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Doubles in session


Current system
18367-1357
LEO 20 AB
HD 171688


Nearby doubles
13' : 18362-1407
SNA 92

17' : 18355-1356
SLE 204

21' : 18381-1400
BU 135AB

39' : 18387-1332
BRT2756

45' : 18387-1430
CRC 30AB

45' : 18387-1429
HDS2641AB

45' : 18339-1339
SLE 192

46' : 18341-1421
RST4017

53' : 18349-1442
STF2337AB

53' : 18337-1426
SLE 190

56' : 18332-1418
SLE 185AB

59' : 18348-1449
J 2218

60' : 18359-1300
LDS6171

67' : 18321-1400
HO 435AB

70' : 18402-1310
TDT 987

70' : 18358-1246
J 2135AB

70' : 18409-1430
BU 967AB

70' : 18357-1246
J 2133AB

70' : 18408-1320
HDS2646

76' : 18323-1439
CHR 73

78' : 18328-1304
J 1745

80' : 18396-1250
J 524

84' : 18315-1430
BRT 593

88' : 18309-1418
BRT 592

89' : 18385-1234
J 1595

89' : 18419-1445
J 2222



Selections
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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.

18367-1357 LEO 20 AB (HD 171688)

 
 
18h 36m 42.25s -13° 56' 51.2" P.A. 255.00 sep 4.1 mag 10.36,11.10 Sp F0IIIm:
 
 
Coord 2000 18367-1357 Discov num LEO  20 Comp AB Coord arcsec 2000 18 36 42.25 -13 56 51.2
Date first 1917 Date last 2018 Obs 7
Pa first 258 Pa last 254.7 P.A. Now (θ) 254.7°
Sep first 4.0 Sep last 4.093 Sep. Now (ρ) 4.093"
Mag pri 10.36 Mag sec 11.10 delta mag (ΔM) 0.74 Spectral class F0IIIm: (yellow-white)
Pri motion ra +043 Sec motion ra
Pri motion dec +001 Sec motion dec
Notes
Nature of this double is uncertain.
 
 
18367-1357 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 171688 18 36 42 -13 56 51 LEO 20 AB 2018 7 255 4.1 10.36 11.10 0.74 <===
Show 18 36 42 -13 56 51 LEO 20 AC 2018 11 120 24.4 10.36 11.25 0.89
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 171688 Constellation Scutum Tycho2 5703-03832-1 Gaia DR2 4103762881163968896
HD 171688
 
 
WDS 18367-1357 LEO 20 AB (HD 171688) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Leo1918 Ma - Leonard, F.C. 1918MNRAS..78..475L
Leo1918 MNRAS 78, 475, 1918
Leo1933 Ma - Leonard, F.C. 1933LicOB..16...90L
Leo1933 Lick Obs. Bull. 16, 90, 1933
Leo1943 Ma - Leonard, F.C. 1943PASP...55..241L
Leo1943 PASP 55, 241, 1943
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18367-1357 LEO 20 AB 1998 4 256 3.7 10.36 11.10 F0IIIm: D 183642.25-135651.2
18367-1357 LEO 20 AB 2009 5 255 4.1 10.36 11.10 F0IIIm: D 183642.25-135651.2
18367-1357 LEO 20 AB 2010 7 254 3.5 10.36 11.10 F0IIIm: 183642.25-135651.2
18367-1357 LEO 20 AB 2018 7 255 4.1 10.36 11.10 F0IIIm: 183642.25-135651.2

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

 
 
WDS 18367-1357 LEO 20 AB (HD 171688) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18367-1357 LEO 20 AB (HD 171688) : MEASURES
 
 
No records found.

 
 
WDS 18367-1357 (HD 171688) : VIRTUAL EYEPIECE
 
 

18367-1357 LEO 20A mag 10.36 Sp F0IIIm: 18367-1357 LEO 20B sep 4.0 P.A. 254.30 mag 11.1 18367-1357 LEO 20C sep 23.9 P.A. 121.10 mag 11.25 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 18367-1357 (HD 171688) : ALADIN DSS IMAGE @ 18h 36m 42.25s -13° 56' 51.2"
 
 
 
 
WDS 18367-1357 LEO 20 AB (HD 171688) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18367-1357 LEO 20AB distance=0' 18362-1407 SNA 92 distance=13' 18355-1356 SLE 204 distance=17' 18381-1400 BU 135AB distance=21' 18381-1400 BU 135AC distance=21' 18381-1400 SLE 218AD distance=21' 18381-1400 SLE 218AE distance=21' 18381-1400 B 2911AF distance=21' 18381-1400 B 2911AG distance=21' 18387-1332 BRT2756 distance=39' 18387-1430 CRC 30AB distance=45' 18387-1430 CRC 30AC distance=45' 18387-1430 CRC 30AD distance=45' 18387-1429 HDS2641AB distance=45' 18339-1339 SLE 192 distance=45' 18341-1421 RST4017 distance=46' 18349-1442 STF2337AB distance=53' 18349-1442 ARN 47AC distance=53' 18337-1426 SLE 190 distance=53' 18332-1418 SLE 185AB distance=56' 18332-1418 SLE 185AC distance=56' 18348-1449 J 2218 distance=59' 18359-1300 LDS6171 distance=60' 18321-1400 HO 435AB distance=67' 18321-1400 HO 435AC distance=67' 18321-1400 HO 435AD distance=67' 18321-1400 HO 435AE distance=67' 18402-1310 TDT 987 distance=70' 18358-1246 J 2135AB distance=70' 18358-1246 J 2135BC distance=70' 18409-1430 BU 967AB distance=70' 18409-1430 BU 967AC distance=70' 18409-1430 DAM 13AD distance=70' 18357-1246 J 2133AB distance=70' 18357-1246 J 2133AD distance=70' 18357-1246 J 2133BC distance=70' 18408-1320 HDS2646 distance=70' 18323-1439 CHR 73 distance=76' 18328-1304 J 1745 distance=78' 18396-1250 J 524 distance=80' 18315-1430 BRT 593 distance=84' 18309-1418 BRT 592 distance=88' 18385-1234 J 1595 distance=89' 18419-1445 J 2222 distance=89' 18420-1445 J 2223 distance=91' 18424-1435 HU 249 distance=91' 18313-1306 EVS 8 distance=94' 18369-1532 J 2220 distance=94' 18390-1528 J 1834 distance=96' 18315-1456 J 2132 distance=97' 18308-1309 BRT2754 distance=99' 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 18367-1357 LEO 20 AB 255 4.1
Show 18367-1357 LEO 20 AC 120 24.4
Show 18362-1407 SNA 92 72 0.0 13
Show 18355-1356 SLE 204 234 25.0 17
Show 18381-1400 BU 135 AB 189 2.5 21
Show 18381-1400 BU 135 AC 78 15.0 21
Show 18381-1400 SLE 218 AD 338 120.7 21
Show 18381-1400 SLE 218 AE 108 118.7 21
Show 18381-1400 B 2911 AF 56 36.3 21
Show 18381-1400 B 2911 AG 74 39.8 21
Show 18387-1332 BRT2756 336 4.5 39
Show 18387-1430 CRC 30 AB 261 4.8 45
Show 18387-1430 CRC 30 AC 300 9.6 45
Show 18387-1430 CRC 30 AD 61 7.3 45
Show 18387-1429 HDS2641 AB 358 0.1 45
Show 18339-1339 SLE 192 194 8.5 45
Show 18341-1421 RST4017 211 0.2 46
Show 18349-1442 STF2337 AB 296 16.6 53
Show 18349-1442 ARN 47 AC 80 377.8 53
Show 18337-1426 SLE 190 34 14.1 53
Show 18332-1418 SLE 185 AB 253 11.5 56
Show 18332-1418 SLE 185 AC 288 44.5 56
Show 18348-1449 J 2218 169 6.6 59
Show 18359-1300 LDS6171 270 5.0 60
Show 18321-1400 HO 435 AB 228 1.7 67
Show 18321-1400 HO 435 AC 269 23.9 67
Show 18321-1400 HO 435 AD 80 16.7 67
Show 18321-1400 HO 435 AE 1 21.3 67
Show 18402-1310 TDT 987 153 2.5 70
Show 18358-1246 J 2135 AB 19 4.9 70
Show 18358-1246 J 2135 BC 21 4.9 70
Show 18409-1430 BU 967 AB 195 2.4 70
Show 18409-1430 BU 967 AC 53 39.0 70
Show 18409-1430 DAM 13 AD 66 55.5 70
Show 18357-1246 J 2133 AB 15 7.4 70
Show 18357-1246 J 2133 AD 77 13.0 70
Show 18357-1246 J 2133 BC 321 5.6 70
Show 18408-1320 HDS2646 166 0.1 70
Show 18323-1439 CHR 73 254 0.0 76
Show 18328-1304 J 1745 53 8.8 78
Show 18396-1250 J 524 312 3.6 80
Show 18315-1430 BRT 593 355 5.6 84
Show 18309-1418 BRT 592 321 6.4 88
Show 18385-1234 J 1595 64 11.3 89
Show 18419-1445 J 2222 162 4.8 89
Show 18420-1445 J 2223 29 4.7 91
Show 18424-1435 HU 249 225 3.2 91
Show 18313-1306 EVS 8 96 12.8 94
Show 18369-1532 J 2220 15 6.0 94
Show 18390-1528 J 1834 59 7.5 96
Show 18315-1456 J 2132 322 3.7 97

 
 
WDS 18367-1357 : COMPONENTS
 
 
  A B
B pa=254.3°
sep=3.98"
 
C pa=121.1°
sep=23.88"
pa=114.8°
sep=26.76"
 
 
18367-1357 A
 
 
Name HD 171688 Coord arcsec 2000 183642.25-135651.2 Mag 10.36 Spectral class F0IIIm: (yellow-white)
PmRA 43.00 PmDE 1.0 Tycho2 5703-03832-1 HD 171688
Tycho2
Tycho2 5703-03832-1 Pflag RAmdeg 279.17609394 DEmdeg -13.94755782
PmRA 5.2 PmDE -9.2 E RAmdeg 39 E DEmdeg 41
E pmRA 1.9 E pmDE 1.9 EpRAm 1986.26 EpDEm 1985.79
Num 3 Q RAmdeg 1.2 Q DEmdeg 0.2 Q pmRA 1.2
Q pmDE 0.3 BTmag 10.769 E BTmag 0.060 VTmag 10.359
E VTmag 0.063 Prox 244 TYC T HIP
CCDM RAdeg 279.17608111 DEdeg -13.94753639 EpRA 1990 1.61
EpDE 1990 1.65 E RAdeg 39.7 E DEdeg 41.9 Posflg
Corr 0.0
CCDM
Ccdm 18367-1357 RComp Comp A Note1
Note2 Discov num DRAs 0.20 DDEs 8.7
R dRAs 66 Year Theta Rho
Obs 3 Vmag 10.2 Sp F0 PmNote
PmRA PmDE Dm number -14 5134 Cat1 BD
Name2 Cat2 HD 171688 M HD
ADS BDS A11490 M ADS BDS N IDS IDS 18310S1402A
HIC
 
 
18367-1357 B
 
 
Coord arcsec 2000 183641.99-135652.3 Mag 11.1 Calc delta mag 0.74 Calc coord yes
CCDM
Ccdm 18367-1357 RComp Comp B Note1
Note2 Discov num LEO 20 DRAs DDEs
R dRAs Year 1917 Theta 258 Rho 4.0
Obs 1 Vmag 10.9 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11490 M ADS BDS N IDS IDS 18310S1402B
HIC
 
 
18367-1357 C
 
 
Coord arcsec 2000 183643.66-135703.5 Mag 11.25 PmRA 0.00 PmDE -8.0
Tycho2 5703-03662-1 Calc delta mag 0.89 Calc coord yes
Tycho2
Tycho2 5703-03662-1 Pflag RAmdeg 279.18209722 DEmdeg -13.95100227
PmRA -1.5 PmDE -9.2 E RAmdeg 67 E DEmdeg 57
E pmRA 1.8 E pmDE 1.8 EpRAm 1968.34 EpDEm 1970.84
Num 5 Q RAmdeg 0.6 Q DEmdeg 0.4 Q pmRA 0.7
Q pmDE 0.4 BTmag 11.630 E BTmag 0.120 VTmag 11.254
E VTmag 0.146 Prox 244 TYC HIP
CCDM RAdeg 279.18209083 DEdeg -13.95097167 EpRA 1990 1.59
EpDE 1990 1.67 E RAdeg 86.1 E DEdeg 88.4 Posflg
Corr 0.0
CCDM
Ccdm 18367-1357 RComp Comp C Note1
Note2 Discov num LEO 20 DRAs 1.74 DDEs -3.3
R dRAs 66 Year 1917 Theta 105 Rho 30.0
Obs 1 Vmag 10.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11490 M ADS BDS N IDS IDS 18310S1402C
HIC