19190-3317 I   253AB

 
 
19h 18m 59.06s -33 16' 41.8" P.A. 141.7 sep 0.44 mag 8.77,7.25 Sp G1V dist. 55.1 pc (179.74 l.y.)
 
 
Coord 2000
19190-3317
Discov num
I   253
Comp
AB
Coord arcsec 2000
19 18 59.06 -33 16 41.8
Date first
1897
Date last
2016
Obs
42
Pa first
135
Pa last
140
P.A. Now (θ)
141.7°
Sep first
0.5
Sep last
0.5
Sep. Now (ρ)
0.44"
Mag pri
8.77
Mag sec
7.25
delta mag (ΔM)
1.52
Spectral class
G1V (yellow)
Pri motion ra
-016
Sec motion ra
-016
Pri motion dec
-131
Sec motion dec
-131
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
19190-3317 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 19190-3317 I 253 AB 1897 2016 42 142 0.4 8.77 7.25 1.52 Y <===
Show 19190-3317 TOK 624 AC 1980 1999 5 61 999.9 7.04 8.23 1.19
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
140.4
Precise sep
0.47
Constellation
Sagittarius
HIP
94926
HD
180702
Distance
55.1
Distance ly
179.74
last precise pa
140.4
last precise sep
0.47
 
 
ORBITAL ELEMENTS
 
 
Period (P)60y Periastron (T)1937.5y Semi-major axis (a)0.5101a
Eccentricity (e)0.78 Inclination (i)92.15° Longitude of periastron (ω)133.1°
Node (Ω)138.2° Note Grade4(1=Definitive, 9=Indet.)
Equinox1950 Last observation1952
label rho theta
2000 0.134 314.9
2001 0.106 312.3
2002 0.074 307.7
2003 0.040 295.0
2004 0.017 227.4
2005 0.042 165.4
2006 0.076 153.8
2007 0.111 149.4
2008 0.145 147.1
2009 0.179 145.7
2010 0.212 144.8
2011 0.244 144.1
2012 0.275 143.5
2013 0.305 143.1
2014 0.334 142.7
2015 0.362 142.4
2016 0.389 142.2
2017 0.415 141.9
2018 0.439 141.7
2019 0.463 141.6
2020 0.486 141.4
2021 0.508 141.2
2022 0.528 141.1
2023 0.547 141.0
2024 0.566 140.9
2025 0.583 140.7
2026 0.599 140.6
2027 0.614 140.5
2028 0.628 140.4
2029 0.640 140.4
2030 0.651 140.3

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

grafico orbita





wds19190-3317a.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
19190-3317 I 253 AB 2014 41 143 0.4 8.77 7.25 G1V O 191859.06-331641.8
19190-3317 I 253 AB 2016 42 140 0.5 8.77 7.25 G1V NO 191859.06-331641.8

If you need more information about this double, apply for a data request form to the WDS.