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Current system
00569-5153
B 1418
BW Phe


Nearby doubles
18' : 00573-5135
NSN 214

44' : 01001-5120
TDS1711

49' : 00529-5123
RST 22

55' : 01007-5235
I 49

64' : 00501-5159
SHN 60

74' : 00491-5203
RST 18

80' : 00484-5202
SHN 59

83' : 00525-5041
CPO 107

85' : 00550-5315
RST 23

91' : 00537-5319
KPP1052

93' : 00471-5214
TDS1611

94' : 00568-5326
B 646

95' : 00468-5200
HJ 3398

97' : 01067-5227
KPP 893

108' : 00455-5138
CVN 34

108' : 01018-5015
HJ 3414

112' : 00492-5028
UC 446

115' : 00517-5009
B 1414

115' : 01082-5241
FIN 69

116' : 01056-5317
UC 498

119' : 01066-5312
UC 500

121' : 00547-4954
RST2252

137' : 01099-5300
MED 10

141' : 00423-5234
RST 15

141' : 00417-5155
TDS1570

147' : 00547-4928
B 1416



Selections
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Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

00569-5153 B 1418 (BW Phe)

 
 
00h 56m 55.38s -51° 52' 32.0" P.A. 94.00 sep 0.2 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 2023 Obs 16
Pa first 100 Pa last 94.3 P.A. Now (θ) 96.3°
Sep first 0.3 Sep last 0.19 Sep. Now (ρ) 0.246"
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)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name BW Phe Constellation Phoenix SAO 232234 HIP 4448
Tycho2 8037-00492-1 Gaia DR2 4928347433108236416 HD 5578 CP CP-52 125
Distance 40.63 Distance ly 132.54
 
 
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 Notes ReferenceTok2019c
Equinox Last observation2018 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 342.3 0.020
2001 78.5 0.054
2002 89.3 0.108
2003 92.9 0.159
2004 94.9 0.203
2005 96.1 0.240
2006 97.1 0.268
2007 97.9 0.286
2008 98.7 0.294
2009 99.4 0.289
2010 100.2 0.270
2011 101.2 0.236
2012 102.6 0.183
2013 105.6 0.111
2014 130.5 0.023
2015 273.4 0.075
2016 279.0 0.137
2017 282.0 0.143
2018 285.8 0.110
2019 295.2 0.060
2020 14.1 0.018
2021 81.8 0.063
2022 90.2 0.118
2023 93.3 0.167
2024 95.1 0.210
2025 96.3 0.246
2026 97.3 0.272
2027 98.1 0.288
2028 98.8 0.294
2029 99.5 0.287
2030 100.3 0.265
2031 101.4 0.228
2032 102.9 0.172
2033 106.7 0.096
2034 180.3 0.011
2035 275.0 0.090
2036 279.6 0.142
2037 282.6 0.140
2038 286.8 0.102
2039 299.0 0.050
2040 42.7 0.022
2041 84.3 0.073
2042 90.9 0.127
2043 93.7 0.176
2044 95.4 0.217
2045 96.5 0.251
2046 97.4 0.276
2047 98.2 0.290
2048 98.9 0.294
2049 99.7 0.284
2050 100.5 0.260


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds00569-5153a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic