20182+2912 A 1205 (HD 334100)

 
 
20h 18m 13.44s +29° 12' 15.0" P.A. 96.00 sep 1.2 mag 9.17,10.08 Sp M0 dist. 34.72 pc (113.26 l.y.)
 
 
Coord 2000 20182+2912 Discov num A  1205 Comp Coord arcsec 2000 20 18 13.44 +29 12 15.0
Date first 1905 Date last 2018 Obs 66
Pa first 346 Pa last 96 P.A. Now (θ) 96°
Sep first 0.3 Sep last 1.232 Sep. Now (ρ) 1.232"
Mag pri 9.17 Mag sec 10.08 delta mag (ΔM) 0.91 Spectral class M0 (red)
Pri motion ra -006 Sec motion ra -006
Pri motion dec -087 Sec motion dec -087
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 334100 Constellation Vulpecula SAO 88492 HIP 100079
Tycho2 2167-01052-1 Gaia DR2 1837182676179555712 HD 334100 ADS 13665
BD BD+28 3698 Distance 34.72 Distance ly 113.26
 
 
ORBITAL ELEMENTS
 
 
Period (P)493.2y Periastron (T)1970.78y Semi-major axis (a)1.942a
Eccentricity (e)0.913 Inclination (i)98.1° Longitude of periastron (ω)74°
Node (Ω)285.72° Notes ReferenceWSI2006b
Equinox2000 Last observation2005 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 98.8 1.038
2001 98.7 1.052
2002 98.6 1.066
2003 98.4 1.079
2004 98.3 1.091
2005 98.2 1.104
2006 98.0 1.115
2007 97.9 1.127
2008 97.8 1.138
2009 97.7 1.149
2010 97.5 1.160
2011 97.4 1.170
2012 97.3 1.180
2013 97.2 1.189
2014 97.1 1.199
2015 97.0 1.208
2016 96.9 1.217
2017 96.8 1.225
2018 96.7 1.234
2019 96.6 1.242
2020 96.5 1.250
2021 96.4 1.257
2022 96.3 1.265
2023 96.2 1.272
2024 96.1 1.279
2025 96.0 1.286
2026 95.9 1.293
2027 95.8 1.299
2028 95.7 1.305
2029 95.6 1.312
2030 95.5 1.317


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


 
  


wds20182%2B2912b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic