01337-1213 HWE   4

 
 
01h 33m 42.39s -12 12' 46.1" P.A. 330 sep 0.87 mag 9.23,9.31 Sp G3V dist. 66.62 pc (217.31 l.y.)
 
 
Coord 2000
01337-1213
Discov num
HWE   4
Comp
Coord arcsec 2000
01 33 42.39 -12 12 46.1
Date first
1877
Date last
2013
Obs
57
Pa first
328
Pa last
331
P.A. Now (θ)
330°
Sep first
0.9
Sep last
0.9
Sep. Now (ρ)
0.87"
Mag pri
9.23
Mag sec
9.31
delta mag (ΔM)
0.08
Spectral class
G3V (yellow)
Pri motion ra
-011
Sec motion ra
-011
Pri motion dec
-009
Sec motion dec
-009
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
331.3
Precise sep
0.869
Cdsa2 id
HWE 4
Constellation
Cetus
SAO
147882
HIP
7274
Tycho2
5279-00225-1
HD
9575
ADS
1223
BD
BD-12 286
Ra deg
1.5617750000000001
De deg
-12.212805555555555
Distance
66.62
Distance ly
217.31
last precise pa
331.3
last precise sep
0.869
 
 
ORBITAL ELEMENTS
 
 
Period (P)142.42y Periastron (T)2065.92y Semi-major axis (a)0.571a
Eccentricity (e)0.837 Inclination (i)118.6° Longitude of periastron (ω)318.6°
Node (Ω)133.7° Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.869 335.0
2001 0.871 334.8
2002 0.873 334.5
2003 0.875 334.2
2004 0.876 333.9
2005 0.877 333.6
2006 0.878 333.3
2007 0.878 333.1
2008 0.878 332.8
2009 0.878 332.5
2010 0.878 332.2
2011 0.878 332.0
2012 0.877 331.7
2013 0.875 331.4
2014 0.874 331.1
2015 0.872 330.8
2016 0.870 330.5
2017 0.868 330.3
2018 0.865 330.0
2019 0.862 329.7
2020 0.859 329.4
2021 0.855 329.1
2022 0.851 328.8
2023 0.847 328.5
2024 0.842 328.2
2025 0.837 327.9
2026 0.831 327.6
2027 0.826 327.3
2028 0.819 326.9
2029 0.813 326.6
2030 0.806 326.3

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

grafico orbita





wds01337-1213e.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
01337-1213 HWE 4 2003 52 334 0.8 9.23 9.31 G3V NOD 013342.39-121246.1
01337-1213 HWE 4 2008 54 333 0.9 9.23 9.31 G3V NOD 013342.39-121246.1
01337-1213 HWE 4 2009 55 332 0.8 9.23 9.31 G3V NOD 013342.39-121246.1
01337-1213 HWE 4 2013 57 331 0.9 9.23 9.31 G3V NO 013342.39-121246.1

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