20248-1943 HDS2919

 
 
20h 24m 46.66s -19 42' 35.9" P.A. 224.60 sep 0.1 mag 9.93,10.72 Sp K3V dist. 54.53 pc (177.88 l.y.)
 
 
Coord 2000
20248-1943
Discov num
HDS2919
Comp
Coord arcsec 2000
20 24 46.66 -19 42 35.9
Date first
1991
Date last
2019
Obs
11
Pa first
66
Pa last
215
P.A. Now (θ)
224.6°
Sep first
0.4
Sep last
0.1
Sep. Now (ρ)
0.11"
Mag pri
9.93
Mag sec
10.72
delta mag (ΔM)
0.79
Spectral class
K3V (yellow-orange)
Pri motion ra
+043
Sec motion ra
Pri motion dec
-011
Sec motion dec
Notes
O (Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
214.9
Precise sep
0.092
Constellation
Capricornus
SAO
163540
HIP
100685
Tycho2
6337-01640-1
Gaia DR2
29861972096
HD
194169
BD
BD-20 5925
Distance
54.53
Distance ly
177.88
last precise pa
214.9
last precise sep
0.092
 
 
ORBITAL ELEMENTS
 
 
Period (P)65y Periastron (T)2020.9y± 0.75 Semi-major axis (a)0.3243a± 0.0086
Eccentricity (e)0.474± 0.062 Inclination (i)60.9°± 2.5 Longitude of periastron (ω)311.6°± 3.6
Node (Ω)269.7°± 2.9 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.412 79.3
2001 0.409 80.8
2002 0.405 82.3
2003 0.399 83.9
2004 0.392 85.5
2005 0.383 87.1
2006 0.372 88.9
2007 0.360 90.7
2008 0.345 92.7
2009 0.328 94.9
2010 0.309 97.4
2011 0.287 100.2
2012 0.263 103.5
2013 0.236 107.5
2014 0.207 112.6
2015 0.176 119.4
2016 0.144 129.2
2017 0.115 144.3
2018 0.094 167.9
2019 0.091 198.2
2020 0.107 224.6
2021 0.132 242.5
2022 0.157 254.5
2023 0.178 263.3
2024 0.193 270.6
2025 0.202 277.0
2026 0.206 282.9
2027 0.206 288.8
2028 0.204 294.7
2029 0.200 300.8
2030 0.195 307.2

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






wds20248-1943a.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
20248-1943 HDS2919 1997 3 79 0.4 9.93 10.72 K3V D 202446.66-194235.9
20248-1943 HDS2919 2007 4 92 0.3 9.93 10.72 K3V D 202446.66-194235.9
20248-1943 HDS2919 2013 6 111 0.2 9.93 10.72 K3V 202446.66-194235.9
20248-1943 HDS2919 2014 7 119 0.2 9.93 10.72 K3V 202446.66-194235.9
20248-1943 HDS2919 2015 8 125 0.2 9.93 10.72 K3V 202446.66-194235.9
20248-1943 HDS2919 2017 9 155 0.1 9.93 10.72 K3V O 202446.66-194235.9
20248-1943 HDS2919 2018 10 179 0.1 9.93 10.72 K3V O 202446.66-194235.9
20248-1943 HDS2919 2019 11 215 0.1 9.93 10.72 K3V O 202446.66-194235.9

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