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Doubles in session


Current system
00284-2020
B 1909
HD 2475


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 (HD 2475)

 
 
00h 28m 21.17s -20° 20' 05.2" P.A. 321.00 sep 0.1 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 2021 Obs 92
Pa first 119 Pa last 320.5 P.A. Now (θ) 13.6°
Sep first 0.2 Sep last 0.143 Sep. Now (ρ) 0.073"
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
 
 
Name HD 2475 Constellation Cetus SAO 166296 HIP 2237
Tycho2 5846-00959-1 Gaia DR2 2363291052952046208 HD 2475 HR 108
GC 554 BD BD-21 57 FK5 2029 Distance 32.2
Distance ly 105.04
 
 
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° Notesn ReferenceHrt2010a
Equinox2000 Last observation2009 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 351.6 0.086
2001 69.9 0.088
2002 102.1 0.157
2003 115.8 0.199
2004 127.1 0.190
2005 144.0 0.133
2006 195.0 0.071
2007 265.3 0.110
2008 287.7 0.176
2009 299.8 0.202
2010 311.9 0.175
2011 334.7 0.109
2012 44.8 0.072
2013 94.7 0.134
2014 111.7 0.190
2015 123.0 0.199
2016 136.6 0.157
2017 169.2 0.087
2018 248.7 0.086
2019 282.1 0.156
2020 295.9 0.199
2021 307.2 0.190
2022 324.1 0.134
2023 13.6 0.073
2024 84.0 0.109
2025 107.0 0.175
2026 119.1 0.202
2027 131.0 0.177
2028 153.0 0.111
2029 222.4 0.071
2030 274.5 0.132


 
 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 00284-2020 B 1909 (HD 2475) : NOTES
 
 
discov_num notes refcode
B 1909 Difficult visual system, with two components remaining within 0".2
of each other throughout the orbit.
Two orbit solutions (van den Bos 1956, Soedehjelm 1999). High- B__1956b
eccentricity, half-period solution fits equally well but gives Sod1999
too high mass-sum (with no third component allowed by q).
1982.7657 autocorrelogram remeasured; new results listed in catalog. McA1987b
Martin et al. (1998) derive component masses 1.563 +/- 0.177 and
1.238 +/- 0.151 Msun. Mig1998
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 2.14 +/- 0.32, 2.15, and 1.05 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
B__1956b orb - van den Bos, W.H. 1956CiUO..115..279V
B__1956b Union Obs. Johannesburg Circ. 115, 279-284, 1956
Hrt2010a orb - Hartkopf, W.I. & Mason, B.D. 2010IAUDS.170....1H
Hrt2010a Inf. Circ. 170, 1, 2010
McA1987b Sc j McAlister, H.A., Hartkopf, W.I., Hutter, D.J., & Franz, O.G. 1987AJ.....93..688M
McA1987b AJ 93, 688, 1987
Mig1998 orb - Martin, Ch., Mignard, F., Hartkopf, W.I., & McAlister, H.A. 1998A&AS..133..149M
Mig1998 A&AS 133, 149, 1998
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Sod1999 orb - Soderhjelm, S. 1999A&A...341..121S
Sod1999 A&A 341, 121, 1999
 
 
DISCOVERER
 
 
idgroup discov author
1 B van den Bos, W.H.
 
 
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
00284-2020 B 1909 2020 91 307 0.2 7.23 7.40 G0V NO 002821.17-202005.2
00284-2020 B 1909 2021 92 321 0.1 7.23 7.40 G0V NO 002821.17-202005.2

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 00284-2020 B 1909 (HD 2475) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 00284-2020 B 1909 (HD 2475) : MEASURES
 
 
No records found.

 
 
WDS 00284-2020 (HD 2475) : VIRTUAL EYEPIECE
 
 

00284-2020 B 1909A mag 7.23 Sp G0V 00284-2020 B 1909B sep 0.1 P.A. 322.30 mag 7.4 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 00284-2020 (HD 2475) : ALADIN DSS IMAGE @ 00h 28m 21.17s -20° 20' 05.2"
 
 
 
 
WDS 00284-2020 B 1909 (HD 2475) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

00284-2020 B 1909 distance=1' 00280-2053 ARA1251 distance=33' 00263-1948 CVR 320 distance=44' 00253-2020 LDS2119 distance=44' 00320-2013 DON 6 distance=51' 00278-1929 DON 5 distance=52' 00266-1924 ARA 515 distance=62' 00279-1914 ARA 516 distance=67' 00327-1948 UC 388 distance=70' 00302-1912 GWP 55 distance=74' 00334-2052 B 1911 distance=78' 00235-2100 LDS2118 distance=79' 00288-1902 ITF 157 distance=79' 00313-1909 B 6 distance=82' 00239-2116 LDS 15 distance=85' 00333-1930 HJ 1984 distance=87' 00345-2030 LDS2136 distance=87' 00231-2106 CVR 316 distance=88' 00221-2014 CVR1038 distance=88' 00345-2042 SLW 31 distance=90' 00347-2043 UC 396 distance=93' 00256-1849 HJ 1964 distance=100' 00323-2151 CBL 114 distance=107' 00306-1837 BVD 12 distance=108' 00334-1856 CVR1046 distance=111' 00361-2046 B 2066AB distance=113' 00333-2151 LDS1077 distance=115' 00199-2011 ARA 824 distance=120' 00278-2220 HJ 1969 distance=121' 00290-1817 HJ 1974 distance=124' 00336-2205 CVR 333 distance=128' 00371-2100 LDS2138 distance=128' 00196-2057 HJ 1954 distance=130' 00234-1831 LDS3161 distance=130' 00374-2054 FAR 23 distance=132' 00369-1920 CVR 338 distance=135' 00321-1813 B 1910 distance=138' 00374-1925 SLW 34 distance=140' 00338-1822 UC 392 distance=141' 00368-2136 SLW 33 distance=142' 00359-1847 TDS 22 distance=143' 00385-2003 BRT 295 distance=144' 00183-2108 BU 393 distance=150' 00353-1825 HDS 78 distance=151' 00292-1750 HU 1203 distance=152' 00180-1942 LDS 10AB distance=152' 00180-1942 ARA2324AC distance=152' 00386-2118 LDS2140 distance=154' 00380-2136 HJ 1990 distance=155' 00256-1749 VOU 29 distance=156' 00307-1746 GWP 56 distance=158' grafico limitrofi
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(')
Show 00284-2020 B 1909 321 0.1 1
Show 00280-2053 ARA1251 202 18.6 33
Show 00263-1948 CVR 320 280 13.9 44
Show 00253-2020 LDS2119 79 5.1 44
Show 00320-2013 DON 6 220 3.3 51
Show 00278-1929 DON 5 344 0.5 52
Show 00266-1924 ARA 515 337 16.1 62
Show 00279-1914 ARA 516 262 10.1 67
Show 00327-1948 UC 388 64 21.6 70
Show 00302-1912 GWP 55 299 24.3 74
Show 00334-2052 B 1911 313 0.8 78
Show 00235-2100 LDS2118 132 4.6 79
Show 00288-1902 ITF 157 268 4.3 79
Show 00313-1909 B 6 265 0.2 82
Show 00239-2116 LDS 15 316 84.5 85
Show 00333-1930 HJ 1984 29 17.1 87
Show 00345-2030 LDS2136 186 209.2 87
Show 00231-2106 CVR 316 338 8.3 88
Show 00221-2014 CVR1038 86 4.6 88
Show 00345-2042 SLW 31 271 13.0 90
Show 00347-2043 UC 396 102 34.5 93
Show 00256-1849 HJ 1964 116 6.6 100
Show 00323-2151 CBL 114 209 49.7 107
Show 00306-1837 BVD 12 314 143.7 108
Show 00334-1856 CVR1046 290 4.9 111
Show 00361-2046 B 2066 AB 230 7.0 113
Show 00333-2151 LDS1077 335 15.0 115
Show 00199-2011 ARA 824 294 10.5 120
Show 00278-2220 HJ 1969 44 12.5 121
Show 00290-1817 HJ 1974 159 23.9 124
Show 00336-2205 CVR 333 134 9.8 128
Show 00371-2100 LDS2138 260 2.8 128
Show 00196-2057 HJ 1954 112 32.4 130
Show 00234-1831 LDS3161 148 9.0 130
Show 00374-2054 FAR 23 105 0.3 132
Show 00369-1920 CVR 338 111 12.4 135
Show 00321-1813 B 1910 30 0.2 138
Show 00374-1925 SLW 34 153 177.0 140
Show 00338-1822 UC 392 230 132.5 141
Show 00368-2136 SLW 33 146 66.6 142
Show 00359-1847 TDS 22 185 1.2 143
Show 00385-2003 BRT 295 270 3.7 144
Show 00183-2108 BU 393 29 0.7 150
Show 00353-1825 HDS 78 275 1.3 151
Show 00292-1750 HU 1203 193 2.0 152
Show 00180-1942 LDS 10 AB 254 16.0 152
Show 00180-1942 ARA2324 AC 315 24.8 152
Show 00386-2118 LDS2140 207 362.6 154
Show 00380-2136 HJ 1990 354 17.4 155
Show 00256-1749 VOU 29 257 0.8 156
Show 00307-1746 GWP 56 227 54.8 158

 
 
WDS 00284-2020 : COMPONENTS
 
 
  A
B pa=322.3°
sep=0.14"
 
 
00284-2020 A
 
 
Componente originario normalizzato AB Name HD 2475 Coord arcsec 2000 002821.17-202005.2 Mag 7.23
Spectral class G0V (yellow) PmRA -116.00 PmDE -114.0 SAO 166296
HIP 2237 Tycho2 5846-00959-1 HD 2475 HR 108
GC 554 BD BD-21 57 FK5 2029
Tycho2
Tycho2 5846-00959-1 Pflag RAmdeg 7.08789398 DEmdeg -20.33505803
PmRA -121.0 PmDE -116.2 E RAmdeg 4 E DEmdeg 4
E pmRA 0.9 E pmDE 0.8 EpRAm 1991.24 EpDEm 1991.15
Num 19 Q RAmdeg 1.8 Q DEmdeg 1.0 Q pmRA 1.8
Q pmDE 1.0 BTmag 7.153 E BTmag 0.015 VTmag 6.505
E VTmag 0.010 Prox 999 TYC T HIP 2237
CCDM AB RAdeg 7.08818861 DEdeg -20.33478861 EpRA 1990 1.78
EpDE 1990 1.65 E RAdeg 3.9 E DEdeg 4.2 Posflg P
Corr -0.2
SAO
SAO 166296 DelFlag RA1950 PmRA1950 -0.0082
DE1950 PmDE1950 -0.105 Vmag 6.4 SpType G0
Double code Source 70 CatNum 554 DM BD-21 57
DMcomp BDsup HD 2475 M HD 0
GC 554 RA1950rad 0.11277112 DE1950rad -0.35970947 PmRA2000 -0.008
PmDE2000 -0.109
Hipparcos
Catalog H HIP 2237 Proxy H RAhms 00 28 21.17
DEdms -20 20 05.2 Vmag 6.44 VarFlag R Vmag H
RAdeg 7.08821 DEdeg -20.3348 AstroRef * Plx 31.01
CCDM 00284-2020 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AB
Theta 120 Rho 0.187 HD 2475 BD BD-21 57
CD CP Dm number -21 57 VIred 0.62
SpType G3V R SpType Coord arcsec 2000 002821.17-202005.2
Hipparcos 2
HIP 2237 Sn 55 So 3 Nc 2
RArad 0.1237125367 DErad -0.3549088108 Plx 31.06 PmRA -118.98
PmDE -112.03 E RArad 0.53 E DErad 0.43 E Plx 0.68
E pmRA 0.73 E pmDE 0.46 Hpmag 6.5582 E Hpmag 0.0013
SHp 0.009 VA 0 BV 0.594 E BV 0.002
VI 0.62
CCDM
Ccdm 00284-2020 RComp Comp A Note1
Note2 Discov num DRAs -2.91 DDEs -6.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.2 Sp G0 PmNote *
PmRA -120 PmDE -117 Dm number -21 57 Cat1 BD
Name2 166296 Cat2 SAO HD 2475 M HD
ADS BDS M ADS BDS N IDS IDS 00233S2053A
HIC 2237
 
 
00284-2020 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 002821.16-202005.1 Mag 7.4 Calc delta mag 0.17
Calc coord yes
CCDM
Ccdm 00284-2020 RComp Comp B Note1 *
Note2 Discov num B 1909 DRAs DDEs
R dRAs Year 1929 Theta Rho
Obs 99 Vmag 7.2 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 00233S2053B
HIC 2237