20344-4221 DON 988 AB

 
 
20h 34m 23.71s -42° 20' 11.0" P.A. 118.00 sep 0.6 mag 10.79,11.14 Sp G5
 
 
Coord 2000 20344-4221 Discov num DON 988 Comp AB Coord arcsec 2000 20 34 23.71 -42 20 11.0
Date first 1932 Date last 1991 Obs 5
Pa first 118 Pa last 117.5 P.A. Now (θ) 117.5°
Sep first 0.6 Sep last 0.62 Sep. Now (ρ) 0.62"
Mag pri 10.79 Mag sec 11.14 delta mag (ΔM) 0.35 Spectral class G5 (yellow)
Pri motion ra +013 Sec motion ra
Pri motion dec +004 Sec motion dec
Notes
Nature of this double is uncertain.
 
 
20344-4221 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 20 34 24 -42 20 11 DON 988 AB 1991 5 118 0.6 10.79 11.14 0.35 <===
Show HD 195706 20 34 24 -42 20 11 DON 988 AB,C 2016 10 89 23.2 10.35 9.41 0.94
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Microscopium Tycho2 7958-01006-1 Gaia DR2 6679549017234812416
 
 
WDS 20344-4221 DON 988 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
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20344-4221 DON 988 AB 1991 5 118 0.6 10.79 11.14 G5 203423.70-422011.0

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WDS 20344-4221 DON 988 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20344-4221 DON 988 AB : MEASURES
 
 
No records found.

 
 
WDS 20344-4221 : VIRTUAL EYEPIECE
 
 

20344-4221 DON 988A mag 10.79 Sp G5 20344-4221 DON 988B sep 0.5 P.A. 125.20 mag 11.14 20344-4221 DON 988C sep 17.2 P.A. 88.90 mag 9.41 virtual eyepiece
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Radius:
Components only
 
 
WDS 20344-4221 : ALADIN DSS IMAGE @ 20h 34m 23.71s -42° 20' 11.0"
 
 
 
 
WDS 20344-4221 DON 988 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


20344-4221  DON 988AB distance=0' 20345-4216  NSN 481 distance=5' 20351-4226  AOT  81 distance=10' 20348-4244  AOT  80 distance=24' 20355-4241  AOT  82 distance=24' 20356-4243  AOT  83 distance=27' 20370-4208  AOT  86 distance=32' 20360-4147  AOT  84 distance=38' 20374-4202  CPO  89 distance=38' 20377-4236  UC 4238 distance=41' 20381-4251  UC 4240 distance=52' 20389-4253  AOT  88 distance=60' 20331-4116  BRT1111 distance=66' 20409-4224  I  1121BC distance=73' 20409-4224  HJ 5211AB distance=73' 20392-4131  KPP1483 distance=73' 20280-4237  RSS  36 distance=73' 20337-4104  B   490 distance=77' 20417-4253  TDT2475 distance=87' 20319-4054  GLI 259AB distance=91' 20319-4054  I  1627AC distance=91' 20400-4109  UC 4250 distance=95' 20391-4345  LDS 717 distance=100' 20276-4110  UC 4190 distance=104' 20338-4033  JC   18AB distance=107' 20338-4033  JC   18AC distance=107' 20267-4334  I  1420 distance=112' 20240-4231  DON 984 distance=116' 20400-4359  DON 990AB distance=117' 20400-4359  DON 990AC distance=117' 20239-4225  BU  763AB distance=117' 20239-4225  I  1626AC distance=117' 20239-4225  SEE 511AD distance=117' 20289-4402  HJ 5201 distance=120' 20353-4017  SEE 421AB distance=124' 20353-4017  KPP4396AC distance=124' 20276-4038  RSS 547 distance=128' 20339-4431  I   127BC distance=131' 20339-4431  I   127AB distance=131' 20339-4431  DAM 325AD distance=131' 20339-4431  DAM 325AE distance=131' 20385-4425  I  1424 distance=134' 20235-4319  TDT2231 distance=134' 20225-4203  HJ 5190AB distance=134' 20225-4203  HJ 5190AC distance=134' 20427-4400  KPP3106 distance=135' 20348-3957  WG  258 distance=142' 20372-4445  TOK 369 distance=148' 20404-4012  WG  260 distance=148' 20296-4000  UC 4200 distance=151' 20258-4420  BRT1108 distance=152' grafico limitrofi
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Show name coord_2000 discov# comp pa sep dist(')
Show 20344-4221 DON 988 AB 118 0.6
Show 20344-4221 DON 988 AB,C 89 23.2
Show 20345-4216 NSN 481 91 1.7 5
Show 20351-4226 AOT 81 185 14.1 10
Show 20348-4244 AOT 80 246 11.1 24
Show 20355-4241 AOT 82 201 4.2 24
Show 20356-4243 AOT 83 116 7.8 27
Show 20370-4208 AOT 86 303 9.1 32
Show 20360-4147 AOT 84 137 18.9 38
Show 20374-4202 CPO 89 284 16.0 38
Show 20377-4236 UC 4238 182 83.6 41
Show 20381-4251 UC 4240 351 45.0 52
Show 20389-4253 AOT 88 55 15.8 60
Show 20331-4116 BRT1111 162 4.3 66
Show 20409-4224 I 1121 BC 243 9.3 73
Show 20409-4224 HJ 5211 AB 299 20.0 73
Show 20392-4131 KPP1483 59 11.1 73
Show 20280-4237 RSS 36 267 35.7 73
Show 20337-4104 B 490 64 1.2 77
Show 20417-4253 TDT2475 303 1.0 87
Show 20319-4054 GLI 259 AB 159 4.1 91
Show 20319-4054 I 1627 AC 346 17.6 91
Show 20400-4109 UC 4250 315 28.8 95
Show 20391-4345 LDS 717 308 22.2 100
Show 20276-4110 UC 4190 62 27.4 104
Show 20338-4033 JC 18 AB 224 4.4 107
Show 20338-4033 JC 18 AC 145 108.0 107
Show 20267-4334 I 1420 358 0.3 112
Show 20240-4231 DON 984 258 0.9 116
Show 20400-4359 DON 990 AB 39 0.3 117
Show 20400-4359 DON 990 AC 292 7.0 117
Show 20239-4225 BU 763 AB 180 0.5 117
Show 20239-4225 I 1626 AC 268 18.6 117
Show 20239-4225 SEE 511 AD 219 29.8 117
Show 20289-4402 HJ 5201 117 10.7 120
Show 20353-4017 SEE 421 AB 7 14.7 124
Show 20353-4017 KPP4396 AC 51 4.2 124
Show 20276-4038 RSS 547 12 10.0 128
Show 20339-4431 I 127 BC 209 0.6 131
Show 20339-4431 I 127 AB 50 62.3 131
Show 20339-4431 DAM 325 AD 91 49.9 131
Show 20339-4431 DAM 325 AE 101 70.0 131
Show 20385-4425 I 1424 226 2.4 134
Show 20235-4319 TDT2231 227 0.8 134
Show 20225-4203 HJ 5190 AB 312 40.0 134
Show 20225-4203 HJ 5190 AC 283 56.8 134
Show 20427-4400 KPP3106 232 2.5 135
Show 20348-3957 WG 258 239 8.5 142
Show 20372-4445 TOK 369 245 0.5 148
Show 20404-4012 WG 260 31 6.2 148
Show 20296-4000 UC 4200 302 40.7 151

