20577+2624 RAO 24 (HD 199598)

 
 
20h 57m 39.67s +26 24' 18.2" P.A. 88.00 sep 0.8 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 2018 Obs 7
Pa first 332 Pa last 88.4 P.A. Now (θ) 88.4°
Sep first 0.2 Sep last 0.794 Sep. Now (ρ) 0.794"
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
 
 
Name HD 199598 Constellation Vulpecula SAO 89320 HIP 103455
Tycho2 2180-01813-1 Gaia DR2 1844639838900425472 HD 199598 GC 29256
BD BD+25 4422 Distance 31.63 Distance ly 103.18
 
 
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 Notesn ReferenceRbr2017a
Equinox2000 Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 350.6 0.335
2001 337.9 0.272
2002 317.1 0.203
2003 275.2 0.139
2004 207.3 0.139
2005 165.5 0.205
2006 145.1 0.276
2007 132.9 0.342
2008 124.4 0.400
2009 118.1 0.453
2010 113.0 0.501
2011 108.7 0.545
2012 105.1 0.585
2013 101.9 0.623
2014 99.1 0.657
2015 96.5 0.690
2016 94.2 0.719
2017 92.0 0.747
2018 90.0 0.773
2019 88.2 0.797
2020 86.4 0.820
2021 84.7 0.840
2022 83.1 0.859
2023 81.6 0.877
2024 80.1 0.893
2025 78.7 0.908
2026 77.3 0.922
2027 75.9 0.934
2028 74.6 0.945
2029 73.4 0.955
2030 72.1 0.964


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



 
 


wds20577%2B2624a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic