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Doubles in session


Current system
20418+1231
STF 2715
HD 197179


Nearby doubles
18' : 20426+1244
STF2718AB

19' : 20420+1212
BPM2231

20' : 20428+1244
BPM2234

21' : 20405+1240
HEI 278

28' : 20410+1206
HEI 587

29' : 20402+1248
BPM2223

32' : 20426+1300
GWP2988

34' : 20441+1258
J 1889

35' : 20414+1157
TDT2472

36' : 20440+1225
HJ 1566AB

38' : 20439+1255
J 1888

40' : 20419+1150
HEI 588

41' : 20391+1243
BPM2218

42' : 20440+1256
DAM 218

42' : 20442+1209
BPM2240

43' : 20429+1152
BPM2235

47' : 20444+1205
A 875

48' : 20449+1219
STF2723AB

49' : 20450+1244
BU 64AB

50' : 20396+1310
J 912

53' : 20404+1143
UC 4253

56' : 20446+1154
BPM2251

57' : 20413+1327
BPM2227AB

58' : 20446+1312
TDS1098

63' : 20460+1235
KPP 477

63' : 20408+1332
GWP2982



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.

20418+1231 STF 2715 (HD 197179)

 
 
20h 41m 46.01s +12° 31' 07.1" P.A. 2.00 sep 12.4 mag 7.80,10.22 Sp F8 dist. 92.42 pc (301.47 l.y.)
 
 
Coord 2000 20418+1231 Discov num STF2715 Comp Coord arcsec 2000 20 41 46.01 +12 31 07.1
Date first 1830 Date last 2016 Obs 32
Pa first 2 Pa last 2.4 P.A. Now (θ) 2.4°
Sep first 12.0 Sep last 12.392 Sep. Now (ρ) 12.392"
Mag pri 7.80 Mag sec 10.22 delta mag (ΔM) 2.42 Spectral class F8 (yellow-white)
Pri motion ra +050 Sec motion ra +052
Pri motion dec -033 Sec motion dec -032
Notes T (Parallax indicates physical)
rPM=0.037 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 197179 Constellation Delphinus SAO 106390 HIP 102131
Tycho2 1097-02967-1 Gaia DR2 1755214393549885696 HD 197179 GC 28837
BD BD+12 4431 Distance 92.42 Distance ly 301.47
 
 
WDS 20418+1231 STF 2715 (HD 197179) : NOTES
 
 
No records found.

 
 
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
20418+1231 STF2715 2007 19 2 12.3 7.80 10.22 F8 D 204146.01+123107.1
20418+1231 STF2715 2009 20 3 12.3 7.80 10.22 F8 D 204146.01+123107.1
20418+1231 STF2715 2013 24 3 12.3 7.80 10.22 F8 204146.01+123107.1
20418+1231 STF2715 2015 26 2 12.4 7.80 10.22 F8 204146.01+123107.1
20418+1231 STF2715 2016 32 2 12.4 7.80 10.22 F8 T 204146.01+123107.1

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

 
 
WDS 20418+1231 STF 2715 (HD 197179) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20418+1231 STF 2715 (HD 197179) : MEASURES
 
 
No records found.

 
 
WDS 20418+1231 (HD 197179) : VIRTUAL EYEPIECE
 
 

20418+1231 STF2715A mag 7.8 Sp F8 20418+1231 STF2715B sep 12.4 P.A. 2.30 mag 10.22 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 20418+1231 (HD 197179) : ALADIN DSS IMAGE @ 20h 41m 46.01s +12° 31' 07.1"
 
 
 