 
 
WDS 20344-4221 : COMPONENTS
 
 
  A B
B pa=125.2°
sep=0.50"
 
C pa=88.9°
sep=17.19"
pa=87.9°
sep=16.79"
 
 
20344-4221 A
 
 
Coord arcsec 2000 203423.71-422011.0 Mag 10.79 Spectral class G5 (yellow) PmRA 13.00
PmDE 4.0 Tycho2 7958-01006-1
Tycho2
Tycho2 7958-01006-1 Pflag RAmdeg 308.59877634 DEmdeg -42.33641368
PmRA 17.1 PmDE -2.2 E RAmdeg 24 E DEmdeg 27
E pmRA 1.4 E pmDE 1.4 EpRAm 1981.48 EpDEm 1978.89
Num 4 Q RAmdeg 1.6 Q DEmdeg 1.9 Q pmRA 1.6
Q pmDE 1.9 BTmag 10.920 E BTmag 0.054 VTmag 10.348
E VTmag 0.047 Prox 231 TYC T HIP
CCDM RAdeg 308.59871750 DEdeg -42.33640278 EpRA 1990 1.67
EpDE 1990 1.64 E RAdeg 29.3 E DEdeg 33.6 Posflg P
Corr -0.2
 
 
20344-4221 B
 
 
Coord arcsec 2000 203423.75-422011.3 Mag 11.14 Calc delta mag 0.35 Calc coord yes
 
 
20344-4221 C
 
 
Coord arcsec 2000 203425.26-422010.7 Mag 9.41 PmRA 24.00 PmDE 3.0
Tycho2 7958-00085-1 HD 195706 Calc delta mag 1.38 Calc coord yes
Tycho2
Tycho2 7958-00085-1 Pflag RAmdeg 308.60746823 DEmdeg -42.33629623
PmRA 17.2 PmDE -1.0 E RAmdeg 15 E DEmdeg 17
E pmRA 1.3 E pmDE 1.3 EpRAm 1987.63 EpDEm 1986.12
Num 5 Q RAmdeg 0.4 Q DEmdeg 2.1 Q pmRA 0.4
Q pmDE 2.0 BTmag 10.559 E BTmag 0.041 VTmag 9.409
E VTmag 0.023 Prox 231 TYC T HIP
CCDM RAdeg 308.60741361 DEdeg -42.33629278 EpRA 1990 1.67
EpDE 1990 1.60 E RAdeg 16.3 E DEdeg 19.0 Posflg
Corr -0.2