17436+2237 HU 1285

 
 
17H 43M 38.76S +22 36' 43.2" P.A. 211 SEP 0.48 MAG 8.88,9.17 SP F5 DIST. 156.74 PC (511.29 L.Y.)
 
 
Coord 2000
17436+2237
Discov num
HU 1285
Comp
Coord arcsec 2000
17 43 38.76 +22 36 43.2
Date first
1905
Date last
2015
Obs
51
Pa first
252
Pa last
215
P.A. Now (θ)
211°
Sep first
0.4
Sep last
0.6
Sep. Now (ρ)
0.48"
Mag pri
8.88
Mag sec
9.17
delta mag (ΔM)
0.29
Spectral class
F5 (yellow-white)
Pri motion ra
-020
Sec motion ra
-020
Pri motion dec
-009
Sec motion dec
-009
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
85363
HIP
86756
Tycho2
2077-03605-1
HD
161258
ADS
10743
BD
BD+22 3199
Distance
156.74
Distance ly
511.29
last precise pa
214.7
last precise sep
0.61
 
 
ORBITAL ELEMENTS
 
 
Period (P)825y Periastron (T)2040y Semi-major axis (a)1.38a
Eccentricity (e)0.791 Inclination (i)101.1° Longitude of periastron (ω)249.8°
Node (Ω)27.3° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation1996
label rho theta
2000 0.553 217.4
2001 0.551 217.1
2002 0.549 216.8
2003 0.547 216.4
2004 0.545 216.1
2005 0.542 215.8
2006 0.539 215.4
2007 0.536 215.1
2008 0.533 214.8
2009 0.529 214.4
2010 0.525 214.1
2011 0.521 213.7
2012 0.516 213.3
2013 0.511 213.0
2014 0.506 212.6
2015 0.500 212.2
2016 0.493 211.8
2017 0.487 211.4
2018 0.479 211.0
2019 0.472 210.5
2020 0.463 210.1
2021 0.454 209.6
2022 0.444 209.1
2023 0.434 208.6
2024 0.423 208.1
2025 0.411 207.5
2026 0.398 206.9
2027 0.384 206.3
2028 0.370 205.6
2029 0.354 204.9
2030 0.337 204.0

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