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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:12:35

Orbital Elements for A1427AB

WDS:	A1427AB	WDS ID/Discoverer
P:	82.610	Orbital period (years)
a:	0.25	Semi-major axis (arcseconds)
i:	56.1	Inclination (degrees)
Ω:	70.4	Longitude of ascending node (degrees)
T:	2032.750	Epoch of periastron passage (year)
e:	0.879	Eccentricity
ω:	238.3	Longitude of periastron (degrees)
Start-Year:	1984.0	Year
End-Year:	2066.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1427AB

Position:	202015.22+392411.8	Epoch-2000 right ascension and declination
WDS-ID:	20203+3924	WDS designation
Discoverer Code:	A1427AB	Discover designation and components
ADS number:	13728	Aitken Double Star catalog
HD number:	193702	HD catalog number
Hipparcos number:	100268	Hipparcos catalog number
V1:	6.57	Magnitude of the primary
V2:	8.17	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A1427AB

WDS 6th Orbit including measures of A1427AB

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

Ephemeris of A1427AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.126    160.1
-------------------------
1984.0     0.341    107.8
1985.0     0.341    108.4
1986.0     0.340    109.0
1987.0     0.339    109.6
1988.0     0.338    110.3
1989.0     0.337    110.9
1990.0     0.335    111.5
1991.0     0.334    112.2
1992.0     0.331    112.8
1993.0     0.329    113.5
1994.0     0.326    114.2
1995.0     0.324    114.9
1996.0     0.321    115.6
1997.0     0.317    116.3
1998.0     0.314    117.0
1999.0     0.310    117.8
2000.0     0.306    118.5
2001.0     0.302    119.3
2002.0     0.297    120.1
2003.0     0.292    120.9
2004.0     0.287    121.8
2005.0     0.282    122.7
2006.0     0.277    123.6
2007.0     0.271    124.6
2008.0     0.265    125.6
2009.0     0.259    126.7
2010.0     0.253    127.8
2011.0     0.246    128.9
2012.0     0.239    130.2
2013.0     0.232    131.5
2014.0     0.225    132.9
2015.0     0.217    134.3
2016.0     0.209    135.9
2017.0     0.201    137.7
2018.0     0.192    139.5
2019.0     0.184    141.6
2020.0     0.175    143.9
2021.0     0.166    146.4
2022.0     0.156    149.2
2023.0     0.146    152.3
2024.0     0.136    155.9
2025.0     0.126    160.1
2026.0     0.116    165.1
2027.0     0.105    171.0
2028.0     0.095    178.3
2029.0     0.084    187.3
2030.0     0.073    199.0
2031.0     0.062    214.9
2032.0     0.046    239.9
2033.0     0.018    343.8
2034.0     0.061     56.6
2035.0     0.097     68.5
2036.0     0.126     74.4
2037.0     0.149     78.2
2038.0     0.170     81.1
2039.0     0.187     83.3
2040.0     0.203     85.2
2041.0     0.217     86.9
2042.0     0.230     88.3
2043.0     0.241     89.7
2044.0     0.252     90.8
2045.0     0.261     91.9
2046.0     0.270     93.0
2047.0     0.278     93.9
2048.0     0.286     94.8
2049.0     0.292     95.7
2050.0     0.299     96.5
2051.0     0.304     97.3
2052.0     0.309     98.1
2053.0     0.314     98.9
2054.0     0.318     99.6
2055.0     0.322    100.3
2056.0     0.326    101.0
2057.0     0.329    101.6
2058.0     0.332    102.3
2059.0     0.334    103.0
2060.0     0.336    103.6
2061.0     0.338    104.3
2062.0     0.339    104.9
2063.0     0.340    105.5
2064.0     0.341    106.1
2065.0     0.341    106.8

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.