19581-4808 HDS2842

 
 
19h 58m 04.28s -48 08' 01.2" P.A. 55.3 sep 0.07 mag 8.61,10.78 Sp G0V dist. 53.79 pc (175.46 l.y.)
 
 
Coord 2000
19581-4808
Discov num
HDS2842
Comp
Coord arcsec 2000
19 58 04.28 -48 08 01.2
Date first
1991
Date last
2015
Obs
9
Pa first
92
Pa last
268
P.A. Now (θ)
55.3°
Sep first
0.3
Sep last
0.1
Sep. Now (ρ)
0.07"
Mag pri
8.61
Mag sec
10.78
delta mag (ΔM)
2.17
Spectral class
G0V (yellow)
Pri motion ra
+052
Sec motion ra
Pri motion dec
+016
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
268.3
Precise sep
0.057
Constellation
Telescopium
SAO
229955
HIP
98274
Tycho2
8395-00655-1
HD
188581
CD
CD-4813359
CP
CP-4810294
Distance
53.79
Distance ly
175.46
last precise pa
268.3
last precise sep
0.057
 
 
ORBITAL ELEMENTS
 
 
Period (P)35.28y± 2.48 Periastron (T)2016.036y± 0.065 Semi-major axis (a)0.2364a± 0.014
Eccentricity (e)0.738± 0.037 Inclination (i)70.2°± 2.2 Longitude of periastron (ω)60.6°± 4.1
Node (Ω)254.2°± 2.4 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.217 109.3
2001 0.204 112.2
2002 0.191 115.6
2003 0.177 119.5
2004 0.163 124.0
2005 0.149 129.4
2006 0.135 135.9
2007 0.122 143.9
2008 0.110 153.6
2009 0.101 165.3
2010 0.096 178.8
2011 0.094 193.3
2012 0.096 207.8
2013 0.099 221.4
2014 0.101 234.4
2015 0.089 248.4
2016 0.038 281.7
2017 0.067 55.3
2018 0.132 69.6
2019 0.176 75.1
2020 0.209 78.6
2021 0.232 81.3
2022 0.249 83.5
2023 0.262 85.5
2024 0.270 87.3
2025 0.275 89.1
2026 0.278 90.8
2027 0.278 92.5
2028 0.276 94.2
2029 0.273 95.9
2030 0.267 97.7

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

grafico orbita





wds19581-4808b.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
19581-4808 HDS2842 1991 1 92 0.3 8.61 10.78 G0V 195804.28-480801.2
19581-4808 HDS2842 2009 3 168 0.1 8.61 10.78 G0V 195804.28-480801.2
19581-4808 HDS2842 2014 6 254 0.1 8.61 10.78 G0V O 195804.28-480801.2
19581-4808 HDS2842 2015 9 268 0.1 8.61 10.78 G0V O 195804.28-480801.2

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