01337-1213 HWE   4

 
 
01H 33M 42.39S -12 12' 46.1" P.A. 330.8 SEP 0.93 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)
330.8°
Sep first
0.9
Sep last
0.9
Sep. Now (ρ)
0.93"
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
 
 
Constellation
Cetus
SAO
147882
HIP
7274
Tycho2
5279-00225-1
HD
9575
ADS
1223
BD
BD-12 286
Distance
66.62
Distance ly
217.31
last precise pa
331.3
last precise sep
0.869
 
 
ORBITAL ELEMENTS
 
 
Period (P)146y Periastron (T)1927.13y Semi-major axis (a)0.911a
Eccentricity (e)0.953 Inclination (i)110.4° Longitude of periastron (ω)292.88°
Node (Ω)115.51° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation1978
label rho theta
2000 0.897 335.1
2001 0.900 334.8
2002 0.904 334.6
2003 0.907 334.3
2004 0.910 334.0
2005 0.913 333.8
2006 0.916 333.5
2007 0.918 333.3
2008 0.921 333.0
2009 0.923 332.8
2010 0.925 332.5
2011 0.926 332.3
2012 0.928 332.0
2013 0.929 331.7
2014 0.930 331.5
2015 0.930 331.2
2016 0.931 331.0
2017 0.931 330.8
2018 0.931 330.5
2019 0.931 330.3
2020 0.930 330.0
2021 0.929 329.8
2022 0.928 329.5
2023 0.927 329.3
2024 0.926 329.0
2025 0.924 328.7
2026 0.922 328.5
2027 0.920 328.2
2028 0.917 328.0
2029 0.914 327.7
2030 0.911 327.5

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic