03087-4413 HDS 398 (HD 19693)
03h 08m 39.51s -44° 13' 17.8" P.A. 89.00 sep 0.1 mag 9.44,9.70 Sp F7V dist. 155.28 pc (506.52 l.y.)
Coord 2000 |
03087-4413 |
|
Discov num |
HDS 398 |
|
Comp |
|
|
Coord arcsec 2000 |
03 08 39.51 -44 13 17.8 |
|
Date first |
1991 |
|
Date last |
2020 |
|
Obs |
7 |
|
Pa first |
253 |
|
Pa last |
88.7 |
|
P.A. Now (θ) |
88.7° |
|
Sep first |
0.1 |
|
Sep last |
0.107 |
|
Sep. Now (ρ) |
0.107" |
|
Mag pri |
9.44 |
|
Mag sec |
9.70 |
|
delta mag (ΔM) |
0.26 |
|
Spectral class |
F7V (yellow-white) |
|
Pri motion ra |
+020 |
|
Sec motion ra |
|
|
Pri motion dec |
+009 |
|
Sec motion dec |
|
|
Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 19693 |
|
Constellation |
Eridanus |
|
SAO |
216181 |
|
HIP |
14608 |
|
Tycho2 |
7567-00839-1 |
|
Gaia DR2 |
4754581401431666816 |
|
HD |
19693 |
|
CD |
CD-44 994 |
|
CP |
CP-44 333 |
|
Distance |
155.28 |
|
Distance ly |
506.52 |
|
ORBITAL ELEMENTS
Period (P) | 170y | |
Periastron (T) | 2003.37y | |
Semi-major axis (a) | 0.235a | |
Eccentricity (e) | 0.462 | |
Inclination (i) | 109.7° | |
Longitude of periastron (ω) | 39.8° | |
Node (Ω) | 243.1° | |
Notes | | |
Reference | Tok2020g | |
Equinox | 2000 | |
Last observation | 2018 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
236.8 |
0.124 |
2001 |
234.4 |
0.118 |
2002 |
231.7 |
0.111 |
2003 |
228.6 |
0.104 |
2004 |
225.1 |
0.096 |
2005 |
221.0 |
0.088 |
2006 |
215.9 |
0.079 |
2007 |
209.7 |
0.071 |
2008 |
201.8 |
0.063 |
2009 |
191.8 |
0.056 |
2010 |
179.4 |
0.051 |
2011 |
164.9 |
0.048 |
2012 |
149.8 |
0.048 |
2013 |
135.7 |
0.052 |
2014 |
123.8 |
0.057 |
2015 |
114.3 |
0.065 |
2016 |
106.9 |
0.073 |
2017 |
101.1 |
0.082 |
2018 |
96.4 |
0.092 |
2019 |
92.7 |
0.101 |
2020 |
89.6 |
0.111 |
2021 |
86.9 |
0.120 |
2022 |
84.7 |
0.130 |
2023 |
82.7 |
0.139 |
2024 |
81.0 |
0.148 |
2025 |
79.5 |
0.156 |
2026 |
78.2 |
0.165 |
2027 |
76.9 |
0.173 |
2028 |
75.8 |
0.181 |
2029 |
74.8 |
0.189 |
2030 |
73.9 |
0.196 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|