18044+0337 A  2257

 
 
18h 04m 22.03s +03 36' 50.0" P.A. 33.7 sep 0.17 mag 9.80,10.00 Sp F5
 
 
Coord 2000
18044+0337
Discov num
A  2257
Comp
Coord arcsec 2000
18 04 22.03 +03 36 50.0
Date first
1910
Date last
2009
Obs
11
Pa first
163
Pa last
30
P.A. Now (θ)
33.7°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.17"
Mag pri
9.80
Mag sec
10.00
delta mag (ΔM)
0.2
Spectral class
F5 (yellow-white)
Pri motion ra
+004
Sec motion ra
Pri motion dec
+013
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
29.8
Precise sep
0.159
Constellation
Ophiuchus
Tycho2
0434-00384-1
HD
165110
ADS
11033
last precise pa
29.8
last precise sep
0.159
 
 
ORBITAL ELEMENTS
 
 
Period (P)333y± 20 Periastron (T)1988.73y± 0.06 Semi-major axis (a)0.324a± 0.015
Eccentricity (e)0.829± 0.006 Inclination (i)73.5°± 1 Longitude of periastron (ω)274.3°± 2
Node (Ω)13.6°± 1 Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2005
label rho theta
2000 0.129 20.8
2001 0.134 21.8
2002 0.138 22.8
2003 0.142 23.7
2004 0.146 24.6
2005 0.149 25.4
2006 0.152 26.2
2007 0.154 27.0
2008 0.157 27.7
2009 0.159 28.4
2010 0.161 29.1
2011 0.163 29.8
2012 0.165 30.5
2013 0.166 31.1
2014 0.168 31.8
2015 0.169 32.4
2016 0.171 33.0
2017 0.172 33.7
2018 0.173 34.3
2019 0.174 34.9
2020 0.175 35.5
2021 0.175 36.0
2022 0.176 36.6
2023 0.177 37.2
2024 0.177 37.8
2025 0.178 38.3
2026 0.179 38.9
2027 0.179 39.5
2028 0.179 40.0
2029 0.180 40.6
2030 0.180 41.2

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

grafico orbita





wds18044%2B0337b.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
18044+0337 A 2257 2005 10 28 0.1 9.80 10.00 F5 NOD 180422.03+033650.0
18044+0337 A 2257 2009 11 30 0.2 9.80 10.00 F5 NOD 180422.03+033650.0

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