18355+2336 STT 359 (HD 171745)

 
 
18h 35m 30.40s +23° 36' 19.9" P.A. 5.00 sep 0.8 mag 6.35,6.62 Sp G9III+ dist. 144.3 pc (470.71 l.y.)
 
 
Coord 2000 18355+2336 Discov num STT 359 Comp Coord arcsec 2000 18 35 30.40 +23 36 19.9
Date first 1843 Date last 2021 Obs 247
Pa first 0 Pa last 5.2 P.A. Now (θ) 3.2°
Sep first 0.9 Sep last 0.79 Sep. Now (ρ) 0.755"
Mag pri 6.35 Mag sec 6.62 delta mag (ΔM) 0.27 Spectral class G9III+ (yellow)
Pri motion ra +005 Sec motion ra +005
Pri motion dec +003 Sec motion dec +003
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 171745 Constellation Hercules SAO 86224 HIP 91139
Tycho2 2107-00474-1 HD 171745 HR 6980 GC 25407
ADS 11479 BD BD+23 3385 Distance 144.3 Distance ly 470.71
 
 
ORBITAL ELEMENTS
 
 
Period (P)219.3y± 8.8 Periastron (T)1929.081y± 0.54 Semi-major axis (a)0.425a± 0.014
Eccentricity (e)0.8393± 0.0066 Inclination (i)119.9°± 2 Longitude of periastron (ω)197.7°± 2.1
Node (Ω)10°± 1.2 Notesn ReferenceSca2009a
Equinox2000 Last observation2006 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 6.6 0.711
2001 6.4 0.714
2002 6.3 0.717
2003 6.1 0.720
2004 5.9 0.723
2005 5.8 0.726
2006 5.6 0.728
2007 5.5 0.731
2008 5.3 0.733
2009 5.2 0.735
2010 5.0 0.737
2011 4.9 0.739
2012 4.7 0.741
2013 4.6 0.743
2014 4.5 0.745
2015 4.3 0.746
2016 4.2 0.748
2017 4.0 0.749
2018 3.9 0.750
2019 3.7 0.751
2020 3.6 0.752
2021 3.5 0.753
2022 3.3 0.754
2023 3.2 0.755
2024 3.0 0.756
2025 2.9 0.756
2026 2.7 0.757
2027 2.6 0.757
2028 2.5 0.757
2029 2.3 0.757
2030 2.2 0.758


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



 
 


wds18355%2B2336b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS 18355+2336 STT 359 (HD 171745) : NOTES
 
 
discov_num notes refcode
STT 359 Spectrum composite; G9III+G7III.
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 4.80 +/- 1.54, 4.11, and 1.85 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
Sca2009a S j Scardia, M., Prieur, J.-L., Pansecchi, L., Argyle, R.W., & Sala, M. 2009AN....330...55S
Sca2009a +orb AN 330, 55, 2009
 
 
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
18355+2336 STT 359 2007 252 5 0.8 6.35 6.62 G9III-IV NOD 183530.40+233619.9
18355+2336 STT 359 2009 255 5 0.7 6.35 6.62 G9III-IV NOD 183530.40+233619.9
18355+2336 STT 359 2010 259 6 0.7 6.35 6.62 G9III-IV NOD 183530.40+233619.9
18355+2336 STT 359 2013 265 4 0.8 6.35 6.62 G9III-IV NO 183530.40+233619.9
18355+2336 STT 359 2015 235 6 0.7 6.35 6.62 G9III-IV NO 183530.40+233619.9
18355+2336 STT 359 2017 239 6 0.8 6.35 6.62 G9III-IV NO 183530.40+233619.9
18355+2336 STT 359 2018 242 4 0.7 6.35 6.62 G9III-IV NO 183530.40+233619.9
18355+2336 STT 359 2019 241 3 0.7 6.35 6.62 G9III-IV NO 183530.40+233619.9
18355+2336 STT 359 2021 246 5 0.8 6.35 6.62 G9III+ NO 183530.40+233619.9

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

 
 
WDS 18355+2336 STT 359 (HD 171745) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18355+2336 STT 359 (HD 171745) : MEASURES
 
 
No records found.

