19474-0148 A 2993 AB (HD 186949)

 
 
19h 47m 23.94s -01° 48' 28.8" P.A. 230.00 sep 0.1 mag 9.06,9.09 Sp A2 dist. 116.55 pc (380.19 l.y.)
 
 
Coord 2000 19474-0148 Discov num A  2993 Comp AB Coord arcsec 2000 19 47 23.94 -01 48 28.8
Date first 1915 Date last 2021 Obs 31
Pa first 160 Pa last 229.5 P.A. Now (θ) 232.4°
Sep first 0.2 Sep last 0.071 Sep. Now (ρ) 0.099"
Mag pri 9.06 Mag sec 9.09 delta mag (ΔM) 0.03 Spectral class A2 (white)
Pri motion ra +005 Sec motion ra
Pri motion dec -012 Sec motion dec
Notes O W (Orbital solution, )
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 186949 Constellation Aquila SAO 143800 HIP 97367
Tycho2 5146-02146-1 HD 186949 ADS 12924 BD BD-02 5115
Distance 116.55 Distance ly 380.19
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
Identifier19474-0148 A 2993
coord_arcsec_2000194723.94-014828.8
Period (P)138.36y Periastron (T)1984.83y Semi-major axis (a)0.22a
Eccentricity (e)0.075 Inclination (i)116.1° Longitude of periastron (ω)344.4°
Node (Ω)327° Notes ReferenceHrt2014b
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 312.9 0.186
2001 311.3 0.182
2002 309.6 0.178
2003 307.8 0.174
2004 305.9 0.169
2005 303.9 0.165
2006 301.8 0.160
2007 299.6 0.155
2008 297.2 0.149
2009 294.6 0.144
2010 291.9 0.139
2011 288.9 0.134
2012 285.7 0.128
2013 282.2 0.124
2014 278.4 0.119
2015 274.3 0.114
2016 269.9 0.110
2017 265.2 0.107
2018 260.2 0.104
2019 255.0 0.101
2020 249.5 0.099
2021 243.8 0.098
2022 238.1 0.098
2023 232.4 0.099
2024 226.8 0.100
2025 221.4 0.102
2026 216.2 0.105
2027 211.3 0.108
2028 206.8 0.112
2029 202.5 0.116
2030 198.6 0.121


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


 
  


wds19474-0148b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic