20320+2548 STF 2695 (HD 195692)

 
 
20h 31m 58.19s +25° 48' 18.1" P.A. 257.00 sep 0.3 mag 6.58,8.75 Sp Am+A2 dist. 87.03 pc (283.89 l.y.)
 
 
Coord 2000 20320+2548 Discov num STF2695 Comp Coord arcsec 2000 20 31 58.19 +25 48 18.1
Date first 1830 Date last 2020 Obs 144
Pa first 79 Pa last 257.2 P.A. Now (θ) 259.4°
Sep first 0.8 Sep last 0.32 Sep. Now (ρ) 0.429"
Mag pri 6.58 Mag sec 8.75 delta mag (ΔM) 2.17 Spectral class Am+A2 (white/white)
Pri motion ra +035 Sec motion ra
Pri motion dec -016 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 195692 Constellation Vulpecula SAO 88808 HIP 101300
Tycho2 2161-00330-1 Gaia DR2 1831837091159294208 HD 195692 HR 7849
GC 28571 ADS 13964 BD BD+25 4272 Distance 87.03
Distance ly 283.89
 
 
ORBITAL ELEMENTS
 
 
Period (P)269y Periastron (T)2016.37y Semi-major axis (a)0.773a
Eccentricity (e)0.431 Inclination (i)84.1° Longitude of periastron (ω)174.1°
Node (Ω)77.4° Notesn ReferenceAlz2005a
Equinox2000 Last observation2004 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 246.8 0.247
2001 247.9 0.265
2002 248.9 0.282
2003 249.8 0.298
2004 250.6 0.314
2005 251.3 0.330
2006 251.9 0.344
2007 252.5 0.358
2008 253.1 0.371
2009 253.6 0.383
2010 254.1 0.394
2011 254.6 0.404
2012 255.0 0.413
2013 255.4 0.421
2014 255.9 0.427
2015 256.3 0.432
2016 256.6 0.436
2017 257.0 0.439
2018 257.4 0.441
2019 257.8 0.441
2020 258.2 0.440
2021 258.6 0.437
2022 259.0 0.434
2023 259.4 0.429
2024 259.8 0.423
2025 260.2 0.416
2026 260.6 0.408
2027 261.1 0.399
2028 261.6 0.389
2029 262.1 0.378
2030 262.6 0.366


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


 
  


wds20320%2B2548a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic