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Doubles in session


Current system
18309+3840
STF 2338 AB


Nearby doubles
11' : 18316+3846
COU1604

18' : 18310+3857
SLE 187AB

26' : 18329+3850
STTA171AB

39' : 18298+3803
HU 1189

41' : 18343+3832
SLE 210

43' : 18272+3847
MLB 854

52' : 18297+3929
TDT 910

53' : 18298+3930
SLE 182

55' : 18301+3746
UC 3595

57' : 18323+3933
UC 3603

63' : 18335+3934
SLE 208AB

65' : 18362+3858
ES 2571

66' : 18367+3911
OL 14AB

68' : 18367+3841
H 4 59AB

70' : 18366+3859
MLB 755

71' : 18369+3846
H 5 39AB
Vega

75' : 18348+3939
SLE 215

78' : 18273+3944
TDT 881

79' : 18334+3727
ES 2481

81' : 18337+3726
MLB 937

82' : 18240+3844
HO 432AB

84' : 18239+3824
HEI 803

86' : 18376+3806
ES 2019AB

87' : 18237+3821
HO 431

89' : 18385+3837
SLE 230AB

91' : 18256+3945
COU1461



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.

18309+3840 STF 2338 AB

 
 
18h 30m 54.75s +38° 39' 33.8" P.A. 301.00 sep 12.1 mag 9.30,11.20 Sp K2
 
 
Coord 2000 18309+3840 Discov num STF2338 Comp AB Coord arcsec 2000 18 30 54.75 +38 39 33.8
Date first 1828 Date last 2017 Obs 26
Pa first 302 Pa last 300.6 P.A. Now (θ) 300.6°
Sep first 10.0 Sep last 12.1 Sep. Now (ρ) 12.1"
Mag pri 9.30 Mag sec 11.20 delta mag (ΔM) 1.9 Spectral class K2 (yellow-orange)
Pri motion ra -011 Sec motion ra +000
Pri motion dec -007 Sec motion dec -009
Notes N (See Notes)
rPM=0.857
This double is not physical.
 
 
18309+3840 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 18 30 55 +38 39 34 STF 2338 AB 2017 26 301 12.1 9.30 11.20 1.90 <===
Show 18 30 55 +38 39 34 STF 2338 AC 2017 24 206 76.4 9.30 9.62 0.32
Show 18 30 55 +38 39 34 STF 2338 AE 2017 13 154 51.7 9.30 13.00 3.70
Show 18 30 52 +38 38 25 STF 2338 CD 2017 6 243 13.0 9.62 14.80 5.18
Show 18 30 52 +38 38 25 STF 2338 CE 2017 11 69 60.7 9.62 13.00 3.38
Quintuple system
5 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Lyra Tycho2 3105-00683-1 Gaia DR2 2108423433003279360
 
 
WDS 18309+3840 STF 2338 AB : NOTES
 
 
discov_num notes refcode
STF2338 C is the semiregular variable KP Lyr.
 
