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Doubles in session


Current system
18092-2211
RST 3157
HD 165893


Nearby doubles
11' : 18096-2220
DON 883

12' : 18091-2222
ARA1847

12' : 18098-2203
RST3158

16' : 18082-2216
BU 243AB

18' : 18100-2157
BRT1515

22' : 18105-2223
BRT1516

25' : 18075-2206
LYS 36

32' : 18114-2205
ARA1850

33' : 18071-2224
LYS 35AB

33' : 18116-2209
BRT1517

35' : 18079-2141
ARA1513

36' : 18068-2203
J 2907

36' : 18070-2153
ARA1511

36' : 18092-2247
HO 427

38' : 18068-2228
LYS 34

39' : 18065-2200
J 2906

40' : 18074-2240
J 3203

40' : 18120-2217
ARA1852

41' : 18084-2132
ARA1514

42' : 18069-2144
ARA1509

44' : 18120-2155
BRT1518

44' : 18061-2207
B 1877

44' : 18093-2255
VVV 3

45' : 18124-2207
ARA1853

46' : 18103-2254
ARA1848

47' : 18058-2212
ARA1844



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.

18092-2211 RST 3157 (HD 165893)

 
 
18h 09m 12.18s -22° 11' 00.6" P.A. 143.00 sep 0.1 mag 9.58,9.92 Sp K3/4V dist. 32.8 pc (106.99 l.y.)
 
 
Coord 2000 18092-2211 Discov num RST3157 Comp Coord arcsec 2000 18 09 12.18 -22 11 00.6
Date first 1935 Date last 2021 Obs 33
Pa first 109 Pa last 143.3 P.A. Now (θ) 206.7°
Sep first 0.2 Sep last 0.132 Sep. Now (ρ) 0.117"
Mag pri 9.58 Mag sec 9.92 delta mag (ΔM) 0.34 Spectral class K3/4V (yellow-orange)
Pri motion ra -015 Sec motion ra
Pri motion dec -085 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 165893 Constellation Sagittarius SAO 186363 HIP 88932
Tycho2 6276-00651-1 Gaia DR2 4069746980613766144 HD 165893 BD BD-22 4584
CD CD-2212617 CP CP-22 6736 Distance 32.8 Distance ly 106.99
 
 
ORBITAL ELEMENTS
 
 
Period (P)9.32y Periastron (T)2015.185y Semi-major axis (a)0.149a
Eccentricity (e)0.413 Inclination (i)48.1° Longitude of periastron (ω)238.6°
Node (Ω)63.1° Notes ReferenceTok2018e
Equinox2000 Last observation2018 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 89.5 0.179
2001 106.7 0.167
2002 128.2 0.145
2003 157.2 0.126
2004 193.0 0.118
2005 232.4 0.109
2006 307.6 0.062
2007 40.7 0.114
2008 67.3 0.165
2009 84.4 0.180
2010 100.9 0.172
2011 120.7 0.152
2012 147.0 0.131
2013 181.1 0.119
2014 219.1 0.114
2015 272.3 0.078
2016 24.3 0.089
2017 60.7 0.153
2018 79.2 0.178
2019 95.4 0.177
2020 113.8 0.159
2021 137.7 0.137
2022 169.6 0.121
2023 206.7 0.117
2024 250.2 0.096
2025 356.1 0.067
2026 52.7 0.137
2027 73.8 0.174
2028 90.2 0.179
2029 107.5 0.166
2030 129.2 0.144


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


 
  


wds18092-2211d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18092-2211 RST 3157 (HD 165893) : NOTES
 
 
discov_num notes refcode
RST3157 Poor fit for visual observations, speckle needed.
Soderhjelm notes poor Hipparcos solution. Sod1999
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 4.04 +/- 1.19, 1.48, and 0.73 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
Tok2018e orb - Tokovinin, A. 2018IAUDS.195....1T
Tok2018e Inf. Circ. 195, 1, 2018
 
 
DISCOVERER
 
 
idgroup discov author
1 RST Rossiter, R.A.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18092-2211 RST3157 1991 23 171 0.1 9.58 9.92 K3/4V NO 180912.18-221100.6
18092-2211 RST3157 2009 24 89 0.2 9.58 9.92 K3/4V NO 180912.18-221100.6
18092-2211 RST3157 2013 25 209 0.1 9.58 9.92 K3/4V NO 180912.18-221100.6
18092-2211 RST3157 2014 27 255 0.1 9.58 9.92 K3/4V NO 180912.18-221100.6
18092-2211 RST3157 2015 28 310 0.1 9.58 9.92 K3/4V NO 180912.18-221100.6
18092-2211 RST3157 2017 29 68 0.2 9.58 9.92 K3/4V NO 180912.18-221100.6
18092-2211 RST3157 2018 31 91 0.2 9.58 9.92 K3/4V NO 180912.18-221100.6
18092-2211 RST3157 2019 32 104 0.2 9.58 9.92 K3/4V NO 180912.18-221100.6
18092-2211 RST3157 2021 33 143 0.1 9.58 9.92 K3/4V NO 180912.18-221100.6

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

 
 
WDS 18092-2211 RST 3157 (HD 165893) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18092-2211 RST 3157 (HD 165893) : MEASURES
 
 
No records found.

