19474-0148 A 2993 AB (HD 186949)
19h 47m 23.94s -01° 48' 28.8" P.A. 230.00 sep 0.1 mag 9.06,9.09 Sp A2 dist. 116.55 pc (380.19 l.y.)
| Coord 2000 |
19474-0148 |
|
Discov num |
A 2993 |
|
Comp |
AB |
|
Coord arcsec 2000 |
19 47 23.94 -01 48 28.8 |
|
| Date first |
1915 |
|
Date last |
2021 |
|
Obs |
31 |
|
| Pa first |
160 |
|
Pa last |
229.5 |
|
P.A. Now (θ) |
232.4° |
|
| Sep first |
0.2 |
|
Sep last |
0.071 |
|
Sep. Now (ρ) |
0.099" |
|
| Mag pri |
9.06 |
|
Mag sec |
9.09 |
|
delta mag (ΔM) |
0.03 |
|
Spectral class |
A2 (white) |
|
| Pri motion ra |
+005 |
|
Sec motion ra |
|
|
| Pri motion dec |
-012 |
|
Sec motion dec |
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| Notes |
O
W
(Orbital solution, ) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 186949 |
|
Constellation |
Aquila |
|
SAO |
143800 |
|
HIP |
97367 |
|
| Tycho2 |
5146-02146-1 |
|
HD |
186949 |
|
ADS |
12924 |
|
BD |
BD-02 5115 |
|
| Distance |
116.55 |
|
Distance ly |
380.19 |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 19474-0148 A 2993 |
| coord_arcsec_2000 | 194723.94-014828.8 |
| Period (P) | 138.36y | |
Periastron (T) | 1984.83y | |
Semi-major axis (a) | 0.22a | |
| Eccentricity (e) | 0.075 | |
Inclination (i) | 116.1° | |
Longitude of periastron (ω) | 344.4° | |
| Node (Ω) | 327° | |
Notes | | |
Reference | Hrt2014b | |
| Equinox | 2000 | |
Last observation | 2009 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
312.9 |
0.186 |
| 2001 |
311.3 |
0.182 |
| 2002 |
309.6 |
0.178 |
| 2003 |
307.8 |
0.174 |
| 2004 |
305.9 |
0.169 |
| 2005 |
303.9 |
0.165 |
| 2006 |
301.8 |
0.160 |
| 2007 |
299.6 |
0.155 |
| 2008 |
297.2 |
0.149 |
| 2009 |
294.6 |
0.144 |
| 2010 |
291.9 |
0.139 |
| 2011 |
288.9 |
0.134 |
| 2012 |
285.7 |
0.128 |
| 2013 |
282.2 |
0.124 |
| 2014 |
278.4 |
0.119 |
| 2015 |
274.3 |
0.114 |
| 2016 |
269.9 |
0.110 |
| 2017 |
265.2 |
0.107 |
| 2018 |
260.2 |
0.104 |
| 2019 |
255.0 |
0.101 |
| 2020 |
249.5 |
0.099 |
| 2021 |
243.8 |
0.098 |
| 2022 |
238.1 |
0.098 |
| 2023 |
232.4 |
0.099 |
| 2024 |
226.8 |
0.100 |
| 2025 |
221.4 |
0.102 |
| 2026 |
216.2 |
0.105 |
| 2027 |
211.3 |
0.108 |
| 2028 |
206.8 |
0.112 |
| 2029 |
202.5 |
0.116 |
| 2030 |
198.6 |
0.121 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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