17141+5608 STT 327

 
 
17H 14M 06.83S +56 08' 01.7" P.A. 336.8 SEP 0.44 MAG 8.29,8.95 SP F2 DIST. 86.36 PC (281.71 L.Y.)
 
 
Coord 2000
17141+5608
Discov num
STT 327
Comp
Coord arcsec 2000
17 14 06.83 +56 08 01.7
Date first
1843
Date last
2010
Obs
93
Pa first
340
Pa last
336
P.A. Now (θ)
336.8°
Sep first
0.4
Sep last
0.4
Sep. Now (ρ)
0.44"
Mag pri
8.29
Mag sec
8.95
delta mag (ΔM)
0.66
Spectral class
F2 (yellow-white)
Pri motion ra
-017
Sec motion ra
-017
Pri motion dec
+015
Sec motion dec
+015
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Draco
SAO
30306
HIP
84300
Tycho2
3891-00660-1
HD
156389
ADS
10425
BD
BD+56 1959
Distance
86.36
Distance ly
281.71
last precise pa
335.9
last precise sep
0.433
 
 
ORBITAL ELEMENTS
 
 
Period (P)88.402y Periastron (T)1968.19y Semi-major axis (a)0.278a
Eccentricity (e)0.653 Inclination (i)57.3° Longitude of periastron (ω)12.3°
Node (Ω)146.4° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000 0.433 325.2
2001 0.437 325.9
2002 0.441 326.5
2003 0.445 327.2
2004 0.447 327.8
2005 0.450 328.5
2006 0.451 329.1
2007 0.453 329.7
2008 0.454 330.4
2009 0.454 331.0
2010 0.454 331.6
2011 0.454 332.2
2012 0.453 332.9
2013 0.451 333.5
2014 0.449 334.1
2015 0.447 334.8
2016 0.444 335.4
2017 0.441 336.1
2018 0.437 336.8
2019 0.433 337.4
2020 0.429 338.1
2021 0.424 338.8
2022 0.418 339.6
2023 0.413 340.3
2024 0.406 341.1
2025 0.399 341.9
2026 0.392 342.7
2027 0.384 343.5
2028 0.376 344.4
2029 0.368 345.4
2030 0.359 346.3

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic