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Current system
17557+1830
HDS 2528


Nearby doubles
25' : 17568+1811
LDS1003

26' : 17569+1811
J 1352

28' : 17567+1806
J 459

40' : 17569+1906
RAO 381

41' : 17584+1812
J 3268

49' : 17533+1904
KU 56AB

57' : 17568+1736
BPM 710

62' : 17579+1923
KPP 406

66' : 17595+1753
BPM 715

69' : 17510+1821
HDS2517

75' : 17524+1733
BPM 703

83' : 17527+1940
BRT2439

83' : 18014+1811
GWP2756

88' : 17577+1707
AG 357

89' : 18005+1734
COU 809

90' : 18007+1736
COU 810

93' : 17513+1723
TDT 536

93' : 17537+1702
BPM 706

94' : 17503+1737
BPM 702

95' : 18019+1754
LEP 156

96' : 17524+1708
TDT 550

100' : 18008+1721
GWP2752

101' : 18024+1758
BPM 717

103' : 17530+1655
CRC 27AB

108' : 17547+2016
OSO 88

113' : 17595+2009
UC 3465



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

17557+1830 HDS 2528

 
 
17h 55m 44.90s +18° 30' 01.4" P.A. 253.00 sep 18.5 mag 9.36,12.30 Sp K5 dist. 25.04 pc (81.68 l.y.)
 
 
Coord 2000 17557+1830 Discov num HDS2528 Comp Coord arcsec 2000 17 55 44.90 +18 30 01.4
Date first 1900 Date last 2016 Obs 14
Pa first 254 Pa last 252.9 P.A. Now (θ) 252.9°
Sep first 19.2 Sep last 18.498 Sep. Now (ρ) 18.498"
Mag pri 9.36 Mag sec 12.30 delta mag (ΔM) 2.94 Spectral class K5 (yellow-orange)
Pri motion ra -047 Sec motion ra -047
Pri motion dec -047 Sec motion dec -046
Notes
rPM=0.015 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Hercules HIP 87768 Tycho2 1557-01987-1 Gaia DR2 4503423641091793152
GL Gl 698 BD BD+18 3497 Distance 25.04 Distance ly 81.68
 
 
WDS 17557+1830 HDS 2528 : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
HDS Hipparcos Double Star (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
17557+1830 HDS2528 2001 4 252 18.6 9.36 12.30 K5 D 175544.90+183001.4
17557+1830 HDS2528 2014 6 253 18.4 9.36 12.30 K5 175544.90+183001.4
17557+1830 HDS2528 2015 8 253 18.5 9.36 12.30 K5 175544.90+183001.4
17557+1830 HDS2528 2016 14 253 18.5 9.36 12.30 K5 175544.90+183001.4

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

 
 
WDS 17557+1830 HDS 2528 : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 17557+1830 HDS 2528 : MEASURES
 
 
No records found.

 
 
WDS 17557+1830 : VIRTUAL EYEPIECE
 
 

17557+1830 HDS2528A mag 9.36 Sp K5 17557+1830 HDS2528B sep 17.6 P.A. 252.00 mag 12.3 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 17557+1830 : ALADIN DSS IMAGE @ 17h 55m 44.90s +18° 30' 01.4"
 
 
 
 
WDS 17557+1830 HDS 2528 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

17557+1830 HDS2528 distance=0' 17564+1820 STF2245BA distance=14' 17564+1820 MCA 49Aa,Ab distance=15' 17568+1811 LDS1003 distance=25' 17569+1811 J 1352 distance=26' 17567+1806 J 459 distance=28' 17569+1906 RAO 381 distance=40' 17584+1812 J 3268 distance=41' 17533+1904 KU 56AB distance=49' 17533+1904 KU 56AC distance=49' 17568+1736 BPM 710 distance=57' 17579+1923 KPP 406 distance=62' 17595+1753 BPM 715 distance=66' 17510+1821 HDS2517 distance=69' 17524+1733 BPM 703 distance=75' 17527+1940 BRT2439 distance=83' 18014+1811 GWP2756 distance=83' 17577+1707 AG 357 distance=88' 18005+1734 COU 809 distance=89' 18007+1736 COU 810 distance=90' 17513+1723 TDT 536 distance=93' 17537+1702 BPM 706 distance=93' 17503+1737 BPM 702 distance=94' 18019+1754 LEP 156 distance=95' 17524+1708 TDT 550 distance=96' 18008+1721 GWP2752 distance=100' 18024+1758 BPM 717 distance=101' 17530+1655 CRC 27Aa,Ab distance=103' 17530+1655 CRC 27AB distance=103' 17547+2016 OSO 88 distance=108' 17595+2009 UC 3465 distance=113' 17476+1831 UC 3409 distance=117' 18016+1953 RAO 383 distance=118' 17547+1633 UC 234 distance=118' 17483+1740 BPM 700 distance=119' 17487+1728 DAM 280 distance=119' 17544+2030 BRT2837 distance=122' 17484+1727 ARG 79 distance=123' 17596+1638 UC 3466 distance=125' 17590+1631 DAM 98 distance=128' 17589+1629 DAM 97AB distance=129' 17589+1629 DAM 97AC distance=129' 17589+1629 DAM 97AD distance=129' 17471+1742 STF2215 distance=132' 17571+2047 RAO 382 distance=139' 18051+1912 KPP1682 distance=139' 18031+1654 BPM 718 distance=143' 17538+1610 BPM 707 distance=144' 17471+1945 UC 3405AB distance=144' 17471+1945 UC 3405AC distance=144' 18052+1739 KPP4082 distance=145' 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 17557+1830 HDS2528 253 18.5
Show 17564+1820 STF2245 BA 112 2.7 14
Show 17564+1820 MCA 49 Aa,Ab 286 0.1 15
Show 17568+1811 LDS1003 111 161.5 25
Show 17569+1811 J 1352 23 3.9 26
Show 17567+1806 J 459 55 3.4 28
Show 17569+1906 RAO 381 45 0.2 40
Show 17584+1812 J 3268 216 4.0 41
Show 17533+1904 KU 56 AB 127 2.8 49
Show 17533+1904 KU 56 AC 3 25.2 49
Show 17568+1736 BPM 710 52 47.5 57
Show 17579+1923 KPP 406 52 3.8 62
Show 17595+1753 BPM 715 26 115.9 66
Show 17510+1821 HDS2517 211 0.5 69
Show 17524+1733 BPM 703 353 82.3 75
Show 17527+1940 BRT2439 181 4.7 83
Show 18014+1811 GWP2756 318 261.9 83
Show 17577+1707 AG 357 190 2.9 88
Show 18005+1734 COU 809 26 2.1 89
Show 18007+1736 COU 810 99 0.2 90
Show 17513+1723 TDT 536 61 1.1 93
Show 17537+1702 BPM 706 287 69.6 93
Show 17503+1737 BPM 702 294 118.8 94
Show 18019+1754 LEP 156 92 5.0 95
Show 17524+1708 TDT 550 32 0.5 96
Show 18008+1721 GWP2752 83 479.5 100
Show 18024+1758 BPM 717 250 115.6 101
Show 17530+1655 CRC 27 Aa,Ab 112 0.9 103
Show 17530+1655 CRC 27 AB 31 9.0 103
Show 17547+2016 OSO 88 34 27.9 108
Show 17595+2009 UC 3465 90 51.0 113
Show 17476+1831 UC 3409 235 19.2 117
Show 18016+1953 RAO 383 223 0.6 118
Show 17547+1633 UC 234 204 32.4 118
Show 17483+1740 BPM 700 143 67.0 119
Show 17487+1728 DAM 280 177 5.6 119
Show 17544+2030 BRT2837 281 2.8 122
Show 17484+1727 ARG 79 119 30.1 123
Show 17596+1638 UC 3466 182 42.0 125
Show 17590+1631 DAM 98 249 7.7 128
Show 17589+1629 DAM 97 AB 103 10.8 129
Show 17589+1629 DAM 97 AC 223 8.1 129
Show 17589+1629 DAM 97 AD 140 4.5 129
Show 17471+1742 STF2215 249 0.4 132
Show 17571+2047 RAO 382 196 1.0 139
Show 18051+1912 KPP1682 17 13.0 139
Show 18031+1654 BPM 718 52 42.0 143
Show 17538+1610 BPM 707 132 98.6 144
Show 17471+1945 UC 3405 AB 259 27.2 144
Show 17471+1945 UC 3405 AC 226 1.2 144
Show 18052+1739 KPP4082 45 31.7 145

 
 
WDS 17557+1830 : COMPONENTS
 
 
  A
B pa=252.0°
sep=17.63"
 
 
17557+1830 A
 
 
Componente originario normalizzato AB Coord arcsec 2000 175544.90+183001.4 Mag 9.36 Spectral class K5 (yellow-orange)
PmRA -47.00 PmDE -47.0 HIP 87768 Tycho2 1557-01987-1
BD BD+18 3497
Tycho2
Tycho2 1557-01987-1 Pflag RAmdeg 268.93706156 DEmdeg 18.50038072
PmRA -49.2 PmDE -47.2 E RAmdeg 13 E DEmdeg 13
E pmRA 1.2 E pmDE 1.2 EpRAm 1990.14 EpDEm 1990.19
Num 8 Q RAmdeg 2.0 Q DEmdeg 1.0 Q pmRA 2.1
Q pmDE 1.1 BTmag 10.651 E BTmag 0.033 VTmag 9.363
E VTmag 0.017 Prox 188 TYC T HIP 87768
CCDM A RAdeg 268.93718472 DEdeg 18.50049000 EpRA 1990 1.68
EpDE 1990 1.68 E RAdeg 12.5 E DEdeg 13.4 Posflg
Corr -0.2
Hipparcos
Catalog H HIP 87768 Proxy RAhms 17 55 44.93
DEdms +18 30 01.8 Vmag 9.22 VarFlag 2 R Vmag G
RAdeg 268.937 DEdeg 18.5005 AstroRef A Plx 43.4
CCDM 17557+1830 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source Qual D M HIP AB
Theta 47 Rho 18.788 HD BD BD+18 3497
CD CP Dm number +18 3497 VIred 1.14
SpType K5 R SpType Coord arcsec 2000 175544.93+183001.8
Hipparcos 2
HIP 87768 Sn 15 So 3 Nc 2
RArad 4.6938395371 DErad 0.3228946418 Plx 39.93 PmRA -45.79
PmDE -44.5 E RArad 1.36 E DErad 1.4 E Plx 2.11
E pmRA 1.61 E pmDE 1.53 Hpmag 9.299 E Hpmag 0.0243
SHp 0.036 VA 0 BV 1.18 E BV 0.015
VI 1.14
CCDM
Ccdm 17557+1830 RComp Comp A Note1
Note2 Discov num DRAs 2.89 DDEs 1.4
R dRAs 82 Year Theta Rho
Obs 2 Vmag 9.3 Sp K5 PmNote *
PmRA -46 PmDE -48 Dm number +18 3497 Cat1 BD
Name2 +18 1625 Cat2 AGK2/3 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 87768
 
 
17557+1830 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 175543.72+182956.0 Mag 12.3 PmRA -47.00
PmDE -46.0 Calc delta mag 2.94 Calc coord yes
CCDM
Ccdm 17557+1830 RComp Comp B Note1
Note2 Discov num HDS DRAs 3.86 DDEs 14.3
R dRAs 82 Year 1991 Theta 47 Rho 18.8
Obs 1 Vmag 12.3 Sp PmNote *
PmRA -46 PmDE -48 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 87768