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Current system
20177+3740
SLE 989


Nearby doubles
9' : 20171+3738
SLE 986AB

11' : 20169+3743
SLE 985

11' : 20185+3735
TDT2155

12' : 20176+3729
SLE 987

14' : 20168+3731
ARY 25

15' : 20165+3739
BU 442AB

17' : 20189+3730
TDT2160

18' : 20170+3725
A 1423AB

19' : 20168+3755
SLE 984

20' : 20162+3745
TOB 183

20' : 20191+3730
SLE 999

20' : 20161+3738
SLE 980

21' : 20193+3748
SLE1000

22' : 20178+3802
RBR 25

23' : 20189+3723
BKO 823

23' : 20166+3759
ALI 663

23' : 20183+3802
SLE 993

24' : 20160+3751
TDT2130

24' : 20197+3743
ES 2505

24' : 20187+3720
SLE 995

24' : 20182+3803
SLE 991

25' : 20195+3754
SLE1003

26' : 20176+3806
ES 2502

27' : 20191+3720
TDT2163

28' : 20160+3758
SEI1048

28' : 20187+3715
SLE 994



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

20177+3740 SLE 989

 
 
20h 17m 44.92s +37° 40' 30.3" P.A. 223.00 sep 8.9 mag 12.30,13.60
 
 
Coord 2000 20177+3740 Discov num SLE 989 Comp Coord arcsec 2000 20 17 44.92 +37 40 30.3
Date first 1985 Date last 2022 Obs 9
Pa first 218 Pa last 222.9 P.A. Now (θ) 222.9°
Sep first 9.0 Sep last 8.91 Sep. Now (ρ) 8.91"
Mag pri 12.30 Mag sec 13.60 delta mag (ΔM) 1.3 Spectral class
Pri motion ra -008 Sec motion ra -008
Pri motion dec -016 Sec motion dec -009
Notes R (Red magnitudes)
rPM=0.391
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus Gaia DR2 2060671432560497152
 
 
WDS 20177+3740 SLE 989 : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Sle1966 Mc j Soulie, G. 1966JO.....49..359S
Sle1966 +Pa J. Obs. 49, 359, 1966
Sle1983 Pa - Soulie, G. 1983A&AS...54..281S
Sle1983 A&AS 54, 281, 1983
Sle1984 Pa - Soulie, G. 1984A&AS...56..351S
Sle1984 A&AS 56, 351, 1984
Sle1985 Pa - Soulie, G. 1985A&AS...61...17S
Sle1985 A&AS 61, 17, 1985
Sle1986a Pa - Soulie, G. .
Sle1986a Bull. Inf. Cent. Donnes Stell. #30, 91, 1986
Sle1986b Pa - Soulie, G. .
Sle1986b Bull. Inf. Cent. Donnes Stell. #30, 103, 1986
Sle2003 C j Soulie, G. 2003O&T....56...10S
Sle2003 Obs. et Travaux 56, 10, 2003
Sle2006 Pa - Soulie, G. 2006O&T....62...26S
Sle2006 Obs. et Travaux 62, 26, 2006
Sle2006b Pa j Soulie, G. 2006O&T....63...15S
Sle2006b Obs. et Travaux 63, 15, 2006
Sle2007 C j Soulie, G. 2007O&T....65...34S
Sle2007 Obs. et Travaux 65, 34, 2007
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20177+3740 SLE 989 1998 2 222 9.4 11.90 12.50 D 201744.81+374024.5
20177+3740 SLE 989 2002 3 222 9.3 12.30 13.60 R 201744.92+374030.3
20177+3740 SLE 989 2015 4 223 9.1 12.30 13.60 R 201744.92+374030.3
20177+3740 SLE 989 2022 9 223 8.9 12.30 13.60 R 201744.92+374030.3

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

 
 
WDS 20177+3740 SLE 989 : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20177+3740 SLE 989 : MEASURES
 
 
No records found.

 
 
WDS 20177+3740 : VIRTUAL EYEPIECE
 
 

20177+3740 SLE 989A mag 12.3 20177+3740 SLE 989B sep 8.1 P.A. 216.30 mag 13.6 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 20177+3740 : ALADIN DSS IMAGE @ 20h 17m 44.92s +37° 40' 30.3"
 
 
 
