right ascension and declination
WDS-ID:	13286-2306	WDS designation
Discoverer Code:	HDS1887	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	65740	Hipparcos catalog number
V1:	12.47	Magnitude of the primary
V2:	12.97	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS1887

WDS 6th Orbit including measures of HDS1887

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

Ephemeris of HDS1887

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.179    278.3
-------------------------
2002.0     0.180     92.0
2003.0     0.186     79.7
2004.0     0.197     68.4
2005.0     0.211     58.6
2006.0     0.227     50.0
2007.0     0.243     42.6
2008.0     0.259     36.1
2009.0     0.272     30.3
2010.0     0.284     25.0
2011.0     0.292     20.0
2012.0     0.298     15.3
2013.0     0.300     10.8
2014.0     0.299      6.2
2015.0     0.294      1.5
2016.0     0.286    356.6
2017.0     0.275    351.4
2018.0     0.262    345.7
2019.0     0.246    339.4
2020.0     0.230    332.1
2021.0     0.214    323.8
2022.0     0.200    314.2
2023.0     0.188    303.3
2024.0     0.181    291.1
2025.0     0.179    278.3
2026.0     0.182    265.7
2027.0     0.191    253.8
2028.0     0.204    243.3
2029.0     0.219    234.1
2030.0     0.235    226.1
2031.0     0.251    219.2
2032.0     0.266    213.1
2033.0     0.279    207.5
2034.0     0.289    202.4
2035.0     0.296    197.6
2036.0     0.299    193.0
2037.0     0.300    188.5
2038.0     0.297    183.9
2039.0     0.290    179.1
2040.0     0.281    174.1
2041.0     0.268    168.6
2042.0     0.254    162.6
2043.0     0.238    155.9
2044.0     0.222    148.1
2045.0     0.207    139.2
2046.0     0.193    128.9
2047.0     0.184    117.3

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.