 
WDS 20418+1231 STF 2715 (HD 197179) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20418+1231 STF2715 distance=0' 20426+1244 STF2718AB distance=18' 20426+1244 STF2718AC distance=18' 20426+1244 STF2718BC distance=18' 20420+1212 BPM2231 distance=19' 20428+1244 BPM2234 distance=20' 20405+1240 HEI 278 distance=21' 20410+1206 HEI 587 distance=28' 20402+1248 BPM2223 distance=29' 20426+1300 GWP2988 distance=32' 20441+1258 J 1889 distance=34' 20414+1157 TDT2472 distance=35' 20440+1225 HJ 1566AB distance=36' 20440+1225 HJ 1566AC distance=36' 20439+1255 J 1888 distance=38' 20419+1150 HEI 588 distance=40' 20391+1243 BPM2218 distance=41' 20440+1256 DAM 218 distance=42' 20442+1209 BPM2240 distance=42' 20429+1152 BPM2235 distance=43' 20444+1205 A 875 distance=47' 20449+1219 B 2910Aa,Ab distance=48' 20449+1219 STF2723AB distance=48' 20449+1219 BU 1492AC distance=48' 20450+1244 BU 64AB distance=49' 20450+1244 STTA209AC distance=49' 20450+1244 BU 64AD distance=49' 20450+1244 D 32CD distance=50' 20396+1310 J 912 distance=50' 20404+1143 UC 4253 distance=53' 20446+1154 BPM2251 distance=56' 20413+1327 BPM2228BC distance=56' 20413+1327 BPM2227AB distance=57' 20446+1312 TDS1098 distance=58' 20460+1235 KPP 477 distance=63' 20408+1332 GWP2982 distance=63' 20457+1302 WFC 258 distance=65' 20426+1335 HEI 279BC distance=66' 20426+1335 HEI 279AB distance=66' 20438+1330 BPM2238 distance=66' 20373+1230 UC 4235 distance=66' 20372+1224 BPM2209 distance=68' 20387+1139 GWP2975 distance=69' 20402+1126 BPM2224 distance=69' 20372+1250 A 1680 distance=70' 20391+1329 TDT2453Aa,Ab distance=70' 20391+1329 UC 4242AB distance=70' 20421+1341 BPM2232 distance=71' 20424+1117 OSO 131AB distance=75' 20424+1117 OSO 131AC distance=75' 20424+1117 OSO 131AD distance=75' 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 20418+1231 STF2715 2 12.4
Show 20426+1244 STF2718 AB 87 8.5 18
Show 20426+1244 STF2718 AC 346 167.2 18
Show 20426+1244 STF2718 BC 346 167.3 18
Show 20420+1212 BPM2231 330 108.9 19
Show 20428+1244 BPM2234 331 93.5 20
Show 20405+1240 HEI 278 135 3.4 21
Show 20410+1206 HEI 587 36 1.2 28
Show 20402+1248 BPM2223 290 95.3 29
Show 20426+1300 GWP2988 23 19.1 32
Show 20441+1258 J 1889 10 4.6 34
Show 20414+1157 TDT2472 309 0.5 35
Show 20440+1225 HJ 1566 AB 16 16.9 36
Show 20440+1225 HJ 1566 AC 331 32.4 36
Show 20439+1255 J 1888 158 10.0 38
Show 20419+1150 HEI 588 293 2.3 40
Show 20391+1243 BPM2218 252 64.4 41
Show 20440+1256 DAM 218 342 5.7 42
Show 20442+1209 BPM2240 148 55.1 42
Show 20429+1152 BPM2235 142 114.9 43
Show 20444+1205 A 875 208 2.5 47
Show 20449+1219 B 2910 Aa,Ab 52 0.1 48
Show 20449+1219 STF2723 AB 140 1.0 48
Show 20449+1219 BU 1492 AC 30 37.0 48
Show 20450+1244 BU 64 AB 174 0.7 49
Show 20450+1244 STTA209 AC 155 97.2 49
Show 20450+1244 BU 64 AD 117 64.3 49
Show 20450+1244 D 32 CD 15 60.8 50
Show 20396+1310 J 912 125 1.8 50
Show 20404+1143 UC 4253 315 19.7 53
Show 20446+1154 BPM2251 51 84.7 56
Show 20413+1327 BPM2228 BC 141 118.1 56
Show 20413+1327 BPM2227 AB 173 68.5 57
Show 20446+1312 TDS1098 279 0.9 58
Show 20460+1235 KPP 477 52 4.5 63
Show 20408+1332 GWP2982 31 88.8 63
Show 20457+1302 WFC 258 284 11.7 65
Show 20426+1335 HEI 279 BC 211 4.1 66
Show 20426+1335 HEI 279 AB 115 25.1 66
Show 20438+1330 BPM2238 50 66.9 66
Show 20373+1230 UC 4235 132 44.9 66
Show 20372+1224 BPM2209 213 61.9 68
Show 20387+1139 GWP2975 166 5.8 69
Show 20402+1126 BPM2224 331 104.0 69
Show 20372+1250 A 1680 295 3.8 70
Show 20391+1329 TDT2453 Aa,Ab 117 0.5 70
Show 20391+1329 UC 4242 AB 105 45.3 70
Show 20421+1341 BPM2232 346 68.4 71
Show 20424+1117 OSO 131 AB 222 13.0 75
Show 20424+1117 OSO 131 AC 161 14.1 75
Show 20424+1117 OSO 131 AD 37 20.6 75

 
 
WDS 20418+1231 : COMPONENTS
 
 
  A
B pa=2.3°
sep=12.39"
 
