19040-3804 I 1391 (HD 176891)

 
 
19h 03m 58.43s -38° 04' 02.0" P.A. 124.00 sep 0.3 mag 9.91,9.71 Sp G5V dist. 120.48 pc (393.01 l.y.)
 
 
Coord 2000 19040-3804 Discov num I  1391 Comp Coord arcsec 2000 19 03 58.43 -38 04 02.0
Date first 1926 Date last 2023 Obs 25
Pa first 114 Pa last 123.5 P.A. Now (θ) 128.5° (calc)
Sep first 0.5 Sep last 0.273 Sep. Now (ρ) 0.278" (calc)
Mag pri 9.91 Mag sec 9.71 delta mag (ΔM) 0.2 Spectral class G5V (yellow)
Pri motion ra +005 Sec motion ra
Pri motion dec -038 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 176891 Constellation Corona Austrina SAO 210867 HIP 93625
Tycho2 7917-00132-1 Gaia DR2 6718711044440095232 HD 176891 CD CD-3813306
CP CP-38 7691 Distance 120.48 Distance ly 393.01
 
 
ORBITAL ELEMENTS
 
 
Period (P)48.75y± 0.72 Periastron (T)2003.88y± 0.59 Semi-major axis (a)0.1869a± 0.0022
Eccentricity (e)0.505± 0.028 Inclination (i)52.3°± 2.6 Longitude of periastron (ω)194.7°± 6.1
Node (Ω)123.4°± 3 Notes ReferenceTok2024c
Equinox Last observation Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 250.7 0.089
2001 267.5 0.091
2002 283.4 0.094
2003 298.6 0.094
2004 314.5 0.090
2005 333.1 0.081
2006 356.2 0.073
2007 22.3 0.073
2008 45.8 0.081
2009 63.3 0.097
2010 75.6 0.115
2011 84.4 0.134
2012 91.1 0.152
2013 96.4 0.170
2014 100.7 0.186
2015 104.3 0.201
2016 107.5 0.215
2017 110.3 0.227
2018 112.8 0.237
2019 115.1 0.247
2020 117.3 0.255
2021 119.3 0.262
2022 121.3 0.267
2023 123.1 0.272
2024 125.0 0.275
2025 126.7 0.277
2026 128.5 0.278
2027 130.3 0.277
2028 132.1 0.276
2029 133.9 0.274
2030 135.7 0.270
2031 137.6 0.266
2032 139.6 0.260
2033 141.6 0.253
2034 143.8 0.246
2035 146.1 0.237
2036 148.7 0.228
2037 151.4 0.217
2038 154.4 0.206
2039 157.8 0.194
2040 161.7 0.181
2041 166.2 0.168
2042 171.5 0.154
2043 177.8 0.140
2044 185.6 0.126
2045 195.2 0.113
2046 207.1 0.102
2047 221.4 0.094
2048 237.8 0.089
2049 254.9 0.089
2050 271.6 0.092


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds19040-3804d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic