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Doubles in session


Current system
00284-2020
B 1909


Nearby doubles
33' : 00280-2053
ARA1251

44' : 00263-1948
CVR 320

44' : 00253-2020
LDS2119

51' : 00320-2013
DON 6

52' : 00278-1929
DON 5

62' : 00266-1924
ARA 515

67' : 00279-1914
ARA 516

70' : 00327-1948
UC 388

74' : 00302-1912
GWP 55

78' : 00334-2052
B 1911

79' : 00235-2100
LDS2118

79' : 00288-1902
ITF 157

82' : 00313-1909
B 6

85' : 00239-2116
LDS 15

87' : 00333-1930
HJ 1984

87' : 00345-2030
LDS2136

88' : 00231-2106
CVR 316

88' : 00221-2014
CVR1038

90' : 00345-2042
SLW 31

93' : 00347-2043
UC 396

100' : 00256-1849
HJ 1964

107' : 00323-2151
CBL 114

108' : 00306-1837
BVD 12

111' : 00334-1856
CVR1046

113' : 00361-2046
B 2066AB

115' : 00333-2151
LDS1077



Selections
Full WDS
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.

00284-2020 B  1909

 
 
00h 28m 21.17s -20° 20' 05.2" P.A. 307.20 sep 0.2 mag 7.23,7.40 Sp G0V dist. 32.2 pc (105.04 l.y.)
 
 
Coord 2000
00284-2020
 Discov num
B  1909
 Comp
Coord arcsec 2000
00 28 21.17 -20 20 05.2
Date first
1929
 Date last
2020
 Obs
91
Pa first
119
 Pa last
307
 P.A. Now (θ)
307.2°
Sep first
0.2
 Sep last
0.2
 Sep. Now (ρ)
0.19"
Mag pri
7.23
 Mag sec
7.40
 delta mag (ΔM)
0.17
 Spectral class
G0V (yellow)
Pri motion ra
-116
 Sec motion ra
Pri motion dec
-114
 Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
307.2
 Precise sep
0.191
 Constellation
Cetus
 SAO
166296
HIP
2237
 Tycho2
5846-00959-1
 Gaia DR2
2363291052952046208
 HD
2475
HR
108
 BD
BD-21 57
 Distance
32.2
 Distance ly
105.04
last precise pa
307.2
 last precise sep
0.191
 
 
ORBITAL ELEMENTS
 
 
Period (P)11.35y Periastron (T)1995.09y Semi-major axis (a)0.202a
Eccentricity (e)0.005 Inclination (i)69.8° Longitude of periastron (ω)99°
Node (Ω)119.49° Note Grade1(1=Definitive, 9=Indet.)
Equinox2000 Last observation2009
label rho theta
2000 0.086 351.6
2001 0.088 69.9
2002 0.157 102.1
2003 0.199 115.8
2004 0.190 127.1
2005 0.133 144.0
2006 0.071 195.0
2007 0.110 265.3
2008 0.176 287.7
2009 0.202 299.8
2010 0.175 311.9
2011 0.109 334.7
2012 0.072 44.8
2013 0.134 94.7
2014 0.190 111.7
2015 0.199 123.0
2016 0.157 136.6
2017 0.087 169.2
2018 0.086 248.7
2019 0.156 282.1
2020 0.199 295.9
2021 0.190 307.2
2022 0.134 324.1
2023 0.073 13.6
2024 0.109 84.0
2025 0.175 107.0
2026 0.202 119.1
2027 0.177 131.0
2028 0.111 153.0
2029 0.071 222.4
2030 0.132 274.5


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


 
  


wds00284-2020a.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
00284-2020 B 1909 1999 71 156 0.1 7.23 7.40 G0V NOD 002821.17-202005.2
00284-2020 B 1909 2008 77 297 0.2 7.23 7.40 G0V NOD 002821.17-202005.2
00284-2020 B 1909 2010 80 337 0.1 7.23 7.40 G0V NOD 002821.17-202005.2
00284-2020 B 1909 2014 83 301 0.2 7.23 7.40 G0V NO 002821.17-202005.2
00284-2020 B 1909 2015 84 137 0.2 7.23 7.40 G0V NO 002821.17-202005.2
00284-2020 B 1909 2018 89 272 0.1 7.23 7.40 G0V NO 002821.17-202005.2
00284-2020 B 1909 2019 90 291 0.2 7.23 7.40 G0V NO 002821.17-202005.2

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