19531-1436 CHR  90 (V505 Sgr)

 
 
19h 53m 06.39s -14 36' 11.1" P.A. 183.90 sep 0.4 mag 9.25,6.61 Sp A2V+G5IV dist. 119.05 pc (388.34 l.y.)
 
 
Coord 2000
19531-1436
Discov num
CHR  90
Comp
Coord arcsec 2000
19 53 06.39 -14 36 11.1
Date first
1985
Date last
2018
Obs
26
Pa first
190
Pa last
186
P.A. Now (θ)
183.9°
Sep first
0.3
Sep last
0.4
Sep. Now (ρ)
0.41"
Mag pri
9.25
Mag sec
6.61
delta mag (ΔM)
2.64
Spectral class
A2V+G5IV (white/yellow)
Pri motion ra
-001
Sec motion ra
Pri motion dec
-058
Sec motion dec
Notes
N O (See Notes, Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
185.7
Precise sep
0.388
Var name
V505 Sgr
Constellation
Sagittarius
SAO
163080
HIP
97849
Tycho2
5737-00439-1
Gaia DR2
45986475904
HD
187949
HR
7571
BD
BD-14 5578
Distance
119.05
Distance ly
388.34
last precise pa
185.7
last precise sep
0.388
 
 
ORBITAL ELEMENTS
 
 
Period (P)343.2y Periastron (T)1998.85y Semi-major axis (a)0.678a
Eccentricity (e)0.716 Inclination (i)126.5° Longitude of periastron (ω)73.5°
Node (Ω)3.3° Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation2018
label rho theta
2000 0.117 283.5
2001 0.117 268.7
2002 0.124 254.9
2003 0.136 243.0
2004 0.151 233.2
2005 0.168 225.3
2006 0.186 218.9
2007 0.204 213.6
2008 0.223 209.2
2009 0.241 205.5
2010 0.259 202.3
2011 0.277 199.5
2012 0.293 197.0
2013 0.310 194.8
2014 0.325 192.8
2015 0.341 191.0
2016 0.355 189.4
2017 0.369 187.8
2018 0.383 186.4
2019 0.396 185.1
2020 0.409 183.9
2021 0.421 182.7
2022 0.433 181.6
2023 0.444 180.6
2024 0.455 179.6
2025 0.466 178.6
2026 0.476 177.7
2027 0.486 176.9
2028 0.496 176.0
2029 0.505 175.2
2030 0.514 174.5

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






wds19531-1436g.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
19531-1436 CHR 90 2006 18 216 0.2 9.25 6.61 A0V+F8IV NOD 195306.39-143611.1
19531-1436 CHR 90 2009 19 204 0.2 9.25 6.61 A0V+F8IV NOD 195306.39-143611.1
19531-1436 CHR 90 2010 24 200 0.3 9.25 6.61 A0V+F8IV NOD 195306.39-143611.1
19531-1436 CHR 90 2015 25 10 0.4 9.25 6.61 A0V+F8IV NO 195306.39-143611.1
19531-1436 CHR 90 2018 26 186 0.4 9.25 6.61 A0V+F8IV NO 195306.39-143611.1

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