01388-1758 LDS 838 (UV Cet)

 
 
01h 39m 01.54s -17 57' 01.8" P.A. 333.00 sep 1.7 mag 12.70,13.20 Sp M5.5V+M6V
 
 
Coord 2000 01388-1758 Discov num LDS 838 Comp Coord arcsec 2000 01 39 01.54 -17 57 01.8
Date first 1935 Date last 2021 Obs 122
Pa first 118 Pa last 333.4 P.A. Now (θ) 318.7°
Sep first 2.0 Sep last 1.723 Sep. Now (ρ) 1.255"
Mag pri 12.70 Mag sec 13.20 delta mag (ΔM) 0.5 Spectral class M5.5V+M6V (red/red)
Pri motion ra +339 Sec motion ra +330
Pri motion dec +056 Sec motion dec +056
Notes N O P (See Notes, Orbital solution, 100-year proper motion)
rPM=0.026 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name UV Cet Constellation Cetus
 
 
ORBITAL ELEMENTS
 
 
Period (P)26.359y± 0.025 Periastron (T)60591.9d (2024.771y)± 9.4 Semi-major axis (a)2049.6m± 3.4
Eccentricity (e)0.6222± 0.0015 Inclination (i)128.09°± 0.15 Longitude of periastron (ω)283.34°± 0.085
Node (Ω)146.29°± 0.14 Notesn ReferenceMnA2019
Equinox Last observation2015 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 140.6 1.192
2001 124.7 1.432
2002 112.5 1.571
2003 101.9 1.661
2004 92.2 1.727
2005 83.2 1.783
2006 74.8 1.835
2007 66.8 1.888
2008 59.2 1.942
2009 52.1 1.997
2010 45.3 2.053
2011 38.9 2.107
2012 32.8 2.159
2013 27.0 2.204
2014 21.4 2.242
2015 15.9 2.268
2016 10.6 2.279
2017 5.2 2.270
2018 359.8 2.236
2019 354.1 2.170
2020 347.9 2.060
2021 340.9 1.890
2022 332.0 1.636
2023 318.7 1.255
2024 288.4 0.714
2025 192.8 0.578
2026 148.4 1.063
2027 129.8 1.362
2028 116.6 1.529
2029 105.5 1.632
2030 95.6 1.705


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



 
 


wds01388-1758d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic