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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:43:48

Orbital Elements for MCA45

WDS:	MCA45	WDS ID/Discoverer
P:	47.546	Orbital period (years)
a:	0.255	Semi-major axis (arcseconds)
i:	82.3	Inclination (degrees)
Ω:	89.1	Longitude of ascending node (degrees)
T:	2027.680	Epoch of periastron passage (year)
e:	0.9404	Eccentricity
ω:	280.0	Longitude of periastron (degrees)
Start-Year:	2002.0	Year
End-Year:	2048.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MCA45

Position:	170933.28+404637.3	Epoch-2000 right ascension and declination
WDS-ID:	17096+4047	WDS designation
Discoverer Code:	MCA45	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	155410	HD catalog number
Hipparcos number:	83947	Hipparcos catalog number
V1:	5.08	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1991	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for MCA45

WDS 6th Orbit including measures of MCA45

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

Ephemeris of MCA45

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.110    259.2
-------------------------
2002.0     0.099    227.9
2003.0     0.104    230.1
2004.0     0.108    232.0
2005.0     0.113    233.9
2006.0     0.117    235.6
2007.0     0.121    237.2
2008.0     0.125    238.6
2009.0     0.129    240.0
2010.0     0.132    241.4
2011.0     0.135    242.6
2012.0     0.138    243.8
2013.0     0.140    245.0
2014.0     0.142    246.1
2015.0     0.144    247.2
2016.0     0.145    248.3
2017.0     0.146    249.3
2018.0     0.145    250.4
2019.0     0.145    251.4
2020.0     0.143    252.5
2021.0     0.140    253.6
2022.0     0.136    254.8
2023.0     0.130    256.1
2024.0     0.122    257.5
2025.0     0.110    259.2
2026.0     0.093    261.3
2027.0     0.061    265.1
2028.0     0.036     92.9
2029.0     0.055    102.9
2030.0     0.058    109.8
2031.0     0.058    116.5
2032.0     0.056    123.4
2033.0     0.054    130.8
2034.0     0.052    138.7
2035.0     0.051    147.1
2036.0     0.051    155.8
2037.0     0.051    164.5
2038.0     0.052    173.0
2039.0     0.054    181.0
2040.0     0.057    188.3
2041.0     0.060    194.9
2042.0     0.064    200.8
2043.0     0.068    205.9
2044.0     0.072    210.5
2045.0     0.077    214.5
2046.0     0.082    218.1
2047.0     0.087    221.2

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.