19394+2215 STF 2556 (HD 185661)
19h 39m 26.31s +22° 15' 23.4" P.A. 334.00 sep 0.4 mag 7.71,8.92 Sp F4IV dist. 147.28 pc (480.43 l.y.)
| Coord 2000 |
19394+2215 |
|
Discov num |
STF2556 |
|
Comp |
|
|
Coord arcsec 2000 |
19 39 26.31 +22 15 23.4 |
|
| Date first |
1829 |
|
Date last |
2018 |
|
Obs |
203 |
|
| Pa first |
188 |
|
Pa last |
334.4 |
|
P.A. Now (θ) |
334.4° |
|
| Sep first |
0.6 |
|
Sep last |
0.421 |
|
Sep. Now (ρ) |
0.421" |
|
| Mag pri |
7.71 |
|
Mag sec |
8.92 |
|
delta mag (ΔM) |
1.21 |
|
Spectral class |
F4IV (yellow-white) |
|
| Pri motion ra |
+003 |
|
Sec motion ra |
+003 |
|
| Pri motion dec |
+013 |
|
Sec motion dec |
+013 |
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 185661 |
|
Constellation |
Vulpecula |
|
SAO |
87508 |
|
HIP |
96691 |
|
| Tycho2 |
1614-00138-1 |
|
HD |
185661 |
|
GC |
27199 |
|
ADS |
12752 |
|
| BD |
BD+21 3862 |
|
Distance |
147.28 |
|
Distance ly |
480.43 |
|
ORBITAL ELEMENTS
| Period (P) | 622.4y | |
Periastron (T) | 1970.31y | |
Semi-major axis (a) | 0.678a | |
| Eccentricity (e) | 0.476 | |
Inclination (i) | 140.9° | |
Longitude of periastron (ω) | 356° | |
| Node (Ω) | 44.5° | |
Notes | | |
Reference | Ari1999 | |
| Equinox | 2000 | |
Last observation | 1997 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
5.3 |
0.358 |
| 2001 |
3.8 |
0.358 |
| 2002 |
2.4 |
0.359 |
| 2003 |
1.0 |
0.359 |
| 2004 |
359.6 |
0.359 |
| 2005 |
358.2 |
0.360 |
| 2006 |
356.8 |
0.360 |
| 2007 |
355.4 |
0.361 |
| 2008 |
354.0 |
0.362 |
| 2009 |
352.6 |
0.363 |
| 2010 |
351.3 |
0.363 |
| 2011 |
349.9 |
0.364 |
| 2012 |
348.5 |
0.365 |
| 2013 |
347.2 |
0.366 |
| 2014 |
345.8 |
0.367 |
| 2015 |
344.5 |
0.368 |
| 2016 |
343.2 |
0.370 |
| 2017 |
341.8 |
0.371 |
| 2018 |
340.5 |
0.372 |
| 2019 |
339.2 |
0.374 |
| 2020 |
337.9 |
0.375 |
| 2021 |
336.6 |
0.377 |
| 2022 |
335.4 |
0.379 |
| 2023 |
334.1 |
0.380 |
| 2024 |
332.9 |
0.382 |
| 2025 |
331.6 |
0.384 |
| 2026 |
330.4 |
0.386 |
| 2027 |
329.2 |
0.388 |
| 2028 |
328.0 |
0.390 |
| 2029 |
326.8 |
0.392 |
| 2030 |
325.6 |
0.395 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
