13491+2659 STF1785

 
 
13h 49m 04.00s +26 58' 47.7" P.A. 188.8 sep 2.82 mag 7.36,8.15 Sp K4V+K6V dist. 13.41 pc (43.74 l.y.)
 
 
Coord 2000
13491+2659
Discov num
STF1785
Comp
Coord arcsec 2000
13 49 04.00 +26 58 47.7
Date first
1823
Date last
2017
Obs
885
Pa first
160
Pa last
187
P.A. Now (θ)
188.8°
Sep first
5.7
Sep last
2.9
Sep. Now (ρ)
2.82"
Mag pri
7.36
Mag sec
8.15
delta mag (ΔM)
0.79
Spectral class
K4V+K6V (yellow-orange/yellow-orange)
Pri motion ra
-427
Sec motion ra
-471
Pri motion dec
-090
Sec motion dec
-092
Notes
N O (See Notes, Orbital solution)
rPM=0.092 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
187.1
Precise sep
2.902
Constellation
Bootes
SAO
83011
HIP
67422
Tycho2
2002-00492-1
HD
120476
ADS
9031
GL
Gl 528A
BD
BD+27 2296
Distance
13.41
Distance ly
43.74
last precise pa
187.1
last precise sep
2.902
 
 
ORBITAL ELEMENTS
 
 
Period (P)155.75y Periastron (T)1916.75y Semi-major axis (a)2.433a
Eccentricity (e)0.446 Inclination (i)47.4° Longitude of periastron (ω)200°
Node (Ω)155.4° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation1987
label rho theta
2000 3.328 173.2
2001 3.309 173.9
2002 3.290 174.7
2003 3.269 175.5
2004 3.247 176.2
2005 3.223 177.0
2006 3.199 177.8
2007 3.173 178.6
2008 3.147 179.5
2009 3.119 180.3
2010 3.090 181.2
2011 3.060 182.1
2012 3.029 182.9
2013 2.996 183.9
2014 2.963 184.8
2015 2.929 185.8
2016 2.893 186.7
2017 2.857 187.7
2018 2.820 188.8
2019 2.782 189.8
2020 2.742 190.9
2021 2.702 192.0
2022 2.662 193.2
2023 2.620 194.4
2024 2.578 195.6
2025 2.535 196.9
2026 2.491 198.2
2027 2.447 199.5
2028 2.402 200.9
2029 2.356 202.4
2030 2.310 203.9

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

grafico orbita





wds13491%2B2659a.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
13491+2659 STF1785 2007 841 179 3.2 7.36 8.15 K4V K6V NODV 134904.00+265847.7
13491+2659 STF1785 2008 842 178 3.1 7.36 8.15 K4V K6V NODV 134904.00+265847.7
13491+2659 STF1785 2009 845 180 3.1 7.36 8.15 K4V K6V NODV 134904.00+265847.7
13491+2659 STF1785 2010 859 181 3.1 7.36 8.15 K4V K6V NOD 134904.00+265847.7
13491+2659 STF1785 2011 863 182 3.0 7.36 8.15 K4V K6V NOD 134904.00+265847.7
13491+2659 STF1785 2013 863 184 3.0 7.36 8.15 K4V K6V NOD 134904.00+265847.7
13491+2659 STF1785 2015 873 190 2.7 7.36 8.15 K4V+K6V NOD 134904.00+265847.7
13491+2659 STF1785 2016 884 189 3.2 7.36 8.15 K4V+K6V NO 134904.00+265847.7
13491+2659 STF1785 2017 885 187 2.9 7.36 8.15 K4V+K6V NO 134904.00+265847.7

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