20202-3435 I  1416

 
 
20h 20m 14.47s -34 35' 06.6" P.A. 332.90 sep 0.1 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
2019
Obs
40
Pa first
213
Pa last
253
P.A. Now (θ)
332.9°
Sep first
0.3
Sep last
0.0
Sep. Now (ρ)
0.05"
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
252.9
Precise sep
0.044
Constellation
Sagittarius
SAO
212015
HIP
100266
Tycho2
7450-01687-1
Gaia DR2
6696275578391882368
HD
193194
CD
CD-3414287
CP
CP-34 8654
Distance
62.19
Distance ly
202.86
last precise pa
252.9
last precise sep
0.044
 
 
ORBITAL ELEMENTS
 
 
Period (P)20.29y± 0.14 Periastron (T)2000.31y± 0.23 Semi-major axis (a)0.167a± 0.007
Eccentricity (e)0.887± 0.036 Inclination (i)112.9°± 2.5 Longitude of periastron (ω)38.5°± 5.8
Node (Ω)140°± 4.7 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2021
label rho theta
2000 0.025 178.1
2001 0.075 325.6
2002 0.141 317.7
2003 0.183 314.3
2004 0.212 312.0
2005 0.233 310.2
2006 0.248 308.7
2007 0.258 307.3
2008 0.263 306.0
2009 0.264 304.7
2010 0.261 303.4
2011 0.254 302.1
2012 0.244 300.6
2013 0.231 299.1
2014 0.213 297.3
2015 0.193 295.1
2016 0.168 292.4
2017 0.139 288.6
2018 0.105 282.5
2019 0.066 269.8
2020 0.028 217.4
2021 0.046 332.9
2022 0.125 319.1
2023 0.172 315.1
2024 0.205 312.6
2025 0.228 310.7
2026 0.245 309.1
2027 0.256 307.7
2028 0.262 306.3
2029 0.264 305.1
2030 0.262 303.8


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



 
 


wds20202-3435c.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
20202-3435 I 1416 2018 39 278 0.1 7.09 8.19 F8V O 202014.47-343506.6
20202-3435 I 1416 2019 40 253 0.0 7.09 8.19 F8V O 202014.47-343506.6

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