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Doubles in session


Current system
19398-2326
SEE 389
53 Sgr


Nearby doubles
10' : 19404-2320
OCC 802

24' : 19391-2304
ARA2265

29' : 19417-2338
OCC9189

36' : 19422-2339
B 2480

38' : 19379-2352
J 1764

43' : 19404-2244
UC 4002

45' : 19368-2311
ARA2264

52' : 19392-2234
UC 3997

54' : 19437-2335
UC 4013

58' : 19356-2319
SEE 384

69' : 19349-2323
B 2878

70' : 19420-2223
HDS2793

71' : 19449-2338
MTG 4

78' : 19345-2303
MRA 24

78' : 19455-2319
B 446AB

82' : 19372-2212
HTS 10AB

82' : 19399-2204
I 656

83' : 19440-2424
LDS4815

84' : 19449-2412
LDS4816

86' : 19453-2245
B 2879

95' : 19437-2443
KPP3114

98' : 19367-2453
BU 654

99' : 19350-2439
J 1851

102' : 19380-2147
SPM 37

104' : 19453-2436
TDS1009

109' : 19320-2335
B 2478AB



Selections
Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

19398-2326 SEE 389 (53 Sgr)

 
 
19h 39m 49.46s -23° 25' 39.4" P.A. 328.90 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
2018
 Obs
37
Pa first
332
 Pa last
332
 P.A. Now (θ)
328.9°
Sep first
0.2
 Sep last
0.1
 Sep. Now (ρ)
0.19"
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
331.8
 Precise sep
0.145
 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
 last precise pa
331.8
 last precise sep
0.145
 
 
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


 
 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		  
 
 
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
19398-2326 SEE 389 2018 37 332 0.1 6.80 7.51 A0V NO 193949.46-232539.4

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