 
 
WDS 18092-2211 (HD 165893) : VIRTUAL EYEPIECE
 
 

18092-2211 RST3157A mag 9.58 Sp K3/4V 18092-2211 RST3157B sep 0.1 P.A. 145.40 mag 9.92 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 18092-2211 (HD 165893) : ALADIN DSS IMAGE @ 18h 09m 12.18s -22° 11' 00.6"
 
 
 
 
WDS 18092-2211 RST 3157 (HD 165893) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18092-2211 RST3157 distance=0' 18096-2220 DON 883 distance=11' 18091-2222 ARA1847 distance=12' 18098-2203 RST3158 distance=12' 18082-2216 BU 243AB distance=16' 18082-2216 BU 243AB,C distance=16' 18100-2157 BRT1515 distance=18' 18105-2223 BRT1516 distance=22' 18075-2206 LYS 36 distance=25' 18114-2205 ARA1850 distance=32' 18071-2224 TDT 690Ba,Bb distance=32' 18071-2224 LYS 35AB distance=33' 18116-2209 BRT1517 distance=33' 18079-2141 ARA1513 distance=35' 18068-2203 J 2907 distance=36' 18070-2153 ARA1511 distance=36' 18092-2247 HO 427 distance=36' 18068-2228 LYS 34 distance=38' 18065-2200 J 2906 distance=39' 18074-2240 J 3203 distance=40' 18120-2217 ARA1852 distance=40' 18084-2132 ARA1514 distance=41' 18069-2144 ARA1509 distance=42' 18120-2155 BRT1518 distance=44' 18061-2207 B 1877 distance=44' 18093-2255 VVV 3 distance=44' 18124-2207 ARA1853 distance=45' 18103-2254 ARA1848 distance=46' 18058-2212 ARA1844 distance=47' 18062-2143 ARA1508 distance=50' 18060-2238 BRT1513 distance=53' 18130-2217 ARA1855 distance=53' 18057-2149 VVV 52 distance=54' 18079-2119 RST5101 distance=55' 18127-2239 ARA1854 distance=56' 18122-2130 ARA1518 distance=59' 18133-2158 ARA1857 distance=59' 18059-2134 ARA1507 distance=59' 18070-2121 ARA1510 distance=60' 18132-2230 ARA1856 distance=60' 18128-2135 ARA1520 distance=62' 18054-2140 TOK 365 distance=62' 18132-2144 I 631 distance=63' 18071-2115 ARA1512 distance=63' 18130-2134 ARA1521 distance=65' 18113-2111 ARA1516 distance=67' 18140-2208 ARA1858 distance=67' 18100-2105 TDT 719 distance=68' 18141-2201 BRT1520 distance=68' 18090-2319 RST5103 distance=69' 18076-2316 OCC 646 distance=70' 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 18092-2211 RST3157 143 0.1
Show 18096-2220 DON 883 31 0.6 11
Show 18091-2222 ARA1847 170 11.5 12
Show 18098-2203 RST3158 136 0.4 12
Show 18082-2216 BU 243 AB 126 0.7 16
Show 18082-2216 BU 243 AB,C 56 40.2 16
Show 18100-2157 BRT1515 37 4.1 18
Show 18105-2223 BRT1516 285 3.9 22
Show 18075-2206 LYS 36 22 20.6 25
Show 18114-2205 ARA1850 287 8.4 32
Show 18071-2224 TDT 690 Ba,Bb 68 0.5 32
Show 18071-2224 LYS 35 AB 80 18.6 33
Show 18116-2209 BRT1517 207 3.9 33
Show 18079-2141 ARA1513 213 6.1 35
Show 18068-2203 J 2907 177 7.2 36
Show 18070-2153 ARA1511 225 14.7 36
Show 18092-2247 HO 427 71 10.9 36
Show 18068-2228 LYS 34 114 5.7 38
Show 18065-2200 J 2906 356 8.6 39
Show 18074-2240 J 3203 92 3.8 40
Show 18120-2217 ARA1852 27 13.0 40
Show 18084-2132 ARA1514 186 14.5 41
Show 18069-2144 ARA1509 344 15.1 42
Show 18120-2155 BRT1518 258 5.2 44
Show 18061-2207 B 1877 230 0.5 44
Show 18093-2255 VVV 3 170 42.6 44
Show 18124-2207 ARA1853 114 11.4 45
Show 18103-2254 ARA1848 38 8.0 46
Show 18058-2212 ARA1844 137 13.0 47
Show 18062-2143 ARA1508 277 9.4 50
Show 18060-2238 BRT1513 56 4.4 53
Show 18130-2217 ARA1855 120 10.4 53
Show 18057-2149 VVV 52 46 8.7 54
Show 18079-2119 RST5101 191 0.7 55
Show 18127-2239 ARA1854 282 12.7 56
Show 18122-2130 ARA1518 112 13.2 59
Show 18133-2158 ARA1857 87 9.6 59
Show 18059-2134 ARA1507 213 6.6 59
Show 18070-2121 ARA1510 266 14.4 60
Show 18132-2230 ARA1856 125 11.1 60
Show 18128-2135 ARA1520 213 12.9 62
Show 18054-2140 TOK 365 293 6.6 62
Show 18132-2144 I 631 166 1.5 63
Show 18071-2115 ARA1512 281 14.9 63
Show 18130-2134 ARA1521 172 12.9 65
Show 18113-2111 ARA1516 274 13.4 67
Show 18140-2208 ARA1858 39 13.5 67
Show 18100-2105 TDT 719 300 2.7 68
Show 18141-2201 BRT1520 210 4.3 68
Show 18090-2319 RST5103 95 1.1 69
Show 18076-2316 OCC 646 -1 0.1 70

