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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:08:57

Orbital Elements for A1658

WDS:	A1658	WDS ID/Discoverer
P:	88.100	Orbital period (years)
a:	0.224	Semi-major axis (arcseconds)
i:	169.8	Inclination (degrees)
Ω:	51.5	Longitude of ascending node (degrees)
T:	1991.600	Epoch of periastron passage (year)
e:	0.087	Eccentricity
ω:	228.2	Longitude of periastron (degrees)
Start-Year:	1981.0	Year
End-Year:	2069.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1658

Position:	194839.64+150332.4	Epoch-2000 right ascension and declination
WDS-ID:	19487+1504	WDS designation
Discoverer Code:	A1658	Discover designation and components
ADS number:	12961	Aitken Double Star catalog
HD number:	187283	HD catalog number
Hipparcos number:	97469	Hipparcos catalog number
V1:	8.30	Magnitude of the primary
V2:	8.74	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2000	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A1658

WDS 6th Orbit including measures of A1658

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

Ephemeris of A1658

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.239     40.6
-------------------------
1981.0     0.211    234.0
1982.0     0.210    229.4
1983.0     0.209    224.8
1984.0     0.208    220.2
1985.0     0.207    215.5
1986.0     0.206    210.8
1987.0     0.205    206.0
1988.0     0.204    201.2
1989.0     0.204    196.4
1990.0     0.203    191.6
1991.0     0.203    186.7
1992.0     0.203    181.8
1993.0     0.202    176.9
1994.0     0.202    172.0
1995.0     0.203    167.1
1996.0     0.203    162.2
1997.0     0.203    157.3
1998.0     0.204    152.5
1999.0     0.204    147.6
2000.0     0.205    142.8
2001.0     0.206    138.1
2002.0     0.207    133.4
2003.0     0.208    128.7
2004.0     0.210    124.1
2005.0     0.211    119.6
2006.0     0.213    115.1
2007.0     0.214    110.7
2008.0     0.216    106.3
2009.0     0.217    102.0
2010.0     0.219     97.8
2011.0     0.220     93.6
2012.0     0.222     89.5
2013.0     0.224     85.5
2014.0     0.225     81.5
2015.0     0.227     77.5
2016.0     0.228     73.7
2017.0     0.230     69.8
2018.0     0.231     66.1
2019.0     0.233     62.3
2020.0     0.234     58.6
2021.0     0.235     55.0
2022.0     0.236     51.3
2023.0     0.237     47.7
2024.0     0.238     44.2
2025.0     0.239     40.6
2026.0     0.239     37.1
2027.0     0.240     33.6
2028.0     0.241     30.1
2029.0     0.241     26.7
2030.0     0.241     23.2
2031.0     0.242     19.8
2032.0     0.242     16.3
2033.0     0.242     12.9
2034.0     0.242      9.4
2035.0     0.241      6.0
2036.0     0.241      2.5
2037.0     0.241    359.1
2038.0     0.241    355.6
2039.0     0.240    352.1
2040.0     0.240    348.6
2041.0     0.239    345.1
2042.0     0.238    341.6
2043.0     0.238    338.1
2044.0     0.237    334.5
2045.0     0.236    330.9
2046.0     0.235    327.3
2047.0     0.234    323.7
2048.0     0.234    320.0
2049.0     0.233    316.3
2050.0     0.232    312.6
2051.0     0.231    308.8
2052.0     0.230    305.0
2053.0     0.229    301.2
2054.0     0.228    297.3
2055.0     0.226    293.4
2056.0     0.225    289.5
2057.0     0.224    285.5
2058.0     0.223    281.5
2059.0     0.222    277.4
2060.0     0.221    273.3
2061.0     0.220    269.2
2062.0     0.219    265.0
2063.0     0.217    260.8
2064.0     0.216    256.5
2065.0     0.215    252.2
2066.0     0.214    247.8
2067.0     0.213    243.4
2068.0     0.212    238.9

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.