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Current system
20457+3917
SEI 1241


Nearby doubles
13' : 20449+3908
SEI1236

14' : 20445+3921
HJ 1572

20' : 20461+3858
CRB 11

22' : 20441+3927
ES 1981

23' : 20453+3854
SEI1239

24' : 20438+3928
SEI1230

25' : 20435+3919
SEI1229

25' : 20459+3852
COU2294

28' : 20480+3917
A 1434AB

31' : 20471+3850
HJ 1575

38' : 20434+3943
TDT2497

38' : 20489+3919
TDT2558

38' : 20478+3944
GRV 381

39' : 20449+3839
ALI 951

40' : 20433+3847
GRV 371

40' : 20490+3925
TDT2560

42' : 20430+3850
ES 2053

43' : 20440+3839
COU2292

43' : 20440+3838
TDT2506

44' : 20493+3923
SEI1263AB

44' : 20476+3839
SEI1249

45' : 20478+3840
SEI1251

47' : 20427+3947
TDT2491

49' : 20450+3827
ALI 947

50' : 20436+3834
BRT2232

50' : 20490+3947
STF2731AB



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

20457+3917 SEI 1241

 
 
20h 45m 39.29s +39° 16' 20.6" P.A. 309.00 sep 7.1 mag 11.30,11.48
 
 
Coord 2000 20457+3917 Discov num SEI1241 Comp Coord arcsec 2000 20 45 39.29 +39 16 20.6
Date first 1896 Date last 2016 Obs 14
Pa first 308 Pa last 308.7 P.A. Now (θ) 308.7°
Sep first 7.1 Sep last 7.065 Sep. Now (ρ) 7.065"
Mag pri 11.30 Mag sec 11.48 delta mag (ΔM) 0.18 Spectral class
Pri motion ra +004 Sec motion ra +003
Pri motion dec -004 Sec motion dec -004
Notes V (Proper motion indicates physical)
rPM=0.177 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus Tycho2 3166-00174-2 Gaia DR2 2063489588241787392
 
 
WDS 20457+3917 SEI 1241 : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Sei1908 Pa - Scheiner, J. 1908POPot..59.....S
Sei1908 +Po Pub. Obs. Potsdam 20, #59, 1908
Sei1913A Pa - Scheiner, J. 1913QB811.B8.......
Sei1913A cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Sei1932A Pa - Scheiner, J. 1932QB821.A43......
Sei1932A cited in ADS (Aitken Double Star Cat.), 1932
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20457+3917 SEI1241 1998 6 309 7.0 11.30 11.48 D 204539.29+391620.6
20457+3917 SEI1241 2002 7 309 7.1 11.30 11.48 D 204539.29+391620.6
20457+3917 SEI1241 2010 8 308 5.8 11.30 11.48 204539.29+391620.6
20457+3917 SEI1241 2015 9 309 7.1 11.30 11.48 204539.29+391620.6
20457+3917 SEI1241 2016 14 309 7.1 11.30 11.48 V 204539.29+391620.6

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

 
 
WDS 20457+3917 SEI 1241 : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20457+3917 SEI 1241 : MEASURES
 
 
No records found.

 
 
WDS 20457+3917 : VIRTUAL EYEPIECE
 
 

20457+3917 SEI1241A mag 11.3 20457+3917 SEI1241B sep 6.1 P.A. 316.00 mag 11.48 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 20457+3917 : ALADIN DSS IMAGE @ 20h 45m 39.29s +39° 16' 20.6"
 
 
 
