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Current system
20454+8105
LDS 1938


Nearby doubles
13' : 20472+8117
TDT2537

14' : 20465+8118
KPP4213

21' : 20400+8048
LDS1937

25' : 20415+8042
LOC 466

31' : 20565+8049
UC 4338

38' : 20295+8105
STT 593AB

38' : 20397+8030
HDS2946

45' : 20282+8125
BUP 211AB

50' : 20477+8016
SKF1250

56' : 20520+8158
TDT2588

59' : 20554+8011
LDS1943

61' : 20449+8206
LOC 467

65' : 20255+8152
LOC 452

67' : 20496+8000
TDT2564

67' : 20372+8001
LDS1936

69' : 20546+8210
LOC 468

79' : 20573+8219
LOC 470

83' : 20406+8227
TDT2464

96' : 20530+7932
TDT2601

107' : 20421+8251
LOC 469

111' : 20423+7915
SKF1247

112' : 20345+8254
MLR 235

114' : 21010+7919
MLR 244

118' : 20460+7907
MLR 237AB

119' : 20277+8257
MLR 234

126' : 20499+7900
LOC 464



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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20454+8105 LDS 1938

 
 
20h 45m 22.74s +81° 04' 49.1" P.A. 321.00 sep 18.2 mag 9.16,17.20 Sp G5V+DA6
 
 
Coord 2000 20454+8105 Discov num LDS1938 Comp Coord arcsec 2000 20 45 22.74 +81 04 49.1
Date first 1962 Date last 2015 Obs 4
Pa first 323 Pa last 321.2 P.A. Now (θ) 321.2°
Sep first 18.0 Sep last 18.244 Sep. Now (ρ) 18.244"
Mag pri 9.16 Mag sec 17.20 delta mag (ΔM) 8.04 Spectral class G5V+DA6 (yellow/white dwarf)
Pri motion ra +046 Sec motion ra +054
Pri motion dec +122 Sec motion dec +108
Notes V (Proper motion indicates physical)
rPM=0.124 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Draco Tycho2 4598-00133-1 Gaia DR2 2298135638861983104
 
 
WDS 20454+8105 LDS 1938 : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
LDS Luyten p.m. catalog (from additional DD list) ...................
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20454+8105 LDS1938 2000 2 321 18.7 9.16 14.40 G5 D 204522.74+810449.1
20454+8105 LDS1938 2004 3 322 18.4 9.16 14.40 G5 D 204522.74+810449.1
20454+8105 LDS1938 2015 4 321 18.2 9.16 17.20 G5V+DA6 V 204522.74+810449.1

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

 
 
WDS 20454+8105 LDS 1938 : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20454+8105 LDS 1938 : MEASURES
 
 
No records found.

 
 
WDS 20454+8105 : VIRTUAL EYEPIECE
 
 

20454+8105 LDS1938A mag 9.16 Sp G5V 20454+8105 LDS1938B sep 14.3 P.A. 352.90 mag 17.2 Sp DA6 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 20454+8105 : ALADIN DSS IMAGE @ 20h 45m 22.74s +81° 04' 49.1"
 
 
 
 
WDS 20454+8105 LDS 1938 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20454+8105 LDS1938 distance=0' 20472+8117 TDT2537 distance=13' 20465+8118 KPP4213 distance=14' 20400+8048 LDS1937 distance=21' 20415+8042 LOC 466 distance=25' 20565+8049 UC 4338 distance=31' 20295+8105 BUP 212BC distance=35' 20295+8105 STT 593AB distance=38' 20397+8030 HDS2946 distance=38' 20282+8125 BUP 211AB distance=45' 20282+8125 STH 7AC distance=45' 20477+8016 SKF1250 distance=50' 20520+8158 TDT2588 distance=56' 20554+8011 LDS1943 distance=59' 20449+8206 LOC 467 distance=61' 20255+8152 LOC 452 distance=65' 20496+8000 TDT2564 distance=67' 20372+8001 LDS1936 distance=67' 20546+8210 LOC 468 distance=69' 20573+8219 LOC 470 distance=79' 20406+8227 TDT2464 distance=83' 20530+7932 TDT2601 distance=96' 20421+8251 LOC 469 distance=107' 20423+7915 SKF1247 distance=111' 20345+8254 MLR 235 distance=112' 21010+7919 MLR 244 distance=114' 20460+7907 MLR 237AB distance=118' 20277+8257 MLR 234 distance=119' 20499+7900 LOC 464 distance=126' 21021+7855 LOC 477 distance=137' 20277+7828 KPP4200 distance=164' 21037+7827 KPP4222 distance=166' 20592+7823 CON 38 distance=166' 20319+8350 LOC 456 distance=168' 20491+7818 LOC 463 distance=168' 20291+7819 KPP1433 distance=172' 20323+7753 LOC 450 distance=196' 20487+8506 LOC 471AB distance=241' 20512+7656 SLW1227 distance=250' 20546+7653 LOC 460 distance=253' 20557+7648 UC 4331 distance=259' 20304+7634 TDT2327 distance=275' 20376+8551 LOC 458 distance=287' 20354+7619 OSW 17 distance=287' 20507+8552 STF2794 distance=288' 20562+7611 UC 4336 distance=296' 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 20454+8105 LDS1938 321 18.2
Show 20472+8117 TDT2537 209 1.0 13
Show 20465+8118 KPP4213 148 5.2 14
Show 20400+8048 LDS1937 312 6.7 21
Show 20415+8042 LOC 466 26 1.2 25
Show 20565+8049 UC 4338 91 12.9 31
Show 20295+8105 BUP 212 BC 293 100.4 35
Show 20295+8105 STT 593 AB 36 214.4 38
Show 20397+8030 HDS2946 143 0.2 38
Show 20282+8125 BUP 211 AB 11 109.5 45
Show 20282+8125 STH 7 AC 282 196.6 45
Show 20477+8016 SKF1250 333 4.3 50
Show 20520+8158 TDT2588 293 0.7 56
Show 20554+8011 LDS1943 314 15.8 59
Show 20449+8206 LOC 467 231 22.7 61
Show 20255+8152 LOC 452 150 1.1 65
Show 20496+8000 TDT2564 256 1.1 67
Show 20372+8001 LDS1936 313 40.8 67
Show 20546+8210 LOC 468 320 5.5 69
Show 20573+8219 LOC 470 263 3.1 79
Show 20406+8227 TDT2464 181 1.3 83
Show 20530+7932 TDT2601 350 2.5 96
Show 20421+8251 LOC 469 123 1.6 107
Show 20423+7915 SKF1247 338 17.3 111
Show 20345+8254 MLR 235 165 0.8 112
Show 21010+7919 MLR 244 188 2.5 114
Show 20460+7907 MLR 237 AB 118 3.1 118
Show 20277+8257 MLR 234 94 0.6 119
Show 20499+7900 LOC 464 336 2.1 126
Show 21021+7855 LOC 477 275 3.4 137
Show 20277+7828 KPP4200 166 1.7 164
Show 21037+7827 KPP4222 264 2.0 166
Show 20592+7823 CON 38 237 2.5 166
Show 20319+8350 LOC 456 266 1.1 168
Show 20491+7818 LOC 463 193 1.2 168
Show 20291+7819 KPP1433 234 10.8 172
Show 20323+7753 LOC 450 293 3.2 196
Show 20487+8506 LOC 471 AB 331 1.5 241
Show 20512+7656 SLW1227 136 10.1 250
Show 20546+7653 LOC 460 81 6.6 253
Show 20557+7648 UC 4331 35 15.6 259
Show 20304+7634 TDT2327 320 0.6 275
Show 20376+8551 LOC 458 163 3.6 287
Show 20354+7619 OSW 17 198 65.6 287
Show 20507+8552 STF2794 90 17.7 288
Show 20562+7611 UC 4336 300 22.3 296

 
 
WDS 20454+8105 : COMPONENTS
 
 
  A
B pa=352.9°
sep=14.33"
 
 
20454+8105 A
 
 
Componente originario normalizzato AB Coord arcsec 2000 204522.74+810449.1 Mag 9.16 Spectral class G5V (yellow)
PmRA 46.00 PmDE 122.0 Tycho2 4598-00133-1
Tycho2
Tycho2 4598-00133-1 Pflag RAmdeg 311.34479513 DEmdeg 81.08030863
PmRA 45.1 PmDE 122.5 E RAmdeg 11 E DEmdeg 11
E pmRA 1.3 E pmDE 1.4 EpRAm 1990.58 EpDEm 1990.76
Num 8 Q RAmdeg 0.9 Q DEmdeg 0.9 Q pmRA 0.9
Q pmDE 0.9 BTmag 9.895 E BTmag 0.025 VTmag 9.159
E VTmag 0.017 Prox 999 TYC T HIP
CCDM RAdeg 311.34413194 DEdeg 81.08003056 EpRA 1990 1.72
EpDE 1990 1.83 E RAdeg 11.4 E DEdeg 11.1 Posflg
Corr 0.0
CCDM
Ccdm 20454+8105 RComp Comp A Note1
Note2 Discov num DRAs 2.62 DDEs -11.3
R dRAs 12 Year Theta Rho
Obs 2 Vmag 10.4 Sp PmNote
PmRA 237 PmDE 103 Dm number +80 670 Cat1 BD
Name2 +80 438 Cat2 AGK2/3 HD M HD
ADS BDS M ADS BDS N IDS IDS 20506N8043A
HIC
 
 
20454+8105 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204521.98+810503.3 Mag 17.2 Spectral class DA6 (white dwarf)
PmRA 54.00 PmDE 108.0 Calc delta mag 8.04 Calc coord yes
CCDM
Ccdm 20454+8105 RComp Comp B Note1
Note2 Discov num LDS1938 DRAs DDEs
R dRAs Year 1962 Theta 323 Rho 18.0
Obs 1 Vmag 15.6 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 20506N8043B
HIC