18410+2450 A  2988

 
 
18H 40M 59.63S +24 49' 30.3" P.A. 216.4 SEP 0.15 MAG 8.08,9.08 SP F0V DIST. 222.22 PC (724.88 L.Y.)
 
 
Coord 2000
18410+2450
Discov num
A  2988
Comp
Coord arcsec 2000
18 40 59.63 +24 49 30.3
Date first
1916
Date last
2006
Obs
61
Pa first
12
Pa last
251
P.A. Now (θ)
216.4°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.15"
Mag pri
8.08
Mag sec
9.08
delta mag (ΔM)
1
Spectral class
F0V (yellow-white)
Pri motion ra
-004
Sec motion ra
Pri motion dec
+005
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hercules
SAO
86316
HIP
91609
Tycho2
2111-00370-1
HD
172743
ADS
11574
BD
BD+24 3493
Distance
222.22
Distance ly
724.88
last precise pa
250.8
last precise sep
0.082
 
 
ORBITAL ELEMENTS
 
 
Period (P)57.172y± 1.168 Periastron (T)1941.464y± 1.52 Semi-major axis (a)0.102a± 0.019
Eccentricity (e)0.688± 0.101 Inclination (i)154.7°± 19 Longitude of periastron (ω)306.8°± 11.5
Node (Ω)329.6°± 9.7 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation1995
label rho theta
2000 0.039 327.2
2001 0.048 303.9
2002 0.056 287.9
2003 0.065 276.2
2004 0.073 267.2
2005 0.081 259.9
2006 0.088 253.9
2007 0.095 248.7
2008 0.101 244.2
2009 0.107 240.3
2010 0.113 236.7
2011 0.118 233.5
2012 0.123 230.5
2013 0.128 227.8
2014 0.132 225.2
2015 0.136 222.8
2016 0.140 220.6
2017 0.143 218.4
2018 0.146 216.4
2019 0.149 214.4
2020 0.151 212.5
2021 0.154 210.6
2022 0.156 208.8
2023 0.157 207.1
2024 0.159 205.4
2025 0.160 203.7
2026 0.161 202.0
2027 0.162 200.4
2028 0.162 198.7
2029 0.162 197.1
2030 0.162 195.4

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