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Current system
17530-0755
STF 3128 AB
HD 162756


Nearby doubles
5' : 17527-0757
STF2234

32' : 17550-0744
LLO 14

57' : 17531-0852
HDS2523

67' : 17525-0649
WFC 200

72' : 17564-0845
RST3988

90' : 17489-0650
LDS 613

97' : 17475-0847
OSO 84AB

102' : 17596-0820
GWP2751

107' : 17526-0609
EVS 32AB

114' : 17593-0651
STF2250AB

114' : 17476-0634
RST4576

118' : 17505-0603
LAF 59AB

120' : 17533-0556
HO 561

121' : 18007-0717
LDS 621

124' : 17589-0924
OSO 90AB

124' : 17457-0713
RST4574

129' : 17587-0620
GWP2750

131' : 17472-0617
RST4575

145' : 18004-0929
RST3990

146' : 18025-0719
RST3992

151' : 18031-0811
STF2262AB

155' : 17443-0632
RST4573AB

157' : 17526-0519
HO 422

159' : 18008-0552
RST5546AB

167' : 18013-0601
J 2511

174' : 18053-0823
J 1645



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.

17530-0755 STF 3128 AB (HD 162756)

 
 
17h 52m 58.64s -07° 55' 10.2" P.A. 50.00 sep 1.3 mag 7.82,9.95 Sp G0IV-V dist. 58.45 pc (190.66 l.y.)
 
 
Coord 2000 17530-0755 Discov num STF3128 Comp AB Coord arcsec 2000 17 52 58.64 -07 55 10.2
Date first 1834 Date last 2016 Obs 30
Pa first 27 Pa last 49.8 P.A. Now (θ) 49.8°
Sep first 1.5 Sep last 1.268 Sep. Now (ρ) 1.268"
Mag pri 7.82 Mag sec 9.95 delta mag (ΔM) 2.13 Spectral class G0IV-V (yellow)
Pri motion ra -063 Sec motion ra -066
Pri motion dec -255 Sec motion dec -255
Notes N O (See Notes, Orbital solution)
rPM=0.011 (< 0.3, Physical double)
This double is physical.
 
 
17530-0755 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 162756 141935 17 52 59 -07 55 10 STF 3128 AB 2016 30 50 1.3 7.82 9.95 2.13 Y <===
Show 141935 17 52 59 -07 55 10 STF 3128 AC 2015 4 86 97.1 7.82 13.60 5.78
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 162756 Constellation Ophiuchus SAO 141935 HIP 87533
Tycho2 5674-00028-1 Gaia DR2 4171536120668840320 HD 162756 GC 24300
ADS 10858 BD BD-07 4517 Distance 58.45 Distance ly 190.66
 
 
ORBITAL ELEMENTS
 
 
Period (P)353.8939y± 59.0897 Periastron (T)1946.8899y± 1.5835 Semi-major axis (a)0.90295a± 0.09731
Eccentricity (e)0.94042± 0.01555 Inclination (i)158.548°± 13.845 Longitude of periastron (ω)160.838°± 47.693
Node (Ω)19.871°± 43.216 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 52.2 1.111
2001 52.0 1.122
2002 51.8 1.134
2003 51.6 1.145
2004 51.4 1.156
2005 51.2 1.167
2006 51.0 1.177
2007 50.8 1.188
2008 50.7 1.198
2009 50.5 1.209
2010 50.3 1.219
2011 50.1 1.229
2012 49.9 1.239
2013 49.8 1.248
2014 49.6 1.258
2015 49.4 1.268
2016 49.3 1.277
2017 49.1 1.286
2018 49.0 1.295
2019 48.8 1.304
2020 48.7 1.313
2021 48.5 1.322
2022 48.4 1.331
2023 48.2 1.339
2024 48.1 1.348
2025 47.9 1.356
2026 47.8 1.364
2027 47.6 1.372
2028 47.5 1.380
2029 47.4 1.388
2030 47.2 1.396


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds17530-0755b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 17530-0755 STF 3128 AB (HD 162756) : NOTES
 
 
discov_num notes refcode
STF3128 Separation 0.56" of my single night's measure in 1958 (Pub Yerkes Obs B__1960b
IX, pt I, p 77) should read 0.22". B__1963a
Semi-major axis incorrectly given as 0.935 by Popovic & Catovic (1989) Pop1989b
should be 0.985 (erratum noted in Inf. Circ. 108, 1989)
HIP 87533. See Allen et al. (2000) for information on metallicity, AlC2000
age, galactic orbital parameters, etc.
 
 
REFERENCES
 
 
refcode metd author reference
AlC2000 Po - Allen, C., Poveda, A., & Herrera, M 2000A&A...356..529A
AlC2000 A&A 356, 529, 2000
B__1960b Ma j van den Bos, W.H. 1960PYerO...9....1B
B__1960b +Mb Pub. Yerkes Obs. 9, pt. 1, 1960
B__1963a Ma - van den Bos, W.H. 1963AJ.....68...57V
B__1963a AJ 68, 57, 1963
Izm2019 orb u Izmailov, I.S. 2019AstL...45...30I
Izm2019 Ast. Lett. 45, 30, 2019
Izm2019 (Orbital elements from weighted solutions used when available (Table 2),
Izm2019 unweighted elements (Table 1) used for remaining 29 systems.)
Pop1989b orb - Popovic, G.M. & Catovic, Z. 1989IAUDS.107....1P
Pop1989b Inf. Circ. 107, 1, 1989
 
 
DISCOVERER
 
 
idgroup discov author
1 STF Struve, F.G.W.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17530-0755 STF3128 AB 2006 24 51 1.2 7.82 9.95 G0IV-V NOD 175258.68-075508.0
17530-0755 STF3128 AB 2009 25 51 1.2 7.82 9.95 G0IV-V NOD 175258.68-075508.0
17530-0755 STF3128 AB 2015 28 50 1.3 7.82 9.95 G0IV-V NO 175258.64-075510.2
17530-0755 STF3128 AB 2016 29 50 1.3 7.82 9.95 G0IV-V NO 175258.64-075510.2

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

 
 
WDS 17530-0755 STF 3128 AB (HD 162756) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 17530-0755 STF 3128 AB (HD 162756) : MEASURES
 
 
No records found.

 
 
WDS 17530-0755 (HD 162756) : VIRTUAL EYEPIECE
 
 

17530-0755 STF3128A mag 7.82 Sp G0IV 17530-0755 STF3128B sep 1.3 P.A. 49.50 mag 9.95 Sp V 17530-0755 STF3128C sep 96.2 P.A. 85.60 mag 13.6 Sp V 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 17530-0755 (HD 162756) : ALADIN DSS IMAGE @ 17h 52m 58.64s -07° 55' 10.2"
 
 
 
 
WDS 17530-0755 STF 3128 AB (HD 162756) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

