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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:06:31

Orbital Elements for MCA55AA,AC

WDS:	MCA55AA,AC	WDS ID/Discoverer
P:	68.610	Orbital period (years)
a:	0.558	Semi-major axis (arcseconds)
i:	114.7	Inclination (degrees)
Ω:	255.3	Longitude of ascending node (degrees)
T:	2015.400	Epoch of periastron passage (year)
e:	0.7869	Eccentricity
ω:	264.8	Longitude of periastron (degrees)
Start-Year:	1991.0	Year
End-Year:	2059.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MCA55AA,AC

Position:	193043.29+275734.9	Epoch-2000 right ascension and declination
WDS-ID:	19307+2758	WDS designation
Discoverer Code:	MCA55AA,AC	Discover designation and components
ADS number:	12540	Aitken Double Star catalog
HD number:	183912	HD catalog number
Hipparcos number:	95947	Hipparcos catalog number
V1:	3.37	Magnitude of the primary
V2:	5.16	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 MCA55AA,AC

WDS 6th Orbit including measures of MCA55AA,AC

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

Ephemeris of MCA55AA,AC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.431    229.0
-------------------------
1991.0     0.400    152.9
1992.0     0.399    150.3
1993.0     0.397    147.6
1994.0     0.396    144.9
1995.0     0.394    142.2
1996.0     0.393    139.5
1997.0     0.392    136.8
1998.0     0.390    134.0
1999.0     0.389    131.2
2000.0     0.387    128.4
2001.0     0.385    125.6
2002.0     0.383    122.8
2003.0     0.380    119.9
2004.0     0.377    116.9
2005.0     0.372    113.9
2006.0     0.367    110.8
2007.0     0.360    107.6
2008.0     0.351    104.3
2009.0     0.339    100.8
2010.0     0.324     96.9
2011.0     0.303     92.6
2012.0     0.275     87.6
2013.0     0.235     81.2
2014.0     0.174     71.1
2015.0     0.081     42.3
2016.0     0.088    286.5
2017.0     0.184    261.3
2018.0     0.252    252.5
2019.0     0.301    247.0
2020.0     0.337    242.8
2021.0     0.365    239.4
2022.0     0.387    236.5
2023.0     0.405    233.8
2024.0     0.419    231.3
2025.0     0.431    229.0
2026.0     0.440    226.7
2027.0     0.447    224.6
2028.0     0.453    222.5
2029.0     0.457    220.5
2030.0     0.460    218.5
2031.0     0.463    216.5
2032.0     0.464    214.5
2033.0     0.465    212.6
2034.0     0.465    210.6
2035.0     0.464    208.7
2036.0     0.463    206.7
2037.0     0.461    204.8
2038.0     0.459    202.8
2039.0     0.457    200.8
2040.0     0.455    198.7
2041.0     0.452    196.7
2042.0     0.449    194.6
2043.0     0.446    192.5
2044.0     0.443    190.4
2045.0     0.440    188.2
2046.0     0.436    186.0
2047.0     0.433    183.8
2048.0     0.430    181.5
2049.0     0.427    179.2
2050.0     0.424    176.9
2051.0     0.421    174.5
2052.0     0.418    172.1
2053.0     0.415    169.7
2054.0     0.412    167.2
2055.0     0.410    164.8
2056.0     0.408    162.2
2057.0     0.405    159.7
2058.0     0.403    157.1

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.