 
 
WDS 18355+2336 (HD 171745) : VIRTUAL EYEPIECE
 
 

18355+2336 STT 359A mag 6.35 Sp G9III 18355+2336 STT 359B sep 0.8 P.A. 4.80 mag 6.62 virtual eyepiece
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Radius:
Components only
 
 
WDS 18355+2336 (HD 171745) : ALADIN DSS IMAGE @ 18h 35m 30.40s +23° 36' 19.9"
 
 
 
 
WDS 18355+2336 STT 359 (HD 171745) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


18355+2336  STT 359 distance=0' 18361+2344  HDS2639 distance=12' 18349+2357  POU3435 distance=23' 18369+2323  TDT 958 distance=24' 18368+2320  POU3438AB distance=24' 18368+2320  POU3439AC distance=24' 18357+2403  POU3436 distance=26' 18370+2358  POU3440AB distance=30' 18370+2358  CVE  10AC distance=30' 18336+2321  POU3430 distance=31' 18371+2358  CVE  11 distance=32' 18330+2337  POU3428 distance=34' 18332+2326  POU3429 distance=35' 18330+2334  KPP 418 distance=35' 18351+2302  TDT 948 distance=36' 18370+2409  TDT 959 distance=39' 18327+2326  POU3424 distance=40' 18378+2310  POU3443 distance=41' 18327+2350  POU3425 distance=41' 18343+2258  TDT 938 distance=42' 18352+2419  KPP3331 distance=43' 18339+2300  POU3431 distance=44' 18324+2325  POU3422 distance=45' 18346+2422  POU3432 distance=45' 18377+2409  POU3444 distance=45' 18323+2350  POU3421 distance=46' 18334+2301  J   463AB distance=47' 18334+2301  J   463AB,C distance=47' 18322+2350  POU3420 distance=48' 18321+2342  POU3418 distance=48' 18390+2337  POU3453 distance=48' 18389+2324  TDT 972 distance=49' 18392+2341  POU3454 distance=52' 18319+2351  POU3417 distance=52' 18388+2309  POU3451 distance=53' 18354+2243  SLE 212 distance=54' 18318+2321  TDT 928 distance=54' 18330+2420  POU3427 distance=56' 18379+2421  POU3447 distance=56' 18350+2434  TDT 946 distance=58' 18317+2310  HU  321AB distance=59' 18317+2310  HU  321AC distance=59' 18396+2356  TDT 980 distance=59' 18362+2437  POU3437 distance=62' 18373+2433  POU3441 distance=62' 18401+2335  POU3461 distance=63' 18315+2405  POU3414 distance=63' 18400+2324  POU3460 distance=63' 18386+2422  POU3450 distance=63' 18387+2422  POU3452 distance=64' 18401+2351  POU3462BC distance=65' grafico limitrofi
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Pass over with the mouse cursor to display the catalog designation.

Show name coord_2000 discov# comp pa sep dist(')
Show 18355+2336 STT 359 5 0.8
Show 18361+2344 HDS2639 137 0.1 12
Show 18349+2357 POU3435 259 13.5 23
Show 18369+2323 TDT 958 255 0.4 24
Show 18368+2320 POU3438 AB 359 8.5 24
Show 18368+2320 POU3439 AC 56 15.2 24
Show 18357+2403 POU3436 167 4.9 26
Show 18370+2358 POU3440 AB 105 6.6 30
Show 18370+2358 CVE 10 AC 348 5.7 30
Show 18336+2321 POU3430 178 7.2 31
Show 18371+2358 CVE 11 108 11.7 32
Show 18330+2337 POU3428 257 14.6 34
Show 18332+2326 POU3429 3 11.3 35
Show 18330+2334 KPP 418 87 3.8 35
Show 18351+2302 TDT 948 222 2.5 36
Show 18370+2409 TDT 959 180 0.5 39
Show 18327+2326 POU3424 273 9.1 40
Show 18378+2310 POU3443 43 2.8 41
Show 18327+2350 POU3425 214 13.1 41
Show 18343+2258 TDT 938 67 0.9 42
Show 18352+2419 KPP3331 5 2.5 43
Show 18339+2300 POU3431 342 6.8 44
Show 18324+2325 POU3422 177 12.0 45
Show 18346+2422 POU3432 170 8.6 45
Show 18377+2409 POU3444 349 5.3 45
Show 18323+2350 POU3421 165 4.2 46
Show 18334+2301 J 463 AB 224 1.9 47
Show 18334+2301 J 463 AB,C 97 23.8 47
Show 18322+2350 POU3420 355 2.8 48
Show 18321+2342 POU3418 129 7.0 48
Show 18390+2337 POU3453 102 10.1 48
Show 18389+2324 TDT 972 47 0.8 49
Show 18392+2341 POU3454 274 13.3 52
Show 18319+2351 POU3417 125 9.3 52
Show 18388+2309 POU3451 310 7.4 53
Show 18354+2243 SLE 212 255 14.3 54
Show 18318+2321 TDT 928 167 0.6 54
Show 18330+2420 POU3427 81 6.8 56
Show 18379+2421 POU3447 222 14.0 56
Show 18350+2434 TDT 946 91 0.8 58
Show 18317+2310 HU 321 AB 21 20.6 59
Show 18317+2310 HU 321 AC 342 74.4 59
Show 18396+2356 TDT 980 102 0.3 59
Show 18362+2437 POU3437 284 5.0 62
Show 18373+2433 POU3441 211 11.2 62
Show 18401+2335 POU3461 244 3.1 63
Show 18315+2405 POU3414 260 17.8 63
Show 18400+2324 POU3460 120 11.5 63
Show 18386+2422 POU3450 161 7.6 63
Show 18387+2422 POU3452 139 16.1 64
Show 18401+2351 POU3462 BC 171 10.8 65

