10121-0241 DEL   3

 
 
10h 12m 04.68s -02 41' 05.1" P.A. 256 sep 0.2 mag 11.00,12.00 Sp M2.5 dist. 12.33 pc (40.22 l.y.)
 
 
Coord 2000
10121-0241
Discov num
DEL   3
Comp
Coord arcsec 2000
10 12 04.68 -02 41 05.1
Date first
2000
Date last
2007
Obs
4
Pa first
253
Pa last
256
P.A. Now (θ)
256°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.2"
Mag pri
11.00
Mag sec
12.00
delta mag (ΔM)
1
Spectral class
M2.5 (red)
Pri motion ra
+505
Sec motion ra
Pri motion dec
-608
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
256.3
Precise sep
0.167
Constellation
Sextans
HIP
49969
Tycho2
4907-00091-1
GL
Gl 381
Distance
12.33
Distance ly
40.22
last precise pa
66.4
last precise sep
0.163
 
 
ORBITAL ELEMENTS
 
 
Period (P)6.365y± 0.027 Periastron (T)2015.502y± 0.03 Semi-major axis (a)0.2624a± 0.0051
Eccentricity (e)0.5 Inclination (i)91.8°± 0.4 Longitude of periastron (ω)94.7°± 0.8
Node (Ω)249.7°± 0.6 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.093 257.0
2001 0.211 251.9
2002 0.217 249.9
2003 0.105 71.4
2004 0.211 68.1
2005 0.108 63.9
2006 0.041 267.2
2007 0.175 253.0
2008 0.238 250.6
2009 0.050 245.1
2010 0.215 69.0
2011 0.155 66.1
2012 0.020 31.5
2013 0.130 254.7
2014 0.229 251.3
2015 0.172 249.2
2016 0.177 69.9
2017 0.192 67.4
2018 0.071 60.1
2019 0.079 258.4
2020 0.202 252.2
2021 0.227 250.1
2022 0.068 72.8
2023 0.215 68.3
2024 0.121 64.6
2025 0.028 276.1
2026 0.164 253.3
2027 0.238 250.8
2028 0.089 247.4
2029 0.210 69.2
2030 0.166 66.5

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

grafico orbita





wds10121-0241e.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
10121-0241 DEL 3 2000 1 252 0.2 10.64   M2.5 D 101204.68-024105.1
10121-0241 DEL 3 2007 2 256 0.2 11.00 12.00 M2.5 D 101204.68-024105.1

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