00569-5153 B  1418 (BW Phe)

 
 
00h 56m 55.38s -51 52' 32.0" P.A. 14.10 sep 0.0 mag 9.77,10.02 Sp K3/4V dist. 40.63 pc (132.54 l.y.)
 
 
Coord 2000
00569-5153
Discov num
B  1418
Comp
Coord arcsec 2000
00 56 55.38 -51 52 32.0
Date first
1928
Date last
2019
Obs
12
Pa first
100
Pa last
317
P.A. Now (θ)
14.1°
Sep first
0.3
Sep last
0.0
Sep. Now (ρ)
0.02"
Mag pri
9.77
Mag sec
10.02
delta mag (ΔM)
0.25
Spectral class
K3/4V (yellow-orange)
Pri motion ra
+096
Sec motion ra
Pri motion dec
-007
Sec motion dec
Notes
O (Orbital solution)
Visually invisible, K-band or other infrared star This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
317
Precise sep
0.032
Var name
BW Phe
Constellation
Phoenix
SAO
232234
HIP
4448
Tycho2
8037-00492-1
Gaia DR2
33108236416
HD
5578
CP
CP-52 125
Distance
40.63
Distance ly
132.54
last precise pa
317
last precise sep
0.032
 
 
ORBITAL ELEMENTS
 
 
Period (P)19.82y± 0.54 Periastron (T)2015.44y± 0.2 Semi-major axis (a)0.227a± 0.012
Eccentricity (e)0.404± 0.054 Inclination (i)85.8°± 0.6 Longitude of periastron (ω)323.3°± 7.3
Node (Ω)279.8°± 0.5 Note Grade2(1=Definitive, 9=Indet.)
Equinox Last observation2018
label rho theta
2000 0.020 342.3
2001 0.054 78.5
2002 0.108 89.3
2003 0.159 92.9
2004 0.203 94.9
2005 0.240 96.1
2006 0.268 97.1
2007 0.286 97.9
2008 0.294 98.7
2009 0.289 99.4
2010 0.270 100.2
2011 0.236 101.2
2012 0.183 102.6
2013 0.111 105.6
2014 0.023 130.5
2015 0.075 273.4
2016 0.137 279.0
2017 0.143 282.0
2018 0.110 285.8
2019 0.060 295.2
2020 0.018 14.1
2021 0.063 81.8
2022 0.118 90.2
2023 0.167 93.3
2024 0.210 95.1
2025 0.246 96.3
2026 0.272 97.3
2027 0.288 98.1
2028 0.294 98.8
2029 0.287 99.5
2030 0.265 100.3

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






wds00569-5153a.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
00569-5153 B 1418 1991 5 93 0.2 9.77 10.02 K3/4V 005655.38-515232.0
00569-5153 B 1418 2015 7 279 0.1 9.77 10.02 K3/4V 005655.38-515232.0
00569-5153 B 1418 2017 9 284 0.1 9.77 10.02 K3/4V 005655.38-515232.0
00569-5153 B 1418 2018 10 290 0.1 9.77 10.02 K3/4V 005655.38-515232.0
00569-5153 B 1418 2019 12 317 0.0 9.77 10.02 K3/4V O 005655.38-515232.0

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