20202-3435 I  1416

 
 
20h 20m 14.47s -34 35' 06.6" P.A. 269.9 sep 0.06 mag 7.09,8.19 Sp F8V dist. 62.19 pc (202.86 l.y.)
 
 
Coord 2000
20202-3435
Discov num
I  1416
Comp
Coord arcsec 2000
20 20 14.47 -34 35 06.6
Date first
1925
Date last
2018
Obs
39
Pa first
213
Pa last
278
P.A. Now (θ)
269.9°
Sep first
0.3
Sep last
0.1
Sep. Now (ρ)
0.06"
Mag pri
7.09
Mag sec
8.19
delta mag (ΔM)
1.1
Spectral class
F8V (yellow-white)
Pri motion ra
+053
Sec motion ra
Pri motion dec
-060
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
277.9
Precise sep
0.088
Constellation
Sagittarius
SAO
212015
HIP
100266
Tycho2
7450-01687-1
Gaia DR2
78391882368
HD
193194
CD
CD-3414287
CP
CP-34 8654
Distance
62.19
Distance ly
202.86
last precise pa
277.9
last precise sep
0.088
 
 
ORBITAL ELEMENTS
 
 
Period (P)20.16y± 0.31 Periastron (T)2000.19y± 1.24 Semi-major axis (a)0.163a± 0.035
Eccentricity (e)0.9 Inclination (i)113.9°± 11.6 Longitude of periastron (ω)37.2°± 19.7
Node (Ω)140.1°± 3.2 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.021 168.5
2001 0.085 323.1
2002 0.145 316.7
2003 0.185 313.6
2004 0.213 311.5
2005 0.233 309.8
2006 0.247 308.4
2007 0.257 307.0
2008 0.261 305.8
2009 0.262 304.6
2010 0.259 303.3
2011 0.253 302.1
2012 0.243 300.7
2013 0.230 299.2
2014 0.213 297.5
2015 0.192 295.5
2016 0.167 292.8
2017 0.137 289.2
2018 0.102 283.3
2019 0.061 269.9
2020 0.022 197.4
2021 0.072 325.3
2022 0.137 317.3
2023 0.179 314.0
2024 0.209 311.8
2025 0.230 310.0
2026 0.245 308.6
2027 0.255 307.2
2028 0.261 306.0
2029 0.262 304.8
2030 0.260 303.5

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






wds20202-3435b.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
20202-3435 I 1416 1991 31 303 0.2 7.09 8.19 F8V NO 202014.47-343506.6
20202-3435 I 1416 2008 33 305 0.3 7.09 8.19 F8V NO 202014.47-343506.6
20202-3435 I 1416 2013 36 298 0.2 7.09 8.19 F8V NO 202014.47-343506.6
20202-3435 I 1416 2015 37 294 0.2 7.09 8.19 F8V O 202014.47-343506.6
20202-3435 I 1416 2017 38 285 0.1 7.09 8.19 F8V O 202014.47-343506.6

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