18075+1940 STT 524 (HD 165886)
18h 07m 29.52s +19° 39' 59.1" P.A. 206.00 sep 0.5 mag 7.89,8.87 Sp A3V dist. 225.73 pc (736.33 l.y.)
| Coord 2000 |
18075+1940 |
|
Discov num |
STT 524 |
|
Comp |
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|
Coord arcsec 2000 |
18 07 29.52 +19 39 59.1 |
|
| Date first |
1853 |
|
Date last |
2018 |
|
Obs |
74 |
|
| Pa first |
85 |
|
Pa last |
205.8 |
|
P.A. Now (θ) |
205.8° |
|
| Sep first |
0.3 |
|
Sep last |
0.471 |
|
Sep. Now (ρ) |
0.471" |
|
| Mag pri |
7.89 |
|
Mag sec |
8.87 |
|
delta mag (ΔM) |
0.98 |
|
Spectral class |
A3V (white) |
|
| Pri motion ra |
+006 |
|
Sec motion ra |
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| Pri motion dec |
+000 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 165886 |
|
Constellation |
Hercules |
|
SAO |
103403 |
|
HIP |
88791 |
|
| Tycho2 |
1562-01105-1 |
|
Gaia DR2 |
4527485044312091392 |
|
HD |
165886 |
|
ADS |
11080 |
|
| BD |
BD+19 3533 |
|
Distance |
225.73 |
|
Distance ly |
736.33 |
|
ORBITAL ELEMENTS
| Period (P) | 686y | |
Periastron (T) | 1946.3y | |
Semi-major axis (a) | 0.584a | |
| Eccentricity (e) | 0.672 | |
Inclination (i) | 129.7° | |
Longitude of periastron (ω) | 57.8° | |
| Node (Ω) | 24.2° | |
Notes | | |
Reference | Hrt2000c | |
| Equinox | 2000 | |
Last observation | 1997 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
213.7 |
0.394 |
| 2001 |
213.2 |
0.399 |
| 2002 |
212.7 |
0.404 |
| 2003 |
212.1 |
0.409 |
| 2004 |
211.6 |
0.415 |
| 2005 |
211.2 |
0.420 |
| 2006 |
210.7 |
0.425 |
| 2007 |
210.2 |
0.430 |
| 2008 |
209.8 |
0.435 |
| 2009 |
209.3 |
0.440 |
| 2010 |
208.9 |
0.444 |
| 2011 |
208.5 |
0.449 |
| 2012 |
208.1 |
0.454 |
| 2013 |
207.6 |
0.458 |
| 2014 |
207.2 |
0.463 |
| 2015 |
206.9 |
0.467 |
| 2016 |
206.5 |
0.472 |
| 2017 |
206.1 |
0.476 |
| 2018 |
205.7 |
0.481 |
| 2019 |
205.4 |
0.485 |
| 2020 |
205.0 |
0.489 |
| 2021 |
204.7 |
0.493 |
| 2022 |
204.3 |
0.498 |
| 2023 |
204.0 |
0.502 |
| 2024 |
203.6 |
0.506 |
| 2025 |
203.3 |
0.510 |
| 2026 |
203.0 |
0.514 |
| 2027 |
202.7 |
0.518 |
| 2028 |
202.4 |
0.521 |
| 2029 |
202.0 |
0.525 |
| 2030 |
201.7 |
0.529 |
|
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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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