17251+3444 HU 922 Aa,Ab
17h 25m 03.29s +34° 43' 55.4" P.A. 30.00 sep 0.3 mag 10.21,11.03 Sp G0 dist. 98.04 pc (319.81 l.y.)
| Coord 2000 |
17251+3444 |
|
Discov num |
HU 922 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
17 25 03.29 +34 43 55.4 |
|
| Date first |
1904 |
|
Date last |
2016 |
|
Obs |
31 |
|
| Pa first |
0 |
|
Pa last |
30.4 |
|
P.A. Now (θ) |
30.4° |
|
| Sep first |
0.3 |
|
Sep last |
0.275 |
|
Sep. Now (ρ) |
0.275" |
|
| Mag pri |
10.21 |
|
Mag sec |
11.03 |
|
delta mag (ΔM) |
0.82 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
-003 |
|
Sec motion ra |
|
|
| Pri motion dec |
+005 |
|
Sec motion dec |
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|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
17251+3444 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
17 25 03 +34 43 55 |
HU 922 Aa,Ab |
2016 |
31 |
30 |
0.3 |
10.21 |
11.03 |
0.82 |
Y |
<=== |
| Show |
|
|
17 25 03 +34 43 55 |
SHY 719 AB |
2002 |
4 |
289 |
999.9 |
9.73 |
10.55 |
0.82 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hercules |
|
HIP |
85238 |
|
Tycho2 |
2613-01599-1 |
|
Gaia DR2 |
1335812417642326784 |
|
| ADS |
10542 |
|
BD |
BD+34 2962 |
|
Distance |
98.04 |
|
Distance ly |
319.81 |
|
ORBITAL ELEMENTS
| Period (P) | 132.4y | |
Periastron (T) | 1995.12y | |
Semi-major axis (a) | 0.299a | |
| Eccentricity (e) | 0.462 | |
Inclination (i) | 137.6° | |
Longitude of periastron (ω) | 58.1° | |
| Node (Ω) | 203.1° | |
Notes | n | |
Reference | FMR2016b | |
| Equinox | 2000 | |
Last observation | 2013 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
103.9 |
0.128 |
| 2001 |
94.7 |
0.134 |
| 2002 |
86.3 |
0.142 |
| 2003 |
78.9 |
0.151 |
| 2004 |
72.4 |
0.161 |
| 2005 |
66.6 |
0.172 |
| 2006 |
61.5 |
0.183 |
| 2007 |
57.0 |
0.193 |
| 2008 |
53.0 |
0.204 |
| 2009 |
49.4 |
0.215 |
| 2010 |
46.1 |
0.225 |
| 2011 |
43.1 |
0.235 |
| 2012 |
40.3 |
0.245 |
| 2013 |
37.8 |
0.254 |
| 2014 |
35.4 |
0.263 |
| 2015 |
33.2 |
0.272 |
| 2016 |
31.1 |
0.280 |
| 2017 |
29.1 |
0.288 |
| 2018 |
27.2 |
0.295 |
| 2019 |
25.4 |
0.302 |
| 2020 |
23.7 |
0.309 |
| 2021 |
22.1 |
0.315 |
| 2022 |
20.5 |
0.321 |
| 2023 |
19.0 |
0.326 |
| 2024 |
17.5 |
0.332 |
| 2025 |
16.1 |
0.336 |
| 2026 |
14.7 |
0.341 |
| 2027 |
13.4 |
0.345 |
| 2028 |
12.0 |
0.349 |
| 2029 |
10.7 |
0.353 |
| 2030 |
9.5 |
0.356 |
|
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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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