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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:52:16

Orbital Elements for B1871

WDS:	B1871	WDS ID/Discoverer
P:	34.710	Orbital period (years)
a:	0.172	Semi-major axis (arcseconds)
i:	80.5	Inclination (degrees)
Ω:	103.0	Longitude of ascending node (degrees)
T:	1974.100	Epoch of periastron passage (year)
e:	0.001	Eccentricity
ω:	183.0	Longitude of periastron (degrees)
Start-Year:	2008.0	Year
End-Year:	2042.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for B1871

Position:	175354.77-344509.8	Epoch-2000 right ascension and declination
WDS-ID:	17539-3445	WDS designation
Discoverer Code:	B1871	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	162724	HD catalog number
Hipparcos number:	87616	Hipparcos catalog number
V1:	6.5	Magnitude of the primary
V2:	7.3	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for B1871

WDS 6th Orbit including measures of B1871

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

Ephemeris of B1871

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.170    101.5
-------------------------
2008.0     0.171    282.1
2009.0     0.171    283.8
2010.0     0.166    285.6
2011.0     0.155    287.6
2012.0     0.140    289.9
2013.0     0.120    292.9
2014.0     0.097    297.2
2015.0     0.071    304.5
2016.0     0.046    320.1
2017.0     0.029      1.4
2018.0     0.038     54.9
2019.0     0.062     77.1
2020.0     0.087     86.5
2021.0     0.112     91.7
2022.0     0.133     95.1
2023.0     0.150     97.6
2024.0     0.163     99.7
2025.0     0.170    101.5
2026.0     0.172    103.2
2027.0     0.169    104.9
2028.0     0.160    106.8
2029.0     0.146    109.0
2030.0     0.128    111.7
2031.0     0.106    115.4
2032.0     0.081    121.3
2033.0     0.055    132.6
2034.0     0.033    161.2
2035.0     0.031    218.6
2036.0     0.052    251.2
2037.0     0.078    263.7
2038.0     0.103    270.0
2039.0     0.125    274.0
2040.0     0.144    276.7
2041.0     0.158    279.0

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.