17471+1742 STF 2215 (HD 161833)
17h 47m 08.05s +17° 41' 49.2" P.A. 249.00 sep 0.4 mag 6.02,6.89 Sp A1V dist. 143.06 pc (466.66 l.y.)
Coord 2000 |
17471+1742 |
|
Discov num |
STF2215 |
|
Comp |
|
|
Coord arcsec 2000 |
17 47 08.05 +17 41 49.2 |
|
Date first |
1831 |
|
Date last |
2018 |
|
Obs |
224 |
|
Pa first |
311 |
|
Pa last |
249.1 |
|
P.A. Now (θ) |
249.1° |
|
Sep first |
0.8 |
|
Sep last |
0.411 |
|
Sep. Now (ρ) |
0.411" |
|
Mag pri |
6.02 |
|
Mag sec |
6.89 |
|
delta mag (ΔM) |
0.87 |
|
Spectral class |
A1V (white) |
|
Pri motion ra |
+012 |
|
Sec motion ra |
+012 |
|
Pri motion dec |
-013 |
|
Sec motion dec |
-013 |
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 161833 |
|
Constellation |
Hercules |
|
SAO |
103106 |
|
HIP |
87044 |
|
Tycho2 |
1556-01341-1 |
|
Gaia DR2 |
4550988750326340608 |
|
HD |
161833 |
|
HR |
6627 |
|
GC |
24150 |
|
ADS |
10795 |
|
BD |
BD+17 3334 |
|
Distance |
143.06 |
|
Distance ly |
466.66 |
|
ORBITAL ELEMENTS
Period (P) | 1062.47y | ± 12.7 |
Periastron (T) | 2066.49y | ± 11.67 |
Semi-major axis (a) | 0.838a | ± 0.006 |
Eccentricity (e) | 0.397 | ± 0.004 |
Inclination (i) | 132.2° | ± 0.5 |
Longitude of periastron (ω) | 270.6° | ± 2.3 |
Node (Ω) | 105.5° | ± 1.5 |
Notes | n | |
Reference | Cve2006e | |
Equinox | 2000 | |
Last observation | 2002 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
257.7 |
0.505 |
2001 |
257.1 |
0.502 |
2002 |
256.5 |
0.498 |
2003 |
255.9 |
0.495 |
2004 |
255.3 |
0.491 |
2005 |
254.7 |
0.488 |
2006 |
254.1 |
0.484 |
2007 |
253.4 |
0.481 |
2008 |
252.8 |
0.477 |
2009 |
252.1 |
0.473 |
2010 |
251.5 |
0.470 |
2011 |
250.8 |
0.466 |
2012 |
250.1 |
0.463 |
2013 |
249.4 |
0.459 |
2014 |
248.7 |
0.456 |
2015 |
248.0 |
0.452 |
2016 |
247.3 |
0.449 |
2017 |
246.6 |
0.445 |
2018 |
245.8 |
0.442 |
2019 |
245.1 |
0.439 |
2020 |
244.3 |
0.435 |
2021 |
243.5 |
0.432 |
2022 |
242.7 |
0.428 |
2023 |
241.9 |
0.425 |
2024 |
241.1 |
0.422 |
2025 |
240.3 |
0.419 |
2026 |
239.4 |
0.415 |
2027 |
238.6 |
0.412 |
2028 |
237.7 |
0.409 |
2029 |
236.8 |
0.406 |
2030 |
235.9 |
0.403 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|