19394+2215 STF2556

 
 
19h 39m 26.31s +22 15' 23.4" P.A. 340.5 sep 0.37 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
2012
Obs
198
Pa first
188
Pa last
349
P.A. Now (θ)
340.5°
Sep first
0.6
Sep last
0.4
Sep. Now (ρ)
0.37"
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
 
 
Precise pa
348.5
Precise sep
0.37
Cdsa2 id
STF 2556
Constellation
Vulpecula
HIP
96691
Tycho2
1614-00138-1
HD
185661
ADS
12752
Ra deg
19.657308333333333
De deg
22.2565
Distance
147.28
Distance ly
480.43
last precise pa
348.5
last precise sep
0.37
 
 
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° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation1997
label rho theta
2000 0.358 5.3
2001 0.358 3.8
2002 0.359 2.4
2003 0.359 1.0
2004 0.359 359.6
2005 0.360 358.2
2006 0.360 356.8
2007 0.361 355.4
2008 0.362 354.0
2009 0.363 352.6
2010 0.363 351.3
2011 0.364 349.9
2012 0.365 348.5
2013 0.366 347.2
2014 0.367 345.8
2015 0.368 344.5
2016 0.370 343.2
2017 0.371 341.8
2018 0.372 340.5
2019 0.374 339.2
2020 0.375 337.9
2021 0.377 336.6
2022 0.379 335.4
2023 0.380 334.1
2024 0.382 332.9
2025 0.384 331.6
2026 0.386 330.4
2027 0.388 329.2
2028 0.390 328.0
2029 0.392 326.8
2030 0.395 325.6

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





wds19394%2B2215a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19394+2215 STF2556 2007 198 348 0.4 7.71 8.92 F4IV NOD 193926.31+221523.4
19394+2215 STF2556 2008 201 352 0.4 7.71 8.92 F4IV NOD 193926.31+221523.4
19394+2215 STF2556 2012 203 349 0.4 7.71 8.92 F4IV NOD 193926.31+221523.4

If you need more information about this double, apply for a data request form to the WDS.