 
REFERENCES
 
 
refcode metd author reference
STFA (F. Struve DD - Appendix list #1) ...................
STFB (F. Struve DD - Appendix list #2) ...................
StF1833A Ma - Struve, F.G.W. 1833MmRAS...5...13H
StF1833A +Mc cited by Herschel (MemRAS 5, 13, 1833)
StF1833B Ma - Struve, F.G.W. 1833AN.....10..389B
StF1833B cited by Bessel (AN 10, 389, 1833)
StF1837 Ma - Struve, F.G.W. 1837AN.....14...249
StF1837 Stellarum duplicium et multiplicium mensurae micrometricae...
StF1837 (Dorpat, Academiae scientiarum caesareae petropolitaneifique), 1837
StF1844A Ma - Struve, F.G.W. 1844QB43.S66.......
StF1844A cited by Smyth (Cycle of Celestial Objects 2, 1844)
StF1852A Ma - Struve, F.G.W. .
StF1852A cited by Bishop (Bishop Obs. Astron. Observations 1852)
StF1865A Ma - Struve, F.G.W. 1865AN.....64...81E
StF1865A cited by Engelmann (AN 64, 81, #1518, 1865)
StF1875A Ma - Struve, F.G.W. 1875AN.....85..323D
StF1875A cited by Doberck, 1875 (see Dob1875b,f,g,h)
StF1878 Ma - Struve, F.G.W. .
StF1878 Pulkova Observations 9, 1878
StF1878B Ma - Struve, F.G.W. 1878Obs.....2..239G
StF1878B cited by Gledhill (Obs 2, 239, 1878)
StF1880A Ma - Struve, F.G.W. 1880Obs.....3..535G
StF1880A cited by Gledhill (Obs 3, 535, 1880)
StF1906A Ma - Struve, F.G.W. 1906QB821.B972.....
StF1906A cited in BDS (Burnham Double Star Cat.), 1906
StF1906B Ma - Struve, F.G.W. 1906MmRAS..56....1L
StF1906B cited by Lewis (MemRAS 56, 1, 1906)
StF1922A Ma - Struve, F.G.W. 1922AN....216...49R
StF1922A cited by Rabe (AN 216, 49, 1922)
StF1932A Ma - Struve, F.G.W. 1932QB821.A43......
StF1932A cited in ADS (Aitken Double Star Cat.), 1932
StF2002 - - Weis, J.
StF2002 F. G. W. Struve's double stars : the Dorpat catalogue; the Pulkovo catalogue
StF2002 USNO Library : QB 821 .S8 W49 2002
StF2022 - - email note from Jan Weis: 6 July 2022
StF9999 Ma - Struve, F.G.W. ...................
StF9999 Unpublished, manuscript or reference not found.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18309+3840 STF2338 AB 2006 16 301 12.2 9.90 11.20 K2 N D 183054.75+383933.8
18309+3840 STF2338 AB 2012 19 300 12.2 9.30 11.20 K2 N D 183054.75+383933.8
18309+3840 STF2338 AB 2013 20 300 12.1 9.30 11.20 K2 N D 183054.75+383933.8
18309+3840 STF2338 AB 2015 21 301 12.1 9.30 11.20 K2 N 183054.75+383933.8
18309+3840 STF2338 AB 2017 22 301 12.1 9.30 11.20 K2 N 183054.75+383933.8

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

 
 
WDS 18309+3840 STF 2338 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18309+3840 STF 2338 AB : MEASURES
 
 
No records found.

 
 
WDS 18309+3840 : VIRTUAL EYEPIECE
 
 

18309+3840 STF2338A mag 9.3 Sp K2 18309+3840 STF2338B sep 10.2 P.A. 307.10 mag 11.2 18309+3840 STF2338C sep 76.6 P.A. 206.50 mag 9.62 Sp Ma 18309+3840 STF2338D sep 86.0 P.A. 210.20 mag 14.8 18309+3840 STF2338E sep 49.7 P.A. 159.10 mag 13 Sp V 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 18309+3840 : ALADIN DSS IMAGE @ 18h 30m 54.75s +38° 39' 33.8"
 
 
 
