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Doubles in session


Current system
18428+5938
STF 2398 BC


Nearby doubles
26' : 18401+5922
UC 3633

28' : 18449+5916
UC 3661

28' : 18459+5924
MLB1079AB

29' : 18437+6005
STI 859

31' : 18392+5925
TDT 975

37' : 18469+5920
STF2410

50' : 18414+5849
STI2381

58' : 18432+5840
TDT1017

61' : 18348+5944
TDS 930

62' : 18439+6039
ES 189AB

64' : 18355+6010
STI 854

66' : 18512+5923
STF2420AB

67' : 18459+6040
TDT1041

70' : 18416+6047
STI 857

70' : 18519+5948
STI 865

72' : 18520+5951
STI 866

73' : 18384+6043
HJ 2836AB

74' : 18524+5938
STI 867

74' : 18417+6051
STI 858

78' : 18483+6044
LDS2751

80' : 18337+6019
FOX 83

83' : 18478+5826
STI2387

86' : 18399+5815
A 251AB

87' : 18443+6103
STF2403

87' : 18537+6005
TDT1117

89' : 18334+5846
STF2353



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.

18428+5938 STF 2398 BC

 
 
18h 42m 46.90s +59° 37' 36.6" P.A. 157.00 sep 202.7 mag 9.96,12.24 Sp M3.5V dist. 3.45 pc (11.25 l.y.)
 
 
Coord 2000 18428+5938 Discov num STF2398 Comp BC Coord arcsec 2000 18 42 46.90 +59 37 36.6
Date first 1904 Date last 2000 Obs 18
Pa first 261 Pa last 157.1 P.A. Now (θ) 157.1°
Sep first 54.2 Sep last 202.72 Sep. Now (ρ) 202.72"
Mag pri 9.96 Mag sec 12.24 delta mag (ΔM) 2.28 Spectral class M3.5V (red)
Pri motion ra -139 Sec motion ra -001
Pri motion dec +185 Sec motion dec -001
Notes N L P (See Notes, Linear solution, 100-year proper motion)
rPM=1.001
This double is not physical.
 
 
18428+5938 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 173739 31128 18 42 47 +59 37 49 STF 2398 AB 2020 641 181 11.4 9.11 9.96 0.85 Y
Show 31128 18 42 47 +59 37 49 STF 2398 AC 2013 21 158 216.8 9.11 12.24 3.13
Show 31128 18 42 47 +59 37 49 POP 1224 AD 2008 3 110 100.0 9.11 13.50 4.39
Show 31129 18 42 47 +59 37 37 STF 2398 BC 2000 18 157 202.7 9.96 12.24 2.28 <===
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Draco SAO 31129 HIP 91772 Tycho2 3930-01791-2
HD 173740 GC 25649 GL Gl 725B DM BD+59 1915
Distance 3.45 Distance ly 11.25
 
 
WDS 18428+5938 STF 2398 BC : NOTES
 
 
discov_num notes refcode
STF2398 AB: Mt. Wilson spectral classes M4 and M4. Proper motion -1298 +1879.
B is variable. Also known as LDS1466.
CHARA Array Limb-darkened diameter of A,B: CIA2012f
R = 0.3561 +/- 0.0039, 0.3232 +/- 0.0061 \rsun,
L = 0.01531 +/- 0.00018, 0.00871 +/- 0.00012 \lsun,
Teff = 3407 +/- 15, 3104 +/- 28 K, M = 0.318, 0.235 \msun.
Optical pair. Doo1901
Statistically the same parallax within the errors would indicate the
components are physical.
Parabolic orbit by Wieth-Knudsen (1953). Wie1953b
sigma = areal constant in the true orbit = 2.207 arcsec^2/yr
q = periastron distance in the true orbit = 16".603
A short-period motion in one of the components has been suspected
repeatedly, but photographic measures do not show it. (Heintz 1978) Hei1978d
See Baize & Petit (1989) catalog of doubles with variable component. Baz1989d
AC: Same as ADS 11632 AB.
BC: Rectilinear solution by Friedman et al. (2012). USN2012a
 
 
REFERENCES
 
 
refcode metd author reference
Baz1989d - Baize, P. & Petit, M. 1989A&AS...77..497B
Baz1989d A&AS 77, 497, 1989
CIA2012f not j Boyajian, T.S., von Braun, K., van Belle, G., McAlister, H.A., ten Brummelaar, 2012ApJ...757..112B
CIA2012f T.A., Kane, S.R., Muirhead, P.S., Jones, J., White, R., Schaefer, G., Ciardi, D., .
CIA2012f Henry, T., Lopez-Morales, M., Ridgway, S., Gies, D., Jao, W.-C., Rojas-Ayala, B., .
CIA2012f Parks, J.R., Sturmann, L., Sturmann, J., Turner, N.H., Farrington, C., Goldfinger, .
CIA2012f P.J. & Berger, D.H.
CIA2012f ApJ 757, 112, 2012 .
Doo1901 Ma j Doolittle, E. 1901PFAO....1c...1D
Doo1901 Pub. Univ. Penn. 1, Pt. 3, 1901
Hei1978d - Heintz, W.D. 1978ApJ...220..931H
Hei1978d ApJ 220, 931, 1978
USN2012a lin - Friedman, E.A., Mason, B.D., & Hartkopf, W.I. 2012IAUDS.176....1F
USN2012a Inf. Circ. 176, 1, 2012
Wie1953b orb - Wieth-Knudsen, N. 1953QB821.W57......
Wie1953b Ann. Obs. Lund 12, A18, 1953
 
 
DISCOVERER
 
 
idgroup discov author
1 POP Popovic, G.M.
130 POP Popovic, G.M. (Cvetkovic, Z., Pavlovic, R., Strigachev, A., Novakovic, B., &
130 POP Popovic, G.M.)
131 STF Struve, F.G.W.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18428+5938 STF2398 BC 2000 18 157 202.7 9.80 12.80 N D 184246.88+593737.4

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

 
 
WDS 18428+5938 STF 2398 BC : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18428+5938 STF 2398 BC : MEASURES
 
 
No records found.

 
 
WDS 18428+5938 : VIRTUAL EYEPIECE
 
 

18428+5938 STF2398A mag 9.11 Sp M3V 18428+5938 STF2398B sep 12.9 P.A. 172.90 mag 9.96 Sp M3.5V 18428+5938 STF2398C sep 205.1 P.A. 168.40 mag 12.24 18428+5938 POP1224D sep 58.5 P.A. 125.80 mag 13.5 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 18428+5938 : ALADIN DSS IMAGE @ 18h 42m 46.90s +59° 37' 36.6"
 
 
 
 
WDS 18428+5938 STF 2398 BC : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18428+5938 STF2398BC distance=0' 18428+5938 STF2398AB distance=1' 18428+5938 POP1224AD distance=1' 18428+5938 STF2398AC distance=1' 18401+5922 UC 3633 distance=26' 18449+5916 UC 3661 distance=28' 18459+5924 MLB1079AB distance=28' 18459+5924 MLB1079BC distance=28' 18437+6005 STI 859 distance=29' 18392+5925 TDT 975 distance=31' 18469+5920 STF2410 distance=37' 18414+5849 STI2381 distance=50' 18432+5840 TDT1017 distance=58' 18348+5944 TDS 930 distance=61' 18439+6039 ES 189AB distance=62' 18355+6010 STI 854 distance=64' 18512+5923 STF2420BC distance=66' 18512+5923 STF2420AB distance=66' 18512+5923 STF2420AC distance=66' 18512+5923 CIA 8Aa,Ab distance=66' 18459+6040 TDT1041 distance=67' 18416+6047 STI 857 distance=70' 18519+5948 STI 865 distance=70' 18520+5951 STI 866 distance=72' 18384+6043 HJ 2836AB distance=73' 18384+6043 HJ 2836AC distance=73' 18384+6043 SLE 235AD distance=73' 18524+5938 STI 867 distance=74' 18417+6051 STI 858 distance=74' 18483+6044 LDS2751 distance=78' 18337+6019 FOX 83 distance=80' 18478+5826 STI2387 distance=83' 18399+5815 A 251AB distance=86' 18399+5815 A 251AC distance=86' 18443+6103 STF2403 distance=87' 18537+6005 TDT1117 distance=87' 18334+5846 STF2353 distance=89' 18545+5946 TOI1307 distance=90' 18334+5842 ES 188 distance=91' 18420+6109 LDS2747 distance=92' 18329+5846 STI2376 distance=93' 18347+5828 MLR 358 distance=94' 18527+5842 HDS2678 distance=95' 18361+6100 LDS2417 distance=98' 18299+5954 STI 849 distance=99' 18449+5759 STI2385 distance=101' 18494+5811 STI2392 distance=101' 18480+6113 LDS2750 distance=102' 18338+5823 LDS2416 distance=103' 18291+5920 LDS2413 distance=106' 18406+6123 ES 1838 distance=106' 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 18428+5938 STF2398 BC 157 202.7
Show 18428+5938 STF2398 AB 181 11.4 1
Show 18428+5938 POP1224 AD 110 100.0 1
Show 18428+5938 STF2398 AC 158 216.8 1
Show 18401+5922 UC 3633 276 49.7 26
Show 18449+5916 UC 3661 240 24.1 28
Show 18459+5924 MLB1079 AB 203 34.1 28
Show 18459+5924 MLB1079 BC 279 7.4 28
Show 18437+6005 STI 859 165 11.9 29
Show 18392+5925 TDT 975 42 0.6 31
Show 18469+5920 STF2410 85 1.7 37
Show 18414+5849 STI2381 139 8.7 50
Show 18432+5840 TDT1017 223 0.5 58
Show 18348+5944 TDS 930 38 1.1 61
Show 18439+6039 ES 189 AB 107 3.3 62
Show 18355+6010 STI 854 230 10.5 64
Show 18512+5923 STF2420 BC 326 103.5 66
Show 18512+5923 STF2420 AB 316 37.6 66
Show 18512+5923 STF2420 AC 324 141.3 66
Show 18512+5923 CIA 8 Aa,Ab 202 0.0 66
Show 18459+6040 TDT1041 7 2.5 67
Show 18416+6047 STI 857 176 4.5 70
Show 18519+5948 STI 865 179 3.7 70
Show 18520+5951 STI 866 274 3.8 72
Show 18384+6043 HJ 2836 AB 316 32.3 73
Show 18384+6043 HJ 2836 AC 252 56.4 73
Show 18384+6043 SLE 235 AD 313 154.7 73
Show 18524+5938 STI 867 220 6.1 74
Show 18417+6051 STI 858 10 4.2 74
Show 18483+6044 LDS2751 152 7.6 78
Show 18337+6019 FOX 83 28 0.7 80
Show 18478+5826 STI2387 84 12.4 83
Show 18399+5815 A 251 AB 53 4.0 86
Show 18399+5815 A 251 AC 78 13.5 86
Show 18443+6103 STF2403 278 1.1 87
Show 18537+6005 TDT1117 44 2.0 87
Show 18334+5846 STF2353 257 13.6 89
Show 18545+5946 TOI1307 35 0.3 90
Show 18334+5842 ES 188 219 11.6 91
Show 18420+6109 LDS2747 68 4.0 92
Show 18329+5846 STI2376 54 13.7 93
Show 18347+5828 MLR 358 161 1.4 94
Show 18527+5842 HDS2678 214 0.7 95
Show 18361+6100 LDS2417 185 66.9 98
Show 18299+5954 STI 849 352 13.6 99
Show 18449+5759 STI2385 143 12.4 101
Show 18494+5811 STI2392 142 5.3 101
Show 18480+6113 LDS2750 136 2.2 102
Show 18338+5823 LDS2416 94 13.3 103
Show 18291+5920 LDS2413 133 10.7 106
Show 18406+6123 ES 1838 153 7.0 106

 
 
WDS 18428+5938 : COMPONENTS
 
 
  A B C
B pa=172.9°
sep=12.90"
 
C pa=168.4°
sep=205.09"
pa=168.1°
sep=192.23"
 
D pa=125.8°
sep=58.54"
pa=115.0°
sep=50.67"
pa=2.2°
sep=166.81"
 
 
18428+5938 A
 
 
Name HD 173739 Coord arcsec 2000 184246.69+593749.4 Mag 9.11 Spectral class M3V (red)
PmRA -133.00 PmDE 180.0 SAO 31128 HIP 91768
Tycho2 3930-01791-1 HD 173739 GC 25648 BD BD+59 1915
Tycho2
Tycho2 3930-01791-1 Pflag X RAmdeg DEmdeg
PmRA PmDE E RAmdeg E DEmdeg
E pmRA E pmDE EpRAm EpDEm
Num Q RAmdeg Q DEmdeg Q pmRA
Q pmDE BTmag 10.897 E BTmag 0.048 VTmag 9.109
E VTmag 0.018 Prox 134 TYC T HIP 91768
CCDM A RAdeg 280.70069389 DEdeg 59.62615083 EpRA 1990 1.54
EpDE 1990 1.52 E RAdeg 14.2 E DEdeg 13.5 Posflg
Corr 0.0
SAO
SAO 31128 DelFlag RA1950 PmRA1950 -0.1751
DE1950 PmDE1950 1.869 Vmag 9.3 SpType K5
Double code Source 70 CatNum 25648 DM BD+59 1915
DMcomp A BDsup HD 173739 M HD 0
GC 25648 RA1950rad 4.89653224 DE1950rad 1.03941897 PmRA2000 -0.1772
PmDE2000 1.855
Hipparcos
Catalog H HIP 91768 Proxy RAhms 18 42 48.22
DEdms +59 37 33.7 Vmag 8.94 VarFlag R Vmag G
RAdeg 280.701 DEdeg 59.626 AstroRef A Plx 280.28
CCDM 18428+5937 N CCDM I Nsys 2 Ncomp 1
MultFlag C Source P Qual A M HIP
Theta Rho HD 173739 BD BD+59 1915
CD CP Dm number +59 1915 VIred 2.1
SpType K5 R SpType Coord arcsec 2000 184248.22+593733.7
Hipparcos 2
HIP 91768 Sn 95 So 3 Nc 1
RArad 4.8991549358 DErad 1.0406702983 Plx 280.18 PmRA -1332.03
PmDE 1807.48 E RArad 2.08 E DErad 1.97 E Plx 2.18
E pmRA 2.23 E pmDE 2.75 Hpmag 8.9218 E Hpmag 0.0212
SHp 0.12 VA 0 BV 1.504 E BV 0.008
VI 2.1
 
 
18428+5938 B
 
 
Coord arcsec 2000 184246.90+593736.6 Coord calc 184246.90+593736.6 Mag 9.96 Spectral class M3.5V (red)
PmRA -139.00 PmDE 185.0 SAO 31129 HIP 91772
Tycho2 3930-01791-2 HD 173740 GC 25649 DM BD+59 1915
Calc delta mag 0.85
Tycho2
Tycho2 3930-01791-2 Pflag X RAmdeg DEmdeg
PmRA PmDE E RAmdeg E DEmdeg
E pmRA E pmDE EpRAm EpDEm
Num Q RAmdeg Q DEmdeg Q pmRA
Q pmDE BTmag 11.809 E BTmag 0.090 VTmag 9.964
E VTmag 0.032 Prox 134 TYC T HIP 91772
CCDM B RAdeg 280.70186583 DEdeg 59.62248833 EpRA 1990 1.58
EpDE 1990 1.48 E RAdeg 27.2 E DEdeg 29.0 Posflg
Corr 0.0
SAO
SAO 31129 DelFlag RA1950 PmRA1950 -0.1794
DE1950 PmDE1950 1.818 Vmag 9.8 SpType K5
Double code Source 70 CatNum 25649 DM BD+59 1915
DMcomp B BDsup HD 173740 M HD 0
GC 25649 RA1950rad 4.89658561 DE1950rad 1.03933661 PmRA2000 -0.1815
PmDE2000 1.804
Hipparcos
Catalog H HIP 91772 Proxy RAhms 18 42 48.51
DEdms +59 37 20.5 Vmag 9.7 VarFlag R Vmag G
RAdeg 280.702 DEdeg 59.6224 AstroRef B Plx 284.48
CCDM 18428+5937 N CCDM I Nsys 2 Ncomp 1
MultFlag C Source I Qual A M HIP
Theta Rho HD 173740 BD
CD CP Dm number VIred 2.49
SpType K5 R SpType Coord arcsec 2000 184248.51+593720.5
Hipparcos 2
HIP 91772 Sn 95 So 3 Nc 1
RArad 4.8991763639 DErad 1.0406065959 Plx 289.48 PmRA -1338.68
PmDE 1809.15 E RArad 3.16 E DErad 3.04 E Plx 3.21
E pmRA 3.29 E pmDE 4.06 Hpmag 9.9964 E Hpmag 0.0474
SHp 0 VA 0 BV 1.561 E BV 0.005
VI 2.49
 
 
18428+5938 C
 
 
Coord arcsec 2000 184252.13+593428.5 Mag 12.24 PmRA -1.00 PmDE -1.0
Calc delta mag 3.13 Calc coord yes
 
 
18428+5938 D
 
 
Coord arcsec 2000 184252.95+593715.2 Mag 13.5 PmRA -1.00 PmDE -1.0
Calc delta mag 4.39 Calc coord yes