 
 
WDS 18355+2336 : COMPONENTS
 
 
  A
B pa=4.8°
sep=0.79"
 
 
18355+2336 A
 
 
Componente originario normalizzato AB Name HD 171745 Coord arcsec 2000 183530.40+233619.9 Mag 6.35
Spectral class G9III (yellow) PmRA 5.00 PmDE 3.0 SAO 86224
HIP 91139 Tycho2 2107-00474-1 HD 171745 HR 6980
GC 25407 BD BD+23 3385
Tycho2
Tycho2 2107-00474-1 Pflag RAmdeg 278.87667351 DEmdeg 23.60561882
PmRA 5.2 PmDE 2.8 E RAmdeg 4 E DEmdeg 3
E pmRA 1.0 E pmDE 0.9 EpRAm 1991.20 EpDEm 1991.60
Num 13 Q RAmdeg 1.2 Q DEmdeg 0.7 Q pmRA 1.2
Q pmDE 0.8 BTmag 6.977 E BTmag 0.015 VTmag 5.803
E VTmag 0.009 Prox 999 TYC T HIP 91139
CCDM AB RAdeg 278.87666000 DEdeg 23.60561222 EpRA 1990 1.46
EpDE 1990 1.76 E RAdeg 3.5 E DEdeg 3.3 Posflg P
Corr 0.0
SAO
SAO 86224 DelFlag RA1950 PmRA1950 0.0002
DE1950 PmDE1950 0.006 Vmag 5.8 SpType K0
Double code Source 70 CatNum 25407 DM BD+23 3385
DMcomp BDsup HD 171745 M HD 0
GC 25407 RA1950rad 4.85822898 DE1950rad 0.41126707 PmRA2000 0.0003
PmDE2000 0.005
Hipparcos
Catalog H HIP 91139 Proxy H RAhms 18 35 30.39
DEdms +23 36 19.9 Vmag 5.62 VarFlag R Vmag H
RAdeg 278.877 DEdeg 23.6055 AstroRef A Plx 6.7
CCDM 18355+2336 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 8 Rho 0.684 HD 171745 BD BD+23 3385
CD CP Dm number +23 3385 VIred 0.99
SpType G8III R SpType Coord arcsec 2000 183530.39+233619.9
Hipparcos 2
HIP 91139 Sn 15 So 3 Nc 2
RArad 4.8673156653 DErad 0.411994189 Plx 6.93 PmRA 3.04
PmDE 0.56 E RArad 0.25 E DErad 0.63 E Plx 0.68
E pmRA 0.35 E pmDE 1 Hpmag 5.7882 E Hpmag 0.0006
SHp 0.007 VA 0 BV 1.015 E BV 0.004
VI 0.99
CCDM
Ccdm 18355+2336 RComp Comp A Note1
Note2 Discov num DRAs 0.40 DDEs 20.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 6.4 Sp K0 PmNote *
PmRA 4 PmDE 16 Dm number +23 3385 Cat1 BD
Name2 +23 1773 Cat2 AGK2/3 HD 171745 M HD
ADS BDS A11479 M ADS BDS N IDS IDS 18314N2331A
HIC 91139
 
 
18355+2336 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 183530.40+233620.7 Mag 6.62 PmRA 5.00
PmDE 3.0 Calc delta mag 0.27 Calc coord yes
CCDM
Ccdm 18355+2336 RComp Comp B Note1 *
Note2 Discov num STT 359 DRAs DDEs
R dRAs Year 1849 Theta Rho
Obs 99 Vmag 6.7 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11479 M ADS BDS N IDS IDS 18314N2331B
HIC 91139