 
 
WDS 18092-2211 : COMPONENTS
 
 
  A
B pa=145.4°
sep=0.13"
 
 
18092-2211 A
 
 
Componente originario normalizzato AB Name HD 165893 Coord arcsec 2000 180912.18-221100.6 Mag 9.58
Spectral class K3/4V (yellow-orange) PmRA -15.00 PmDE -85.0 SAO 186363
HIP 88932 Tycho2 6276-00651-1 HD 165893 BD BD-22 4584
CD CD-2212617 CP CP-22 6736
Tycho2
Tycho2 6276-00651-1 Pflag RAmdeg 272.30070560 DEmdeg -22.18373969
PmRA -11.0 PmDE -91.8 E RAmdeg 12 E DEmdeg 15
E pmRA 1.7 E pmDE 1.9 EpRAm 1989.80 EpDEm 1989.77
Num 7 Q RAmdeg 0.7 Q DEmdeg 1.3 Q pmRA 0.6
Q pmDE 1.3 BTmag 10.236 E BTmag 0.035 VTmag 9.013
E VTmag 0.019 Prox 999 TYC T HIP 88932
CCDM AS RAdeg 272.30073222 DEdeg -22.18353028 EpRA 1990 1.75
EpDE 1990 1.77 E RAdeg 12.8 E DEdeg 15.7 Posflg P
Corr -0.2
SAO
SAO 186363 DelFlag RA1950 PmRA1950 -0.0014
DE1950 PmDE1950 -0.08 Vmag 8.7 SpType K2
Double code Source 25 CatNum 12516 DM CD-2212617
DMcomp BDsup HD 165893 M HD 0
GC RA1950rad 4.7393814 DE1950rad -0.38732088 PmRA2000 -0.0014
PmDE2000 -0.079
Hipparcos
Catalog H HIP 88932 Proxy H RAhms 18 09 12.18
DEdms -22 11 00.6 Vmag 8.88 VarFlag R Vmag G
RAdeg 272.301 DEdeg -22.1835 AstroRef * Plx 29.58
CCDM 18092-2211 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AS
Theta 171 Rho 0.138 HD 165893 BD BD-22 4584
CD CD-2212617 CP CP-22 6736 Dm number -22 4584 VIred 1.04
SpType K3/K4V R SpType Coord arcsec 2000 180912.18-221100.6
Hipparcos 2
HIP 88932 Sn 55 So 3 Nc 2
RArad 4.7525444473 DErad -0.3871753425 Plx 30.49 PmRA -9.42
PmDE -90.89 E RArad 1.06 E DErad 0.75 E Plx 1.2
E pmRA 1.48 E pmDE 1.05 Hpmag 8.9872 E Hpmag 0.0027
SHp 0.019 VA 0 BV 1.075 E BV 0.005
VI 1.04
CCDM
Ccdm 18092-2211 RComp Comp A Note1
Note2 Discov num DRAs 0.15 DDEs -0.7
R dRAs 41 Year Theta Rho
Obs 2 Vmag 9.7 Sp K2 PmNote *
PmRA -19 PmDE -80 Dm number -22 4584 Cat1 BD
Name2 186363 Cat2 SAO HD 165893 M HD
ADS BDS M ADS BDS N IDS IDS 18032S2212A
HIC 88932
 
 
18092-2211 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 180912.19-221100.7 Mag 9.92 Calc delta mag 0.34
Calc coord yes
CCDM
Ccdm 18092-2211 RComp Comp B Note1 *
Note2 Discov num RST3157 DRAs DDEs
R dRAs Year 1935 Theta Rho
Obs 14 Vmag 9.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 18032S2212B
HIC 88932