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Doubles in session


Current system
18540+3723
BU 137 AB
HD 175491


Nearby doubles
8' : 18545+3719
HO 90

9' : 18534+3728
HO 89

21' : 18541+3743
TOI1191

22' : 18523+3713
COU1311

25' : 18527+3704
UC 3706

25' : 18550+3702
L 41

25' : 18520+3731
ES 2026AB

25' : 18537+3658
H 6 3

29' : 18546+3656
ELS 7AB

29' : 18559+3707
ES 2486

29' : 18536+3752
ES 2027

30' : 18545+3654
ES 2028AB

31' : 18532+3654
TDT1110

33' : 18516+3739
ES 2025AB

33' : 18536+3651
UC 3714

40' : 18551+3645
ES 2485

43' : 18572+3704
ES 2030AB

45' : 18516+3648
ES 241

49' : 18562+3803
UC 3731

52' : 18536+3814
UC 3713

63' : 18530+3621
HJ 1354AB

67' : 18590+3654
ES 2032

70' : 18483+3741
UC 3677

70' : 18529+3614
A 1383

71' : 18581+3813
STF2427AB

73' : 18548+3611
ES 2029



Selections
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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.

18540+3723 BU 137 AB (HD 175491)

 
 
18h 53m 57.56s +37° 22' 49.7" P.A. 167.00 sep 1.6 mag 8.69,9.02 Sp G5III-IV
 
 
Coord 2000 18540+3723 Discov num BU  137 Comp AB Coord arcsec 2000 18 53 57.56 +37 22 49.7
Date first 1873 Date last 2022 Obs 136
Pa first 140 Pa last 166.5 P.A. Now (θ) 166.5°
Sep first 1.5 Sep last 1.566 Sep. Now (ρ) 1.566"
Mag pri 8.69 Mag sec 9.02 delta mag (ΔM) 0.33 Spectral class G5III-IV (yellow)
Pri motion ra -016 Sec motion ra -016
Pri motion dec +045 Sec motion dec +045
Notes O (Orbital solution)
This double is physical.
 
 
18540+3723 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 175491 67544 18 53 58 +37 22 50 BU 137 AB 2022 136 167 1.6 8.69 9.02 0.33 Y <===
Show 67544 18 53 58 +37 22 50 BU 137 AC 2015 20 146 23.6 8.69 12.00 3.31
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 175491 Constellation Lyra SAO 67544 Tycho2 2650-01881-1
Gaia DR2 2094001134684220800 HD 175491
 
 
ORBITAL ELEMENTS
 
 
Period (P)1135.7351y± 534.7085 Periastron (T)2080.596y± 24.2257 Semi-major axis (a)3.61436a± 1.77418
Eccentricity (e)0.77425± 0.20302 Inclination (i)76.953°± 8.455 Longitude of periastron (ω)69.393°± 20.21
Node (Ω)177.051°± 6.145 Notes ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 160.3 1.554
2001 160.5 1.554
2002 160.8 1.555
2003 161.0 1.555
2004 161.3 1.555
2005 161.5 1.555
2006 161.8 1.555
2007 162.0 1.554
2008 162.2 1.554
2009 162.5 1.553
2010 162.7 1.552
2011 163.0 1.551
2012 163.2 1.550
2013 163.5 1.549
2014 163.7 1.547
2015 164.0 1.546
2016 164.2 1.544
2017 164.5 1.542
2018 164.7 1.539
2019 165.0 1.537
2020 165.2 1.534
2021 165.5 1.531
2022 165.7 1.528
2023 166.0 1.524
2024 166.2 1.521
2025 166.5 1.517
2026 166.7 1.513
2027 167.0 1.508
2028 167.3 1.503
2029 167.5 1.498
2030 167.8 1.493


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


 
  


wds18540%2B3723a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18540+3723 BU 137 AB (HD 175491) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
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.)
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18540+3723 BU 137 AB 2005 129 162 1.5 8.69 9.02 G5III-IV 185357.56+372249.7
18540+3723 BU 137 AB 2009 133 163 1.6 8.69 9.02 G5III-IV 185357.56+372249.7
18540+3723 BU 137 AB 2011 136 163 1.5 8.69 9.02 G5III-IV 185357.56+372249.7
18540+3723 BU 137 AB 2013 127 164 1.5 8.69 9.02 G5III-IV 185357.56+372249.7
18540+3723 BU 137 AB 2015 128 163 1.6 8.69 9.02 G5III-IV 185357.56+372249.7
18540+3723 BU 137 AB 2019 133 166 1.6 8.69 9.02 G5III-IV O 185357.56+372249.7
18540+3723 BU 137 AB 2020 135 203 1.3 8.69 9.02 G5III-IV O 185357.56+372249.7
18540+3723 BU 137 AB 2022 136 167 1.6 8.69 9.02 G5III-IV O 185357.56+372249.7

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

 
 
WDS 18540+3723 BU 137 AB (HD 175491) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18540+3723 BU 137 AB (HD 175491) : MEASURES
 
 
No records found.

