19070+1104 HEI 568 (18 Aql)

 
 
19h 06m 58.60s +11° 04' 16.7" P.A. 243.00 sep 0.3 mag 5.44,6.39 Sp B8III dist. 214.13 pc (698.49 l.y.)
 
 
Coord 2000 19070+1104 Discov num HEI 568 Comp Coord arcsec 2000 19 06 58.60 +11 04 16.7
Date first 1987 Date last 2021 Obs 46
Pa first 320 Pa last 243.1 P.A. Now (θ) 243.1°
Sep first 0.3 Sep last 0.256 Sep. Now (ρ) 0.256"
Mag pri 5.44 Mag sec 6.39 delta mag (ΔM) 0.95 Spectral class B8III (blue-white)
Pri motion ra +005 Sec motion ra
Pri motion dec -026 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 18 Aql Var name Y Aql Constellation Aquila SAO 104488
HIP 93867 Tycho2 1044-01453-1 Gaia DR2 4312637517357693696 HD 178125
HR 7248 GC 26315 BD BD+10 3787 Flamsteed 18 Aquilae
Flamsteed name 18 Aql FK5 3525 Distance 214.13 Distance ly 698.49
 
 
ORBITAL ELEMENTS
 
 
Period (P)205.16y Periastron (T)2014.6y Semi-major axis (a)0.399a
Eccentricity (e)0.23 Inclination (i)134.3° Longitude of periastron (ω)201.4°
Node (Ω)94.5° Notesn ReferenceZir2010
Equinox2000 Last observation2008 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 288.3 0.313
2001 286.3 0.313
2002 284.4 0.313
2003 282.5 0.313
2004 280.5 0.313
2005 278.6 0.313
2006 276.7 0.312
2007 274.7 0.311
2008 272.7 0.310
2009 270.8 0.309
2010 268.8 0.307
2011 266.7 0.305
2012 264.7 0.303
2013 262.6 0.301
2014 260.5 0.298
2015 258.3 0.295
2016 256.1 0.292
2017 253.9 0.289
2018 251.6 0.286
2019 249.2 0.283
2020 246.8 0.279
2021 244.4 0.276
2022 241.9 0.272
2023 239.3 0.269
2024 236.6 0.265
2025 233.9 0.262
2026 231.1 0.259
2027 228.2 0.255
2028 225.2 0.252
2029 222.2 0.250
2030 219.1 0.247


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



 
 


wds19070%2B1104a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic