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Doubles in session


Current system
19487+3519
STT 387
HD 187458


Nearby doubles
8' : 19492+3514
SEI 688

10' : 19495+3517
SEI 689

10' : 19480+3513
BU 1473AB

12' : 19479+3526
ALI 163

18' : 19477+3531
ES 2244

19' : 19478+3533
ES 2245

24' : 19493+3542
POP 100

29' : 19496+3545
POP 101AB

29' : 19486+3450
HU 682

30' : 19469+3500
TDT1737

31' : 19497+3547
POP 102AB

33' : 19496+3448
SEI 690

33' : 19467+3504
GYL 91

34' : 19494+3446
BKO 519

36' : 19490+3443
SEI 686

36' : 19513+3535
SEI 702

39' : 19493+3441
BKO 518

40' : 19459+3501
H 5 137AB

41' : 19476+3557
ES 2182

41' : 19498+3558
POP 104AB

42' : 19467+3552
HU 681

42' : 19518+3501
SEI 705

43' : 19471+3441
GRV 277

44' : 19503+3558
DAM 182AB

45' : 19512+3551
ES 2246

46' : 19510+3443
SEI 697



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.

19487+3519 STT 387 (HD 187458)

 
 
19h 48m 43.81s +35° 18' 41.3" P.A. 94.00 sep 0.5 mag 7.12,7.90 Sp F6V dist. 63.69 pc (207.76 l.y.)
 
 
Coord 2000 19487+3519 Discov num STT 387 Comp Coord arcsec 2000 19 48 43.81 +35 18 41.3
Date first 1843 Date last 2020 Obs 369
Pa first 118 Pa last 94.4 P.A. Now (θ) 88.4°
Sep first 0.5 Sep last 0.47 Sep. Now (ρ) 0.426"
Mag pri 7.12 Mag sec 7.90 delta mag (ΔM) 0.78 Spectral class F6V (yellow-white)
Pri motion ra +074 Sec motion ra +074
Pri motion dec +063 Sec motion dec +063
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 187458 Constellation Cygnus SAO 68893 HIP 97477
Tycho2 2677-00745-1 Gaia DR2 2047612532947953152 HD 187458 HR 7550
GC 27432 ADS 12972 BD BD+34 3727 Distance 63.69
Distance ly 207.76
 
 
ORBITAL ELEMENTS
 
 
Period (P)165y± 1.9 Periastron (T)1870.9y± 6.6 Semi-major axis (a)0.641a± 0.004
Eccentricity (e)0.058± 0.002 Inclination (i)131.8°± 0.8 Longitude of periastron (ω)105°± 12
Node (Ω)154.4°± 0.7 Notesn ReferenceMsn2021c
Equinox Last observation2018 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 140.7 0.614
2001 139.1 0.608
2002 137.5 0.602
2003 135.8 0.595
2004 134.1 0.587
2005 132.4 0.580
2006 130.6 0.572
2007 128.7 0.563
2008 126.8 0.555
2009 124.8 0.546
2010 122.8 0.537
2011 120.7 0.527
2012 118.5 0.518
2013 116.2 0.509
2014 113.9 0.499
2015 111.4 0.490
2016 108.9 0.481
2017 106.3 0.472
2018 103.6 0.463
2019 100.7 0.455
2020 97.8 0.447
2021 94.7 0.439
2022 91.6 0.432
2023 88.4 0.426
2024 85.0 0.420
2025 81.6 0.415
2026 78.1 0.411
2027 74.5 0.408
2028 70.9 0.405
2029 67.3 0.404
2030 63.6 0.403


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


 
  


wds19487%2B3519c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 19487+3519 STT 387 (HD 187458) : NOTES
 
 
discov_num notes refcode
STT 387 Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 2.53 +/- 0.32, 2.74, and 1.17 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Msn2021c orb - Josties, J. & Mason, B.D. 2021IAUDS.205....1M
Msn2021c Inf. Circ. 205, 1, 2021
 
 
DISCOVERER
 
 
idgroup discov author
1 STT Struve, O.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19487+3519 STT 387 2007 353 127 0.6 7.12 7.90 F6V NOD 194843.81+351841.3
19487+3519 STT 387 2010 360 122 0.5 7.12 7.90 F6V NOD 194843.81+351841.3
19487+3519 STT 387 2012 362 118 0.5 7.12 7.90 F6V NOD 194843.81+351841.3
19487+3519 STT 387 2013 353 114 0.5 7.12 7.90 F6V NO 194843.81+351841.3
19487+3519 STT 387 2015 355 111 0.5 7.12 7.90 F6V NO 194843.81+351841.3
19487+3519 STT 387 2016 356 106 0.5 7.12 7.90 F6V NO 194843.81+351841.3
19487+3519 STT 387 2018 359 105 0.4 7.12 7.90 F6V NO 194843.81+351841.3
19487+3519 STT 387 2020 362 94 0.5 7.12 7.90 F6V NO 194843.81+351841.3

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

 
 
WDS 19487+3519 STT 387 (HD 187458) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 19487+3519 STT 387 (HD 187458) : MEASURES
 
 
No records found.

