19398-2326 SEE 389 (53 Sgr)

 
 
19h 39m 49.46s -23 25' 39.4" P.A. 330.00 sep 0.2 mag 6.80,7.51 Sp A0V dist. 98.72 pc (322.02 l.y.)
 
 
Coord 2000 19398-2326 Discov num SEE 389 Comp Coord arcsec 2000 19 39 49.46 -23 25 39.4
Date first 1897 Date last 2021 Obs 38
Pa first 332 Pa last 330 P.A. Now (θ) 327.8°
Sep first 0.2 Sep last 0.179 Sep. Now (ρ) 0.201"
Mag pri 6.80 Mag sec 7.51 delta mag (ΔM) 0.71 Spectral class A0V (white)
Pri motion ra +006 Sec motion ra
Pri motion dec -037 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 53 Sgr Constellation Sagittarius SAO 188407 HIP 96729
Tycho2 6889-02260-1 Gaia DR2 6768670963020310656 HD 185404 HR 7470
GC 27189 ADS 12741 CD CD-2315618 CP CP-23 7543
Flamsteed 53 Sagittarii Flamsteed name 53 Sgr Distance 98.72 Distance ly 322.02
 
 
ORBITAL ELEMENTS
 
 
Period (P)46.2y± 0.1 Periastron (T)1976.63y± 0.6 Semi-major axis (a)0.221a± 0.001
Eccentricity (e)0.088± 0.007 Inclination (i)93.5°± 0.2 Longitude of periastron (ω)0.4°± 4.7
Node (Ω)327.9°± 0.3 Notesn ReferenceTok2015c
Equinox2000 Last observation2014 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 147.8 0.240
2001 147.4 0.237
2002 146.9 0.231
2003 146.5 0.222
2004 146.0 0.209
2005 145.4 0.193
2006 144.7 0.174
2007 143.9 0.153
2008 142.7 0.129
2009 141.0 0.103
2010 138.0 0.076
2011 131.6 0.047
2012 107.4 0.021
2013 10.6 0.020
2014 344.1 0.046
2015 337.4 0.074
2016 334.3 0.101
2017 332.5 0.126
2018 331.3 0.149
2019 330.3 0.168
2020 329.6 0.183
2021 328.9 0.194
2022 328.4 0.200
2023 327.8 0.201
2024 327.2 0.198
2025 326.6 0.190
2026 325.9 0.177
2027 325.1 0.160
2028 324.1 0.139
2029 322.6 0.116
2030 320.4 0.090


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds19398-2326a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic