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Current system
20387+3838
STF 2708 AC


Nearby doubles
18' : 20378+3824
SEI1195

19' : 20371+3837
SEI1193

20' : 20402+3846
TDT2459

23' : 20373+3822
SEI1194

24' : 20400+3821
KPP 5

26' : 20383+3814
SEI1202

29' : 20366+3825
HJ 1548

32' : 20363+3854
MLB 953

33' : 20361+3852
SEI1189

33' : 20379+3909
SEI1198

33' : 20396+3908
SEI1210

33' : 20374+3907
TDT2431

34' : 20392+3910
MLB 954AB

34' : 20390+3804
SEI1204

34' : 20380+3806
SEI1197

37' : 20367+3906
AG 259

39' : 20410+3905
HJ 612AB

39' : 20415+3818
TDT2473

40' : 20391+3759
SEI1208

40' : 20362+3812
ES 2511

41' : 20420+3827
AG 263

42' : 20357+3901
SEI1185

44' : 20408+3802
ALI 672

45' : 20349+3840
SEI1177

46' : 20404+3758
SEI1212AB

46' : 20357+3908
COU2289



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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20387+3838 STF 2708 AC

 
 
20h 38m 40.19s +38° 38' 06.3" P.A. 336.00 sep 40.6 mag 6.83,13.70 Sp G2V dist. 27.16 pc (88.6 l.y.)
 
 
Coord 2000 20387+3838 Discov num STF2708 Comp AC Coord arcsec 2000 20 38 40.19 +38 38 06.3
Date first 1878 Date last 2015 Obs 8
Pa first 48 Pa last 335.6 P.A. Now (θ) 335.6°
Sep first 15.0 Sep last 40.598 Sep. Now (ρ) 40.598"
Mag pri 6.83 Mag sec 13.70 delta mag (ΔM) 6.87 Spectral class G2V (yellow)
Pri motion ra +201 Sec motion ra -000
Pri motion dec -193 Sec motion dec +009
Notes N U (See Notes, Proper motion indicates non-physical)
rPM=1.023
This double is not physical.
 
 
20387+3838 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 196850 70321 20 38 40 +38 38 06 STF 2708 AB 2018 133 323 57.9 6.83 8.67 1.84
Show 70321 20 38 40 +38 38 06 STF 2708 AC 2015 8 336 40.6 6.83 13.70 6.87 <===
Show 70321 20 38 40 +38 38 06 STF 2708 AD 2015 16 231 115.6 6.83 11.26 4.43
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus SAO 70321 HIP 101875 Tycho2 3153-00705-1
Gaia DR2 2063583390317759616 HD 196850 GL Gl 794.3 BD BD+38 4172
Distance 27.16 Distance ly 88.6
 
 
WDS 20387+3838 STF 2708 AC : NOTES
 
 
discov_num notes refcode
STF2708 AB and AC: Optical pairs, based on study of relative motion of the
components using the method of apparent motion parameters. Kiy2008
AB: H N 87. MEv2010
 
 
REFERENCES
 
 
refcode metd author reference
Kiy2008 - Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. 2008SvAL...32..405K
Kiy2008 SvAL 34, 405, 2008
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
 
 
DISCOVERER
 
 
idgroup discov author
1 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
20387+3838 STF2708 AC 1911 5 14 16.9 6.83 13.30 G2V N 203840.04+383808.0
20387+3838 STF2708 AC 2000 7 338 36.6 6.83 13.70 G2V NU 203840.04+383808.0
20387+3838 STF2708 AC 2013 8 336 40.1 6.83 13.70 G2V NU 203840.04+383808.0
20387+3838 STF2708 AC 2015 9 336 40.6 6.83 13.70 G2V NU 203840.19+383806.3

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

 
 
WDS 20387+3838 STF 2708 AC : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20387+3838 STF 2708 AC : MEASURES
 
 
No records found.

 
 
WDS 20387+3838 : VIRTUAL EYEPIECE
 
 

20387+3838 STF2708A mag 6.83 Sp G2V 20387+3838 STF2708B sep 53.6 P.A. 329.10 mag 8.67 20387+3838 STF2708C sep 39.2 P.A. 340.50 mag 13.7 20387+3838 STF2708D sep 100.9 P.A. 224.40 mag 11.26 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 20387+3838 : ALADIN DSS IMAGE @ 20h 38m 40.19s +38° 38' 06.3"
 
 
 
 
WDS 20387+3838 STF 2708 AC : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20387+3838 STF2708AC distance=0' 20378+3824 SEI1195 distance=18' 20371+3837 SEI1193 distance=19' 20402+3846 TDT2459 distance=20' 20373+3822 SEI1194 distance=23' 20400+3821 KPP 5 distance=24' 20383+3814 SEI1202 distance=26' 20384+3811 TDT2444Aa,Ab distance=28' 20366+3825 HJ 1548 distance=29' 20363+3854 MLB 953 distance=32' 20361+3852 SEI1189 distance=33' 20379+3909 SEI1198 distance=33' 20396+3908 SEI1210 distance=33' 20374+3907 TDT2431 distance=33' 20392+3910 MLB 954AB distance=34' 20392+3910 MLB 954AC distance=34' 20390+3804 SEI1204 distance=34' 20380+3806 SEI1197 distance=34' 20367+3906 AG 259 distance=37' 20410+3905 MCA 62Aa,Ab distance=39' 20410+3905 HJ 612AB distance=39' 20415+3818 TDT2473 distance=39' 20391+3759 SEI1208 distance=40' 20362+3812 ES 2511 distance=40' 20420+3827 AG 263 distance=41' 20357+3901 SEI1185 distance=42' 20408+3802 ALI 672 distance=44' 20349+3840 SEI1177 distance=45' 20404+3758 SEI1212AB distance=46' 20404+3758 FYM 327AC distance=46' 20357+3908 COU2289 distance=46' 20349+3849 SEI1176 distance=46' 20412+3801 ES 2512 distance=47' 20348+3852 GRV 357 distance=47' 20354+3810 RAO 439 distance=48' 20344+3852 SEI1172 distance=52' 20430+3850 ES 2053 distance=52' 20341+3847 KPP4206 distance=55' 20351+3914 MLB 777 distance=55' 20433+3847 GRV 371 distance=56' 20382+3742 SEI1201 distance=57' 20436+3834 BRT2232 distance=58' 20380+3741 TOB 193AB distance=58' 20380+3741 TOB 193AC distance=58' 20337+3835 A 1431 distance=59' 20350+3757 SEI1178AB distance=61' 20350+3757 BKO 570AC distance=61' 20419+3752 TDT2478 distance=61' 20352+3755 SEI1182 distance=61' 20352+3754 SEI1180AB distance=61' 20352+3754 SEI1181AC distance=61' 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 20387+3838 STF2708 AB 323 57.9
Show 20387+3838 STF2708 AC 336 40.6
Show 20387+3838 STF2708 AD 231 115.6
Show 20378+3824 SEI1195 219 9.1 18
Show 20371+3837 SEI1193 353 17.1 19
Show 20402+3846 TDT2459 36 1.4 20
Show 20373+3822 SEI1194 113 25.1 23
Show 20400+3821 KPP 5 337 3.1 24
Show 20383+3814 SEI1202 89 14.1 26
Show 20384+3811 TDT2444 Aa,Ab 319 1.0 28
Show 20366+3825 HJ 1548 249 14.0 29
Show 20363+3854 MLB 953 9 6.0 32
Show 20361+3852 SEI1189 36 2.2 33
Show 20379+3909 SEI1198 307 13.9 33
Show 20396+3908 SEI1210 303 12.0 33
Show 20374+3907 TDT2431 244 0.6 33
Show 20392+3910 MLB 954 AB 57 3.1 34
Show 20392+3910 MLB 954 AC 284 109.5 34
Show 20390+3804 SEI1204 291 7.8 34
Show 20380+3806 SEI1197 173 14.3 34
Show 20367+3906 AG 259 313 2.8 37
Show 20410+3905 MCA 62 Aa,Ab 276 0.1 39
Show 20410+3905 HJ 612 AB 9 48.9 39
Show 20415+3818 TDT2473 169 0.6 39
Show 20391+3759 SEI1208 11 7.5 40
Show 20362+3812 ES 2511 251 7.2 40
Show 20420+3827 AG 263 70 1.6 41
Show 20357+3901 SEI1185 298 3.5 42
Show 20408+3802 ALI 672 167 12.4 44
Show 20349+3840 SEI1177 139 13.0 45
Show 20404+3758 SEI1212 AB 195 18.9 46
Show 20404+3758 FYM 327 AC 30 14.0 46
Show 20357+3908 COU2289 155 0.7 46
Show 20349+3849 SEI1176 11 19.9 46
Show 20412+3801 ES 2512 327 6.9 47
Show 20348+3852 GRV 357 275 22.5 47
Show 20354+3810 RAO 439 235 0.7 48
Show 20344+3852 SEI1172 149 21.8 52
Show 20430+3850 ES 2053 223 4.5 52
Show 20341+3847 KPP4206 215 1.6 55
Show 20351+3914 MLB 777 186 6.3 55
Show 20433+3847 GRV 371 180 65.5 56
Show 20382+3742 SEI1201 350 22.8 57
Show 20436+3834 BRT2232 269 5.8 58
Show 20380+3741 TOB 193 AB 231 28.1 58
Show 20380+3741 TOB 193 AC 267 31.4 58
Show 20337+3835 A 1431 29 0.9 59
Show 20350+3757 SEI1178 AB 174 19.1 61
Show 20350+3757 BKO 570 AC 12 6.2 61
Show 20419+3752 TDT2478 339 1.9 61
Show 20352+3755 SEI1182 115 8.9 61

