19039+2642 A  2992

 
 
19H 03M 51.17S +26 41' 38.1" P.A. 45.7 SEP 0.18 MAG 10.15,9.58 SP F8 DIST. 154.8 PC (504.96 L.Y.)
 
 
Coord 2000
19039+2642
Discov num
A  2992
Comp
Coord arcsec 2000
19 03 51.17 +26 41 38.1
Date first
1916
Date last
2009
Obs
40
Pa first
60
Pa last
48
P.A. Now (θ)
45.7°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.18"
Mag pri
10.15
Mag sec
9.58
delta mag (ΔM)
0.57
Spectral class
F8 (yellow-white)
Pri motion ra
-007
Sec motion ra
Pri motion dec
-084
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Lyra
HIP
93615
HD
337446
ADS
11998
Distance
154.8
Distance ly
504.96
last precise pa
48.2
last precise sep
0.24
 
 
ORBITAL ELEMENTS
 
 
Period (P)99y± 4 Periastron (T)1951.17y± 2 Semi-major axis (a)0.256a± 0.022
Eccentricity (e)0.835± 0.001 Inclination (i)114.5°± 4.5 Longitude of periastron (ω)255°± 1.5
Node (Ω)125.9°± 6 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.225 69.5
2001 0.223 68.4
2002 0.221 67.3
2003 0.219 66.2
2004 0.217 65.0
2005 0.214 63.9
2006 0.212 62.7
2007 0.209 61.4
2008 0.207 60.2
2009 0.204 58.9
2010 0.202 57.6
2011 0.199 56.2
2012 0.197 54.9
2013 0.194 53.4
2014 0.191 52.0
2015 0.189 50.5
2016 0.186 48.9
2017 0.183 47.3
2018 0.181 45.7
2019 0.178 44.0
2020 0.175 42.2
2021 0.173 40.4
2022 0.170 38.6
2023 0.167 36.7
2024 0.165 34.7
2025 0.162 32.7
2026 0.159 30.5
2027 0.157 28.4
2028 0.154 26.1
2029 0.152 23.8
2030 0.149 21.4

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic