20158+2749 CHR  94Aa,Ab

 
 
20h 15m 46.16s +27 48' 51.2" P.A. 192.7 sep 0.05 mag 4.80,6.50 Sp K3III dist. 103.84 pc (338.73 l.y.)
 
 
Coord 2000
20158+2749
Discov num
CHR  94
Comp
Aa,Ab
Coord arcsec 2000
20 15 46.16 +27 48 51.2
Date first
1985
Date last
2007
Obs
5
Pa first
90
Pa last
331
P.A. Now (θ)
192.7°
Sep first
0.1
Sep last
0.0
Sep. Now (ρ)
0.05"
Mag pri
4.80
Mag sec
6.50
delta mag (ΔM)
1.7
Spectral class
K3III (yellow-orange)
Pri motion ra
-034
Sec motion ra
Pri motion dec
+005
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
20158+2749 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 88428 20158+2749 CHR 94 Aa,Ab 1985 2007 5 193 0.0 4.80 6.50 1.70 Y <===
Show 23 Vul 88428 20158+2749 MCA 60 AB 1980 2004 27 148 0.1 4.80 6.94 2.14
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
330.7
Precise sep
0.047
Constellation
Vulpecula
SAO
88428
HIP
99874
Tycho2
2163-01794-1
Gaia DR2
16310522496
HD
192806
HR
7744
GC
28152
BD
BD+27 3666
Flamsteed
23 Vulpeculae
Flamsteed name
23 Vul
Distance
103.84
Distance ly
338.73
last precise pa
330.7
last precise sep
0.047
 
 
ORBITAL ELEMENTS
 
 
Period (P)25.33y Periastron (T)2009.56y Semi-major axis (a)0.111a
Eccentricity (e)0.4 Inclination (i)71.5° Longitude of periastron (ω)293.8°
Node (Ω)97.5° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2006
label rho theta
2000 0.110 259.9
2001 0.117 263.8
2002 0.121 267.4
2003 0.122 270.8
2004 0.118 274.3
2005 0.109 278.2
2006 0.094 283.2
2007 0.071 290.7
2008 0.041 308.0
2009 0.022 19.2
2010 0.046 76.5
2011 0.071 91.7
2012 0.083 100.2
2013 0.086 107.1
2014 0.082 114.3
2015 0.073 122.8
2016 0.063 133.9
2017 0.054 149.1
2018 0.047 169.5
2019 0.047 192.7
2020 0.053 213.5
2021 0.063 228.9
2022 0.075 239.8
2023 0.087 247.7
2024 0.098 253.7
2025 0.108 258.5
2026 0.115 262.6
2027 0.120 266.3
2028 0.122 269.7
2029 0.120 273.1
2030 0.113 276.9

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






wds20158%2B2749a.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
20158+2749 CHR 94 Aa,Ab 1991 3 157 0.1 4.52   K3III N 201546.16+274851.2
20158+2749 CHR 94 Aa,Ab 2006 4 107 0.1 4.52   K3III N 201546.16+274851.2
20158+2749 CHR 94 Aa,Ab 2007 5 331 0.0 4.52   K3III N D 201546.16+274851.2

If you need more information about this double, apply for a data request form to the WDS.