19563-3137 TOK 698 (Phi Aql)

 
 
19h 56m 16.66s -31° 36' 48.7" P.A. 239.00 sep 0.1 mag 8.30,9.70 Sp G3V dist. 67.29 pc (219.5 l.y.)
 
 
Coord 2000 19563-3137 Discov num TOK 698 Comp Coord arcsec 2000 19 56 16.66 -31 36 48.7
Date first 2015 Date last 2020 Obs 9
Pa first 59 Pa last 238.5 P.A. Now (θ) 238.5°
Sep first 0.1 Sep last 0.12 Sep. Now (ρ) 0.12"
Mag pri 8.30 Mag sec 9.70 delta mag (ΔM) 1.4 Spectral class G3V (yellow)
Pri motion ra -031 Sec motion ra
Pri motion dec -171 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Phi Aql Constellation Sagittarius SAO 211668 HIP 98103
Tycho2 7439-00300-1 Gaia DR2 6748261690744963840 HD 188432 HR 7610
GC 27604 BD BD+11 4055 CD CD-3117176 CP CP-31 6177
Bayer Phi Aquilae Bayer name Phi Aql FK5 3590 Distance 67.29
Distance ly 219.5 Bayer greek φ Aql
Bayer or Flamsteed indentifiers not always match the correct constellation because of procession and proper motion of the star. (Aql vs Sgr)
 
 
ORBITAL ELEMENTS
 
 
Period (P)13y Periastron (T)2016.29y Semi-major axis (a)0.1063a
Eccentricity (e)0.292 Inclination (i)90.8° Longitude of periastron (ω)44°
Node (Ω)59.8° Notesn ReferenceTok2020e
Equinox Last observation2019 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 63.8 0.023
2001 60.9 0.061
2002 60.1 0.081
2003 59.4 0.067
2004 55.1 0.013
2005 241.1 0.049
2006 240.2 0.095
2007 239.9 0.120
2008 239.6 0.126
2009 239.3 0.116
2010 238.9 0.093
2011 238.2 0.060
2012 234.8 0.020
2013 63.8 0.023
2014 60.9 0.061
2015 60.1 0.081
2016 59.4 0.067
2017 55.1 0.013
2018 241.1 0.049
2019 240.2 0.095
2020 239.9 0.120
2021 239.6 0.126
2022 239.3 0.116
2023 238.9 0.093
2024 238.2 0.060
2025 234.8 0.020
2026 63.8 0.023
2027 60.9 0.061
2028 60.1 0.081
2029 59.4 0.067
2030 55.1 0.013


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



 
 


wds19563-3137a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic