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Doubles in session


Current system
03187-2931
DAW 78
HD 20668


Nearby doubles
37' : 03214-2924
I 1145

39' : 03179-2855
RST1255

44' : 03201-2851
LDS 93

46' : 03199-3014
I 719

59' : 03160-2845
TDS2507

65' : 03140-2950
SKF1201

66' : 03226-3011
LDS3487

77' : 03195-2815
UC 981

82' : 03240-3014
TDS2538

84' : 03126-3000
SKF1827

86' : 03163-2811
RST 64

88' : 03252-2951
HDS 427

88' : 03124-3004
TDS2478

89' : 03121-2907
LDS5416

90' : 03195-3100
TSN 126

92' : 03129-3003
LDS 90

92' : 03121-2859
HJ 3555
Dalim

93' : 03246-3021
TDS2541

100' : 03119-3017
SEE 22

100' : 03200-3109
B 48

106' : 03180-2746
TDS 110

109' : 03113-2841
LDS5415

117' : 03184-2734
BVD 33

118' : 03249-2806
LDS5424

119' : 03262-3037
B 2082

119' : 03114-3043
TDS2471



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.

03187-2931 DAW 78 (HD 20668)

 
 
03h 18m 39.22s -29° 30' 51.9" P.A. 320.00 sep 0.0 mag 9.50,9.70 Sp F3V
 
 
Coord 2000 03187-2931 Discov num DAW  78 Comp Coord arcsec 2000 03 18 39.22 -29 30 51.9
Date first 1920 Date last 2021 Obs 14
Pa first 295 Pa last 320.4 P.A. Now (θ) 320.4°
Sep first 0.3 Sep last 0.039 Sep. Now (ρ) 0.039"
Mag pri 9.50 Mag sec 9.70 delta mag (ΔM) 0.2 Spectral class F3V (yellow-white)
Pri motion ra -007 Sec motion ra
Pri motion dec +040 Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 20668 Constellation Fornax SAO 168455 Tycho2 6445-00718-1
Gaia DR2 5058565343965278720 HD 20668
 
 
WDS 03187-2931 DAW 78 (HD 20668) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Daw1918a Ma - Dawson, B.H. .
Daw1918a Pub. La Plata Obs. 4, Pt.1, 1918
Daw1918b Ma - Dawson, B.H. (measure by Chaves, A.J.) .
Daw1918b Pub. La Plata Obs. 4, Pt.1, 1918
Daw1919 orb - Dawson, B.H. 1919AJ.....32..109D
Daw1919 AJ 32, 109, 1919
Daw1920 orb - Dawson, B.H. 1920AJ.....32..141D
Daw1920 AJ 32, 141, 1920
Daw1920b orb - Dawson, B.H. 1920AJ.....32..161D
Daw1920b AJ 32, 161, 1920
Daw1922 Ma - Dawson, B.H. .
Daw1922 Pub. La Plata Obs. 4, Pt.2, 1922
Daw1922b orb - Dawson, B.H. 1922AJ.....34...17D
Daw1922b AJ 34, 17, 1922
Daw1924a Ma - Dawson, B.H. 1924AJ.....35..147D
Daw1924a AJ 35, 147, 1924 (DAW 112 - 158; data also in Daw1937)
Daw1924b orb - Dawson, B.H. 1924AJ.....36...23D
Daw1924b AJ 36, 23, 1924
Daw1926 orb - Dawson, B.H. 1926AJ.....36..181D
Daw1926 AJ 36, 181, 1926
Daw1927A Ma - Dawson, B.H. 1927sdsc.book......
Daw1927A cited in SDS (Southern Double Star Cat.), 1927
Daw1933 orb - Dawson, B.H. 1933AJ.....43...15D
Daw1933 AJ 43, 15, 1933
Daw1937 Ma - Dawson, B.H. .
Daw1937 Pub. La Plata Obs. 6, 85, 1937
Daw9999 Ma - Dawson, B.H. ...................
Daw9999 Unpublished, manuscript or reference not found.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
03187-2931 DAW 78 1990 11 300 0.3 9.50 9.70 F3V 031839.22-293051.9
03187-2931 DAW 78 2016 12 307 0.1 9.50 9.70 F3V 031839.22-293051.9
03187-2931 DAW 78 2019 12 132 0.1 9.50 9.70 F3V 031839.22-293051.9
03187-2931 DAW 78 2020 13 134 0.1 9.50 9.70 F3V 031839.22-293051.9
03187-2931 DAW 78 2021 14 320 0.0 9.50 9.70 F3V 031839.22-293051.9

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

 
 
WDS 03187-2931 DAW 78 (HD 20668) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 03187-2931 DAW 78 (HD 20668) : MEASURES
 
 
No records found.

 
 
WDS 03187-2931 (HD 20668) : VIRTUAL EYEPIECE
 
 

03187-2931 DAW 78A mag 9.5 Sp F3V 03187-2931 DAW 78B mag 9.7 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 03187-2931 (HD 20668) : ALADIN DSS IMAGE @ 03h 18m 39.22s -29° 30' 51.9"
 
 
 
 
WDS 03187-2931 DAW 78 (HD 20668) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

03187-2931 DAW 78 distance=0' 03214-2924 I 1145 distance=37' 03179-2855 RST1255 distance=39' 03201-2851 LDS 93 distance=44' 03199-3014 I 719 distance=46' 03160-2845 TDS2507 distance=59' 03140-2950 SKF1201 distance=65' 03226-3011 LDS3487 distance=66' 03195-2815 UC 981 distance=77' 03240-3014 TDS2538 distance=82' 03126-3000 SKF1827 distance=84' 03163-2811 RST 64 distance=86' 03252-2951 HDS 427 distance=88' 03124-3004 TDS2478 distance=88' 03121-2907 LDS5416 distance=89' 03195-3100 TSN 126 distance=90' 03129-3003 LDS 90 distance=92' 03121-2859 HJ 3555 (Dalim) distance=92' 03246-3021 TDS2541 distance=93' 03119-3017 SEE 22 distance=100' 03200-3109 B 48 distance=100' 03180-2746 TDS 110 distance=106' 03113-2841 LDS5415 distance=109' 03184-2734 BVD 33 distance=117' 03249-2806 LDS5424 distance=118' 03262-3037 B 2082 distance=119' 03114-3043 TDS2471 distance=119' 03267-2834 SEE 25 distance=121' 03276-3011 TDS2552 distance=123' 03171-3133 LDS3471 distance=125' 03094-3004 LDS3460 distance=126' 03263-3057 LDS5426 distance=131' 03143-3129 TDS2491 distance=132' 03227-2714 HDS 422 distance=147' 03300-2922 RST 75 distance=149' 03123-2727 LDS 88 distance=150' 03071-2900 UC 951 distance=155' 03248-2722 LDS 839 distance=156' 03309-2926 HDS 442 distance=161' 03079-2813 LDS 86AB distance=161' 03079-2813 HDS3408AC distance=161' 03116-2719 FAR 52 distance=162' 03135-3200 TOI 926 distance=164' 03311-2959 TDS2560 distance=165' 03238-3204 RSS 64AB distance=167' 03243-2659 RST 72 distance=170' 03071-2816 LDS3455 distance=171' 03078-2750 VIG 3 distance=175' 03313-3031 RST2309 distance=176' 03103-3153 LDS5413 distance=180' 03093-2717 KPP2308 distance=182' 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 03187-2931 DAW 78 320 0.0
Show 03214-2924 I 1145 67 1.6 37
Show 03179-2855 RST1255 28 2.4 39
Show 03201-2851 LDS 93 358 253.0 44
Show 03199-3014 I 719 325 1.5 46
Show 03160-2845 TDS2507 80 0.9 59
Show 03140-2950 SKF1201 169 31.3 65
Show 03226-3011 LDS3487 253 25.0 66
Show 03195-2815 UC 981 248 20.2 77
Show 03240-3014 TDS2538 0.5 82
Show 03126-3000 SKF1827 6 3.0 84
Show 03163-2811 RST 64 242 3.9 86
Show 03252-2951 HDS 427 137 0.3 88
Show 03124-3004 TDS2478 215 0.9 88
Show 03121-2907 LDS5416 208 251.5 89
Show 03195-3100 TSN 126 130 0.6 90
Show 03129-3003 LDS 90 225 13.0 92
Show Dalim 03121-2859 HJ 3555 301 5.4 92
Show 03246-3021 TDS2541 1 0.4 93
Show 03119-3017 SEE 22 335 1.4 100
Show 03200-3109 B 48 85 2.1 100
Show 03180-2746 TDS 110 108 1.0 106
Show 03113-2841 LDS5415 119 89.1 109
Show 03184-2734 BVD 33 301 24.6 117
Show 03249-2806 LDS5424 211 21.2 118
Show 03262-3037 B 2082 194 30.2 119
Show 03114-3043 TDS2471 167 0.5 119
Show 03267-2834 SEE 25 18 10.3 121
Show 03276-3011 TDS2552 180 1.0 123
Show 03171-3133 LDS3471 49 14.3 125
Show 03094-3004 LDS3460 68 10.6 126
Show 03263-3057 LDS5426 36 32.0 131
Show 03143-3129 TDS2491 159 0.5 132
Show 03227-2714 HDS 422 228 0.2 147
Show 03300-2922 RST 75 61 1.7 149
Show 03123-2727 LDS 88 57 12.5 150
Show 03071-2900 UC 951 180 60.3 155
Show 03248-2722 LDS 839 201 7.5 156
Show 03309-2926 HDS 442 4 0.7 161
Show 03079-2813 LDS 86 AB 208 66.6 161
Show 03079-2813 HDS3408 AC 96 37.4 161
Show 03116-2719 FAR 52 18 0.1 162
Show 03135-3200 TOI 926 159 0.2 164
Show 03311-2959 TDS2560 162 0.4 165
Show 03238-3204 RSS 64 AB 265 27.2 167
Show 03243-2659 RST 72 60 1.1 170
Show 03071-2816 LDS3455 281 252.7 171
Show 03078-2750 VIG 3 29 6.1 175
Show 03313-3031 RST2309 107 1.0 176
Show 03103-3153 LDS5413 268 209.1 180
Show 03093-2717 KPP2308 110 19.5 182

 
 
WDS 03187-2931 : COMPONENTS
 
 
  A
B pa=324.2°
sep=0.04"
 
 
03187-2931 A
 
 
Componente originario normalizzato AB Name HD 20668 Coord arcsec 2000 031839.22-293051.9 Mag 9.5
Spectral class F3V (yellow-white) PmRA -7.00 PmDE 40.0 SAO 168455
Tycho2 6445-00718-1 HD 20668 DM CD-29 1220
Tycho2
Tycho2 6445-00718-1 Pflag RAmdeg 49.66345322 DEmdeg -29.51442305
PmRA -3.0 PmDE 41.0 E RAmdeg 8 E DEmdeg 6
E pmRA 1.4 E pmDE 1.3 EpRAm 1990.75 EpDEm 1991.22
Num 8 Q RAmdeg 1.5 Q DEmdeg 0.8 Q pmRA 1.5
Q pmDE 0.9 BTmag 9.471 E BTmag 0.017 VTmag 8.998
E VTmag 0.013 Prox 999 TYC T HIP
CCDM RAdeg 49.66346139 DEdeg -29.51451722 EpRA 1990 1.73
EpDE 1990 1.72 E RAdeg 7.5 E DEdeg 6.4 Posflg
Corr 0.1
SAO
SAO 168455 DelFlag RA1950 PmRA1950 -0.0002
DE1950 PmDE1950 0.051 Vmag 8.7 SpType F5
Double code Source 24 CatNum 1278 DM CD-29 1220
DMcomp BDsup HD 20668 M HD 0
GC RA1950rad 0.85770811 DE1950rad -0.51829481 PmRA2000 0.0001
PmDE2000 0.048
CCDM
Ccdm 03187-2931 RComp Comp A Note1
Note2 Discov num DRAs -2.74 DDEs 8.9
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.5 Sp F5 PmNote *
PmRA -3 PmDE 51 Dm number -29 1220 Cat1 CD
Name2 168455 Cat2 SAO HD 20668 M HD
ADS BDS A 2467 M ADS BDS N IDS IDS 03145S2953A
HIC
 
 
03187-2931 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 031839.22-293051.9 Mag 9.7 Calc delta mag 0.2
Calc coord yes
CCDM
Ccdm 03187-2931 RComp Comp B Note1
Note2 Discov num DAW 78 DRAs DDEs
R dRAs Year 1959 Theta 120 Rho 0.1
Obs 7 Vmag 9.7 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 2467 M ADS BDS N N IDS IDS 03145S2953B
HIC