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Doubles in session


Current system
20487-4359
DON 993 AB


Nearby doubles
3' : 20485-4359
DON 992

49' : 20452-4428
BRT1114

52' : 20441-4412
KPP1048AB

65' : 20427-4400
KPP3106

78' : 20555-4426
I 1430

94' : 20533-4519
SKF1169

95' : 20400-4359
DON 990AB

96' : 20476-4534
I 1427

98' : 20578-4402
DON 995

100' : 20571-4439
LDS 729

102' : 20568-4452
HDS2984

102' : 20417-4253
TDT2475

105' : 20391-4345
LDS 717

105' : 20583-4345
I 1048

113' : 20385-4425
I 1424

122' : 20454-4554
RST1076

126' : 20389-4253
AOT 88

128' : 20409-4224
HJ 5211AB

132' : 20372-4445
TOK 369

133' : 20561-4213
UC 4335

134' : 21008-4429
TDT2693

134' : 20381-4251
UC 4240

136' : 21011-4426
HJ 5238

137' : 20411-4549
SKF1166

137' : 20556-4204
BRT1116

138' : 20536-4153
BRT1115



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.

20487-4359 DON 993 AB

 
 
20h 48m 44.12s -43° 58' 58.4" P.A. 332.00 sep 12.2 mag 7.71,15.00 Sp F3V
 
 
Coord 2000 20487-4359 Discov num DON 993 Comp AB Coord arcsec 2000 20 48 44.12 -43 58 58.4
Date first 1932 Date last 2016 Obs 7
Pa first 330 Pa last 331.9 P.A. Now (θ) 331.9°
Sep first 11.6 Sep last 12.189 Sep. Now (ρ) 12.189"
Mag pri 7.71 Mag sec 15.00 delta mag (ΔM) 7.29 Spectral class F3V (yellow-white)
Pri motion ra +008 Sec motion ra
Pri motion dec +022 Sec motion dec
Notes
Nature of this double is uncertain.
 
 
20487-4359 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 230382 20 48 44 -43 58 58 DON 993 AB 2016 7 332 12.2 7.71 15.00 7.29 <===
Show 230382 20 48 44 -43 58 58 HJ 5222 AC 2015 7 271 28.6 7.71 12.57 4.86
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Microscopium SAO 230382 Tycho2 7975-01337-1 Gaia DR2 6676695234806426752
HD 197971 GC 28990
 
 
WDS 20487-4359 DON 993 AB : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Don1937 Ma j Donner, H.F. 1937MmRAS..65...51R
Don1937 MemRAS 65, 51, 1937
Don1955 Ma - Donner, H.F. 1955POMic..11....1R
Don1955 Pub. Univ. Michigan Obs. 11, 1, 1955
Don1964 Ma j Donner, H.F. 1964POMic...9...73R
Don1964 Pub. Univ. Michigan Obs. 9, 73, 1964
HJ_1826 Mb - Herschel, J.F.W. 1826MmRAS...2..459H
HJ_1826 MemRAS 2, 459, 1826
HJ_1829a Mb - Herschel, J.F.W. 1829MmRAS...3...47H
HJ_1829a MemRAS 3, 47, 1829
HJ_1829b Mb - Herschel, J.F.W. 1829MmRAS...3..177H
HJ_1829b MemRAS 3, 177, 1829
HJ_1831 Ma - Herschel, J.F.W. 1831MmRAS...4..331H
HJ_1831 +Mb MemRAS 4, part 2, 331, 1831
HJ_1833a Ma - Herschel, J.F.W. 1833MmRAS...5...13H
HJ_1833a +Mb MemRAS 5, 13, 1833
HJ_1833b orb - Herschel, J.F.W. 1833MmRAS...5..171H
HJ_1833b MemRAS 5, 171, 1833
HJ_1833c Mb - Herschel, J.F.W. 1833MmRAS...6....1H
HJ_1833c MemRAS 6, 1, 1833
HJ_1833d orb - Herschel, J.F.W. 1833MmRAS...6..149H
HJ_1833d MemRAS 6, 149, 1833
HJ_1835 Ma - Herschel, J.F.W. 1835MmRAS...8...37H
HJ_1835 +Mb MemRAS 8, 37, 1835
HJ_1836 Mb - Herschel, J.F.W. 1836MmRAS...9..193H
HJ_1836 MemRAS 9, 193, 1836
HJ_1847a Ma j Herschel, J.F.W. .
HJ_1847a +Mb Cape Results, London, 1847 (Cape of Good Hope Astronomical Observations 1834-1838)
HJ_1847b Ma j Herschel, J.F.W. .
HJ_1847b Cape Results, London, 1847
HJ_1850 orb - Herschel, J.F.W. 1850MmRAS..18...47H
HJ_1850 MemRAS 18, 47, 1850
HJ_1870 Mb - Herschel, J.F.W. 1870MmRAS..38....1H
HJ_1870 MemRAS 38, 1, 1870
HJ_1874A - Herschel, J.F.W. 1874MNRAS..35...28B
HJ_1874A cited by Burnham (MNRAS 35, 28, 1874)
HJ_1875A Ma - Herschel, J.F.W. 1875AN.....85..323D
HJ_1875A +Mb cited by Doberck, 1875 (see Dob1875b,f,g,h)
HJ_1880A Ma - Herschel, J.F.W. 1880Obs.....3..508G
HJ_1880A +Mb cited by Gledhill (Obs 3, 508, 1880)
HJ_1880B Mb - Herschel, J.F.W. 1880MNRAS..40..497B
HJ_1880B cited by Burnham (MNRAS 40, 497, 1880)
HJ_1897A Ma j Herschel, J.F.W. 1897MNRAS..57..541S
HJ_1897A cited by See (MNRAS 57, 541, 1897)
HJ_1905A Ma - Herschel, J.F.W. 1905LicOB...3..147A
HJ_1905A +Mb cited by Aitken (Lick Obs. Bull. 3, 147, 1905)
HJ_1906A Ma - Herschel, J.F.W. 1906MmRAS..56....1L
HJ_1906A +Mb cited by Lewis (MemRAS 56, 1, 1906)
HJ_1906B Ma - Herschel, J.F.W. 1906QB821.B972.....
HJ_1906B +Mb cited in BDS (Burnham Double Star Cat.), 1906
HJ_1927A Mb - Herschel, J.F.W. 1927sdsc.book......
HJ_1927A cited in SDS (Southern Double Star Catalog), 1927
HJ_1932A Mb - Herschel, J.F.W. 1932QB821.A43......
HJ_1932A cited in ADS (Aitken Double Star Cat.), 1932
HJ_9999 M j Herschel, J.F.W. ...................
HJ_9999 +Ma 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
20487-4359 DON 993 AB 2000 2 331 12.1 7.71 15.00 F3V D 204844.12-435858.4
20487-4359 DON 993 AB 2015 4 332 12.2 7.71 15.00 F3V 204844.12-435858.4
20487-4359 DON 993 AB 2016 7 332 12.2 7.71 15.00 F3V 204844.12-435858.4

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

 
 
WDS 20487-4359 DON 993 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20487-4359 DON 993 AB : MEASURES
 
 
No records found.

 
 
WDS 20487-4359 : VIRTUAL EYEPIECE
 
 

20487-4359 DON 993A mag 7.71 Sp F3V 20487-4359 DON 993B sep 11.5 P.A. 339.00 mag 15 20487-4359 HJ 5222C sep 20.6 P.A. 271.10 mag 12.57 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 20487-4359 : ALADIN DSS IMAGE @ 20h 48m 44.12s -43° 58' 58.4"
 
 
 
 
WDS 20487-4359 DON 993 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20487-4359 DON 993AB distance=0' 20485-4359 DON 992 distance=3' 20452-4428 BRT1114 distance=49' 20441-4412 KPP1048AB distance=52' 20427-4400 KPP3106 distance=65' 20555-4426 I 1430 distance=78' 20533-4519 SKF1169 distance=94' 20400-4359 DON 990AB distance=95' 20400-4359 DON 990AC distance=95' 20476-4534 I 1427 distance=96' 20578-4402 DON 995 distance=98' 20571-4439 LDS 729 distance=100' 20568-4452 HDS2984 distance=102' 20417-4253 TDT2475 distance=102' 20391-4345 LDS 717 distance=105' 20583-4345 I 1048 distance=105' 20385-4425 I 1424 distance=113' 20454-4554 RST1076 distance=122' 20389-4253 AOT 88 distance=126' 20409-4224 HJ 5211AB distance=128' 20409-4224 I 1121BC distance=129' 20372-4445 TOK 369 distance=132' 20561-4213 UC 4335 distance=133' 21008-4429 TDT2693 distance=134' 20381-4251 UC 4240 distance=134' 21011-4426 HJ 5238 distance=136' 20411-4549 SKF1166 distance=137' 20556-4204 BRT1116 distance=137' 20536-4153 BRT1115 distance=138' 20377-4520 UC 4239 distance=143' 21017-4431 TOK 800 distance=144' 20377-4236 UC 4238 distance=146' 21004-4519 HU 1533 distance=149' 20552-4139 UC 4327 distance=157' 21015-4246 NSN 455 distance=158' 21022-4300 DUN 236 distance=159' 20545-4627 B 508 distance=161' 20365-4533 I 41 distance=161' 20339-4431 I 127BC distance=162' 20356-4243 AOT 83 distance=162' 20465-4639 LDS 721 distance=163' 20339-4431 I 127AB distance=163' 20339-4431 DAM 325AD distance=163' 20339-4431 DAM 325AE distance=163' 20459-4640 RST2156 distance=164' 20355-4241 AOT 82 distance=165' 20531-4637 SKF1168 distance=165' 20548-4636 I 1429AB distance=170' 20370-4208 AOT 86 distance=170' 20495-4649 HU 1331 distance=170' 20348-4244 AOT 80 distance=171' 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 20487-4359 DON 993 AB 332 12.2
Show 20487-4359 HJ 5222 AC 271 28.6
Show 20485-4359 DON 992 291 5.2 3
Show 20452-4428 BRT1114 65 5.6 49
Show 20441-4412 KPP1048 AB 183 8.4 52
Show 20427-4400 KPP3106 232 2.5 65
Show 20555-4426 I 1430 29 1.4 78
Show 20533-4519 SKF1169 224 95.9 94
Show 20400-4359 DON 990 AB 39 0.3 95
Show 20400-4359 DON 990 AC 292 7.0 95
Show 20476-4534 I 1427 211 0.6 96
Show 20578-4402 DON 995 252 2.0 98
Show 20571-4439 LDS 729 106 220.3 100
Show 20568-4452 HDS2984 239 0.8 102
Show 20417-4253 TDT2475 303 1.0 102
Show 20391-4345 LDS 717 308 22.2 105
Show 20583-4345 I 1048 137 1.6 105
Show 20385-4425 I 1424 226 2.4 113
Show 20454-4554 RST1076 287 1.0 122
Show 20389-4253 AOT 88 55 15.8 126
Show 20409-4224 HJ 5211 AB 299 20.0 128
Show 20409-4224 I 1121 BC 243 9.3 129
Show 20372-4445 TOK 369 245 0.5 132
Show 20561-4213 UC 4335 196 30.8 133
Show 21008-4429 TDT2693 106 1.8 134
Show 20381-4251 UC 4240 351 45.0 134
Show 21011-4426 HJ 5238 192 36.9 136
Show 20411-4549 SKF1166 147 20.8 137
Show 20556-4204 BRT1116 138 4.5 137
Show 20536-4153 BRT1115 339 3.5 138
Show 20377-4520 UC 4239 226 11.9 143
Show 21017-4431 TOK 800 210 0.5 144
Show 20377-4236 UC 4238 182 83.6 146
Show 21004-4519 HU 1533 51 4.3 149
Show 20552-4139 UC 4327 96 77.2 157
Show 21015-4246 NSN 455 189 2.5 158
Show 21022-4300 DUN 236 73 57.4 159
Show 20545-4627 B 508 281 2.3 161
Show 20365-4533 I 41 356 2.3 161
Show 20339-4431 I 127 BC 209 0.6 162
Show 20356-4243 AOT 83 116 7.8 162
Show 20465-4639 LDS 721 215 6.7 163
Show 20339-4431 I 127 AB 50 62.3 163
Show 20339-4431 DAM 325 AD 91 49.9 163
Show 20339-4431 DAM 325 AE 101 70.0 163
Show 20459-4640 RST2156 245 0.6 164
Show 20355-4241 AOT 82 201 4.2 165
Show 20531-4637 SKF1168 231 16.9 165
Show 20548-4636 I 1429 AB 147 1.1 170
Show 20370-4208 AOT 86 303 9.1 170
Show 20495-4649 HU 1331 194 0.9 170

 
 
WDS 20487-4359 : COMPONENTS
 
 
  A B
B pa=339.0°
sep=11.52"
 
C pa=271.1°
sep=20.55"
pa=237.8°
sep=19.41"
 
 
20487-4359 A
 
 
Coord arcsec 2000 204844.12-435858.4 Mag 7.71 Spectral class F3V (yellow-white) PmRA 8.00
PmDE 22.0 SAO 230382 Tycho2 7975-01337-1 HD 197971
GC 28990 DM CD-4414148
Tycho2
Tycho2 7975-01337-1 Pflag RAmdeg 312.18386363 DEmdeg -43.98288935
PmRA 7.8 PmDE 21.8 E RAmdeg 6 E DEmdeg 6
E pmRA 1.1 E pmDE 1.1 EpRAm 1990.87 EpDEm 1990.89
Num 10 Q RAmdeg 1.5 Q DEmdeg 1.2 Q pmRA 1.5
Q pmDE 1.2 BTmag 8.153 E BTmag 0.017 VTmag 7.712
E VTmag 0.012 Prox 999 TYC T HIP
CCDM RAdeg 312.18383917 DEdeg -43.98294028 EpRA 1990 1.63
EpDE 1990 1.63 E RAdeg 5.5 E DEdeg 5.8 Posflg
Corr -0.2
SAO
SAO 230382 DelFlag RA1950 PmRA1950 0.0004
DE1950 PmDE1950 0.017 Vmag 7.7 SpType F5
Double code Source 70 CatNum 28990 DM CD-4414148
DMcomp BDsup HD 197971 M HD 0
GC 28990 RA1950rad 5.43393862 DE1950rad -0.77089214 PmRA2000 0.0004
PmDE2000 0.014
CCDM
Ccdm 20487-4359 RComp Comp A Note1
Note2 Discov num DRAs 2.11 DDEs 2.2
R dRAs 10 Year Theta Rho
Obs 3 Vmag 7.7 Sp F5 PmNote *
PmRA 6 PmDE 30 Dm number -4414148 Cat1 CD
Name2 230382 Cat2 SAO HD 197971 M HD
ADS BDS M ADS BDS N IDS IDS 20420S4421A
HIC
 
 
20487-4359 B
 
 
Coord arcsec 2000 204843.74-435847.6 Mag 15 Calc delta mag 7.29 Calc coord yes
CCDM
Ccdm 20487-4359 RComp Comp B Note1
Note2 Discov num DON 993 DRAs DDEs
R dRAs Year 1932 Theta 330 Rho 11.6
Obs 1 Vmag 15.0 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 20420S4421B
HIC
 
 
20487-4359 C
 
 
Coord arcsec 2000 204842.22-435858.0 Mag 12.57 PmRA 32.00 PmDE 59.0
Calc delta mag 4.86 Calc coord yes
CCDM
Ccdm 20487-4359 RComp Comp C Note1
Note2 Discov num HJ 5222 DRAs DDEs
R dRAs Year 1932 Theta 275 Rho 27.5
Obs 2 Vmag 12.5 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 20420S4421C
HIC