19482+7016 STF 2603 (Tyl)

 
 
19h 48m 10.35s +70 16' 04.5" P.A. 20.00 sep 3.5 mag 4.01,6.87 Sp G7IIIb dist. 45.37 pc (148 l.y.)
 
 
Coord 2000 19482+7016 Discov num STF2603 Comp Coord arcsec 2000 19 48 10.35 +70 16 04.5
Date first 1823 Date last 2022 Obs 159
Pa first 355 Pa last 20 P.A. Now (θ) 20°
Sep first 2.6 Sep last 3.5 Sep. Now (ρ) 3.5"
Mag pri 4.01 Mag sec 6.87 delta mag (ΔM) 2.86 Spectral class G7IIIb (yellow)
Pri motion ra +079 Sec motion ra
Pri motion dec +039 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Tyl Var name NSV12465 Dra Constellation Draco SAO 9540
HIP 97433 Tycho2 4449-02652-1 Gaia DR2 2251191616253487360 HD 188119
HR 7582 GC 27471 ADS 13007 BD BD+69 1070
Bayer Epsilon Draconis Bayer name Eps Dra Flamsteed 63 Draconis Flamsteed name 63 Dra
Distance 45.37 Distance ly 148 Bayer greek ε Dra
Meaning red fish
 
 
ORBITAL ELEMENTS
 
 
Period (P)2753.3257y± 1292.0608 Periastron (T)1598.5654y± 561.9011 Semi-major axis (a)8.01058a± 4.07389
Eccentricity (e)0.83937± 0.13066 Inclination (i)70.932°± 9.569 Longitude of periastron (ω)111.258°± 28.09
Node (Ω)128.309°± 68.794 Notesn ReferenceIzm2019
Equinox Last observation2012 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 18.6 3.157
2001 18.8 3.159
2002 18.9 3.161
2003 19.1 3.163
2004 19.2 3.165
2005 19.4 3.167
2006 19.5 3.169
2007 19.7 3.171
2008 19.8 3.173
2009 20.0 3.175
2010 20.1 3.177
2011 20.3 3.180
2012 20.4 3.182
2013 20.6 3.184
2014 20.7 3.186
2015 20.9 3.188
2016 21.0 3.190
2017 21.2 3.192
2018 21.3 3.194
2019 21.5 3.196
2020 21.6 3.199
2021 21.7 3.201
2022 21.9 3.203
2023 22.0 3.205
2024 22.2 3.207
2025 22.3 3.210
2026 22.5 3.212
2027 22.6 3.214
2028 22.8 3.216
2029 22.9 3.219
2030 23.0 3.221


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



 
 


wds19482%2B7016a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic