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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:33:26

Orbital Elements for A2176

WDS:	A2176	WDS ID/Discoverer
P:	52.680	Orbital period (years)
a:	0.148	Semi-major axis (arcseconds)
i:	27.2	Inclination (degrees)
Ω:	97.7	Longitude of ascending node (degrees)
T:	1987.160	Epoch of periastron passage (year)
e:	0.653	Eccentricity
ω:	279.3	Longitude of periastron (degrees)
Start-Year:	1999.0	Year
End-Year:	2051.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2176

Position:	154201.39+002725.5	Epoch-2000 right ascension and declination
WDS-ID:	15420+0027	WDS designation
Discoverer Code:	A2176	Discover designation and components
ADS number:	9747	Aitken Double Star catalog
HD number:	140122	HD catalog number
Hipparcos number:	76892	Hipparcos catalog number
V1:	8.0	Magnitude of the primary
V2:	8.0	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A2176

WDS 6th Orbit including measures of A2176

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

Ephemeris of A2176

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.194    224.2
-------------------------
1999.0     0.171    161.8
2000.0     0.178    165.1
2001.0     0.183    168.2
2002.0     0.189    171.2
2003.0     0.193    173.9
2004.0     0.198    176.6
2005.0     0.202    179.1
2006.0     0.205    181.5
2007.0     0.208    183.9
2008.0     0.211    186.2
2009.0     0.213    188.4
2010.0     0.215    190.6
2011.0     0.216    192.8
2012.0     0.217    194.9
2013.0     0.218    197.1
2014.0     0.218    199.2
2015.0     0.218    201.3
2016.0     0.218    203.4
2017.0     0.217    205.6
2018.0     0.216    207.7
2019.0     0.214    209.9
2020.0     0.212    212.1
2021.0     0.209    214.4
2022.0     0.206    216.7
2023.0     0.203    219.1
2024.0     0.199    221.6
2025.0     0.194    224.2
2026.0     0.189    227.0
2027.0     0.184    229.9
2028.0     0.177    233.0
2029.0     0.170    236.3
2030.0     0.163    239.9
2031.0     0.154    243.9
2032.0     0.145    248.4
2033.0     0.135    253.6
2034.0     0.123    259.6
2035.0     0.111    267.0
2036.0     0.097    276.4
2037.0     0.081    289.2
2038.0     0.065    308.4
2039.0     0.050    339.9
2040.0     0.046     25.8
2041.0     0.056     65.8
2042.0     0.071     91.0
2043.0     0.086    107.4
2044.0     0.100    119.1
2045.0     0.112    128.1
2046.0     0.123    135.4
2047.0     0.134    141.5
2048.0     0.143    146.8
2049.0     0.151    151.5
2050.0     0.159    155.6

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.