18163+3625 HU 1291

 
 
18h 16m 16.75s +36 25' 18.1" P.A. 48.7 sep 0.29 mag 9.30,10.00 Sp F5
 
 
Coord 2000
18163+3625
Discov num
HU 1291
Comp
Coord arcsec 2000
18 16 16.75 +36 25 18.1
Date first
1905
Date last
2010
Obs
23
Pa first
337
Pa last
61
P.A. Now (θ)
48.7°
Sep first
0.4
Sep last
0.3
Sep. Now (ρ)
0.29"
Mag pri
9.30
Mag sec
10.00
delta mag (ΔM)
0.7
Spectral class
F5 (yellow-white)
Pri motion ra
+017
Sec motion ra
Pri motion dec
-009
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
60.6
Precise sep
0.25
Constellation
Lyra
SAO
66814
Tycho2
2634-00510-1
ADS
11225
last precise pa
60.6
last precise sep
0.25
 
 
ORBITAL ELEMENTS
 
 
Period (P)215.89y Periastron (T)1988.75y Semi-major axis (a)0.332a
Eccentricity (e)0.683 Inclination (i)147.4° Longitude of periastron (ω)278°
Node (Ω)92° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2008
label rho theta
2000 0.179 84.3
2001 0.187 81.0
2002 0.195 77.9
2003 0.203 75.0
2004 0.210 72.3
2005 0.218 69.9
2006 0.225 67.6
2007 0.231 65.4
2008 0.238 63.3
2009 0.244 61.4
2010 0.251 59.5
2011 0.257 57.8
2012 0.263 56.1
2013 0.268 54.5
2014 0.274 53.0
2015 0.280 51.5
2016 0.285 50.1
2017 0.290 48.7
2018 0.295 47.4
2019 0.300 46.1
2020 0.305 44.9
2021 0.310 43.7
2022 0.314 42.5
2023 0.319 41.4
2024 0.323 40.3
2025 0.328 39.2
2026 0.332 38.2
2027 0.336 37.2
2028 0.340 36.2
2029 0.344 35.2
2030 0.348 34.3

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

grafico orbita





wds18163%2B3625b.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
18163+3625 HU 1291 1996 18 101 0.1 9.30 10.00 F5 O 181616.75+362518.1
18163+3625 HU 1291 2006 19 67 0.2 9.30 10.00 F5 O 181616.75+362518.1
18163+3625 HU 1291 2008 22 60 0.2 9.30 10.00 F5 O 181616.75+362518.1
18163+3625 HU 1291 2010 23 61 0.3 9.30 10.00 F5 O 181616.75+362518.1

If you need more information about this double, apply for a data request form to the WDS.