 
20418+1231 A
 
 
Componente originario normalizzato AB Name HD 197179 Coord arcsec 2000 204146.01+123107.1 Mag 7.8
Spectral class F8 (yellow-white) PmRA 50.00 PmDE -33.0 SAO 106390
HIP 102131 Tycho2 1097-02967-1 HD 197179 GC 28837
BD BD+12 4431
Tycho2
Tycho2 1097-02967-1 Pflag RAmdeg 310.44170032 DEmdeg 12.51862588
PmRA 50.1 PmDE -33.5 E RAmdeg 5 E DEmdeg 6
E pmRA 1.4 E pmDE 1.3 EpRAm 1991.50 EpDEm 1991.16
Num 10 Q RAmdeg 1.0 Q DEmdeg 1.2 Q pmRA 1.1
Q pmDE 1.2 BTmag 8.252 E BTmag 0.016 VTmag 7.800
E VTmag 0.011 Prox 124 TYC T HIP 102131
CCDM A RAdeg 310.44158194 DEdeg 12.51870500 EpRA 1990 1.71
EpDE 1990 1.49 E RAdeg 4.8 E DEdeg 5.6 Posflg
Corr -0.1
SAO
SAO 106390 DelFlag RA1950 PmRA1950 0.0032
DE1950 PmDE1950 -0.041 Vmag 7.6 SpType F8
Double code Source 70 CatNum 28837 DM BD+12 4431
DMcomp BDsup HD 197179 M HD 0
GC 28837 RA1950rad 5.40785155 DE1950rad 0.2153628 PmRA2000 0.0033
PmDE2000 -0.044
Hipparcos
Catalog H HIP 102131 Proxy RAhms 20 41 45.98
DEdms +12 31 07.4 Vmag 7.76 VarFlag R Vmag G
RAdeg 310.442 DEdeg 12.5187 AstroRef A Plx 12.29
CCDM 20418+1231 N CCDM I Nsys 2 Ncomp 1
MultFlag C Source P Qual A M HIP
Theta Rho HD 197179 BD BD+12 4431
CD CP Dm number +12 4431 VIred 0.52
SpType F8 R SpType Coord arcsec 2000 204145.98+123107.4
Hipparcos 2
HIP 102131 Sn 95 So 3 Nc 1
RArad 5.4182275825 DErad 0.2184926819 Plx 10.82 PmRA 49.91
PmDE -32.28 E RArad 0.8 E DErad 0.58 E Plx 1.01
E pmRA 1.04 E pmDE 0.64 Hpmag 7.8481 E Hpmag 0.0053
SHp 0.018 VA 0 BV 0.453 E BV 0.015
VI 0.52
CCDM
Ccdm 20418+1231 RComp Comp A Note1
Note2 Discov num DRAs -2.03 DDEs 6.5
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.7 Sp F8 PmNote *
PmRA 42 PmDE -38 Dm number +12 4431 Cat1 BD
Name2 +12 2368 Cat2 AGK2/3 HD 197179 M HD
ADS BDS A14168 M ADS BDS N IDS IDS 20370N1210A
HIC 102131
 
 
20418+1231 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204146.04+123119.5 Mag 10.22 PmRA 52.00
PmDE -32.0 HIP 102132 Calc delta mag 2.42 Calc coord yes
Hipparcos
Catalog H HIP 102132 Proxy RAhms 20 41 46.01
DEdms +12 31 19.7 Vmag 10.7 VarFlag R Vmag H
RAdeg 310.442 DEdeg 12.5221 AstroRef B Plx -3.12
CCDM 20418+1231 N CCDM I Nsys 2 Ncomp 1
MultFlag C Source I Qual A M HIP
Theta Rho HD BD
CD CP Dm number VIred 0.71
SpType R SpType Coord arcsec 2000 204146.01+123119.7
Hipparcos 2
HIP 102132 Sn 95 So 3 Nc 1
RArad 5.4182299525 DErad 0.218552612 Plx 9.67 PmRA 48.68
PmDE -34.2 E RArad 0.96 E DErad 0.75 E Plx 1.22
E pmRA 1.21 E pmDE 0.83 Hpmag 10.9827 E Hpmag 0.0817
SHp 0 VA 0 BV 0.923 E BV 0.079
VI 0.92
CCDM
Ccdm 20418+1231 RComp Comp B Note1
Note2 Discov num STF2715 DRAs DDEs
R dRAs Year 1830 Theta 003 Rho 12.0
Obs 6 Vmag 10.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14168 M ADS BDS N IDS IDS 20370N1210B
HIC 102132