20577+2624 RAO  24

 
 
20H 57M 39.67S +26 24' 18.2" P.A. 90 SEP 0.77 MAG 7.01,11.00 SP F9V DIST. 31.63 PC (103.18 L.Y.)
 
 
Coord 2000
20577+2624
Discov num
RAO  24
Comp
Coord arcsec 2000
20 57 39.67 +26 24 18.2
Date first
2001
Date last
2015
Obs
6
Pa first
332
Pa last
94
P.A. Now (θ)
90°
Sep first
0.2
Sep last
0.7
Sep. Now (ρ)
0.77"
Mag pri
7.01
Mag sec
11.00
delta mag (ΔM)
3.99
Spectral class
F9V (yellow-white)
Pri motion ra
+267
Sec motion ra
Pri motion dec
+092
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Vulpecula
HIP
103455
HD
199598
Distance
31.63
Distance ly
103.18
last precise pa
93.7
last precise sep
0.72
 
 
ORBITAL ELEMENTS
 
 
Period (P)68.2y± 1.5 Periastron (T)2003.4771y± 0.0006 Semi-major axis (a)0.62a± 0.025
Eccentricity (e)0.774± 0.004 Inclination (i)154.3°± 8.5 Longitude of periastron (ω)84.3°± 0.2
Node (Ω)326.7°± 2 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 0.335 350.6
2001 0.272 337.9
2002 0.203 317.1
2003 0.139 275.2
2004 0.139 207.3
2005 0.205 165.5
2006 0.276 145.1
2007 0.342 132.9
2008 0.400 124.4
2009 0.453 118.1
2010 0.501 113.0
2011 0.545 108.7
2012 0.585 105.1
2013 0.623 101.9
2014 0.657 99.1
2015 0.690 96.5
2016 0.719 94.2
2017 0.747 92.0
2018 0.773 90.0
2019 0.797 88.2
2020 0.820 86.4
2021 0.840 84.7
2022 0.859 83.1
2023 0.877 81.6
2024 0.893 80.1
2025 0.908 78.7
2026 0.922 77.3
2027 0.934 75.9
2028 0.945 74.6
2029 0.955 73.4
2030 0.964 72.1

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