19398-2326 SEE 389 (53 Sgr)

 
 
19h 39m 49.46s -23 25' 39.4" P.A. 331.3 sep 0.15 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
2017
Obs
36
Pa first
332
Pa last
333
P.A. Now (θ)
331.3°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.15"
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
 
 
Precise pa
333
Precise sep
0.132
Name
53 Sgr
Constellation
Sagittarius
SAO
188407
HIP
96729
HD
185404
HR
7470
GC
27189
ADS
12741
Flamsteed
53 Sagittarii
Flamsteed name
53 Sgr
Distance
98.72
Distance ly
322.02
last precise pa
333
last precise sep
0.132
 
 
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 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.240 147.8
2001 0.237 147.4
2002 0.231 146.9
2003 0.222 146.5
2004 0.209 146.0
2005 0.193 145.4
2006 0.174 144.7
2007 0.153 143.9
2008 0.129 142.7
2009 0.103 141.0
2010 0.076 138.0
2011 0.047 131.6
2012 0.021 107.4
2013 0.020 10.6
2014 0.046 344.1
2015 0.074 337.4
2016 0.101 334.3
2017 0.126 332.5
2018 0.149 331.3
2019 0.168 330.3
2020 0.183 329.6
2021 0.194 328.9
2022 0.200 328.4
2023 0.201 327.8
2024 0.198 327.2
2025 0.190 326.6
2026 0.177 325.9
2027 0.160 325.1
2028 0.139 324.1
2029 0.116 322.6
2030 0.090 320.4

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

grafico orbita





wds19398-2326a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19398-2326 SEE 389 1991 29 333 0.1 6.80 7.51 A0V NO 193949.46-232539.4
19398-2326 SEE 389 2008 33 322 0.1 6.80 7.51 A0V NO 193949.46-232539.4
19398-2326 SEE 389 2014 33 337 0.1 6.80 7.51 A0V NO 193949.46-232539.4
19398-2326 SEE 389 2015 34 336 0.1 6.80 7.51 A0V NO 193949.46-232539.4
19398-2326 SEE 389 2017 36 333 0.1 6.80 7.51 A0V NO 193949.46-232539.4

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