17530+8354 STT 349

 
 
17H 52M 59.03S +83 54' 27.2" P.A. 56.3 SEP 0.51 MAG 7.95,8.89 SP G5 DIST. 219.3 PC (715.36 L.Y.)
 
 
Coord 2000
17530+8354
Discov num
STT 349
Comp
Coord arcsec 2000
17 52 59.03 +83 54 27.2
Date first
1843
Date last
2009
Obs
73
Pa first
92
Pa last
49
P.A. Now (θ)
56.3°
Sep first
0.4
Sep last
0.5
Sep. Now (ρ)
0.51"
Mag pri
7.95
Mag sec
8.89
delta mag (ΔM)
0.94
Spectral class
G5 (yellow)
Pri motion ra
+005
Sec motion ra
+005
Pri motion dec
+008
Sec motion dec
+008
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Draco
SAO
2975
HIP
87534
Tycho2
4647-01538-1
HD
167101
ADS
11006
BD
BD+83 527
Distance
219.3
Distance ly
715.36
last precise pa
48.6
last precise sep
0.47
 
 
ORBITAL ELEMENTS
 
 
Period (P)433y Periastron (T)1912y Semi-major axis (a)0.635a
Eccentricity (e)0.87 Inclination (i)67.5° Longitude of periastron (ω)128°
Node (Ω)98° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.440 51.2
2001 0.444 51.6
2002 0.448 51.9
2003 0.452 52.2
2004 0.457 52.5
2005 0.461 52.8
2006 0.465 53.1
2007 0.469 53.4
2008 0.473 53.7
2009 0.477 53.9
2010 0.482 54.2
2011 0.486 54.5
2012 0.490 54.8
2013 0.494 55.0
2014 0.498 55.3
2015 0.502 55.5
2016 0.506 55.8
2017 0.510 56.0
2018 0.514 56.3
2019 0.518 56.5
2020 0.521 56.7
2021 0.525 57.0
2022 0.529 57.2
2023 0.533 57.4
2024 0.537 57.6
2025 0.541 57.9
2026 0.544 58.1
2027 0.548 58.3
2028 0.552 58.5
2029 0.556 58.7
2030 0.559 58.9

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