17530-0755 STF3128AB distance=0' 17527-0757 STF2234 distance=5' 17550-0744 LLO 14 distance=32' 17531-0852 HDS2523 distance=57' 17525-0649 WFC 200 distance=67' 17564-0845 RST3988 distance=72' 17489-0650 LDS 613 distance=90' 17475-0847 OSO 84AB distance=97' 17475-0847 OSO 84AC distance=97' 17475-0847 OSO 84AD distance=97' 17596-0820 GWP2751 distance=102' 17526-0609 EVS 32AB distance=107' 17526-0609 KRV 46AC distance=107' 17593-0651 STF2250AB distance=114' 17593-0651 SIN 106AC distance=114' 17476-0634 RST4576 distance=114' 17505-0603 LAF 59AB distance=118' 17505-0603 LAF 59AC distance=118' 17505-0603 LAF 59AD distance=118' 17505-0603 LAF 59AE distance=118' 17505-0603 LAF 59AF distance=118' 17505-0603 LAF 59AG distance=118' 17505-0603 LAF 59AH distance=118' 17505-0603 LAF 59AI distance=118' 17505-0603 LAF 59AJ distance=118' 17505-0603 LAF 59AK distance=118' 17505-0603 LAF 59AL distance=118' 17505-0603 LAF 59AM distance=118' 17505-0603 LAF 59AN distance=118' 17505-0603 LAF 59AO distance=118' 17505-0603 LAF 59AP distance=118' 17505-0603 LAF 59AQ distance=118' 17505-0603 LAF 59AR distance=118' 17505-0603 LAF 59AS distance=118' 17505-0603 LAF 59AT distance=118' 17505-0603 LAF 59AU distance=118' 17505-0603 LAF 59AV distance=118' 17505-0603 LAF 59AW distance=118' 17505-0603 LAF 59AX distance=118' 17505-0603 LAF 59A,Ya distance=118' 17505-0603 LAF 59A,Yb distance=118' 17505-0603 LAF 59A,Yc distance=118' 17505-0603 LAF 59A,Yd distance=118' 17505-0603 LAF 59A,Ye distance=118' 17505-0603 LAF 59A,Yf distance=118' 17505-0603 LAF 59A,Yg distance=118' 17505-0603 LAF 59A,Yh distance=118' 17505-0603 LAF 59A,Yi distance=118' 17505-0603 LAF 59A,Yj distance=118' 17505-0603 LAF 59A,Yk distance=118' 17505-0603 LAF 59A,Yl distance=118' 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 17530-0755 STF3128 AB 50 1.3
Show 17530-0755 STF3128 AC 86 97.1
Show 17527-0757 STF2234 198 16.9 5
Show 17550-0744 LLO 14 293 5.9 32
Show 17531-0852 HDS2523 253 0.3 57
Show 17525-0649 WFC 200 272 9.5 67
Show 17564-0845 RST3988 36 0.8 72
Show 17489-0650 LDS 613 133 4.0 90
Show 17475-0847 OSO 84 AB 210 12.0 97
Show 17475-0847 OSO 84 AC 319 16.0 97
Show 17475-0847 OSO 84 AD 303 21.2 97
Show 17596-0820 GWP2751 127 23.6 102
Show 17526-0609 EVS 32 AB 212 18.1 107
Show 17526-0609 KRV 46 AC 199 81.3 107
Show 17593-0651 STF2250 AB 344 7.8 114
Show 17593-0651 SIN 106 AC 92 45.0 114
Show 17476-0634 RST4576 274 2.8 114
Show 17505-0603 LAF 59 AB 119 2.8 118
Show 17505-0603 LAF 59 AC 5 3.3 118
Show 17505-0603 LAF 59 AD 154 3.4 118
Show 17505-0603 LAF 59 AE 245 3.7 118
Show 17505-0603 LAF 59 AF 153 3.9 118
Show 17505-0603 LAF 59 AG 159 4.2 118
Show 17505-0603 LAF 59 AH 23 4.4 118
Show 17505-0603 LAF 59 AI 112 4.5 118
Show 17505-0603 LAF 59 AJ 300 4.7 118
Show 17505-0603 LAF 59 AK 80 5.0 118
Show 17505-0603 LAF 59 AL 349 5.2 118
Show 17505-0603 LAF 59 AM 192 5.2 118
Show 17505-0603 LAF 59 AN 124 5.2 118
Show 17505-0603 LAF 59 AO 72 6.1 118
Show 17505-0603 LAF 59 AP 159 6.6 118
Show 17505-0603 LAF 59 AQ 85 6.7 118
Show 17505-0603 LAF 59 AR 353 6.9 118
Show 17505-0603 LAF 59 AS 91 7.1 118
Show 17505-0603 LAF 59 AT 79 7.3 118
Show 17505-0603 LAF 59 AU 177 7.4 118
Show 17505-0603 LAF 59 AV 18 7.4 118
Show 17505-0603 LAF 59 AW 75 7.5 118
Show 17505-0603 LAF 59 AX 135 7.7 118
Show 17505-0603 LAF 59 A,Ya 111 7.9 118
Show 17505-0603 LAF 59 A,Yb 198 8.2 118
Show 17505-0603 LAF 59 A,Yc 174 8.4 118
Show 17505-0603 LAF 59 A,Yd 244 8.6 118
Show 17505-0603 LAF 59 A,Ye 133 8.7 118
Show 17505-0603 LAF 59 A,Yf 319 9.0 118
Show 17505-0603 LAF 59 A,Yg 141 9.1 118
Show 17505-0603 LAF 59 A,Yh 153 9.2 118
Show 17505-0603 LAF 59 A,Yi 337 9.3 118
Show 17505-0603 LAF 59 A,Yj 142 9.3 118
Show 17505-0603 LAF 59 A,Yk 206 9.4 118

 
 
WDS 17530-0755 : COMPONENTS
 
 
  A B
B pa=49.5°
sep=1.26"
 
C pa=85.6°
sep=96.21"
pa=86.0°
sep=95.19"
 