 
 
WDS 19487+3519 (HD 187458) : VIRTUAL EYEPIECE
 
 

19487+3519 STT 387A mag 7.12 Sp F6V 19487+3519 STT 387B sep 0.4 P.A. 95.40 mag 7.9 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 19487+3519 (HD 187458) : ALADIN DSS IMAGE @ 19h 48m 43.81s +35° 18' 41.3"
 
 
 
 
WDS 19487+3519 STT 387 (HD 187458) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

19487+3519 STT 387 distance=1' 19492+3514 SEI 688 distance=8' 19495+3517 SEI 689 distance=10' 19480+3513 BU 1473AB distance=10' 19480+3513 SEI 684AC distance=10' 19479+3526 ALI 163 distance=12' 19477+3531 ES 2244 distance=18' 19478+3533 ES 2245 distance=19' 19493+3542 POP 100 distance=24' 19496+3545 DAM1259BC distance=29' 19496+3545 POP 101AB distance=29' 19486+3450 HU 682 distance=29' 19469+3500 TDT1737 distance=30' 19497+3547 POP 102AB distance=31' 19497+3547 POP 102AC distance=31' 19496+3448 SEI 690 distance=33' 19467+3504 GYL 91 distance=33' 19494+3446 BKO 519 distance=34' 19490+3443 SEI 686 distance=36' 19513+3535 SEI 702 distance=36' 19493+3441 BKO 518 distance=39' 19459+3501 H 5 137AB distance=40' 19459+3501 BOT 3AC distance=40' 19459+3501 ACA 1AD distance=40' 19476+3557 ES 2182 distance=41' 19498+3558 POP 104AB distance=41' 19498+3558 DAM 181AC distance=41' 19498+3558 CVE 4AD distance=41' 19467+3552 HU 681 distance=42' 19518+3501 SEI 705 distance=42' 19471+3441 GRV 277 distance=43' 19503+3558 DAM 182AB distance=44' 19503+3558 DAM 182AC distance=44' 19512+3551 ES 2246 distance=45' 19510+3443 SEI 697 distance=46' 19511+3443 OLE 2 distance=47' 19458+3548 ALI 162 distance=47' 19524+3537 HU 685 distance=49' 19514+3435 J 1160AB distance=50' 19514+3435 J 1160AC distance=50' 19514+3435 COU2709AD distance=50' 19520+3449 ES 2299 distance=50' 19522+3449 ES 2300 distance=51' 19513+3434 SEI 699AB distance=54' 19513+3434 SEI 700AC distance=54' 19531+3517 POP 37 distance=55' 19508+3430 SEI 696 distance=55' 19507+3429 SEI 695AB distance=55' 19507+3429 POP1227AC distance=55' 19514+3434 J 1161 distance=56' 19509+3429 POP 13AB distance=57' 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 19487+3519 STT 387 94 0.5 1
Show 19492+3514 SEI 688 198 10.8 8
Show 19495+3517 SEI 689 301 20.9 10
Show 19480+3513 BU 1473 AB 16 1.4 10
Show 19480+3513 SEI 684 AC 234 26.1 10
Show 19479+3526 ALI 163 174 9.4 12
Show 19477+3531 ES 2244 21 3.0 18
Show 19478+3533 ES 2245 89 2.6 19
Show 19493+3542 POP 100 286 2.3 24
Show 19496+3545 DAM1259 BC 79 2.4 29
Show 19496+3545 POP 101 AB 134 6.2 29
Show 19486+3450 HU 682 120 0.3 29
Show 19469+3500 TDT1737 285 0.6 30
Show 19497+3547 POP 102 AB 139 4.9 31
Show 19497+3547 POP 102 AC 81 14.5 31
Show 19496+3448 SEI 690 296 15.8 33
Show 19467+3504 GYL 91 192 36.5 33
Show 19494+3446 BKO 519 135 5.5 34
Show 19490+3443 SEI 686 221 21.2 36
Show 19513+3535 SEI 702 258 18.4 36
Show 19493+3441 BKO 518 140 10.5 39
Show 19459+3501 H 5 137 AB 25 38.8 40
Show 19459+3501 BOT 3 AC 76 443.8 40
Show 19459+3501 ACA 1 AD 38 224.8 40
Show 19476+3557 ES 2182 44 1.9 41
Show 19498+3558 POP 104 AB 55 4.7 41
Show 19498+3558 DAM 181 AC 255 4.5 41
Show 19498+3558 CVE 4 AD 151 2.7 41
Show 19467+3552 HU 681 193 2.0 42
Show 19518+3501 SEI 705 131 9.3 42
Show 19471+3441 GRV 277 22 22.9 43
Show 19503+3558 DAM 182 AB 60 7.8 44
Show 19503+3558 DAM 182 AC 170 9.6 44
Show 19512+3551 ES 2246 244 7.1 45
Show 19510+3443 SEI 697 310 4.0 46
Show 19511+3443 OLE 2 309 4.0 47
Show 19458+3548 ALI 162 204 9.0 47
Show 19524+3537 HU 685 63 1.6 49
Show 19514+3435 J 1160 AB 293 6.2 50
Show 19514+3435 J 1160 AC 57 6.8 50
Show 19514+3435 COU2709 AD 149 10.7 50
Show 19520+3449 ES 2299 124 5.8 50
Show 19522+3449 ES 2300 250 5.9 51
Show 19513+3434 SEI 699 AB 241 4.0 54
Show 19513+3434 SEI 700 AC 178 25.8 54
Show 19531+3517 POP 37 332 2.5 55
Show 19508+3430 SEI 696 129 19.3 55
Show 19507+3429 SEI 695 AB 351 8.7 55
Show 19507+3429 POP1227 AC 291 48.9 55
Show 19514+3434 J 1161 314 5.0 56
Show 19509+3429 POP 13 AB 357 4.0 57

