Double Star Calculator - Results

WARNING: Invalid or missing GAIA IDs

Measurements for STF 1523 AB

 
WDS ID      Discovr     Comp  #    Sep      PA       Epoch      Obs  Telescope     Camera    Note
--------------------------------------------------------------------------------------------------
11182+3132  STF 1523    AB    1    2.75"    135.0°   B2025.325  HWI  120/900 APO   ASI678MM
11182+3132  STF 1523    AB    1    2.67"    133.0°   B2026.311  HWI  120/900 APO   ASI678MM  3x

-- Image of STF-1523-AB-taken with Equinox 120/900 APO --

WDS record for STF 1523 AB

wds_id                       : 11182+3132
discoverer_code              : STF
discoverer_number            : 1523
discoverer_components        : AB
date_first                   : 1819
date_last                    : 2024
num_of_obs                   : 1670
pa_first                     : 285
pa_last                      : 137
sep_first                    : 2.6
sep_last                     : 3.3
mag_primary                  : 4.33
mag_secondary                : 4.8
spectral_type                : F9V+G9V
primary_proper_motion_RA     : -454
primary_proper_motion_DEC    : -591
secondary_proper_motion_RA   : -454
secondary_proper_motion_DEC  : -591
dm_number                    : +32 2132
notes                        : NO
precise_coordinate           : 111810.90+313145.0
                             : 11:18:10.90 +31:31:45.0

WDS Notes:
----------
N: Notes found in WDSNOT MEMO of WDS
O: Orbit described in WDSNOT MEMO and has entry in Orbit Catalog

Orbital Elements for STF 1523 AB

WDS:	STF 1523 AB	WDS ID/Discoverer
P:	59.890	Orbital period (years)
a:	2.50442	Semi-major axis (arcseconds)
i:	122.187	Inclination (degrees)
Ω:	100.939	Longitude of ascending node (degrees)
T:	1935.170	Epoch of periastron passage (year)
e:	0.40432	Eccentricity
ω:	126.964	Longitude of periastron (degrees)
Start-Year:	1996.0	Year
End-Year:	2054.0	Year
Epoch:	2026.31	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF 1523 AB
Position:	111810.90+313145.0	Epoch-2000 right ascension and declination
WDS-ID:	11182+3132	WDS designation
Discoverer Code:	STF 1523 AB	Discover designation and components
ADS number:	8119	Aitken Double Star catalog
HD number:	98231	HD catalog number
Hipparcos number:	55203	Hipparcos catalog number
V1:	4.33	Magnitude of the primary
V2:	4.80	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	1	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Izm2019	Reference

Double Star Orbit for STF 1523 AB

WDS 6th Orbit including measures of STF 1523 AB

-- 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 STF 1523 AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.31    2.691    132.8
-------------------------
1996.0     1.279    304.0
1997.0     1.456    294.1
1998.0     1.600    286.3
1999.0     1.704    279.6
2000.0     1.770    273.5
2001.0     1.803    267.8
2002.0     1.809    262.1
2003.0     1.795    256.5
2004.0     1.767    250.7
2005.0     1.732    244.7
2006.0     1.694    238.4
2007.0     1.658    231.9
2008.0     1.629    225.1
2009.0     1.608    218.1
2010.0     1.599    210.9
2011.0     1.604    203.8
2012.0     1.622    196.7
2013.0     1.655    189.8
2014.0     1.701    183.3
2015.0     1.758    177.1
2016.0     1.825    171.4
2017.0     1.901    166.1
2018.0     1.982    161.2
2019.0     2.068    156.8
2020.0     2.156    152.6
2021.0     2.246    148.8
2022.0     2.335    145.3
2023.0     2.423    142.1
2024.0     2.509    139.1
2025.0     2.591    136.2
2026.0     2.668    133.6
2027.0     2.741    131.1
2028.0     2.807    128.7
2029.0     2.867    126.4
2030.0     2.919    124.2
2031.0     2.963    122.1
2032.0     2.998    120.0
2033.0     3.023    118.0
2034.0     3.038    116.0
2035.0     3.042    114.0
2036.0     3.034    112.0
2037.0     3.014    110.0
2038.0     2.979    108.0
2039.0     2.930    105.9
2040.0     2.866    103.7
2041.0     2.785    101.4
2042.0     2.687     98.9
2043.0     2.570     96.3
2044.0     2.433     93.3
2045.0     2.277     90.0
2046.0     2.100     86.2
2047.0     1.903     81.6
2048.0     1.687     75.9
2049.0     1.460     68.4
2050.0     1.230     58.2
2051.0     1.021     43.5
2052.0     0.875     22.6
2053.0     0.843    357.0

Observation Date:

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 makes use of data from the European Space Agency (ESA) mission Gaia, processed by the Gaia Data Processing and Analysis Consortium (DPAC). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Additionally, it incorporates data from the Washington Double Star Catalog, maintained at the U.S. Naval Observatory, and makes use of the Aladin Sky Atlas developed at CDS, Strasbourg Observatory, France. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France.

Report Information

Double Star Calculator:		Version 1.0 ($Rev: 2309 $)
Report created:		2026-05-10 17:33:49 +0200