03003-1118 A 2611 (HD 18740)

 
 
03h 00m 20.37s -11° 17' 39.3" P.A. 263.00 sep 0.1 mag 9.70,9.70 Sp G5
 
 
Coord 2000 03003-1118 Discov num A  2611 Comp Coord arcsec 2000 03 00 20.37 -11 17 39.3
Date first 1913 Date last 2021 Obs 24
Pa first 0 Pa last 262.9 P.A. Now (θ) 272.5°
Sep first 0.2 Sep last 0.107 Sep. Now (ρ) 0.095"
Mag pri 9.70 Mag sec 9.70 delta mag (ΔM) 0 Spectral class G5 (yellow)
Pri motion ra +026 Sec motion ra
Pri motion dec -043 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 18740 Constellation Eridanus SAO 148713 Tycho2 5290-00699-1
Gaia DR2 5160670391765154688 HD 18740 ADS 2283
 
 
ORBITAL ELEMENTS
 
 
Period (P)75.28y Periastron (T)1954.11y Semi-major axis (a)0.14a
Eccentricity (e)0.577 Inclination (i)23.4° Longitude of periastron (ω)316.5°
Node (Ω)53.3° Notes ReferenceTok2017c
Equinox2000 Last observation2017 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 205.2 0.209
2001 206.8 0.207
2002 208.4 0.205
2003 210.1 0.203
2004 211.8 0.201
2005 213.6 0.198
2006 215.4 0.196
2007 217.3 0.192
2008 219.2 0.189
2009 221.2 0.185
2010 223.3 0.181
2011 225.5 0.177
2012 227.8 0.172
2013 230.3 0.167
2014 232.9 0.162
2015 235.7 0.156
2016 238.7 0.150
2017 242.0 0.143
2018 245.6 0.136
2019 249.6 0.128
2020 254.1 0.121
2021 259.3 0.112
2022 265.3 0.104
2023 272.5 0.095
2024 281.1 0.086
2025 291.8 0.077
2026 305.2 0.069
2027 321.9 0.062
2028 341.9 0.057
2029 3.7 0.056
2030 25.1 0.059


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



 
 


wds03003-1118e.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic