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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:55:40

Orbital Elements for HDS2570

WDS:	HDS2570	WDS ID/Discoverer
P:	85.000	Orbital period (years)
a:	0.158	Semi-major axis (arcseconds)
i:	73.0	Inclination (degrees)
Ω:	132.2	Longitude of ascending node (degrees)
T:	2009.870	Epoch of periastron passage (year)
e:	0.45	Eccentricity
ω:	149.6	Longitude of periastron (degrees)
Start-Year:	1983.0	Year
End-Year:	2067.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2570

Position:	181235.69+122336.9	Epoch-2000 right ascension and declination
WDS-ID:	18126+1224	WDS designation
Discoverer Code:	HDS2570	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	166976	HD catalog number
Hipparcos number:	89235	Hipparcos catalog number
V1:	8.04	Magnitude of the primary
V2:	8.88	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2019	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS2570

WDS 6th Orbit including measures of HDS2570

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

Ephemeris of HDS2570

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.047     29.5
-------------------------
1983.0     0.206    132.1
1984.0     0.203    132.8
1985.0     0.199    133.5
1986.0     0.195    134.2
1987.0     0.191    134.9
1988.0     0.185    135.7
1989.0     0.180    136.5
1990.0     0.173    137.4
1991.0     0.166    138.4
1992.0     0.159    139.4
1993.0     0.150    140.6
1994.0     0.142    141.9
1995.0     0.132    143.3
1996.0     0.122    145.1
1997.0     0.111    147.1
1998.0     0.100    149.6
1999.0     0.088    152.7
2000.0     0.076    156.8
2001.0     0.063    162.5
2002.0     0.051    171.1
2003.0     0.040    184.8
2004.0     0.032    207.1
2005.0     0.030    237.1
2006.0     0.036    263.3
2007.0     0.046    280.2
2008.0     0.057    290.7
2009.0     0.068    297.8
2010.0     0.077    303.1
2011.0     0.084    307.3
2012.0     0.089    310.9
2013.0     0.092    314.3
2014.0     0.093    317.5
2015.0     0.091    320.7
2016.0     0.088    324.1
2017.0     0.084    327.8
2018.0     0.079    332.0
2019.0     0.073    336.7
2020.0     0.068    342.3
2021.0     0.062    348.9
2022.0     0.056    356.9
2023.0     0.052      6.4
2024.0     0.049     17.4
2025.0     0.047     29.5
2026.0     0.048     41.8
2027.0     0.050     53.5
2028.0     0.054     63.8
2029.0     0.059     72.4
2030.0     0.065     79.6
2031.0     0.072     85.5
2032.0     0.079     90.3
2033.0     0.086     94.4
2034.0     0.094     97.8
2035.0     0.101    100.7
2036.0     0.109    103.2
2037.0     0.116    105.4
2038.0     0.123    107.3
2039.0     0.130    109.0
2040.0     0.137    110.5
2041.0     0.144    111.9
2042.0     0.150    113.2
2043.0     0.156    114.4
2044.0     0.162    115.5
2045.0     0.168    116.5
2046.0     0.173    117.5
2047.0     0.178    118.4
2048.0     0.183    119.2
2049.0     0.188    120.0
2050.0     0.192    120.8
2051.0     0.196    121.5
2052.0     0.199    122.2
2053.0     0.202    122.9
2054.0     0.205    123.6
2055.0     0.208    124.2
2056.0     0.210    124.8
2057.0     0.212    125.5
2058.0     0.213    126.1
2059.0     0.215    126.7
2060.0     0.215    127.3
2061.0     0.216    127.9
2062.0     0.216    128.5
2063.0     0.215    129.0
2064.0     0.214    129.6
2065.0     0.213    130.3
2066.0     0.211    130.9

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.