 
 
WDS 19487+3519 : COMPONENTS
 
 
  A
B pa=95.4°
sep=0.38"
 
 
19487+3519 A
 
 
Componente originario normalizzato AB Name HD 187458 Coord arcsec 2000 194843.81+351841.3 Mag 7.12
Spectral class F6V (yellow-white) PmRA 74.00 PmDE 63.0 SAO 68893
HIP 97477 Tycho2 2677-00745-1 HD 187458 HR 7550
GC 27432 ADS 12972 BD BD+34 3727
Tycho2
Tycho2 2677-00745-1 Pflag RAmdeg 297.18254617 DEmdeg 35.31141530
PmRA 73.9 PmDE 63.4 E RAmdeg 4 E DEmdeg 4
E pmRA 1.1 E pmDE 1.1 EpRAm 1991.24 EpDEm 1991.47
Num 13 Q RAmdeg 1.2 Q DEmdeg 1.5 Q pmRA 1.3
Q pmDE 1.5 BTmag 7.215 E BTmag 0.015 VTmag 6.762
E VTmag 0.010 Prox 999 TYC T HIP 97477
CCDM AB RAdeg 297.18233111 DEdeg 35.31126806 EpRA 1990 1.46
EpDE 1990 1.66 E RAdeg 4.0 E DEdeg 3.7 Posflg P
Corr 0.2
SAO
SAO 68893 DelFlag RA1950 PmRA1950 0.0067
DE1950 PmDE1950 0.063 Vmag 6.5 SpType F5
Double code Source 70 CatNum 27432 DM BD+34 3727
DMcomp BDsup HD 187458 M HD 0
GC 27432 RA1950rad 5.17866973 DE1950rad 0.61408286 PmRA2000 0.007
PmDE2000 0.062
Hipparcos
Catalog H HIP 97477 Proxy H RAhms 19 48 43.75
DEdms +35 18 40.7 Vmag 6.66 VarFlag R Vmag H
RAdeg 297.182 DEdeg 35.3113 AstroRef A Plx 14.99
CCDM 19487+3519 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 154 Rho 0.653 HD 187458 BD BD+34 3727
CD CP Dm number +34 3727 VIred 0.51
SpType F4V R SpType Coord arcsec 2000 194843.75+351840.7
Hipparcos 2
HIP 97477 Sn 15 So 3 Nc 2
RArad 5.1868095785 DErad 0.6162986252 Plx 15.7 PmRA 69.56
PmDE 61.72 E RArad 0.48 E DErad 0.71 E Plx 0.66
E pmRA 0.53 E pmDE 0.84 Hpmag 6.7553 E Hpmag 0.0006
SHp 0.007 VA 0 BV 0.437 E BV 0.013
VI 0.51
CCDM
Ccdm 19487+3519 RComp Comp A Note1
Note2 Discov num DRAs 1.79 DDEs -18.3
R dRAs 10 Year Theta Rho
Obs 2 Vmag 6.9 Sp F5 PmNote *
PmRA 71 PmDE 85 Dm number +34 3727 Cat1 BD
Name2 +35 1879 Cat2 AGK2/3 HD 187458 M HD
ADS BDS A12972 M ADS BDS N IDS IDS 19450N3504A
HIC 97477
 
 
19487+3519 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 194843.84+351841.3 Mag 7.9 PmRA 74.00
PmDE 63.0 Calc delta mag 0.78 Calc coord yes
CCDM
Ccdm 19487+3519 RComp Comp B Note1 *
Note2 Discov num STT 387 DRAs DDEs
R dRAs Year 1944 Theta Rho
Obs 99 Vmag 7.9 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A12972 M ADS BDS N IDS IDS 19450N3504B
HIC 97477