13571-2731 I   234

 
 
13h 57m 06.59s -27 31' 25.8" P.A. 211.6 sep 0.57 mag 8.61,9.67 Sp G8/K0V dist. 140.06 pc (456.88 l.y.)
 
 
Coord 2000
13571-2731
Discov num
I   234
Comp
Coord arcsec 2000
13 57 06.59 -27 31 25.8
Date first
1897
Date last
2014
Obs
27
Pa first
315
Pa last
215
P.A. Now (θ)
211.6°
Sep first
0.8
Sep last
0.6
Sep. Now (ρ)
0.57"
Mag pri
8.61
Mag sec
9.67
delta mag (ΔM)
1.06
Spectral class
G8/K0V (yellow)
Pri motion ra
-154
Sec motion ra
-154
Pri motion dec
-062
Sec motion dec
-062
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
214.9
Precise sep
0.575
Constellation
Hydra
SAO
182111
HIP
68148
Tycho2
6724-00569-1
HD
121632
ADS
9064
CD
CD-2610004
CP
CP-26 5113
Distance
140.06
Distance ly
456.88
last precise pa
214.9
last precise sep
0.575
 
 
ORBITAL ELEMENTS
 
 
Period (P)200.72y± 17.44 Periastron (T)2057.91y± 10.04 Semi-major axis (a)0.773a± 0.043
Eccentricity (e)0.725± 0.023 Inclination (i)117.3°± 1.3 Longitude of periastron (ω)83.9°± 1.1
Node (Ω)165.9°± 8.6 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.582 228.8
2001 0.582 227.8
2002 0.582 226.8
2003 0.581 225.8
2004 0.581 224.8
2005 0.581 223.8
2006 0.580 222.8
2007 0.580 221.8
2008 0.580 220.8
2009 0.579 219.8
2010 0.579 218.7
2011 0.578 217.7
2012 0.578 216.7
2013 0.577 215.7
2014 0.577 214.7
2015 0.576 213.7
2016 0.575 212.7
2017 0.574 211.6
2018 0.573 210.6
2019 0.572 209.6
2020 0.571 208.5
2021 0.570 207.5
2022 0.569 206.4
2023 0.567 205.4
2024 0.565 204.3
2025 0.563 203.3
2026 0.561 202.2
2027 0.559 201.1
2028 0.557 200.0
2029 0.554 198.9
2030 0.551 197.8

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

grafico orbita





wds13571-2731a.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
13571-2731 I 234 2006 26 223 0.6 8.61 9.67 G8/K0V NOD 135706.59-273125.8
13571-2731 I 234 2014 27 215 0.6 8.61 9.67 G8/K0V NO 135706.59-273125.8

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