20048+0109 TOK 699 (HD 190412)
20h 04m 46.61s +01° 09' 21.6" P.A. 267.00 sep 0.2 mag 7.70,11.60 Sp G5 dist. 38.26 pc (124.8 l.y.)
| Coord 2000 |
20048+0109 |
|
Discov num |
TOK 699 |
|
Comp |
|
|
Coord arcsec 2000 |
20 04 46.61 +01 09 21.6 |
|
| Date first |
2015 |
|
Date last |
2021 |
|
Obs |
14 |
|
| Pa first |
318 |
|
Pa last |
266.6 |
|
P.A. Now (θ) |
266.6° |
|
| Sep first |
0.2 |
|
Sep last |
0.154 |
|
Sep. Now (ρ) |
0.154" |
|
| Mag pri |
7.70 |
|
Mag sec |
11.60 |
|
delta mag (ΔM) |
3.9 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+011 |
|
Sec motion ra |
|
|
| Pri motion dec |
-038 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 190412 |
|
Constellation |
Aquila |
|
SAO |
125417 |
|
HIP |
98878 |
|
| Tycho2 |
0494-00788-1 |
|
Gaia DR2 |
4237555510387302400 |
|
HD |
190412 |
|
BD |
BD+00 4408 |
|
| Distance |
38.26 |
|
Distance ly |
124.8 |
|
ORBITAL ELEMENTS
| Period (P) | 7.446y | ± 0.025 |
Periastron (T) | 2018.701y | ± 0.034 |
Semi-major axis (a) | 0.15a | ± 0.003 |
| Eccentricity (e) | 0.202 | ± 0.009 |
Inclination (i) | 32.3° | ± 3 |
Longitude of periastron (ω) | 239.3° | ± 3 |
| Node (Ω) | 247.7° | ± 2.8 |
Notes | | |
Reference | Tok2020i | |
| Equinox | 2000 | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
299.6 |
0.161 |
| 2001 |
337.7 |
0.147 |
| 2002 |
21.5 |
0.141 |
| 2003 |
69.7 |
0.130 |
| 2004 |
138.3 |
0.103 |
| 2005 |
211.3 |
0.130 |
| 2006 |
252.4 |
0.163 |
| 2007 |
284.7 |
0.167 |
| 2008 |
319.8 |
0.153 |
| 2009 |
1.5 |
0.143 |
| 2010 |
47.3 |
0.137 |
| 2011 |
103.5 |
0.113 |
| 2012 |
183.4 |
0.111 |
| 2013 |
236.4 |
0.152 |
| 2014 |
270.4 |
0.168 |
| 2015 |
303.4 |
0.160 |
| 2016 |
342.2 |
0.146 |
| 2017 |
26.5 |
0.140 |
| 2018 |
75.6 |
0.127 |
| 2019 |
147.5 |
0.103 |
| 2020 |
216.8 |
0.135 |
| 2021 |
256.1 |
0.165 |
| 2022 |
288.2 |
0.166 |
| 2023 |
324.0 |
0.152 |
| 2024 |
6.3 |
0.142 |
| 2025 |
52.5 |
0.136 |
| 2026 |
111.3 |
0.110 |
| 2027 |
191.0 |
0.115 |
| 2028 |
240.5 |
0.155 |
| 2029 |
273.9 |
0.168 |
| 2030 |
307.2 |
0.158 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