 
WDS 18309+3840 STF 2338 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18309+3840 STF2338AB distance=0' 18309+3840 STF2338CD distance=2' 18309+3840 STF2338CE distance=2' 18316+3846 COU1604 distance=11' 18310+3857 FYM 40BE distance=18' 18310+3857 TDT 922Aa,Ab distance=18' 18310+3857 SLE 187AB distance=18' 18310+3857 FYM 40AC distance=18' 18310+3857 FYM 40AD distance=18' 18310+3857 FYM 40AE distance=18' 18329+3850 FYM 41BN distance=25' 18329+3850 STTA171AB distance=26' 18329+3850 SLE 200AC distance=26' 18329+3850 SLE 200AD distance=26' 18329+3850 SLE 200AE distance=26' 18329+3850 SLE 200AF distance=26' 18329+3850 STTA171AG distance=26' 18329+3850 FYM 41AH distance=26' 18329+3850 FYM 41AI distance=26' 18329+3850 FYM 41AJ distance=26' 18329+3850 FYM 41AK distance=26' 18329+3850 FYM 41AL distance=26' 18329+3850 FYM 41AM distance=26' 18298+3803 HU 1189 distance=39' 18343+3832 SLE 210 distance=41' 18272+3847 MLB 854 distance=43' 18297+3929 TDT 910 distance=52' 18298+3930 SLE 182 distance=53' 18301+3746 UC 3595 distance=55' 18323+3933 UC 3603 distance=57' 18335+3934 SLE 208AB distance=63' 18335+3934 SLE 208A,CD distance=63' 18335+3934 COU1606CD distance=64' 18362+3858 ES 2571 distance=65' 18367+3911 OL 14AB distance=66' 18367+3911 DAM 678AB,C distance=66' 18367+3841 FYM 506BC distance=68' 18367+3841 H 4 59AB distance=68' 18366+3859 MLB 755 distance=70' 18369+3846 STFB 9CD distance=70' 18369+3846 STF3136BC distance=71' 18369+3846 H 5 39AB (Vega) distance=71' 18369+3846 STFB 9AC (Vega) distance=71' 18369+3846 STFB 9AE (Vega) distance=71' 18369+3846 MET 11AF (Vega) distance=71' 18369+3846 MET 11AG (Vega) distance=71' 18369+3846 MET 11AH (Vega) distance=71' 18369+3846 MET 11A,Ia (Vega) distance=71' 18369+3846 MET 11A,Ib (Vega) distance=71' 18369+3846 MET 11AJ (Vega) distance=71' 18369+3846 MET 11A,Ka (Vega) distance=71' 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 18309+3840 STF2338 AB 301 12.1
Show 18309+3840 STF2338 AC 206 76.4
Show 18309+3840 STF2338 AE 154 51.7
Show 18309+3840 STF2338 CD 243 13.0 2
Show 18309+3840 STF2338 CE 69 60.7 2
Show 18316+3846 COU1604 130 1.8 11
Show 18310+3857 FYM 40 BE 210 11.3 18
Show 18310+3857 TDT 922 Aa,Ab 15 0.5 18
Show 18310+3857 SLE 187 AB 210 23.6 18
Show 18310+3857 FYM 40 AC 85 71.0 18
Show 18310+3857 FYM 40 AD 294 13.5 18
Show 18310+3857 FYM 40 AE 210 34.9 18
Show 18329+3850 FYM 41 BN 87 41.9 25
Show 18329+3850 STTA171 AB 328 150.1 26
Show 18329+3850 SLE 200 AC 226 68.9 26
Show 18329+3850 SLE 200 AD 248 93.6 26
Show 18329+3850 SLE 200 AE 228 111.2 26
Show 18329+3850 SLE 200 AF 344 134.6 26
Show 18329+3850 STTA171 AG 133 80.7 26
Show 18329+3850 FYM 41 AH 349 74.6 26
Show 18329+3850 FYM 41 AI 349 81.5 26
Show 18329+3850 FYM 41 AJ 125 129.9 26
Show 18329+3850 FYM 41 AK 289 100.5 26
Show 18329+3850 FYM 41 AL 302 115.2 26
Show 18329+3850 FYM 41 AM 309 126.0 26
Show 18298+3803 HU 1189 210 1.4 39
Show 18343+3832 SLE 210 237 9.6 41
Show 18272+3847 MLB 854 9 6.8 43
Show 18297+3929 TDT 910 196 0.8 52
Show 18298+3930 SLE 182 252 11.4 53
Show 18301+3746 UC 3595 211 45.6 55
Show 18323+3933 UC 3603 311 54.4 57
Show 18335+3934 SLE 208 AB 81 13.2 63
Show 18335+3934 SLE 208 A,CD 3 63.5 63
Show 18335+3934 COU1606 CD 130 1.9 64
Show 18362+3858 ES 2571 70 6.8 65
Show 18367+3911 OL 14 AB 339 1.0 66
Show 18367+3911 DAM 678 AB,C 163 12.3 66
Show 18367+3841 FYM 506 BC 253 23.6 68
Show 18367+3841 H 4 59 AB 298 29.8 68
Show 18366+3859 MLB 755 100 9.3 70
Show 18369+3846 STFB 9 CD 28 23.5 70
Show 18369+3846 STF3136 BC 310 83.7 71
Show Vega 18369+3846 H 5 39 AB 185 84.5 71
Show Vega 18369+3846 STFB 9 AC 255 76.0 71
Show Vega 18369+3846 STFB 9 AE 40 84.3 71
Show Vega 18369+3846 MET 11 AF 103 22.3 71
Show Vega 18369+3846 MET 11 AG 92 22.3 71
Show Vega 18369+3846 MET 11 AH 96 27.7 71
Show Vega 18369+3846 MET 11 A,Ia 86 29.4 71
Show Vega 18369+3846 MET 11 A,Ib 86 29.9 71

