18534+2553 A  2989

 
 
18h 53m 24.53s +25 53' 05.3" P.A. 202.2 sep 0.29 mag 8.90,9.90 Sp F5
 
 
Coord 2000
18534+2553
Discov num
A  2989
Comp
Coord arcsec 2000
18 53 24.53 +25 53 05.3
Date first
1916
Date last
2007
Obs
13
Pa first
227
Pa last
191
P.A. Now (θ)
202.2°
Sep first
0.4
Sep last
0.3
Sep. Now (ρ)
0.29"
Mag pri
8.90
Mag sec
9.90
delta mag (ΔM)
1
Spectral class
F5 (yellow-white)
Pri motion ra
-052
Sec motion ra
Pri motion dec
-022
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
190.8
Precise sep
0.297
Constellation
Hercules
HD
337117
ADS
11802
last precise pa
190.8
last precise sep
0.297
 
 
ORBITAL ELEMENTS
 
 
Period (P)175y Periastron (T)1968.3y Semi-major axis (a)0.74a
Eccentricity (e)0.978 Inclination (i)78.7° Longitude of periastron (ω)281.3°
Node (Ω)80.9° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation1995
label rho theta
2000 0.217 189.2
2001 0.222 190.2
2002 0.226 191.1
2003 0.231 192.0
2004 0.235 192.8
2005 0.239 193.7
2006 0.244 194.5
2007 0.248 195.2
2008 0.252 195.9
2009 0.257 196.7
2010 0.261 197.3
2011 0.265 198.0
2012 0.269 198.7
2013 0.273 199.3
2014 0.277 199.9
2015 0.281 200.5
2016 0.285 201.1
2017 0.289 201.6
2018 0.293 202.2
2019 0.297 202.7
2020 0.300 203.2
2021 0.304 203.7
2022 0.308 204.2
2023 0.311 204.7
2024 0.315 205.2
2025 0.318 205.6
2026 0.322 206.1
2027 0.325 206.5
2028 0.329 206.9
2029 0.332 207.4
2030 0.335 207.8

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





wds18534%2B2553a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18534+2553 A 2989 2004 12 191 0.2 8.90 9.90 F5 O 185324.53+255305.3
18534+2553 A 2989 2007 13 191 0.3 8.90 9.90 F5 O 185324.53+255305.3

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