20267-4334 I  1420

 
 
20h 26m 44.38s -43 33' 56.4" P.A. 351.9 sep 0.39 mag 9.38,9.61 Sp K0V dist. 45.54 pc (148.55 l.y.)
 
 
Coord 2000
20267-4334
Discov num
I  1420
Comp
Coord arcsec 2000
20 26 44.38 -43 33 56.4
Date first
1925
Date last
2018
Obs
24
Pa first
344
Pa last
356
P.A. Now (θ)
351.9°
Sep first
0.7
Sep last
0.3
Sep. Now (ρ)
0.39"
Mag pri
9.38
Mag sec
9.61
delta mag (ΔM)
0.23
Spectral class
K0V (yellow-orange)
Pri motion ra
+120
Sec motion ra
Pri motion dec
-114
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
355.9
Precise sep
0.33
Constellation
Sagittarius
SAO
230207
HIP
100836
Tycho2
7961-01417-1
Gaia DR2
45511522048
HD
194327
CD
CD-4313984
CP
CP-43 9228
Distance
45.54
Distance ly
148.55
last precise pa
355.9
last precise sep
0.33
 
 
ORBITAL ELEMENTS
 
 
Period (P)81.5y Periastron (T)1980.4y Semi-major axis (a)0.457a
Eccentricity (e)0.353 Inclination (i)79.9° Longitude of periastron (ω)56.8°
Node (Ω)159.3° Note Grade4(1=Definitive, 9=Indet.)
Equinox Last observation1991
label rho theta
2000 0.501 339.6
2001 0.510 340.2
2002 0.517 340.8
2003 0.522 341.3
2004 0.525 341.9
2005 0.526 342.4
2006 0.525 343.0
2007 0.523 343.5
2008 0.519 344.1
2009 0.513 344.7
2010 0.506 345.2
2011 0.498 345.8
2012 0.489 346.5
2013 0.478 347.1
2014 0.466 347.8
2015 0.452 348.5
2016 0.438 349.3
2017 0.423 350.1
2018 0.407 351.0
2019 0.390 351.9
2020 0.372 353.0
2021 0.353 354.1
2022 0.334 355.4
2023 0.314 356.8
2024 0.294 358.5
2025 0.273 0.4
2026 0.252 2.6
2027 0.230 5.2
2028 0.209 8.3
2029 0.188 12.2
2030 0.167 17.0

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






wds20267-4334a.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
20267-4334 I 1420 1991 20 152 0.3 9.38 9.61 K0V OD 202644.38-433356.4
20267-4334 I 1420 2008 21 346 0.5 9.38 9.61 K0V OD 202644.38-433356.4
20267-4334 I 1420 2010 22 347 0.4 9.38 9.61 K0V OD 202644.38-433356.4
20267-4334 I 1420 2017 23 355 0.3 9.38 9.61 K0V O 202644.38-433356.4

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