 
 
WDS 18309+3840 : COMPONENTS
 
 
  A B C D
B pa=307.1°
sep=10.20"
 
C pa=206.5°
sep=76.57"
pa=199.2°
sep=79.08"
 
D pa=210.2°
sep=86.05"
pa=203.6°
sep=87.87"
pa=237.0°
sep=10.80"
 
E pa=159.1°
sep=49.71"
pa=153.8°
sep=58.62"
pa=67.0°
sep=56.47"
pa=65.4°
sep=67.13"
 
 
18309+3840 A
 
 
Coord arcsec 2000 183054.75+383933.8 Mag 9.3 Spectral class K2 (yellow-orange) PmRA -11.00
PmDE -7.0 Tycho2 3105-00683-1
Tycho2
Tycho2 3105-00683-1 Pflag RAmdeg 277.72815047 DEmdeg 38.65939668
PmRA -14.1 PmDE -4.7 E RAmdeg 20 E DEmdeg 21
E pmRA 2.1 E pmDE 2.0 EpRAm 1990.01 EpDEm 1989.69
Num 6 Q RAmdeg 0.9 Q DEmdeg 1.4 Q pmRA 1.0
Q pmDE 1.4 BTmag 10.953 E BTmag 0.052 VTmag 9.616
E VTmag 0.025 Prox 766 TYC T HIP
CCDM RAdeg 277.72819194 DEdeg 38.65940750 EpRA 1990 1.62
EpDE 1990 1.61 E RAdeg 19.5 E DEdeg 20.8 Posflg
Corr 0.1
 
 
18309+3840 B
 
 
Coord arcsec 2000 183054.06+383940.0 Mag 11.2 PmRA 0.00 PmDE -9.0
Calc delta mag 1.9 Calc coord yes
 
 
18309+3840 C
 
 
Var name KP Lyr Coord arcsec 2000 183051.83+383825.3 Coord calc 183051.83+383825.3 Mag 9.62
Spectral class Ma (red) PmRA 2.00 PmDE -7.0 Tycho2 3105-00726-1
Calc delta mag 0.32
Tycho2
Tycho2 3105-00726-1 Pflag RAmdeg 277.71598541 DEmdeg 38.64036481
PmRA -1.9 PmDE -4.4 E RAmdeg 15 E DEmdeg 16
E pmRA 2.0 E pmDE 2.0 EpRAm 1989.99 EpDEm 1990.05
Num 8 Q RAmdeg 1.1 Q DEmdeg 1.7 Q pmRA 1.0
Q pmDE 1.6 BTmag 11.050 E BTmag 0.055 VTmag 9.298
E VTmag 0.020 Prox 766 TYC T HIP
CCDM RAdeg 277.71599167 DEdeg 38.64037417 EpRA 1990 1.63
EpDE 1990 1.61 E RAdeg 15.8 E DEdeg 16.9 Posflg
Corr 0.1
 
 
18309+3840 D
 
 
Coord arcsec 2000 183051.06+383819.4 Mag 14.8 Calc delta mag 5.5 Calc coord yes
 
 
18309+3840 E
 
 
Coord arcsec 2000 183056.27+383847.4 Mag 13 Spectral class V PmRA 6.00
PmDE 9.0 Calc delta mag 3.7 Calc coord yes