19490+1909 AGC 11 AB

 
 
19h 48m 58.65s +19 08' 31.1" P.A. 174.00 sep 0.2 mag 5.64,6.04 Sp A1V dist. 78.19 pc (255.06 l.y.)
 
 
Coord 2000 19490+1909 Discov num AGC  11 Comp AB Coord arcsec 2000 19 48 58.65 +19 08 31.1
Date first 1875 Date last 2010 Obs 261
Pa first 137 Pa last 174.3 P.A. Now (θ) 141°
Sep first 0.4 Sep last 0.23 Sep. Now (ρ) 0.14"
Mag pri 5.64 Mag sec 6.04 delta mag (ΔM) 0.4 Spectral class A1V (white)
Pri motion ra +019 Sec motion ra
Pri motion dec +027 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
19490+1909 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 105298 19 48 59 +19 08 31 AGC 11 AB 2010 261 174 0.2 5.64 6.04 0.40 Y <===
Show Zet Sge 105298 19 48 59 +19 08 31 STF 2585 AB,C 2016 131 311 8.3 5.04 9.01 3.97
Show 105298 19 48 59 +19 08 31 STF 2585 AB,D 2005 10 246 76.0 5.04 11.00 5.96
Quadruple system
5 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Sagitta SAO 105298 HIP 97496 Tycho2 1623-02647-1
HD 187362 HR 7546 GC 27431 ADS 12973
BD BD+18 4254 Bayer Zeta Sagittae Bayer name Zet Sge Flamsteed 8 Sagittae
Flamsteed name 8 Sge Distance 78.19 Distance ly 255.06 Bayer greek ζ Sge
 
 
ORBITAL ELEMENTS
 
 
Period (P)8487.9d (23.24y)± 4.9 Periastron (T)44199.6m (1979.892y)± 5.9 Semi-major axis (a)0.13605a± 0.00044
Eccentricity (e)0.7948± 0.0019 Inclination (i)132.33°± 0.41 Longitude of periastron (ω)355.3°± 1
Node (Ω)340.97°± 0.68 Notesn ReferenceMut2010b
Equinox2000 Last observation2007 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 139.5 0.133
2001 130.6 0.098
2002 109.6 0.056
2003 4.5 0.027
2004 237.9 0.042
2005 204.2 0.083
2006 192.3 0.118
2007 185.6 0.148
2008 181.0 0.172
2009 177.5 0.192
2010 174.6 0.209
2011 172.0 0.222
2012 169.8 0.232
2013 167.6 0.238
2014 165.6 0.243
2015 163.6 0.244
2016 161.7 0.242
2017 159.6 0.238
2018 157.5 0.231
2019 155.2 0.220
2020 152.6 0.206
2021 149.6 0.189
2022 145.9 0.167
2023 141.0 0.140
2024 133.3 0.107
2025 117.2 0.067
2026 44.0 0.027
2027 257.7 0.034
2028 208.8 0.073
2029 194.4 0.110
2030 186.9 0.141


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



 
 


wds19490%2B1909a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic