19039+2642 A  2992

 
 
19h 03m 51.17s +26 41' 38.1" P.A. 47.3 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)
47.3°
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
 
 
Precise pa
48.2
Precise sep
0.24
Constellation
Lyra
SAO
86758
HIP
93615
Tycho2
2130-00956-1
HD
337446
ADS
11998
BD
BD+26 3437
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 Grade3(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





wds19039%2B2642b.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
19039+2642 A 2992 1997 37 254 0.2 10.15 9.58 F8 NO 190351.17+264138.1
19039+2642 A 2992 2007 38 61 0.2 10.15 9.58 F8 NO 190351.17+264138.1
19039+2642 A 2992 2008 39 47 0.2 10.15 9.58 F8 NO 190351.17+264138.1
19039+2642 A 2992 2009 40 48 0.2 10.15 9.58 F8 NO 190351.17+264138.1

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