01559+0151 STF 186

 
 
01H 55M 53.80S +01 50' 59.6" P.A. 71.8 SEP 0.71 MAG 6.79,6.84 SP F9V DIST. 39.89 PC (130.12 L.Y.)
 
 
Coord 2000
01559+0151
Discov num
STF 186
Comp
Coord arcsec 2000
01 55 53.80 +01 50 59.6
Date first
1825
Date last
2015
Obs
431
Pa first
240
Pa last
251
P.A. Now (θ)
71.8°
Sep first
1.4
Sep last
0.7
Sep. Now (ρ)
0.71"
Mag pri
6.79
Mag sec
6.84
delta mag (ΔM)
0.05
Spectral class
F9V (yellow-white)
Pri motion ra
+164
Sec motion ra
+164
Pri motion dec
+189
Sec motion dec
+189
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cetus
SAO
110235
HIP
8998
Tycho2
0030-01344-1
HD
11803
HR
560
ADS
1538
BD
BD+01 347
Distance
39.89
Distance ly
130.12
last precise pa
250.8
last precise sep
0.727
 
 
ORBITAL ELEMENTS
 
 
Period (P)165.72y Periastron (T)1892.28y Semi-major axis (a)0.986a
Eccentricity (e)0.726 Inclination (i)72.4° Longitude of periastron (ω)40.2°
Node (Ω)219.7° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2006
label rho theta
2000 1.029 61.7
2001 1.012 62.1
2002 0.995 62.6
2003 0.978 63.0
2004 0.961 63.5
2005 0.943 64.0
2006 0.925 64.5
2007 0.906 65.0
2008 0.888 65.6
2009 0.869 66.1
2010 0.850 66.7
2011 0.830 67.3
2012 0.811 68.0
2013 0.791 68.7
2014 0.771 69.4
2015 0.750 70.2
2016 0.729 71.0
2017 0.709 71.8
2018 0.688 72.7
2019 0.666 73.7
2020 0.645 74.7
2021 0.623 75.8
2022 0.602 77.0
2023 0.580 78.2
2024 0.558 79.6
2025 0.536 81.0
2026 0.514 82.6
2027 0.492 84.4
2028 0.470 86.3
2029 0.449 88.4
2030 0.427 90.6

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