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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:43:58

Orbital Elements for HU169

WDS:	HU169	WDS ID/Discoverer
P:	79.080	Orbital period (years)
a:	0.223	Semi-major axis (arcseconds)
i:	124.4	Inclination (degrees)
Ω:	22.0	Longitude of ascending node (degrees)
T:	1992.000	Epoch of periastron passage (year)
e:	0.452	Eccentricity
ω:	61.8	Longitude of periastron (degrees)
Start-Year:	1986.0	Year
End-Year:	2064.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU169

Position:	171129.58-162930.8	Epoch-2000 right ascension and declination
WDS-ID:	17115-1630	WDS designation
Discoverer Code:	HU169	Discover designation and components
ADS number:	10385	Aitken Double Star catalog
HD number:	155317	HD catalog number
Hipparcos number:	84092	Hipparcos catalog number
V1:	8.61	Magnitude of the primary
V2:	8.12	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:	n	Flags

Double Star Orbit for HU169

WDS 6th Orbit including measures of HU169

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

Ephemeris of HU169

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.248    168.9
-------------------------
1986.0     0.152     26.2
1987.0     0.145     21.0
1988.0     0.135     15.2
1989.0     0.124      8.4
1990.0     0.111      0.2
1991.0     0.097    349.6
1992.0     0.084    335.5
1993.0     0.074    317.0
1994.0     0.071    295.1
1995.0     0.077    273.9
1996.0     0.088    256.9
1997.0     0.103    244.3
1998.0     0.120    235.0
1999.0     0.136    228.0
2000.0     0.152    222.5
2001.0     0.166    218.0
2002.0     0.180    214.2
2003.0     0.192    210.9
2004.0     0.203    208.0
2005.0     0.213    205.3
2006.0     0.222    202.9
2007.0     0.230    200.7
2008.0     0.237    198.6
2009.0     0.243    196.6
2010.0     0.248    194.7
2011.0     0.252    192.9
2012.0     0.255    191.1
2013.0     0.258    189.4
2014.0     0.260    187.7
2015.0     0.262    186.0
2016.0     0.262    184.4
2017.0     0.263    182.7
2018.0     0.262    181.1
2019.0     0.261    179.4
2020.0     0.260    177.7
2021.0     0.259    176.0
2022.0     0.257    174.3
2023.0     0.254    172.6
2024.0     0.251    170.8
2025.0     0.248    168.9
2026.0     0.245    167.1
2027.0     0.241    165.1
2028.0     0.237    163.1
2029.0     0.233    161.1
2030.0     0.229    159.0
2031.0     0.225    156.7
2032.0     0.220    154.4
2033.0     0.216    152.0
2034.0     0.211    149.5
2035.0     0.206    146.9
2036.0     0.202    144.2
2037.0     0.197    141.3
2038.0     0.193    138.3
2039.0     0.188    135.1
2040.0     0.184    131.9
2041.0     0.180    128.4
2042.0     0.177    124.8
2043.0     0.173    121.1
2044.0     0.170    117.2
2045.0     0.167    113.2
2046.0     0.165    109.1
2047.0     0.163    104.8
2048.0     0.162    100.5
2049.0     0.161     96.1
2050.0     0.160     91.7
2051.0     0.160     87.2
2052.0     0.160     82.8
2053.0     0.160     78.3
2054.0     0.161     73.9
2055.0     0.162     69.5
2056.0     0.163     65.2
2057.0     0.164     61.0
2058.0     0.165     56.8
2059.0     0.166     52.6
2060.0     0.166     48.4
2061.0     0.165     44.3
2062.0     0.164     40.1
2063.0     0.162     35.8

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.