Double Star Calculator - Orbit

Orbital Elements for STF2912AB

WDS:	STF2912AB	WDS ID/Discoverer
P:	123.530	Orbital period (years)
a:	0.714	Semi-major axis (arcseconds)
i:	89.94	Inclination (degrees)
Ω:	117.1	Longitude of ascending node (degrees)
T:	2035.380	Epoch of periastron passage (year)
e:	0.515	Eccentricity
ω:	214.6	Longitude of periastron (degrees)
Start-Year:	1963.235	Year
End-Year:	2086.765	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2912AB
Position:	222957.93+042554.1	Epoch-2000 right ascension and declination
WDS-ID:	22300+0426	WDS designation
Discoverer Code:	STF2912AB	Discover designation and components
ADS number:	15988	Aitken Double Star catalog
HD number:	213235	HD catalog number
Hipparcos number:	111062	Hipparcos catalog number
V1:	5.75	Magnitude of the primary
V2:	7.26	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2021b	Reference

Double Star Orbit for STF2912AB

WDS 6th Orbit including measures of STF2912AB

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

Legend:

Green plus signs:	Visual (micrometric) measures
Violet asterisks:	Photographic measures
Blue symbols:	Various interferometric techniques
Dot-dash line:	Indicates the line of nodes

Ephemeris of STF2912AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.350   297.05
--------------------------
1963.23    0.974   117.13
1964.23    0.969   117.13
1965.23    0.964   117.13
1966.23    0.958   117.13
1967.23    0.951   117.13
1968.23    0.943   117.13
1969.23    0.935   117.13
1970.23    0.926   117.14
1971.23    0.916   117.14
1972.23    0.906   117.14
1973.23    0.895   117.14
1974.23    0.883   117.14
1975.23    0.871   117.14
1976.23    0.858   117.15
1977.23    0.844   117.15
1978.23    0.830   117.15
1979.23    0.815   117.15
1980.23    0.799   117.15
1981.23    0.783   117.16
1982.23    0.766   117.16
1983.23    0.749   117.16
1984.23    0.731   117.16
1985.23    0.712   117.17
1986.23    0.693   117.17
1987.23    0.673   117.17
1988.23    0.653   117.17
1989.23    0.632   117.18
1990.23    0.611   117.18
1991.23    0.589   117.18
1992.23    0.567   117.19
1993.23    0.544   117.19
1994.23    0.520   117.20
1995.23    0.496   117.20
1996.23    0.472   117.21
1997.23    0.447   117.21
1998.23    0.422   117.22
1999.23    0.396   117.23
2000.23    0.370   117.24
2001.23    0.343   117.25
2002.23    0.316   117.26
2003.23    0.288   117.28
2004.23    0.260   117.29
2005.23    0.232   117.32
2006.23    0.204   117.34
2007.23    0.175   117.38
2008.23    0.145   117.43
2009.23    0.116   117.51
2010.23    0.086   117.65
2011.23    0.057   117.92
2012.23    0.027   118.80
2013.23    0.003   283.93
2014.23    0.033   295.80
2015.23    0.063   296.44
2016.23    0.093   296.66
2017.23    0.122   296.78
2018.23    0.151   296.85
2019.23    0.180   296.90
2020.23    0.208   296.94
2021.23    0.234   296.96
2022.23    0.260   296.99
2023.23    0.285   297.00
2024.23    0.307   297.02
2025.23    0.328   297.03
2026.23    0.346   297.04
2027.23    0.360   297.05
2028.23    0.372   297.06
2029.23    0.378   297.07
2030.23    0.380   297.08
2031.23    0.376   297.09
2032.23    0.365   297.10
2033.23    0.347   297.11
2034.23    0.322   297.12
2035.23    0.290   297.14
2036.23    0.252   297.16
2037.23    0.207   297.18
2038.23    0.159   297.22
2039.23    0.107   297.30
2040.23    0.053   297.54
2041.23    0.002   101.95
2042.23    0.056   116.65
2043.23    0.110   116.87
2044.23    0.163   116.94
2045.23    0.214   116.98
2046.23    0.264   117.00
2047.23    0.311   117.02
2048.23    0.357   117.03
2049.23    0.401   117.04
2050.23    0.443   117.05
2051.23    0.482   117.05
2052.23    0.520   117.06
2053.23    0.556   117.06
2054.23    0.590   117.07
2055.23    0.623   117.07
2056.23    0.653   117.07
2057.23    0.682   117.08
2058.23    0.709   117.08
2059.23    0.735   117.08
2060.23    0.759   117.08
2061.23    0.782   117.09
2062.23    0.803   117.09
2063.23    0.823   117.09
2064.23    0.842   117.09
2065.23    0.859   117.09
2066.23    0.875   117.10
2067.23    0.890   117.10
2068.23    0.903   117.10
2069.23    0.916   117.10
2070.23    0.927   117.10
2071.23    0.938   117.10
2072.23    0.947   117.11
2073.23    0.955   117.11
2074.23    0.962   117.11
2075.23    0.968   117.11
2076.23    0.973   117.11
2077.23    0.978   117.11
2078.23    0.981   117.11
2079.23    0.983   117.12
2080.23    0.985   117.12
2081.23    0.985   117.12
2082.23    0.985   117.12
2083.23    0.984   117.12
2084.23    0.982   117.12
2085.23    0.980   117.12
2086.23    0.976   117.12

Disclaimer

This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.

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.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 18:40:49