Double Star Calculator - Results

WARNING: Invalid or missing GAIA IDs

Measurements for STF 1821 AB

 
WDS ID      Discovr     Comp  #    Sep      PA       Epoch      Obs  Telescope     Camera    Note
-------------------------------------------------------------------------------------------------
14135+5147  STF 1821    AB    1    13,64"   235,7°   B2025.334  HWI  120/900 APO   ASI678MM

-- Image of STF-1821-AB-taken with Equinox 120/900 APO --

WDS record for STF 1821 AB

wds_id                       : 14135+5147
discoverer_code              : STF
discoverer_number            : 1821
discoverer_components        : AB
date_first                   : 1779
date_last                    : 2023
num_of_obs                   : 216
pa_first                     : 240
pa_last                      : 236
sep_first                    : 12.5
sep_last                     : 13.7
mag_primary                  : 4.53
mag_secondary                : 6.62
spectral_type                : A7V+F1V
primary_proper_motion_RA     : 60
primary_proper_motion_DEC    : -11
secondary_proper_motion_RA   : 65
secondary_proper_motion_DEC  : -4
dm_number                    : +52 1782
notes                        : NO
precise_coordinate           : 141329.00+514723.8

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 1821 AB

WDS:	STF 1821 AB	WDS ID/Discoverer
P:	10141.555	Orbital period (years)
a:	30.24041	Semi-major axis (arcseconds)
i:	93.267	Inclination (degrees)
Ω:	51.244	Longitude of ascending node (degrees)
T:	2902.040	Epoch of periastron passage (year)
e:	0.68651	Eccentricity
ω:	242.039	Longitude of periastron (degrees)
Start-Year:	-3045.0	Year
End-Year:	7095.0	Year
Epoch:	2025.99	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF 1821 AB
Position:	141329.00+514723.8	Epoch-2000 right ascension and declination
WDS-ID:	14135+5147	WDS designation
Discoverer Code:	STF 1821 AB	Discover designation and components
ADS number:	9173	Aitken Double Star catalog
HD number:	124675	HD catalog number
Hipparcos number:	69483	Hipparcos catalog number
V1:	4.53	Magnitude of the primary
V2:	6.62	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags

Double Star Orbit for STF 1821 AB

WDS 6th Orbit including measures of STF 1821 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 1821 AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.99   13.681    235.4
-------------------------
-3045.0    29.451     46.8
-2945.0    28.922     46.6
-2845.0    28.369     46.4
-2745.0    27.792     46.3
-2645.0    27.193     46.1
-2545.0    26.572     45.9
-2445.0    25.929     45.7
-2345.0    25.267     45.5
-2245.0    24.584     45.3
-2145.0    23.882     45.1
-2045.0    23.161     44.8
-1945.0    22.422     44.6
-1845.0    21.666     44.3
-1745.0    20.892     44.0
-1645.0    20.103     43.7
-1545.0    19.297     43.3
-1445.0    18.476     42.9
-1345.0    17.641     42.5
-1245.0    16.792     42.1
-1145.0    15.929     41.6
-1045.0    15.054     41.0
-945.0    14.168     40.4
-845.0    13.270     39.7
-745.0    12.362     38.8
-645.0    11.446     37.9
-545.0    10.522     36.8
-445.0     9.592     35.4
-345.0     8.658     33.8
-245.0     7.724     31.8
-145.0     6.793     29.2
-45.0      5.873     25.9
55.0       4.973     21.3
155.0      4.113     14.7
255.0      3.330      4.8
355.0      2.696    349.6
455.0      2.343    327.8
555.0      2.398    303.1
655.0      2.837    283.0
755.0      3.518    269.4
855.0      4.323    260.5
955.0      5.190    254.5
1055.0     6.085    250.2
1155.0     6.991    247.0
1255.0     7.895    244.6
1355.0     8.786    242.7
1455.0     9.656    241.1
1555.0    10.496    239.8
1655.0    11.296    238.6
1755.0    12.044    237.6
1855.0    12.725    236.8
1955.0    13.321    236.0
2055.0    13.809    235.2
2155.0    14.156    234.6
2255.0    14.320    233.9
2355.0    14.241    233.2
2455.0    13.835    232.6
2555.0    12.984    231.8
2655.0    11.530    230.9
2755.0     9.299    229.7
2855.0     6.195    227.4
2955.0     2.406    218.5
3055.0     1.865     69.4
3155.0     5.772     57.0
3255.0     9.361     54.5
3355.0    12.539     53.4
3455.0    15.327     52.7
3555.0    17.773     52.2
3655.0    19.922     51.8
3755.0    21.816     51.5
3855.0    23.490     51.3
3955.0    24.971     51.0
4055.0    26.283     50.8
4155.0    27.445     50.6
4255.0    28.473     50.5
4355.0    29.381     50.3
4455.0    30.180     50.2
4555.0    30.879     50.0
4655.0    31.487     49.9
4755.0    32.012     49.7
4855.0    32.459     49.6
4955.0    32.834     49.5
5055.0    33.142     49.4
5155.0    33.387     49.2
5255.0    33.573     49.1
5355.0    33.704     49.0
5455.0    33.783     48.9
5555.0    33.812     48.8
5655.0    33.795     48.6
5755.0    33.733     48.5
5855.0    33.628     48.4
5955.0    33.484     48.3
6055.0    33.301     48.2
6155.0    33.080     48.0
6255.0    32.825     47.9
6355.0    32.536     47.8
6455.0    32.214     47.7
6555.0    31.861     47.5
6655.0    31.477     47.4
6755.0    31.065     47.3
6855.0    30.625     47.1
6955.0    30.157     47.0
7055.0    29.663     46.8

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 22:53:12 +0100