18229+1458 HU  581

 
 
18H 22M 54.84S +14 58' 11.0" P.A. 123.1 SEP 0.31 MAG 8.80,9.40 SP G0V DIST. 79.3 PC (258.68 L.Y.)
 
 
Coord 2000
18229+1458
Discov num
HU  581
Comp
Coord arcsec 2000
18 22 54.84 +14 58 11.0
Date first
1902
Date last
2008
Obs
45
Pa first
120
Pa last
117
P.A. Now (θ)
123.1°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.31"
Mag pri
8.80
Mag sec
9.40
delta mag (ΔM)
0.6
Spectral class
G0V (yellow)
Pri motion ra
+003
Sec motion ra
Pri motion dec
+045
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
103656
HIP
90075
Tycho2
1022-01145-1
ADS
11300
BD
BD+14 3507
Distance
79.3
Distance ly
258.68
last precise pa
116.7
last precise sep
0.255
 
 
ORBITAL ELEMENTS
 
 
Period (P)54.11y± 6.05 Periastron (T)1992.13y± 0.64 Semi-major axis (a)0.234a± 0.046
Eccentricity (e)0.797± 0.173 Inclination (i)83.2°± 59.1 Longitude of periastron (ω)45°± 16.1
Node (Ω)296.7°± 16.1 Note Grade3(1=Definitive, 9=Indet.)
Equinox Last observation1990
label rho theta
2000 0.253 118.2
2001 0.268 118.6
2002 0.280 118.9
2003 0.291 119.2
2004 0.300 119.5
2005 0.307 119.8
2006 0.313 120.1
2007 0.318 120.3
2008 0.322 120.6
2009 0.324 120.8
2010 0.326 121.1
2011 0.326 121.3
2012 0.326 121.6
2013 0.325 121.8
2014 0.323 122.1
2015 0.320 122.3
2016 0.316 122.6
2017 0.312 122.8
2018 0.306 123.1
2019 0.301 123.4
2020 0.294 123.7
2021 0.287 124.0
2022 0.279 124.3
2023 0.270 124.7
2024 0.261 125.0
2025 0.251 125.4
2026 0.241 125.9
2027 0.230 126.3
2028 0.218 126.9
2029 0.206 127.4
2030 0.193 128.1

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