17530-0755 STF 3128 AB (HD 162756)
17h 52m 58.64s -07° 55' 10.2" P.A. 50.00 sep 1.3 mag 7.82,9.95 Sp G0IV-V dist. 58.45 pc (190.66 l.y.)
| Coord 2000 |
17530-0755 |
|
Discov num |
STF3128 |
|
Comp |
AB |
|
Coord arcsec 2000 |
17 52 58.64 -07 55 10.2 |
|
| Date first |
1834 |
|
Date last |
2016 |
|
Obs |
30 |
|
| Pa first |
27 |
|
Pa last |
49.8 |
|
P.A. Now (θ) |
49.8° |
|
| Sep first |
1.5 |
|
Sep last |
1.268 |
|
Sep. Now (ρ) |
1.268" |
|
| Mag pri |
7.82 |
|
Mag sec |
9.95 |
|
delta mag (ΔM) |
2.13 |
|
Spectral class |
G0IV-V (yellow) |
|
| Pri motion ra |
-063 |
|
Sec motion ra |
-066 |
|
| Pri motion dec |
-255 |
|
Sec motion dec |
-255 |
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
rPM=0.011 (< 0.3, Physical double)
This double is physical.
17530-0755 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 162756 |
141935 |
17 52 59 -07 55 10 |
STF 3128 AB |
2016 |
30 |
50 |
1.3 |
7.82 |
9.95 |
2.13 |
Y |
<=== |
| Show |
|
141935 |
17 52 59 -07 55 10 |
STF 3128 AC |
2015 |
4 |
86 |
97.1 |
7.82 |
13.60 |
5.78 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 162756 |
|
Constellation |
Ophiuchus |
|
SAO |
141935 |
|
HIP |
87533 |
|
| Tycho2 |
5674-00028-1 |
|
Gaia DR2 |
4171536120668840320 |
|
HD |
162756 |
|
GC |
24300 |
|
| ADS |
10858 |
|
BD |
BD-07 4517 |
|
Distance |
58.45 |
|
Distance ly |
190.66 |
|
ORBITAL ELEMENTS
| Period (P) | 353.8939y | ± 59.0897 |
Periastron (T) | 1946.8899y | ± 1.5835 |
Semi-major axis (a) | 0.90295a | ± 0.09731 |
| Eccentricity (e) | 0.94042 | ± 0.01555 |
Inclination (i) | 158.548° | ± 13.845 |
Longitude of periastron (ω) | 160.838° | ± 47.693 |
| Node (Ω) | 19.871° | ± 43.216 |
Notes | n | |
Reference | Izm2019 | |
| Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
52.2 |
1.111 |
| 2001 |
52.0 |
1.122 |
| 2002 |
51.8 |
1.134 |
| 2003 |
51.6 |
1.145 |
| 2004 |
51.4 |
1.156 |
| 2005 |
51.2 |
1.167 |
| 2006 |
51.0 |
1.177 |
| 2007 |
50.8 |
1.188 |
| 2008 |
50.7 |
1.198 |
| 2009 |
50.5 |
1.209 |
| 2010 |
50.3 |
1.219 |
| 2011 |
50.1 |
1.229 |
| 2012 |
49.9 |
1.239 |
| 2013 |
49.8 |
1.248 |
| 2014 |
49.6 |
1.258 |
| 2015 |
49.4 |
1.268 |
| 2016 |
49.3 |
1.277 |
| 2017 |
49.1 |
1.286 |
| 2018 |
49.0 |
1.295 |
| 2019 |
48.8 |
1.304 |
| 2020 |
48.7 |
1.313 |
| 2021 |
48.5 |
1.322 |
| 2022 |
48.4 |
1.331 |
| 2023 |
48.2 |
1.339 |
| 2024 |
48.1 |
1.348 |
| 2025 |
47.9 |
1.356 |
| 2026 |
47.8 |
1.364 |
| 2027 |
47.6 |
1.372 |
| 2028 |
47.5 |
1.380 |
| 2029 |
47.4 |
1.388 |
| 2030 |
47.2 |
1.396 |
|
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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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