20526-1609 SPF   2

 
 
20h 52m 35.31s -16 09' 29.8" P.A. 193.2 sep 0.12 mag 15.57,16.30 Sp L6.0+T2.0
 
 
Coord 2000
20526-1609
Discov num
SPF   2
Comp
Coord arcsec 2000
20 52 35.31 -16 09 29.8
Date first
2005
Date last
2010
Obs
6
Pa first
13
Pa last
79
P.A. Now (θ)
193.2°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.12"
Mag pri
15.57
Mag sec
16.30
delta mag (ΔM)
0.73
Spectral class
L6.0+T2.0 (very deep red/brown dwarf)
Pri motion ra
Sec motion ra
Pri motion dec
Sec motion dec
Notes
N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
78.7
Precise sep
0.106
Cdsa2 id
SPF 2
Constellation
Capricornus
Ra deg
20.876475
De deg
-16.158277777777776
last precise pa
78.7
last precise sep
0.106
 
 
ORBITAL ELEMENTS
 
 
Period (P)32y Periastron (T)53654.31d (2005.776y) Semi-major axis (a)0.147a
Eccentricity (e)0.005 Inclination (i)45° Longitude of periastron (ω)98°
Node (Ω)327° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation2010
label rho theta
2000 0.136 351.2
2001 0.128 1.1
2002 0.119 12.4
2003 0.111 25.4
2004 0.106 40.0
2005 0.103 55.8
2006 0.105 71.7
2007 0.110 86.6
2008 0.118 99.9
2009 0.127 111.4
2010 0.135 121.5
2011 0.141 130.5
2012 0.145 138.9
2013 0.147 146.9
2014 0.146 154.9
2015 0.142 163.2
2016 0.136 172.1
2017 0.128 182.0
2018 0.120 193.2
2019 0.112 206.1
2020 0.107 220.6
2021 0.104 236.1
2022 0.106 251.7
2023 0.111 266.3
2024 0.119 279.3
2025 0.127 290.7
2026 0.135 300.7
2027 0.141 309.7
2028 0.146 318.1
2029 0.147 326.1
2030 0.146 334.1

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

grafico orbita





wds20526-1609a.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
20526-1609 SPF 2 2009 2 67 0.1 15.57 16.30 T1 T2.5 N DK 205235.31-160929.8
20526-1609 SPF 2 2010 6 79 0.1 15.57 16.30 L6.0+T2.0 NO K 205235.31-160929.8

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