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Doubles in session


Current system
17156-3836
FIN 355
HD 155826


Nearby doubles
7' : 17158-3842
ALD 90

11' : 17164-3839
HJ 4928

17' : 17160-3819
RST1945

27' : 17139-3818
HWE 86

36' : 17185-3827
TDT 300

37' : 17185-3848
RST1947

40' : 17181-3810
SEE 324

43' : 17190-3849
HDS2447AB

43' : 17191-3849
WSI 60

51' : 17114-3825
HDS2427

52' : 17139-3748
B 902

55' : 17124-3915
SKF2060

56' : 17128-3751
TDT 264

59' : 17158-3934
RST1944

62' : 17137-3738
RST3969

62' : 17163-3937
RSS 434

64' : 17153-3939
I 229

68' : 17123-3930
TOK 607

71' : 17136-3729
TDS 858

72' : 17145-3946
HJ 4926AB

76' : 17128-3728
B 899

76' : 17095-3901
VVV 37

81' : 17189-3946
I 409

84' : 17208-3932
RST1951

85' : 17132-3955
RST1942

87' : 17132-3714
B 2827



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.

17156-3836 FIN 355 (HD 155826)

 
 
17h 15m 35.95s -38° 35' 38.0" P.A. 216.00 sep 0.3 mag 6.30,7.88 Sp F7V+G2V dist. 30.59 pc (99.78 l.y.)
 
 
Coord 2000 17156-3836 Discov num FIN 355 Comp Coord arcsec 2000 17 15 35.95 -38 35 38.0
Date first 1959 Date last 2021 Obs 19
Pa first 142 Pa last 215.9 P.A. Now (θ) 204.5°
Sep first 0.1 Sep last 0.281 Sep. Now (ρ) 0.323"
Mag pri 6.30 Mag sec 7.88 delta mag (ΔM) 1.58 Spectral class F7V+G2V (yellow-white/yellow)
Pri motion ra -174 Sec motion ra
Pri motion dec -412 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 155826 Constellation Scorpius SAO 208591 HIP 84425
Tycho2 7870-00136-1 HD 155826 HR 6398 GC 23270
CD CD-3811686 CP CP-38 6755 Distance 30.59 Distance ly 99.78
 
 
ORBITAL ELEMENTS
 
 
Period (P)14.23y± 0.03 Periastron (T)1985.97y± 0.06 Semi-major axis (a)0.249a± 0.002
Eccentricity (e)0.476± 0.01 Inclination (i)115.3°± 0.6 Longitude of periastron (ω)137.2°± 1
Node (Ω)191.9°± 0.6 Notesn ReferenceTok2015c
Equinox2000 Last observation2014 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 47.2 0.084
2001 5.4 0.149
2002 337.7 0.136
2003 299.4 0.118
2004 261.4 0.139
2005 238.2 0.185
2006 224.7 0.236
2007 215.8 0.279
2008 209.0 0.310
2009 203.2 0.325
2010 197.6 0.322
2011 191.5 0.293
2012 183.1 0.234
2013 165.5 0.138
2014 72.3 0.066
2015 11.7 0.143
2016 344.7 0.142
2017 309.1 0.119
2018 268.9 0.131
2019 242.4 0.174
2020 227.3 0.224
2021 217.6 0.270
2022 210.5 0.304
2023 204.5 0.323
2024 198.9 0.324
2025 193.0 0.302
2026 185.4 0.251
2027 171.5 0.163
2028 106.7 0.063
2029 18.8 0.131
2030 351.2 0.147


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


 
  


wds17156-3836c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 17156-3836 FIN 355 (HD 155826) : NOTES
 
 
discov_num notes refcode
FIN 355 Rapid motion.
New orbit based on few observations, mass-sum too small. Sod1999
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 2.29 +/- 0.17, 2.22, and 2.12 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
Sod1999 orb - Soderhjelm, S. 1999A&A...341..121S
Sod1999 A&A 341, 121, 1999
Tok2015c orb+j Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P. 2015AJ....150...50T
Tok2015c +St AJ 150, 50, 2015 (some measures corrected in Tok2017b) 2017AJ....154..110T
 
 
DISCOVERER
 
 
idgroup discov author
1 FIN Finsen, W.S.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17156-3836 FIN 355 1992 12 218 0.3 6.30 7.88 F7V+G2V NO 171536.08-383534.6
17156-3836 FIN 355 2009 13 21 0.3 6.30 7.88 F7V+G2V NO 171536.08-383534.6
17156-3836 FIN 355 2010 14 195 0.3 6.30 7.88 F7V+G2V NO 171536.08-383534.6
17156-3836 FIN 355 2014 13 44 0.1 6.30 7.88 F7V+G2V NO 171536.08-383534.6
17156-3836 FIN 355 2015 14 4 0.2 6.30 7.88 F7V+G2V NO 171536.08-383534.6
17156-3836 FIN 355 2017 16 297 0.1 6.30 7.88 F7V+G2V NO 171535.95-383538.0
17156-3836 FIN 355 2018 17 263 0.1 6.30 7.88 F7V+G2V NO 171535.95-383538.0
17156-3836 FIN 355 2019 18 237 0.2 6.30 7.88 F7V+G2V NO 171535.95-383538.0
17156-3836 FIN 355 2021 19 216 0.3 6.30 7.88 F7V+G2V NO 171535.95-383538.0

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

 
 
WDS 17156-3836 FIN 355 (HD 155826) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 17156-3836 FIN 355 (HD 155826) : MEASURES
 
 
No records found.

 
 
WDS 17156-3836 (HD 155826) : VIRTUAL EYEPIECE
 
 

17156-3836 FIN 355A mag 6.3 Sp F7V 17156-3836 FIN 355B sep 0.3 P.A. 209.50 mag 7.88 Sp G2V 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 17156-3836 (HD 155826) : ALADIN DSS IMAGE @ 17h 15m 35.95s -38° 35' 38.0"
 
 
 
 
WDS 17156-3836 FIN 355 (HD 155826) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

17156-3836 FIN 355 distance=1' 17158-3842 ALD 90 distance=7' 17164-3839 HJ 4928 distance=11' 17160-3819 RST1945 distance=17' 17139-3818 HWE 86 distance=27' 17185-3827 TDT 300 distance=36' 17185-3848 RST1947 distance=37' 17181-3810 SEE 324 distance=40' 17190-3849 HDS2447AB distance=43' 17190-3849 HDS2447BC distance=43' 17191-3849 WSI 60 distance=43' 17114-3825 HDS2427 distance=51' 17139-3748 B 902 distance=52' 17124-3915 SKF2060 distance=55' 17128-3751 TDT 264 distance=56' 17158-3934 RST1944 distance=59' 17137-3738 RST3969 distance=62' 17163-3937 RSS 434 distance=62' 17153-3939 I 229 distance=64' 17123-3930 TOK 607 distance=68' 17136-3729 TDS 858 distance=71' 17145-3946 HJ 4926AB distance=72' 17145-3946 HJ 4926AC distance=72' 17128-3728 B 899 distance=76' 17095-3901 VVV 37 distance=76' 17189-3946 I 409 distance=81' 17208-3932 RST1951 distance=84' 17132-3955 RST1942 distance=85' 17132-3714 B 2827 distance=87' 17227-3812 I 1317 distance=87' 17091-3753 B 896 distance=88' 17232-3821 RST1955 distance=91' 17151-4006 WG 201 distance=91' 17096-3738 TDT 238 distance=92' 17077-3849 I 1311 distance=94' 17084-3754 RST3070 distance=95' 17227-3748 B 908AB distance=96' 17227-3748 B 908AC distance=96' 17204-3954 WG 204 distance=97' 17241-3849 KPP4038 distance=100' 17228-3739 B 909 distance=102' 17094-3716 HDS2423 distance=109' 17131-3651 B 901 distance=109' 17080-3733 JSP 707 distance=111' 17062-3838 SEE 318 distance=111' 17244-3759 RST3092 distance=111' 17214-3707 BRT1714 distance=113' 17175-3645 TDT 297 distance=114' 17210-3701 B 906 distance=114' 17232-3946 WG 206AB distance=114' 17232-3946 SHT 31AC distance=114' 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 17156-3836 FIN 355 216 0.3 1
Show 17158-3842 ALD 90 150 1.3 7
Show 17164-3839 HJ 4928 300 13.8 11
Show 17160-3819 RST1945 345 14.5 17
Show 17139-3818 HWE 86 150 2.6 27
Show 17185-3827 TDT 300 159 0.8 36
Show 17185-3848 RST1947 231 0.2 37
Show 17181-3810 SEE 324 83 0.1 40
Show 17190-3849 HDS2447 AB 141 9.8 43
Show 17190-3849 HDS2447 BC 74 4.1 43
Show 17191-3849 WSI 60 334 1.4 43
Show 17114-3825 HDS2427 294 18.0 51
Show 17139-3748 B 902 71 1.6 52
Show 17124-3915 SKF2060 147 19.2 55
Show 17128-3751 TDT 264 205 1.0 56
Show 17158-3934 RST1944 261 2.2 59
Show 17137-3738 RST3969 292 0.2 62
Show 17163-3937 RSS 434 38 9.9 62
Show 17153-3939 I 229 233 5.0 64
Show 17123-3930 TOK 607 322 882.6 68
Show 17136-3729 TDS 858 70 1.4 71
Show 17145-3946 HJ 4926 AB 335 13.8 72
Show 17145-3946 HJ 4926 AC 209 16.4 72
Show 17128-3728 B 899 330 1.8 76
Show 17095-3901 VVV 37 37 2.1 76
Show 17189-3946 I 409 35 5.4 81
Show 17208-3932 RST1951 81 0.9 84
Show 17132-3955 RST1942 155 1.4 85
Show 17132-3714 B 2827 150 4.5 87
Show 17227-3812 I 1317 247 0.3 87
Show 17091-3753 B 896 87 4.7 88
Show 17232-3821 RST1955 51 0.4 91
Show 17151-4006 WG 201 91 5.7 91
Show 17096-3738 TDT 238 144 1.4 92
Show 17077-3849 I 1311 86 3.8 94
Show 17084-3754 RST3070 172 0.4 95
Show 17227-3748 B 908 AB 115 2.7 96
Show 17227-3748 B 908 AC 208 9.7 96
Show 17204-3954 WG 204 167 4.8 97
Show 17241-3849 KPP4038 42 1.6 100
Show 17228-3739 B 909 72 2.9 102
Show 17094-3716 HDS2423 151 0.2 109
Show 17131-3651 B 901 297 2.9 109
Show 17080-3733 JSP 707 317 0.8 111
Show 17062-3838 SEE 318 356 1.1 111
Show 17244-3759 RST3092 64 0.3 111
Show 17214-3707 BRT1714 9 1.7 113
Show 17175-3645 TDT 297 292 0.5 114
Show 17210-3701 B 906 335 0.4 114
Show 17232-3946 WG 206 AB 147 4.8 114
Show 17232-3946 SHT 31 AC 265 13.1 114

 
 
WDS 17156-3836 : COMPONENTS
 
 
  A
B pa=209.5°
sep=0.26"
 
 
17156-3836 A
 
 
Componente originario normalizzato AB Name HD 155826 Coord arcsec 2000 171535.95-383538.0 Mag 6.3
Spectral class F7V (yellow-white) PmRA -174.00 PmDE -412.0 SAO 208591
HIP 84425 Tycho2 7870-00136-1 HD 155826 HR 6398
GC 23270 CD CD-3811686 CP CP-38 6755
Tycho2
Tycho2 7870-00136-1 Pflag RAmdeg 258.89978410 DEmdeg -38.59394682
PmRA -173.8 PmDE -410.6 E RAmdeg 4 E DEmdeg 4
E pmRA 1.3 E pmDE 1.3 EpRAm 1991.42 EpDEm 1991.08
Num 14 Q RAmdeg 1.5 Q DEmdeg 1.2 Q pmRA 1.6
Q pmDE 1.2 BTmag 6.648 E BTmag 0.014 VTmag 6.021
E VTmag 0.009 Prox 999 TYC T HIP 84425
CCDM AB RAdeg 258.90029528 DEdeg -38.59296028 EpRA 1990 1.73
EpDE 1990 1.35 E RAdeg 3.5 E DEdeg 3.9 Posflg P
Corr 0.1
SAO
SAO 208591 DelFlag RA1950 PmRA1950 -0.0157
DE1950 PmDE1950 -0.412 Vmag 6.1 SpType F8
Double code Source 70 CatNum 23270 DM CD-3811686
DMcomp BDsup HD 155826 M HD 0
GC 23270 RA1950rad 4.50372627 DE1950rad -0.67252135 PmRA2000 -0.0155
PmDE2000 -0.412
Hipparcos
Catalog H HIP 84425 Proxy H RAhms 17 15 36.08
DEdms -38 35 34.6 Vmag 5.95 VarFlag R Vmag G
RAdeg 258.9 DEdeg -38.593 AstroRef * Plx 32.6
CCDM 17156-3836 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 236 Rho 0.216 HD 155826 BD
CD CD-3811686 CP CP-38 6755 Dm number -3811686 VIred 0.64
SpType G0V R SpType Coord arcsec 2000 171536.08-383534.6
Hipparcos 2
HIP 84425 Sn 55 So 3 Nc 2
RArad 4.5186630899 DErad -0.67357407 Plx 32.69 PmRA -171.98
PmDE -391.07 E RArad 0.51 E DErad 0.29 E Plx 0.59
E pmRA 0.6 E pmDE 0.31 Hpmag 6.0707 E Hpmag 0.0008
SHp 0.006 VA 0 BV 0.58 E BV 0.004
VI 0.64
CCDM
Ccdm 17156-3836 RComp Comp A Note1
Note2 Discov num DRAs -0.06 DDEs 22.2
R dRAs 10 Year Theta Rho
Obs 2 Vmag 6.7 Sp F8 PmNote *
PmRA -177 PmDE -407 Dm number -3811686 Cat1 CD
Name2 208591 Cat2 SAO HD 155826 M HD
ADS BDS M ADS BDS N IDS IDS 17088S3828A
HIC 84425
 
 
17156-3836 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 171535.94-383538.2 Mag 7.88 Spectral class G2V (yellow)
Calc delta mag 1.58 Calc coord yes
CCDM
Ccdm 17156-3836 RComp Comp B Note1
Note2 Discov num FIN 355 DRAs DDEs
R dRAs Year 1959 Theta 142 Rho 0.1
Obs 1 Vmag 6.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 17088S3828B
HIC 84425