20012-3835 HDO 294

 
 
20h 01m 12.74s -38 35' 12.7" P.A. 36 sep 1.37 mag 8.08,9.11 Sp F3V dist. 68.49 pc (223.41 l.y.)
 
 
Coord 2000
20012-3835
Discov num
HDO 294
Comp
Coord arcsec 2000
20 01 12.74 -38 35 12.7
Date first
1897
Date last
2016
Obs
60
Pa first
120
Pa last
35
P.A. Now (θ)
36°
Sep first
1.5
Sep last
1.3
Sep. Now (ρ)
1.37"
Mag pri
8.08
Mag sec
9.11
delta mag (ΔM)
1.03
Spectral class
F3V (yellow-white)
Pri motion ra
+018
Sec motion ra
+018
Pri motion dec
-070
Sec motion dec
-070
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
34.6
Precise sep
1.25
Cdsa2 id
HDO 294
Constellation
Sagittarius
HIP
98556
Tycho2
7947-00530-1
HD
189386
Ra deg
20.020205555555556
De deg
-38.58686111111111
Distance
68.49
Distance ly
223.41
last precise pa
34.6
last precise sep
1.25
 
 
ORBITAL ELEMENTS
 
 
Period (P)4484.5y Periastron (T)1922.73y Semi-major axis (a)4.916a
Eccentricity (e)0.9474 Inclination (i)40.86° Longitude of periastron (ω)137.62°
Node (Ω)116.65° Note Grade5(1=Definitive, 9=Indet.)
Equinox1900 Last observation1974
label rho theta
2000 1.173 30.7
2001 1.184 31.0
2002 1.195 31.4
2003 1.206 31.7
2004 1.217 32.0
2005 1.228 32.3
2006 1.239 32.6
2007 1.250 32.9
2008 1.261 33.2
2009 1.271 33.5
2010 1.282 33.8
2011 1.293 34.1
2012 1.304 34.4
2013 1.314 34.7
2014 1.325 34.9
2015 1.336 35.2
2016 1.346 35.5
2017 1.357 35.7
2018 1.367 36.0
2019 1.378 36.2
2020 1.388 36.5
2021 1.399 36.7
2022 1.409 36.9
2023 1.419 37.2
2024 1.430 37.4
2025 1.440 37.6
2026 1.450 37.9
2027 1.460 38.1
2028 1.471 38.3
2029 1.481 38.5
2030 1.491 38.7

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

grafico orbita





wds20012-3835a.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
20012-3835 HDO 294 2002 52 30 1.2 8.08 9.11 F3V NOD 200112.74-383512.7
20012-3835 HDO 294 2008 53 30 1.2 8.08 9.11 F3V NOD 200112.74-383512.7
20012-3835 HDO 294 2010 54 29 1.2 8.08 9.11 F3V NOD 200112.74-383512.7
20012-3835 HDO 294 2013 57 31 1.2 8.08 9.11 F3V NO 200112.74-383512.7
20012-3835 HDO 294 2016 60 35 1.3 8.08 9.11 F3V NO 200112.74-383512.7

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