17433+2137 DUQ 1 Aa,Ab (HD 161198)
17h 43m 15.64s +21° 36' 33.1" P.A. 283.00 sep 0.2 mag 7.50, Sp G9V dist. 22.65 pc (73.88 l.y.)
| Coord 2000 |
17433+2137 |
|
Discov num |
DUQ 1 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
17 43 15.64 +21 36 33.1 |
|
| Date first |
1989 |
|
Date last |
2021 |
|
Obs |
10 |
|
| Pa first |
79 |
|
Pa last |
282.6 |
|
P.A. Now (θ) |
282.6° |
|
| Sep first |
0.3 |
|
Sep last |
0.172 |
|
Sep. Now (ρ) |
0.172" |
|
| Mag pri |
7.50 |
|
Mag sec |
|
|
delta mag (ΔM) |
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Spectral class |
G9V (yellow) |
|
| Pri motion ra |
-123 |
|
Sec motion ra |
|
|
| Pri motion dec |
-620 |
|
Sec motion dec |
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|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
17433+2137 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 161198 |
85357 |
17 43 16 +21 36 33 |
DUQ 1 Aa,Ab |
2021 |
10 |
283 |
0.2 |
7.50 |
|
|
Y |
<=== |
| Show |
|
|
17 43 16 +21 36 33 |
ALP 31 AB |
2016 |
4 |
189 |
23.0 |
7.50 |
15.00 |
7.50 |
|
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Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 161198 |
|
Constellation |
Hercules |
|
SAO |
85357 |
|
HIP |
86722 |
|
| Tycho2 |
1563-03551-1 |
|
HD |
161198 |
|
GC |
24055 |
|
GL |
Gl 692.1 |
|
| BD |
BD+21 3198 |
|
Distance |
22.65 |
|
Distance ly |
73.88 |
|
ORBITAL ELEMENTS
| Period (P) | 2558.4d (7y) | ± 10.4 |
Periastron (T) | 49422.53d (1994.19y) | ± 0.1 |
Semi-major axis (a) | 0.1737a | ± 0.0084 |
| Eccentricity (e) | 0.936 | ± 0.0007 |
Inclination (i) | 42.8° | ± 3.7 |
Longitude of periastron (ω) | 129.6° | ± 0.6 |
| Node (Ω) | 309.2° | ± 1.5 |
Notes | | |
Reference | Duq1996 | |
| Equinox | | |
Last observation | 1994 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000-01-01 |
280.9 |
0.213 |
| 2001-01-01 |
301.8 |
0.074 |
| 2002-01-01 |
246.4 |
0.145 |
| 2003-01-01 |
257.9 |
0.230 |
| 2004-01-01 |
264.1 |
0.274 |
| 2005-01-01 |
269.1 |
0.287 |
| 2006-01-01 |
274.2 |
0.270 |
| 2007-01-01 |
280.9 |
0.214 |
| 2008-01-01 |
301.5 |
0.076 |
| 2009-01-01 |
246.3 |
0.144 |
| 2010-01-01 |
257.8 |
0.229 |
| 2011-01-01 |
264.1 |
0.274 |
| 2012-01-01 |
269.1 |
0.287 |
| 2013-01-01 |
274.1 |
0.270 |
| 2014-01-01 |
280.8 |
0.214 |
| 2015-01-01 |
301.2 |
0.077 |
| 2016-01-01 |
246.2 |
0.144 |
| 2017-01-01 |
257.8 |
0.229 |
| 2018-01-01 |
264.1 |
0.274 |
| 2019-01-01 |
269.1 |
0.287 |
| 2020-01-01 |
274.1 |
0.270 |
| 2021-01-01 |
280.8 |
0.214 |
| 2022-01-01 |
300.8 |
0.078 |
| 2023-01-01 |
246.1 |
0.143 |
| 2024-01-01 |
257.8 |
0.229 |
| 2025-01-01 |
264.0 |
0.274 |
| 2026-01-01 |
269.0 |
0.287 |
| 2027-01-01 |
274.1 |
0.270 |
| 2028-01-01 |
280.8 |
0.215 |
| 2029-01-01 |
300.5 |
0.079 |
| 2030-01-01 |
246.0 |
0.142 |
|
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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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