 
WDS 20457+3917 SEI 1241 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20457+3917 SEI1241 distance=0' 20449+3908 SEI1236 distance=13' 20445+3921 HJ 1572 distance=14' 20461+3858 CRB 11 distance=20' 20441+3927 ES 1981 distance=22' 20453+3854 SEI1239 distance=23' 20438+3928 SEI1230 distance=24' 20435+3919 SEI1229 distance=25' 20459+3852 COU2294 distance=25' 20480+3917 A 1434AB distance=28' 20480+3917 A 1434AB,C distance=28' 20471+3850 HJ 1575 distance=31' 20434+3943 TDT2497 distance=38' 20489+3919 TDT2558 distance=38' 20478+3944 GRV 381 distance=38' 20449+3839 ALI 951 distance=39' 20433+3847 GRV 371 distance=40' 20490+3925 TDT2560 distance=40' 20430+3850 ES 2053 distance=42' 20440+3839 COU2292 distance=43' 20440+3838 TDT2506 distance=43' 20493+3923 SEI1263AB distance=44' 20493+3923 ALI 952BC distance=44' 20493+3923 DAM 26BD distance=44' 20476+3839 SEI1249 distance=44' 20478+3840 SEI1251 distance=45' 20427+3947 TDT2491 distance=47' 20450+3827 ALI 947 distance=49' 20436+3834 BRT2232 distance=50' 20490+3947 STF2731AB distance=50' 20490+3947 HO 596AC distance=50' 20490+3947 HO 596AD distance=50' 20470+3828 ES 2054 distance=51' 20481+3958 CVR 231 distance=51' 20498+3900 MLB 983 distance=52' 20434+4001 BRT2272 distance=52' 20461+3824 ALI 949 distance=53' 20453+4010 COU2293 distance=54' 20454+4011 TDT2518 distance=55' 20484+4002 SEI1255AB distance=56' 20410+3905 MCA 62Aa,Ab distance=56' 20410+3905 HJ 612AB distance=56' 20484+4002 J 1237BC distance=56' 20486+4000 TOB 198 distance=57' 20419+3953 SEI1222 distance=58' 20416+3950 COU2290 distance=58' 20456+4014 TDT2519 distance=59' 20419+3956 SEI1221 distance=59' 20510+3915 SEI1279AB distance=63' 20510+3915 SEI1279BC distance=63' 20466+4020 ES 1982 distance=65' 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 20457+3917 SEI1241 309 7.1
Show 20449+3908 SEI1236 318 27.4 13
Show 20445+3921 HJ 1572 280 15.6 14
Show 20461+3858 CRB 11 272 10.8 20
Show 20441+3927 ES 1981 310 4.5 22
Show 20453+3854 SEI1239 40 26.8 23
Show 20438+3928 SEI1230 124 25.3 24
Show 20435+3919 SEI1229 156 19.6 25
Show 20459+3852 COU2294 125 0.9 25
Show 20480+3917 A 1434 AB 178 0.0 28
Show 20480+3917 A 1434 AB,C 256 2.5 28
Show 20471+3850 HJ 1575 51 14.9 31
Show 20434+3943 TDT2497 317 0.5 38
Show 20489+3919 TDT2558 191 1.1 38
Show 20478+3944 GRV 381 340 35.8 38
Show 20449+3839 ALI 951 49 11.1 39
Show 20433+3847 GRV 371 180 65.5 40
Show 20490+3925 TDT2560 38 1.1 40
Show 20430+3850 ES 2053 223 4.5 42
Show 20440+3839 COU2292 240 0.3 43
Show 20440+3838 TDT2506 23 2.9 43
Show 20493+3923 SEI1263 AB 98 23.6 44
Show 20493+3923 ALI 952 BC 50 4.9 44
Show 20493+3923 DAM 26 BD 53 9.5 44
Show 20476+3839 SEI1249 69 27.8 44
Show 20478+3840 SEI1251 42 15.2 45
Show 20427+3947 TDT2491 275 1.4 47
Show 20450+3827 ALI 947 69 6.9 49
Show 20436+3834 BRT2232 269 5.8 50
Show 20490+3947 STF2731 AB 86 4.1 50
Show 20490+3947 HO 596 AC 178 18.0 50
Show 20490+3947 HO 596 AD 247 18.2 50
Show 20470+3828 ES 2054 192 2.7 51
Show 20481+3958 CVR 231 359 9.7 51
Show 20498+3900 MLB 983 191 3.8 52
Show 20434+4001 BRT2272 285 5.1 52
Show 20461+3824 ALI 949 313 11.9 53
Show 20453+4010 COU2293 201 1.1 54
Show 20454+4011 TDT2518 203 0.7 55
Show 20484+4002 SEI1255 AB 338 24.4 56
Show 20410+3905 MCA 62 Aa,Ab 276 0.1 56
Show 20410+3905 HJ 612 AB 9 48.9 56
Show 20484+4002 J 1237 BC 355 5.6 56
Show 20486+4000 TOB 198 96 21.0 57
Show 20419+3953 SEI1222 77 25.4 58
Show 20416+3950 COU2290 43 0.5 58
Show 20456+4014 TDT2519 347 1.3 59
Show 20419+3956 SEI1221 254 2.0 59
Show 20510+3915 SEI1279 AB 147 12.9 63
Show 20510+3915 SEI1279 BC 189 7.3 63
Show 20466+4020 ES 1982 301 3.9 65

 
 
WDS 20457+3917 : COMPONENTS
 
 
  A
B pa=316.0°
sep=6.14"
 
 
20457+3917 A
 
 
Componente originario normalizzato AB Coord arcsec 2000 204539.29+391620.6 Mag 11.3 PmRA 4.00
PmDE -4.0 Tycho2 3166-00174-2
Tycho2
Tycho2 3166-00174-2 Pflag RAmdeg 311.41369877 DEmdeg 39.27240277
PmRA 2.2 PmDE -2.3 E RAmdeg 41 E DEmdeg 39
E pmRA 2.1 E pmDE 2.0 EpRAm 1986.82 EpDEm 1986.84
Num 4 Q RAmdeg 0.8 Q DEmdeg 0.6 Q pmRA 0.8
Q pmDE 0.6 BTmag 11.632 E BTmag 0.061 VTmag 11.299
E VTmag 0.073 Prox 70 TYC T HIP
CCDM RAdeg 311.41369167 DEdeg 39.27240750 EpRA 1990 1.69
EpDE 1990 1.73 E RAdeg 42.3 E DEdeg 40.1 Posflg
Corr 0.0
 
 
20457+3917 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204538.92+391625.0 Mag 11.48 PmRA 3.00
PmDE -4.0 Tycho2 3166-00174-1 Calc delta mag 0.18 Calc coord yes
Tycho2
Tycho2 3166-00174-1 Pflag RAmdeg 311.41171727 DEmdeg 39.27358090
PmRA 2.3 PmDE -4.6 E RAmdeg 49 E DEmdeg 46
E pmRA 2.3 E pmDE 2.2 EpRAm 1985.78 EpDEm 1985.83
Num 4 Q RAmdeg 1.6 Q DEmdeg 1.6 Q pmRA 1.6
Q pmDE 1.6 BTmag 11.890 E BTmag 0.077 VTmag 11.475
E VTmag 0.086 Prox 70 TYC T HIP
CCDM RAdeg 311.41170889 DEdeg 39.27359028 EpRA 1990 1.71
EpDE 1990 1.73 E RAdeg 51.2 E DEdeg 47.9 Posflg
Corr 0.0