18197+1016 HU  197

 
 
18H 19M 40.18S +10 16' 19.2" P.A. 55.4 SEP 0.5 MAG 8.73,9.77 SP G0 DIST. 57.47 PC (187.47 L.Y.)
 
 
Coord 2000
18197+1016
Discov num
HU  197
Comp
Coord arcsec 2000
18 19 40.18 +10 16 19.2
Date first
1900
Date last
2010
Obs
81
Pa first
28
Pa last
65
P.A. Now (θ)
55.4°
Sep first
0.4
Sep last
0.5
Sep. Now (ρ)
0.5"
Mag pri
8.73
Mag sec
9.77
delta mag (ΔM)
1.04
Spectral class
G0 (yellow)
Pri motion ra
-098
Sec motion ra
Pri motion dec
-208
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Ophiuchus
SAO
103612
HIP
89806
Tycho2
1014-02144-1
HD
168499
ADS
11260
BD
BD+10 3473
Distance
57.47
Distance ly
187.47
last precise pa
65
last precise sep
0.521
 
 
ORBITAL ELEMENTS
 
 
Period (P)135.4y Periastron (T)1930.8y Semi-major axis (a)0.487a
Eccentricity (e)0.057 Inclination (i)125.7° Longitude of periastron (ω)317.5°
Node (Ω)238.02° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.443 83.3
2001 0.450 81.4
2002 0.458 79.6
2003 0.465 77.9
2004 0.471 76.2
2005 0.477 74.6
2006 0.483 73.0
2007 0.488 71.4
2008 0.492 69.9
2009 0.496 68.4
2010 0.500 66.9
2011 0.503 65.5
2012 0.505 64.0
2013 0.506 62.6
2014 0.507 61.2
2015 0.507 59.7
2016 0.507 58.3
2017 0.506 56.9
2018 0.504 55.4
2019 0.502 54.0
2020 0.499 52.5
2021 0.495 51.0
2022 0.491 49.5
2023 0.486 48.0
2024 0.480 46.4
2025 0.474 44.8
2026 0.467 43.1
2027 0.460 41.4
2028 0.452 39.7
2029 0.444 37.8
2030 0.436 35.9

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