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Current system
20490+2540
HDS 2966
HD 198366


Nearby doubles
4' : 20490+2544
J 3111

7' : 20485+2540
TDT2553

13' : 20497+2535
J 3112

15' : 20499+2547
GRV 386

18' : 20497+2526
POU5028

24' : 20487+2517
POU5015

25' : 20495+2516
POU5025

27' : 20478+2519
BUP 218AB

27' : 20507+2527
POU5042

27' : 20483+2515
POU5004

28' : 20507+2525
BKO 876

28' : 20501+2604
HL 9002

29' : 20503+2518
POU5040

30' : 20492+2510
POU5021

31' : 20471+2525
BU 364

32' : 20491+2509
BKO 865

32' : 20501+2512
POU5038

33' : 20499+2510
POU5029

33' : 20500+2508
BKO 874

34' : 20487+2507
BKO 862

34' : 20482+2508
POU5003

34' : 20499+2508
POU5030

35' : 20506+2512
POU5041

35' : 20515+2533
COU 829

36' : 20497+2507
BKO 868

36' : 20492+2504
POU5020



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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20490+2540 HDS 2966 (HD 198366)

 
 
20h 48m 59.70s +25° 40' 20.7" P.A. 229.00 sep 0.5 mag 8.00,11.56 Sp B9 dist. 340.14 pc (1109.54 l.y.)
 
 
Coord 2000 20490+2540 Discov num HDS2966 Comp Coord arcsec 2000 20 48 59.70 +25 40 20.7
Date first 1991 Date last 2016 Obs 4
Pa first 226 Pa last 229.4 P.A. Now (θ) 229.4°
Sep first 0.5 Sep last 0.518 Sep. Now (ρ) 0.518"
Mag pri 8.00 Mag sec 11.56 delta mag (ΔM) 3.56 Spectral class B9 (blue-white)
Pri motion ra +017 Sec motion ra
Pri motion dec +008 Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 198366 Constellation Vulpecula SAO 89161 HIP 102728
Tycho2 2175-01805-1 Gaia DR2 1843793622967665408 HD 198366 BD BD+25 4383
Distance 340.14 Distance ly 1109.54
 
 
WDS 20490+2540 HDS 2966 (HD 198366) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
HDS Hipparcos Double Star (from additional DD list) ...................
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20490+2540 HDS2966 1991 1 226 0.5 8.00 11.56 B9 D 204859.70+254020.7
20490+2540 HDS2966 2016 3 229 0.5 8.00 11.56 B9 204859.70+254020.7

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

 
 
WDS 20490+2540 HDS 2966 (HD 198366) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20490+2540 HDS 2966 (HD 198366) : MEASURES
 
 
No records found.

 
 
WDS 20490+2540 (HD 198366) : VIRTUAL EYEPIECE
 
 

20490+2540 HDS2966A mag 8 Sp B9 20490+2540 HDS2966B sep 0.5 P.A. 226.40 mag 11.56 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 20490+2540 (HD 198366) : ALADIN DSS IMAGE @ 20h 48m 59.70s +25° 40' 20.7"
 
 
 
