18360+1144 STT 357

 
 
18H 35M 57.08S +11 43' 42.1" P.A. 69.5 SEP 0.37 MAG 8.08,8.87 SP A7V DIST. 223.21 PC (728.11 L.Y.)
 
 
Coord 2000
18360+1144
Discov num
STT 357
Comp
Coord arcsec 2000
18 35 57.08 +11 43 42.1
Date first
1843
Date last
2011
Obs
143
Pa first
272
Pa last
76
P.A. Now (θ)
69.5°
Sep first
0.5
Sep last
0.4
Sep. Now (ρ)
0.37"
Mag pri
8.08
Mag sec
8.87
delta mag (ΔM)
0.79
Spectral class
A7V (white)
Pri motion ra
+012
Sec motion ra
+012
Pri motion dec
-011
Sec motion dec
-011
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Ophiuchus
SAO
103885
HIP
91167
Tycho2
1032-01257-1
HD
171728
ADS
11484
BD
BD+11 3518
Distance
223.21
Distance ly
728.11
last precise pa
76.4
last precise sep
0.388
 
 
ORBITAL ELEMENTS
 
 
Period (P)411.1y Periastron (T)1968.324y Semi-major axis (a)0.511a
Eccentricity (e)0.317 Inclination (i)124.8° Longitude of periastron (ω)321.9°
Node (Ω)93.8° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.377 85.4
2001 0.378 84.5
2002 0.378 83.6
2003 0.378 82.8
2004 0.378 81.9
2005 0.378 81.0
2006 0.378 80.2
2007 0.377 79.3
2008 0.377 78.4
2009 0.376 77.6
2010 0.376 76.7
2011 0.375 75.8
2012 0.374 74.9
2013 0.373 74.0
2014 0.373 73.1
2015 0.372 72.2
2016 0.370 71.3
2017 0.369 70.4
2018 0.368 69.5
2019 0.367 68.6
2020 0.366 67.7
2021 0.364 66.8
2022 0.363 65.8
2023 0.362 64.9
2024 0.360 63.9
2025 0.359 63.0
2026 0.357 62.0
2027 0.356 61.0
2028 0.354 60.1
2029 0.353 59.1
2030 0.351 58.1

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