17471+1742 STF2215

 
 
17H 47M 08.05S +17 41' 49.2" P.A. 245.8 SEP 0.44 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
2013
Obs
216
Pa first
311
Pa last
251
P.A. Now (θ)
245.8°
Sep first
0.8
Sep last
0.5
Sep. Now (ρ)
0.44"
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
 
 
Constellation
Hercules
SAO
103106
HIP
87044
Tycho2
1556-01341-1
HD
161833
HR
6627
ADS
10795
BD
BD+17 3334
Distance
143.06
Distance ly
466.66
last precise pa
251.4
last precise sep
0.47
 
 
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 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2002
label rho theta
2000 0.505 257.7
2001 0.502 257.1
2002 0.498 256.5
2003 0.495 255.9
2004 0.491 255.3
2005 0.488 254.7
2006 0.484 254.1
2007 0.481 253.4
2008 0.477 252.8
2009 0.473 252.1
2010 0.470 251.5
2011 0.466 250.8
2012 0.463 250.1
2013 0.459 249.4
2014 0.456 248.7
2015 0.452 248.0
2016 0.449 247.3
2017 0.445 246.6
2018 0.442 245.8
2019 0.439 245.1
2020 0.435 244.3
2021 0.432 243.5
2022 0.428 242.7
2023 0.425 241.9
2024 0.422 241.1
2025 0.419 240.3
2026 0.415 239.4
2027 0.412 238.6
2028 0.409 237.7
2029 0.406 236.8
2030 0.403 235.9

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