 
 
WDS 18540+3723 (HD 175491) : VIRTUAL EYEPIECE
 
 

18540+3723 BU 137A mag 8.69 Sp G5III 18540+3723 BU 137B sep 1.6 P.A. 169.20 mag 9.02 Sp IV 18540+3723 BU 137C sep 22.2 P.A. 151.60 mag 12 Sp IV 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 18540+3723 (HD 175491) : ALADIN DSS IMAGE @ 18h 53m 57.56s +37° 22' 49.7"
 
 
 
 
WDS 18540+3723 BU 137 AB (HD 175491) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18540+3723 BU 137AB distance=0' 18545+3719 HO 90 distance=8' 18534+3728 HO 89 distance=9' 18541+3743 TOI1191 distance=21' 18523+3713 COU1311 distance=22' 18527+3704 UC 3706 distance=25' 18520+3731 ES 2026BC distance=25' 18550+3702 L 41 distance=25' 18520+3731 ES 2026AB distance=25' 18537+3658 H 6 3 distance=25' 18545+3654 SMR 13HI distance=29' 18546+3656 ELS 7AB distance=29' 18546+3656 ELS 7AC distance=29' 18545+3654 ES 2028BC distance=29' 18559+3707 ES 2486 distance=29' 18536+3752 ES 2027 distance=29' 18545+3654 ES 2028AB distance=30' 18545+3654 SMR 13AD distance=30' 18545+3654 SMR 13AE distance=30' 18545+3654 SMR 13AF distance=30' 18545+3654 SMR 13AG distance=30' 18545+3654 SMR 13AH distance=30' 18545+3654 SMR 13AJ distance=30' 18545+3654 SMR 13AK distance=30' 18532+3654 TDT1110 distance=31' 18516+3739 ES 2025AB distance=33' 18516+3739 ES 2025AD distance=33' 18516+3739 FYM 39AE distance=33' 18516+3739 FYM 39AF distance=33' 18516+3739 FYM 39AG distance=33' 18536+3651 UC 3714 distance=33' 18516+3739 ES 2025BC distance=33' 18516+3739 ES 2025BD distance=33' 18551+3645 ES 2485 distance=40' 18572+3704 ES 2030AB distance=43' 18572+3704 ES 2030AC distance=43' 18516+3648 ES 241 distance=45' 18562+3803 UC 3731 distance=49' 18536+3814 UC 3713 distance=52' 18530+3621 HJ 1354AB distance=63' 18590+3654 ES 2032 distance=67' 18483+3741 UC 3677 distance=70' 18529+3614 A 1383 distance=70' 18581+3813 STF2427AB distance=71' 18581+3813 CTT 11AD distance=71' 18581+3813 STF2427AC distance=71' 18581+3813 SP 2AE distance=71' 18581+3813 STF2427BC distance=72' 18581+3813 SP 2BE distance=72' 18581+3813 SMR 14EF distance=72' 18581+3813 FYM 27EG distance=72' 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 18540+3723 BU 137 AB 167 1.6
Show 18540+3723 BU 137 AC 146 23.6
Show 18545+3719 HO 90 228 4.0 8
Show 18534+3728 HO 89 170 6.0 9
Show 18541+3743 TOI1191 86 0.7 21
Show 18523+3713 COU1311 226 1.3 22
Show 18527+3704 UC 3706 241 15.4 25
Show 18520+3731 ES 2026 BC 334 4.6 25
Show 18550+3702 L 41 32 1.7 25
Show 18520+3731 ES 2026 AB 112 20.5 25
Show 18537+3658 H 6 3 20 175.3 25
Show 18545+3654 SMR 13 HI 251 26.1 29
Show 18546+3656 ELS 7 AB 338 8.5 29
Show 18546+3656 ELS 7 AC 121 10.3 29
Show 18545+3654 ES 2028 BC 135 2.1 29
Show 18559+3707 ES 2486 269 7.9 29
Show 18536+3752 ES 2027 137 4.1 29
Show 18545+3654 ES 2028 AB 349 86.3 30
Show 18545+3654 SMR 13 AD 210 193.1 30
Show 18545+3654 SMR 13 AE 238 400.6 30
Show 18545+3654 SMR 13 AF 245 369.4 30
Show 18545+3654 SMR 13 AG 261 335.9 30
Show 18545+3654 SMR 13 AH 284 229.4 30
Show 18545+3654 SMR 13 AJ 249 279.5 30
Show 18545+3654 SMR 13 AK 236 304.2 30
Show 18532+3654 TDT1110 3 1.3 31
Show 18516+3739 ES 2025 AB 353 25.0 33
Show 18516+3739 ES 2025 AD 356 30.1 33
Show 18516+3739 FYM 39 AE 299 63.2 33
Show 18516+3739 FYM 39 AF 205 87.9 33
Show 18516+3739 FYM 39 AG 116 55.1 33
Show 18536+3651 UC 3714 305 76.2 33
Show 18516+3739 ES 2025 BC 78 5.9 33
Show 18516+3739 ES 2025 BD 11 5.3 33
Show 18551+3645 ES 2485 162 6.2 40
Show 18572+3704 ES 2030 AB 233 2.9 43
Show 18572+3704 ES 2030 AC 240 12.7 43
Show 18516+3648 ES 241 72 2.2 45
Show 18562+3803 UC 3731 213 23.7 49
Show 18536+3814 UC 3713 297 81.8 52
Show 18530+3621 HJ 1354 AB 5 10.2 63
Show 18590+3654 ES 2032 247 4.2 67
Show 18483+3741 UC 3677 338 64.3 70
Show 18529+3614 A 1383 299 1.4 70
Show 18581+3813 STF2427 AB 59 55.9 71
Show 18581+3813 CTT 11 AD 291 57.2 71
Show 18581+3813 STF2427 AC 61 62.0 71
Show 18581+3813 SP 2 AE 350 162.3 71
Show 18581+3813 STF2427 BC 79 7.2 72
Show 18581+3813 SP 2 BE 330 150.2 72
Show 18581+3813 SMR 14 EF 331 82.7 72

 
 
WDS 18540+3723 : COMPONENTS
 
 
  A B
B pa=169.2°
sep=1.55"
 
C pa=151.6°
sep=22.20"
pa=150.3°
sep=20.73"
 
 
18540+3723 A
 
 
Name HD 175491 Coord arcsec 2000 185357.56+372249.7 Mag 8.69 Spectral class G5III (yellow)
PmRA -16.00 PmDE 45.0 SAO 67544 Tycho2 2650-01881-1
HD 175491 DM BD+37 3276
Tycho2
Tycho2 2650-01881-1 Pflag P RAmdeg 283.48985667 DEmdeg 37.38048785
PmRA -16.2 PmDE 45.2 E RAmdeg 9 E DEmdeg 9
E pmRA 2.4 E pmDE 2.3 EpRAm 1991.32 EpDEm 1991.33
Num 5 Q RAmdeg 1.1 Q DEmdeg 1.1 Q pmRA 1.1
Q pmDE 1.1 BTmag 9.494 E BTmag 0.020 VTmag 8.694
E VTmag 0.014 Prox 15 TYC T HIP
CCDM RAdeg 283.48982528 DEdeg 37.38053417 EpRA 1990 1.58
EpDE 1990 1.62 E RAdeg 8.7 E DEdeg 8.6 Posflg D
Corr 0.1
SAO
SAO 67544 DelFlag RA1950 PmRA1950 -0.0015
DE1950 PmDE1950 0.034 Vmag 7.4 SpType G0
Double code Source 5 CatNum 1711 DM BD+37 3276
DMcomp BDsup HD 175491 M HD 0
GC RA1950rad 4.94026109 DE1950rad 0.65128504 PmRA2000 -0.0012
PmDE2000 0.034
CCDM
Ccdm 18540+3723 RComp Comp A Note1
Note2 Discov num DRAs -2.46 DDEs -10.2
R dRAs 10 Year Theta Rho
Obs 3 Vmag 8.2 Sp G0 PmNote *
PmRA -21 PmDE 45 Dm number +37 3276 Cat1 BD
Name2 +37 1711 Cat2 AGK2/3 HD 175491 M HD
ADS BDS A11811 M ADS BDS N IDS IDS 18505N3715A
HIC
 
 
18540+3723 B
 
 
Coord arcsec 2000 185357.58+372248.2 Mag 9.02 Spectral class IV PmRA -16.00
PmDE 45.0 Tycho2 2650-01881-2 Calc delta mag 0.33 Calc coord yes
Tycho2
Tycho2 2650-01881-2 Pflag P RAmdeg 283.48985667 DEmdeg 37.38048785
PmRA -16.2 PmDE 45.2 E RAmdeg 9 E DEmdeg 9
E pmRA 2.4 E pmDE 2.3 EpRAm 1991.32 EpDEm 1991.33
Num 5 Q RAmdeg 1.1 Q DEmdeg 1.1 Q pmRA 1.1
Q pmDE 1.1 BTmag 9.772 E BTmag 0.024 VTmag 9.018
E VTmag 0.017 Prox 15 TYC T HIP
CCDM RAdeg 283.49003028 DEdeg 37.38014194 EpRA 1990 1.60
EpDE 1990 1.63 E RAdeg 10.8 E DEdeg 11.0 Posflg D
Corr 0.1
CCDM
Ccdm 18540+3723 RComp Comp B Note1
Note2 Discov num BU 137 DRAs DDEs
R dRAs Year 1959 Theta 150 Rho 1.4
Obs 99 Vmag 8.7 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11811 M ADS BDS N IDS IDS 18505N3715B
HIC
 
 
18540+3723 C
 
 
Coord arcsec 2000 185358.44+372230.2 Mag 12 Spectral class IV PmRA -7.00
PmDE -11.0 Calc delta mag 3.31 Calc coord yes
CCDM
Ccdm 18540+3723 RComp Comp C Note1
Note2 Discov num BU 137 DRAs DDEs
R dRAs Year 1924 Theta 144 Rho 18.7
Obs 1 Vmag 11.1 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11811 M ADS BDS N IDS IDS 18505N3715C
HIC