 
 
WDS 20387+3838 : COMPONENTS
 
 
  A B C
B pa=329.1°
sep=53.57"
 
C pa=340.5°
sep=39.22"
pa=121.9°
sep=17.00"
 
D pa=224.4°
sep=100.91"
pa=200.0°
sep=125.67"
pa=207.8°
sep=123.31"
 
 
20387+3838 A
 
 
Name HD 196850 Coord arcsec 2000 203840.19+383806.3 Mag 6.83 Spectral class G2V (yellow)
PmRA 201.00 PmDE -193.0 SAO 70321 HIP 101875
Tycho2 3153-00705-1 HD 196850 GC 28760 BD BD+38 4172
Tycho2
Tycho2 3153-00705-1 Pflag RAmdeg 309.66746229 DEmdeg 38.63508999
PmRA 202.2 PmDE -194.8 E RAmdeg 4 E DEmdeg 4
E pmRA 1.0 E pmDE 1.1 EpRAm 1991.35 EpDEm 1991.40
Num 14 Q RAmdeg 0.8 Q DEmdeg 0.5 Q pmRA 0.7
Q pmDE 0.5 BTmag 7.523 E BTmag 0.015 VTmag 6.828
E VTmag 0.010 Prox 508 TYC T HIP 101875
CCDM RAdeg 309.66685806 DEdeg 38.63554111 EpRA 1990 1.60
EpDE 1990 1.66 E RAdeg 3.8 E DEdeg 3.8 Posflg
Corr 0.0
SAO
SAO 70321 DelFlag RA1950 PmRA1950 0.0157
DE1950 PmDE1950 -0.187 Vmag 6.8 SpType G0
Double code Source 70 CatNum 28760 DM BD+38 4172
DMcomp BDsup HD 196850 M HD 0
GC 28760 RA1950rad 5.39645672 DE1950rad 0.67127153 PmRA2000 0.0161
PmDE2000 -0.188
Hipparcos
Catalog H HIP 101875 Proxy RAhms 20 38 40.04
DEdms +38 38 08.0 Vmag 6.76 VarFlag R Vmag G
RAdeg 309.667 DEdeg 38.6356 AstroRef Plx 37.12
CCDM 20386+3838 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 196850 BD BD+38 4172
CD CP Dm number +38 4172 VIred 0.68
SpType G0 R SpType Coord arcsec 2000 203840.04+383808.0
Hipparcos 2
HIP 101875 Sn 5 So 0 Nc 1
RArad 5.4047058261 DErad 0.6743177798 Plx 36.82 PmRA 201.26
PmDE -192.6 E RArad 0.29 E DErad 0.3 E Plx 0.4
E pmRA 0.29 E pmDE 0.3 Hpmag 6.8935 E Hpmag 0.0006
SHp 0.007 VA 0 BV 0.61 E BV 0
VI 0.68
 
 
20387+3838 B
 
 
Coord arcsec 2000 203837.84+383852.3 Mag 8.67 PmRA 24.00 PmDE -5.0
Tycho2 3153-00699-1 Calc delta mag 1.84 Calc coord yes
Tycho2
Tycho2 3153-00699-1 Pflag RAmdeg 309.65619276 DEmdeg 38.64691858
PmRA 24.4 PmDE -7.7 E RAmdeg 8 E DEmdeg 7
E pmRA 1.2 E pmDE 1.2 EpRAm 1990.98 EpDEm 1991.26
Num 6 Q RAmdeg 1.8 Q DEmdeg 0.4 Q pmRA 1.7
Q pmDE 0.5 BTmag 9.197 E BTmag 0.018 VTmag 8.667
E VTmag 0.014 Prox 508 TYC T HIP
CCDM RAdeg 309.65611917 DEdeg 38.64693639 EpRA 1990 1.53
EpDE 1990 1.65 E RAdeg 7.6 E DEdeg 7.3 Posflg
Corr -0.2
 
 
20387+3838 C
 
 
Coord arcsec 2000 203839.07+383843.3 Mag 13.7 PmRA 0.00 PmDE 9.0
Calc delta mag 6.87 Calc coord yes
 
 
20387+3838 D
 
 
Coord arcsec 2000 203834.17+383654.2 Mag 11.26 PmRA -6.00 PmDE -19.0
Calc delta mag 4.43 Calc coord yes