 
WDS 20177+3740 SLE 989 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20177+3740 SLE 989 distance=1' 20171+3738 SLE 986AB distance=9' 20171+3738 SLE 986AC distance=9' 20169+3743 SLE 985 distance=11' 20185+3735 TDT2155 distance=11' 20176+3729 SLE 987 distance=12' 20168+3731 ARY 25 distance=14' 20165+3739 BU 442UV distance=15' 20165+3739 BU 442CD distance=15' 20165+3739 BU 442CU distance=15' 20165+3739 BU 442CV distance=15' 20165+3739 BU 442BC distance=15' 20165+3739 BU 442BD distance=15' 20165+3739 ABH 135BE distance=15' 20165+3739 ABH 135BF distance=15' 20165+3739 ABH 135BO distance=15' 20165+3739 BU 442BP distance=15' 20165+3739 BU 442BR distance=15' 20165+3739 BU 442BS distance=15' 20165+3739 BU 442BT distance=15' 20165+3739 BU 442BU distance=15' 20165+3739 BU 442BV distance=15' 20165+3739 BU 442AB distance=15' 20165+3739 SLE 982AG distance=15' 20165+3739 SLE 982AH distance=15' 20165+3739 SLE 982AI distance=15' 20165+3739 SLE 982AJ distance=15' 20165+3739 SLE 982AK distance=15' 20165+3739 SLE 982AL distance=15' 20165+3739 SLE 982AM distance=15' 20165+3739 SLE 982AN distance=15' 20165+3739 BU 442AQ distance=15' 20165+3739 SLV 8AC distance=15' 20165+3739 BU 442AP distance=15' 20165+3739 BU 442AR distance=15' 20165+3739 ABH 135AD distance=15' 20165+3739 SLE 982AO distance=15' 20189+3730 TDT2160 distance=17' 20170+3725 HDS2891Aa,Ab distance=18' 20170+3725 A 1423AB distance=18' 20170+3725 CIA 9Aa1,2 distance=18' 20168+3755 SLE 984 distance=19' 20162+3745 TOB 183 distance=20' 20191+3730 SLE 999 distance=20' 20161+3738 SLE 980 distance=20' 20193+3748 SLE1000 distance=21' 20178+3802 RBR 25 distance=22' 20189+3723 BKO 823 distance=23' 20166+3759 ALI 663 distance=23' 20183+3802 SLE 993 distance=23' 20160+3751 TDT2130 distance=24' 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 20177+3740 SLE 989 223 8.9 1
Show 20171+3738 SLE 986 AB 347 6.4 9
Show 20171+3738 SLE 986 AC 1 17.9 9
Show 20169+3743 SLE 985 186 14.1 11
Show 20185+3735 TDT2155 125 0.6 11
Show 20176+3729 SLE 987 208 11.1 12
Show 20168+3731 ARY 25 293 147.1 14
Show 20165+3739 BU 442 UV 127 8.0 15
Show 20165+3739 BU 442 CD 306 15.1 15
Show 20165+3739 BU 442 CU 109 12.7 15
Show 20165+3739 BU 442 CV 116 20.4 15
Show 20165+3739 BU 442 BC 49 16.9 15
Show 20165+3739 BU 442 BD 2 20.1 15
Show 20165+3739 ABH 135 BE 88 50.2 15
Show 20165+3739 ABH 135 BF 139 64.4 15
Show 20165+3739 ABH 135 BO 125 41.5 15
Show 20165+3739 BU 442 BP 269 16.6 15
Show 20165+3739 BU 442 BR 308 34.4 15
Show 20165+3739 BU 442 BS 124 3.7 15
Show 20165+3739 BU 442 BT 162 6.5 15
Show 20165+3739 BU 442 BU 74 26.0 15
Show 20165+3739 BU 442 BV 86 31.3 15
Show 20165+3739 BU 442 AB 103 18.3 15
Show 20165+3739 SLE 982 AG 10 88.5 15
Show 20165+3739 SLE 982 AH 19 111.6 15
Show 20165+3739 SLE 982 AI 43 63.2 15
Show 20165+3739 SLE 982 AJ 34 96.5 15
Show 20165+3739 SLE 982 AK 34 114.9 15
Show 20165+3739 SLE 982 AL 27 177.3 15
Show 20165+3739 SLE 982 AM 65 88.9 15
Show 20165+3739 SLE 982 AN 76 155.9 15
Show 20165+3739 BU 442 AQ 156 8.7 15
Show 20165+3739 SLV 8 AC 77 31.4 15
Show 20165+3739 BU 442 AP 155 4.7 15
Show 20165+3739 BU 442 AR 332 19.2 15
Show 20165+3739 ABH 135 AD 49 24.4 15
Show 20165+3739 SLE 982 AO 118 58.7 15
Show 20189+3730 TDT2160 274 6.0 17
Show 20170+3725 HDS2891 Aa,Ab 55 0.9 18
Show 20170+3725 A 1423 AB 128 4.4 18
Show 20170+3725 CIA 9 Aa1,2 305 0.0 18
Show 20168+3755 SLE 984 175 8.2 19
Show 20162+3745 TOB 183 256 14.7 20
Show 20191+3730 SLE 999 168 10.7 20
Show 20161+3738 SLE 980 226 14.2 20
Show 20193+3748 SLE1000 240 12.1 21
Show 20178+3802 RBR 25 107 11.4 22
Show 20189+3723 BKO 823 201 6.4 23
Show 20166+3759 ALI 663 58 12.0 23
Show 20183+3802 SLE 993 70 16.4 23
Show 20160+3751 TDT2130 236 2.0 24

 
 
WDS 20177+3740 : COMPONENTS
 
 
  A
B pa=216.3°
sep=8.10"
 
 
20177+3740 A
 
 
Componente originario normalizzato AB Coord arcsec 2000 201744.92+374030.3 Mag 12.3 PmRA -8.00
PmDE -16.0
 
 
20177+3740 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 201744.52+374023.8 Mag 13.6 PmRA -8.00
PmDE -9.0 Calc delta mag 1.3 Calc coord yes