18575+5814 STF2438

 
 
18h 57m 28.47s +58 13' 30.0" P.A. 356.6 sep 0.82 mag 7.01,7.44 Sp A2IV dist. 125.16 pc (408.27 l.y.)
 
 
Coord 2000
18575+5814
Discov num
STF2438
Comp
Coord arcsec 2000
18 57 28.47 +58 13 30.0
Date first
1782
Date last
2013
Obs
181
Pa first
355
Pa last
358
P.A. Now (θ)
356.6°
Sep first
1.0
Sep last
0.9
Sep. Now (ρ)
0.82"
Mag pri
7.01
Mag sec
7.44
delta mag (ΔM)
0.43
Spectral class
A2IV (white)
Pri motion ra
+004
Sec motion ra
+039
Pri motion dec
+037
Sec motion dec
+002
Notes
N O (See Notes, Orbital solution)
rPM=1.268
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
357.9
Precise sep
0.85
Cdsa2 id
STF 2438
Constellation
Draco
SAO
31292
HIP
93068
Tycho2
3931-01171-1
HD
176560
HR
7184
ADS
11897
Ra deg
18.957908333333332
De deg
58.225
Distance
125.16
Distance ly
408.27
last precise pa
357.9
last precise sep
0.85
 
 
ORBITAL ELEMENTS
 
 
Period (P)231.25y Periastron (T)1882.73y Semi-major axis (a)0.476a
Eccentricity (e)0.9 Inclination (i)149° Longitude of periastron (ω)43.9°
Node (Ω)219.8° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation1999
label rho theta
2000 0.844 360.0
2001 0.843 359.8
2002 0.843 359.6
2003 0.842 359.4
2004 0.841 359.2
2005 0.840 359.0
2006 0.839 358.9
2007 0.838 358.7
2008 0.837 358.5
2009 0.836 358.3
2010 0.834 358.1
2011 0.833 357.9
2012 0.831 357.7
2013 0.830 357.5
2014 0.828 357.3
2015 0.826 357.2
2016 0.825 357.0
2017 0.823 356.8
2018 0.821 356.6
2019 0.819 356.4
2020 0.816 356.2
2021 0.814 356.0
2022 0.812 355.8
2023 0.809 355.6
2024 0.807 355.4
2025 0.804 355.2
2026 0.802 355.0
2027 0.799 354.8
2028 0.796 354.6
2029 0.793 354.3
2030 0.790 354.1

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

grafico orbita





wds18575%2B5814a.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
18575+5814 STF2438 2004 182 360 0.9 7.01 7.44 A2IV NOD 185728.47+581330.0
18575+5814 STF2438 2006 184 360 0.9 7.01 7.44 A2IV NOD 185728.47+581330.0
18575+5814 STF2438 2009 185 359 0.9 7.01 7.44 A2IV NOD 185728.47+581330.0
18575+5814 STF2438 2010 187 359 0.8 7.01 7.44 A2IV NOD 185728.47+581330.0
18575+5814 STF2438 2012 188 357 0.8 7.01 7.44 A2IV NOD 185728.47+581330.0
18575+5814 STF2438 2013 190 358 0.9 7.01 7.44 A2IV NOD 185728.47+581330.0

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