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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:44:53

Orbital Elements for COU315

WDS:	COU315	WDS ID/Discoverer
P:	90.500	Orbital period (years)
a:	0.506	Semi-major axis (arcseconds)
i:	100.4	Inclination (degrees)
Ω:	103.4	Longitude of ascending node (degrees)
T:	2012.830	Epoch of periastron passage (year)
e:	0.975	Eccentricity
ω:	89.3	Longitude of periastron (degrees)
Start-Year:	1980.0	Year
End-Year:	2070.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU315

Position:	171607.60+231536.9	Epoch-2000 right ascension and declination
WDS-ID:	17161+2316	WDS designation
Discoverer Code:	COU315	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	84468	Hipparcos catalog number
V1:	9.3	Magnitude of the primary
V2:	10.1	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2007	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for COU315

WDS 6th Orbit including measures of COU315

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

Ephemeris of COU315

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.160    240.4
-------------------------
1980.0     0.176    181.3
1981.0     0.175    180.0
1982.0     0.174    178.7
1983.0     0.174    177.3
1984.0     0.173    176.0
1985.0     0.172    174.6
1986.0     0.171    173.2
1987.0     0.170    171.8
1988.0     0.169    170.4
1989.0     0.168    169.0
1990.0     0.167    167.5
1991.0     0.166    166.0
1992.0     0.165    164.5
1993.0     0.164    163.0
1994.0     0.162    161.5
1995.0     0.161    159.9
1996.0     0.159    158.3
1997.0     0.158    156.7
1998.0     0.156    155.1
1999.0     0.154    153.4
2000.0     0.151    151.6
2001.0     0.149    149.8
2002.0     0.146    147.9
2003.0     0.143    146.0
2004.0     0.140    143.9
2005.0     0.136    141.8
2006.0     0.132    139.5
2007.0     0.126    137.0
2008.0     0.120    134.4
2009.0     0.113    131.3
2010.0     0.103    127.8
2011.0     0.090    123.5
2012.0     0.068    116.9
2013.0     0.033    280.5
2014.0     0.080    268.0
2015.0     0.099    262.9
2016.0     0.112    259.3
2017.0     0.122    256.3
2018.0     0.130    253.7
2019.0     0.136    251.4
2020.0     0.142    249.3
2021.0     0.146    247.3
2022.0     0.150    245.5
2023.0     0.154    243.7
2024.0     0.157    242.0
2025.0     0.160    240.4
2026.0     0.163    238.8
2027.0     0.165    237.3
2028.0     0.167    235.8
2029.0     0.169    234.4
2030.0     0.170    232.9
2031.0     0.172    231.5
2032.0     0.173    230.2
2033.0     0.174    228.8
2034.0     0.175    227.5
2035.0     0.176    226.2
2036.0     0.177    224.8
2037.0     0.178    223.6
2038.0     0.179    222.3
2039.0     0.179    221.0
2040.0     0.180    219.7
2041.0     0.180    218.5
2042.0     0.181    217.2
2043.0     0.181    216.0
2044.0     0.181    214.7
2045.0     0.181    213.5
2046.0     0.182    212.2
2047.0     0.182    211.0
2048.0     0.182    209.8
2049.0     0.182    208.5
2050.0     0.182    207.3
2051.0     0.182    206.1
2052.0     0.182    204.8
2053.0     0.182    203.6
2054.0     0.182    202.3
2055.0     0.181    201.1
2056.0     0.181    199.9
2057.0     0.181    198.6
2058.0     0.181    197.4
2059.0     0.181    196.1
2060.0     0.180    194.9
2061.0     0.180    193.6
2062.0     0.180    192.3
2063.0     0.179    191.1
2064.0     0.179    189.8
2065.0     0.178    188.5
2066.0     0.178    187.2
2067.0     0.177    185.9
2068.0     0.177    184.6
2069.0     0.176    183.3

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.