 
17530-0755 A
 
 
Name HD 162756 Coord arcsec 2000 175258.64-075510.2 Mag 7.82 Spectral class G0IV (yellow)
PmRA -63.00 PmDE -255.0 SAO 141935 HIP 87533
Tycho2 5674-00028-1 HD 162756 GC 24300 BD BD-07 4517
Tycho2
Tycho2 5674-00028-1 Pflag P RAmdeg 268.24436655 DEmdeg -7.91951035
PmRA -65.5 PmDE -254.8 E RAmdeg 6 E DEmdeg 7
E pmRA 2.2 E pmDE 2.3 EpRAm 1991.72 EpDEm 1991.59
Num 5 Q RAmdeg 0.8 Q DEmdeg 0.7 Q pmRA 0.8
Q pmDE 0.7 BTmag 8.464 E BTmag 0.017 VTmag 7.820
E VTmag 0.012 Prox 10 TYC T HIP 87533
CCDM A RAdeg 268.24450500 DEdeg -7.91893389 EpRA 1990 1.83
EpDE 1990 1.74 E RAdeg 5.5 E DEdeg 6.9 Posflg D
Corr -0.2
SAO
SAO 141935 DelFlag RA1950 PmRA1950 -0.0034
DE1950 PmDE1950 -0.256 Vmag 7.6 SpType G5
Double code Source 70 CatNum 24300 DM BD-07 4517
DMcomp BDsup HD 162756 M HD 0
GC 24300 RA1950rad 4.66990772 DE1950rad -0.13798319 PmRA2000 -0.0031
PmDE2000 -0.254
Hipparcos
Catalog H HIP 87533 Proxy H RAhms 17 52 58.68
DEdms -07 55 08.0 Vmag 7.64 VarFlag R Vmag G
RAdeg 268.245 DEdeg -7.9189 AstroRef A Plx 15.08
CCDM 17530-0755 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 54 Rho 0.979 HD 162756 BD BD-07 4517
CD CP Dm number -07 4517 VIred 0.7
SpType G0IV-Vvar R SpType Coord arcsec 2000 175258.68-075508.0
Hipparcos 2
HIP 87533 Sn 15 So 3 Nc 2
RArad 4.6817500242 DErad -0.1382108862 Plx 17.11 PmRA -63.36
PmDE -254.79 E RArad 0.89 E DErad 0.55 E Plx 0.95
E pmRA 1 E pmDE 0.6 Hpmag 7.7622 E Hpmag 0.0015
SHp 0.008 VA 0 BV 0.631 E BV 0.015
VI 0.7
CCDM
Ccdm 17530-0755 RComp Comp A Note1
Note2 Discov num DRAs -1.24 DDEs -10.4
R dRAs 10 Year Theta Rho
Obs 3 Vmag 7.6 Sp G5 PmNote *
PmRA -50 PmDE -256 Dm number -07 4517 Cat1 BD
Name2 141935 Cat2 SAO HD 162756 M HD
ADS BDS A10858 M ADS BDS N IDS IDS 17476S0753A
HIC 87533
 
 
17530-0755 B
 
 
Coord arcsec 2000 175258.70-075509.4 Mag 9.95 Spectral class V PmRA -66.00
PmDE -255.0 Tycho2 5674-00028-2 Calc delta mag 2.13 Calc coord yes
Tycho2
Tycho2 5674-00028-2 Pflag P RAmdeg 268.24436655 DEmdeg -7.91951035
PmRA -65.5 PmDE -254.8 E RAmdeg 6 E DEmdeg 7
E pmRA 2.2 E pmDE 2.3 EpRAm 1991.72 EpDEm 1991.59
Num 5 Q RAmdeg 0.8 Q DEmdeg 0.7 Q pmRA 0.8
Q pmDE 0.7 BTmag 10.960 E BTmag 0.063 VTmag 9.952
E VTmag 0.039 Prox 10 TYC HIP 87533
CCDM B RAdeg 268.24473972 DEdeg -7.91877306 EpRA 1990 1.84
EpDE 1990 1.76 E RAdeg 25.7 E DEdeg 33.2 Posflg D
Corr -0.3
CCDM
Ccdm 17530-0755 RComp Comp B Note1 *
Note2 Discov num STF3128 DRAs DDEs
R dRAs Year 1938 Theta 002 Rho 0.4
Obs 10 Vmag 11.1 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A10858 M ADS BDS N N IDS IDS 17476S0753B
HIC 87533
 
 
17530-0755 C
 
 
Coord arcsec 2000 175305.10-075502.7 Mag 13.6 Spectral class V Calc delta mag 5.78
Calc coord yes
CCDM
Ccdm 17530-0755 RComp Comp C Note1
Note2 Discov num STF3128 DRAs DDEs
R dRAs Year 1911 Theta 102 Rho 92.7
Obs 1 Vmag 13.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A10858 M ADS BDS N IDS IDS 17476S0753C
HIC