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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:56:13

Orbital Elements for A2145

WDS:	A2145	WDS ID/Discoverer
P:	74.710	Orbital period (years)
a:	0.139	Semi-major axis (arcseconds)
i:	160.6	Inclination (degrees)
Ω:	127.1	Longitude of ascending node (degrees)
T:	1991.860	Epoch of periastron passage (year)
e:	0.829	Eccentricity
ω:	91.4	Longitude of periastron (degrees)
Start-Year:	1988.0	Year
End-Year:	2062.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2145

Position:	100919.63+201956.6	Epoch-2000 right ascension and declination
WDS-ID:	10093+2020	WDS designation
Discoverer Code:	A2145	Discover designation and components
ADS number:	7662	Aitken Double Star catalog
HD number:	88021	HD catalog number
Hipparcos number:	49747	Hipparcos catalog number
V1:	7.3	Magnitude of the primary
V2:	7.5	Magnitude of the secondary
Equinox:		Equinox
Date:	2019	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A2145

WDS 6th Orbit including measures of A2145

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

Ephemeris of A2145

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.238    219.2
-------------------------
1988.0     0.079    158.0
1989.0     0.065    148.5
1990.0     0.049    133.1
1991.0     0.032    101.3
1992.0     0.023     22.1
1993.0     0.036    318.3
1994.0     0.054    293.2
1995.0     0.069    280.0
1996.0     0.083    271.4
1997.0     0.095    265.2
1998.0     0.107    260.4
1999.0     0.117    256.5
2000.0     0.127    253.2
2001.0     0.136    250.4
2002.0     0.145    247.9
2003.0     0.153    245.7
2004.0     0.160    243.7
2005.0     0.167    241.8
2006.0     0.174    240.1
2007.0     0.180    238.6
2008.0     0.185    237.1
2009.0     0.191    235.7
2010.0     0.196    234.4
2011.0     0.200    233.1
2012.0     0.205    231.9
2013.0     0.209    230.8
2014.0     0.213    229.7
2015.0     0.216    228.6
2016.0     0.220    227.6
2017.0     0.223    226.6
2018.0     0.225    225.6
2019.0     0.228    224.6
2020.0     0.230    223.7
2021.0     0.232    222.8
2022.0     0.234    221.9
2023.0     0.235    221.0
2024.0     0.237    220.1
2025.0     0.238    219.2
2026.0     0.239    218.4
2027.0     0.239    217.5
2028.0     0.240    216.7
2029.0     0.240    215.8
2030.0     0.240    214.9
2031.0     0.239    214.1
2032.0     0.239    213.2
2033.0     0.238    212.4
2034.0     0.237    211.5
2035.0     0.236    210.6
2036.0     0.235    209.7
2037.0     0.233    208.8
2038.0     0.231    207.9
2039.0     0.229    207.0
2040.0     0.227    206.1
2041.0     0.224    205.1
2042.0     0.221    204.1
2043.0     0.218    203.1
2044.0     0.215    202.0
2045.0     0.211    200.9
2046.0     0.207    199.8
2047.0     0.203    198.7
2048.0     0.198    197.4
2049.0     0.193    196.1
2050.0     0.188    194.8
2051.0     0.183    193.4
2052.0     0.177    191.8
2053.0     0.170    190.2
2054.0     0.163    188.4
2055.0     0.156    186.5
2056.0     0.149    184.4
2057.0     0.140    182.1
2058.0     0.132    179.4
2059.0     0.122    176.3
2060.0     0.112    172.8
2061.0     0.101    168.4

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.