02158-1814 HTG   1

 
 
02H 15M 46.15S -18 14' 17.7" P.A. 164.7 SEP 1.93 MAG 8.49,9.25 SP K3V DIST. 23.15 PC (75.52 L.Y.)
 
 
Coord 2000
02158-1814
Discov num
HTG   1
Comp
Coord arcsec 2000
02 15 46.15 -18 14 17.7
Date first
1879
Date last
2014
Obs
92
Pa first
312
Pa last
163
P.A. Now (θ)
164.7°
Sep first
2.2
Sep last
2.0
Sep. Now (ρ)
1.93"
Mag pri
8.49
Mag sec
9.25
delta mag (ΔM)
0.76
Spectral class
K3V (yellow-orange)
Pri motion ra
-052
Sec motion ra
-052
Pri motion dec
-135
Sec motion dec
-135
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cetus
SAO
148298
HIP
10542
Tycho2
5859-01144-1
HD
14001
ADS
1733
GL
Gl 91.2A
BD
BD-18 394
Distance
23.15
Distance ly
75.52
last precise pa
162.5
last precise sep
1.97
 
 
ORBITAL ELEMENTS
 
 
Period (P)295.93y Periastron (T)1681.32y Semi-major axis (a)2.184a
Eccentricity (e)0.151 Inclination (i)35.5° Longitude of periastron (ω)270.2°
Node (Ω)187.1° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 1.691 140.4
2001 1.704 142.0
2002 1.718 143.6
2003 1.732 145.2
2004 1.746 146.7
2005 1.760 148.2
2006 1.774 149.7
2007 1.789 151.2
2008 1.803 152.6
2009 1.817 154.1
2010 1.831 155.5
2011 1.845 156.8
2012 1.859 158.2
2013 1.873 159.5
2014 1.887 160.9
2015 1.901 162.2
2016 1.914 163.5
2017 1.927 164.7
2018 1.940 166.0
2019 1.953 167.2
2020 1.966 168.4
2021 1.978 169.6
2022 1.990 170.8
2023 2.002 172.0
2024 2.013 173.1
2025 2.025 174.3
2026 2.036 175.4
2027 2.046 176.5
2028 2.056 177.6
2029 2.066 178.7
2030 2.076 179.8

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