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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:13:29

Orbital Elements for I1420

WDS:	I1420	WDS ID/Discoverer
P:	77.810	Orbital period (years)
a:	0.446	Semi-major axis (arcseconds)
i:	79.3	Inclination (degrees)
Ω:	159.3	Longitude of ascending node (degrees)
T:	1981.040	Epoch of periastron passage (year)
e:	0.336	Eccentricity
ω:	61.6	Longitude of periastron (degrees)
Start-Year:	1987.0	Year
End-Year:	2063.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I1420

Position:	202644.38-433356.4	Epoch-2000 right ascension and declination
WDS-ID:	20267-4334	WDS designation
Discoverer Code:	I1420	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	194327	HD catalog number
Hipparcos number:	100836	Hipparcos catalog number
V1:	9.38	Magnitude of the primary
V2:	9.61	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for I1420

WDS 6th Orbit including measures of I1420

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

Ephemeris of I1420

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.193     12.3
-------------------------
1987.0     0.156    318.6
1988.0     0.197    323.8
1989.0     0.237    327.2
1990.0     0.274    329.7
1991.0     0.309    331.6
1992.0     0.340    333.1
1993.0     0.368    334.4
1994.0     0.394    335.5
1995.0     0.416    336.5
1996.0     0.435    337.4
1997.0     0.452    338.2
1998.0     0.465    339.0
1999.0     0.477    339.7
2000.0     0.485    340.4
2001.0     0.492    341.1
2002.0     0.496    341.7
2003.0     0.498    342.4
2004.0     0.498    343.0
2005.0     0.496    343.7
2006.0     0.492    344.3
2007.0     0.487    345.0
2008.0     0.480    345.7
2009.0     0.471    346.4
2010.0     0.461    347.1
2011.0     0.450    347.9
2012.0     0.437    348.7
2013.0     0.423    349.6
2014.0     0.408    350.5
2015.0     0.392    351.5
2016.0     0.375    352.6
2017.0     0.357    353.8
2018.0     0.338    355.2
2019.0     0.319    356.7
2020.0     0.299    358.4
2021.0     0.278      0.3
2022.0     0.257      2.5
2023.0     0.236      5.2
2024.0     0.214      8.4
2025.0     0.193     12.3
2026.0     0.172     17.1
2027.0     0.153     23.2
2028.0     0.135     31.0
2029.0     0.120     41.0
2030.0     0.110     53.2
2031.0     0.104     67.4
2032.0     0.106     82.1
2033.0     0.113     95.7
2034.0     0.126    107.0
2035.0     0.142    116.1
2036.0     0.160    123.1
2037.0     0.180    128.7
2038.0     0.200    133.2
2039.0     0.220    136.9
2040.0     0.241    139.9
2041.0     0.260    142.5
2042.0     0.278    144.7
2043.0     0.296    146.6
2044.0     0.311    148.4
2045.0     0.325    150.0
2046.0     0.337    151.4
2047.0     0.346    152.8
2048.0     0.352    154.1
2049.0     0.355    155.4
2050.0     0.355    156.7
2051.0     0.350    158.0
2052.0     0.341    159.3
2053.0     0.327    160.8
2054.0     0.308    162.4
2055.0     0.284    164.2
2056.0     0.255    166.4
2057.0     0.221    169.3
2058.0     0.183    173.2
2059.0     0.143    179.4
2060.0     0.102    190.5
2061.0     0.068    214.4
2062.0     0.058    260.0

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.