Double Star Calculator - Results

WARNING: Invalid or missing GAIA IDs

-- Image of STF-2084-taken with Equinox 120/900 APO --

WDS record for STF 2084

wds_id                       : 16413+3136
discoverer_code              : STF
discoverer_number            : 2084
discoverer_components        : 
date_first                   : 1826
date_last                    : 2023
num_of_obs                   : 863
pa_first                     : 23
pa_last                      : 88
sep_first                    : 0.9
sep_last                     : 1.5
mag_primary                  : 2.95
mag_secondary                : 5.4
spectral_type                : G1IV
primary_proper_motion_RA     : -463
primary_proper_motion_DEC    : 345
secondary_proper_motion_RA   : 
secondary_proper_motion_DEC  : 
dm_number                    : +31 2884
notes                        : NO
precise_coordinate           : 164117.16+313609.8

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 2084

WDS:	STF 2084	WDS ID/Discoverer
P:	34.464	Orbital period (years)
a:	1.32834	Semi-major axis (arcseconds)
i:	131.6	Inclination (degrees)
Ω:	50.601	Longitude of ascending node (degrees)
T:	1933.352	Epoch of periastron passage (year)
e:	0.46342	Eccentricity
ω:	113.177	Longitude of periastron (degrees)
Start-Year:	2008.0	Year
End-Year:	2042.0	Year
Epoch:	2025.99	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF 2084
Position:	164117.16+313609.8	Epoch-2000 right ascension and declination
WDS-ID:	16413+3136	WDS designation
Discoverer Code:	STF 2084	Discover designation and components
ADS number:	10157	Aitken Double Star catalog
HD number:	150680	HD catalog number
Hipparcos number:	81693	Hipparcos catalog number
V1:	2.95	Magnitude of the primary
V2:	5.40	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

Double Star Orbit for STF 2084

WDS 6th Orbit including measures of STF 2084

-- 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 2084

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.99    1.557     76.9
-------------------------
2008.0     1.075    194.8
2009.0     1.094    185.6
2010.0     1.108    176.6
2011.0     1.124    167.9
2012.0     1.142    159.4
2013.0     1.166    151.3
2014.0     1.194    143.5
2015.0     1.228    136.1
2016.0     1.265    129.1
2017.0     1.306    122.6
2018.0     1.348    116.4
2019.0     1.391    110.6
2020.0     1.431    105.2
2021.0     1.469    100.0
2022.0     1.503     95.1
2023.0     1.530     90.4
2024.0     1.549     85.8
2025.0     1.559     81.3
2026.0     1.557     76.9
2027.0     1.542     72.4
2028.0     1.511     67.7
2029.0     1.461     62.8
2030.0     1.389     57.5
2031.0     1.291     51.5
2032.0     1.162     44.3
2033.0     1.001     35.0
2034.0     0.809     21.6
2035.0     0.608    359.5
2036.0     0.486    321.0
2037.0     0.551    278.0
2038.0     0.716    250.3
2039.0     0.863    232.9
2040.0     0.964    220.0
2041.0     1.026    209.1

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.

Report Information

Double Star Calculator:		Version 1.0 ($Rev: 1734 $)
Report created:		2025-12-29 22:52:14 +0100