 
WDS 20490+2540 HDS 2966 (HD 198366) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20490+2540 HDS2966 distance=0' 20490+2544 J 3111 distance=4' 20485+2540 TDT2553 distance=7' 20497+2535 J 3112 distance=13' 20499+2547 GRV 386 distance=15' 20497+2526 POU5028 distance=18' 20487+2517 POU5015 distance=24' 20495+2516 POU5025 distance=25' 20478+2519 WSI 49BE distance=26' 20478+2519 BKO 856FG distance=27' 20478+2519 BUP 218AB distance=27' 20478+2519 BUP 218AC distance=27' 20478+2519 BUP 218AD distance=27' 20478+2519 DAM 514AF distance=27' 20507+2527 POU5042 distance=27' 20483+2515 POU5004 distance=27' 20507+2525 BKO 876 distance=28' 20501+2604 HL 9002 distance=28' 20478+2519 POU4996DH distance=29' 20503+2518 POU5040 distance=29' 20492+2510 POU5021 distance=30' 20471+2525 BU 364 distance=31' 20491+2509 BKO 865 distance=32' 20501+2512 POU5038 distance=32' 20499+2510 POU5029 distance=33' 20500+2508 BKO 874 distance=33' 20487+2507 BKO 862 distance=34' 20482+2508 POU5003 distance=34' 20499+2508 POU5030 distance=34' 20506+2512 POU5041 distance=35' 20515+2533 COU 829 distance=35' 20497+2507 BKO 868 distance=36' 20492+2504 POU5020 distance=36' 20490+2504 BKO 864 distance=37' 20503+2507 POU5039 distance=38' 20480+2504 POU5001 distance=39' 20462+2526 POU4974 distance=40' 20485+2501 POU5008 distance=41' 20513+2511 POU5045 distance=43' 20482+2622 COU 827Aa,Ab distance=43' 20482+2622 TDT2548AB distance=43' 20474+2502 POU4992 distance=44' 20482+2624 STF2728AB distance=45' 20482+2624 STF2728AC distance=45' 20482+2624 FYM 66AF distance=45' 20482+2624 FYM 66AD distance=45' 20482+2624 FYM 66AE distance=45' 20482+2624 FYM 66EF distance=46' 20499+2456 BKO 870 distance=47' 20507+2621 KPP3362 distance=47' 20462+2513 POU4972 distance=47' 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 20490+2540 HDS2966 229 0.5
Show 20490+2544 J 3111 138 6.3 4
Show 20485+2540 TDT2553 347 0.6 7
Show 20497+2535 J 3112 75 5.8 13
Show 20499+2547 GRV 386 200 14.5 15
Show 20497+2526 POU5028 336 14.8 18
Show 20487+2517 POU5015 78 14.6 24
Show 20495+2516 POU5025 80 8.6 25
Show 20478+2519 WSI 49 BE 141 5.1 26
Show 20478+2519 BKO 856 FG 178 9.1 27
Show 20478+2519 BUP 218 AB 37 49.4 27
Show 20478+2519 BUP 218 AC 99 102.9 27
Show 20478+2519 BUP 218 AD 252 154.0 27
Show 20478+2519 DAM 514 AF 100 44.2 27
Show 20507+2527 POU5042 344 7.4 27
Show 20483+2515 POU5004 324 15.0 27
Show 20507+2525 BKO 876 65 8.2 28
Show 20501+2604 HL 9002 138 16.0 28
Show 20478+2519 POU4996 DH 127 12.0 29
Show 20503+2518 POU5040 290 18.9 29
Show 20492+2510 POU5021 355 6.0 30
Show 20471+2525 BU 364 75 0.7 31
Show 20491+2509 BKO 865 101 8.9 32
Show 20501+2512 POU5038 342 16.2 32
Show 20499+2510 POU5029 20 12.3 33
Show 20500+2508 BKO 874 254 12.5 33
Show 20487+2507 BKO 862 55 7.9 34
Show 20482+2508 POU5003 208 14.4 34
Show 20499+2508 POU5030 343 4.5 34
Show 20506+2512 POU5041 177 14.2 35
Show 20515+2533 COU 829 218 2.3 35
Show 20497+2507 BKO 868 276 9.7 36
Show 20492+2504 POU5020 68 4.0 36
Show 20490+2504 BKO 864 313 9.1 37
Show 20503+2507 POU5039 84 10.8 38
Show 20480+2504 POU5001 197 7.7 39
Show 20462+2526 POU4974 106 17.3 40
Show 20485+2501 POU5008 312 7.8 41
Show 20513+2511 POU5045 314 13.7 43
Show 20482+2622 COU 827 Aa,Ab 332 0.6 43
Show 20482+2622 TDT2548 AB 148 0.6 43
Show 20474+2502 POU4992 336 17.8 44
Show 20482+2624 STF2728 AB 25 10.5 45
Show 20482+2624 STF2728 AC 213 19.4 45
Show 20482+2624 FYM 66 AF 295 129.1 45
Show 20482+2624 FYM 66 AD 193 59.8 45
Show 20482+2624 FYM 66 AE 294 114.1 45
Show 20482+2624 FYM 66 EF 301 15.1 46
Show 20499+2456 BKO 870 235 8.3 47
Show 20507+2621 KPP3362 277 3.9 47
Show 20462+2513 POU4972 279 13.8 47

 
 
WDS 20490+2540 : COMPONENTS
 
 
  A
B pa=226.4°
sep=0.49"
 
 
20490+2540 A
 
 
Componente originario normalizzato AB Name HD 198366 Coord arcsec 2000 204859.70+254020.7 Mag 8
Spectral class B9 (blue-white) PmRA 17.00 PmDE 8.0 SAO 89161
HIP 102728 Tycho2 2175-01805-1 HD 198366 BD BD+25 4383
Tycho2
Tycho2 2175-01805-1 Pflag RAmdeg 312.24881417 DEmdeg 25.67242663
PmRA 21.0 PmDE 9.8 E RAmdeg 5 E DEmdeg 5
E pmRA 1.4 E pmDE 1.3 EpRAm 1991.22 EpDEm 1991.23
Num 9 Q RAmdeg 0.6 Q DEmdeg 0.8 Q pmRA 0.7
Q pmDE 0.8 BTmag 7.942 E BTmag 0.016 VTmag 7.903
E VTmag 0.012 Prox 725 TYC T HIP 102728
CCDM AB RAdeg 312.24875944 DEdeg 25.67240361 EpRA 1990 1.50
EpDE 1990 1.52 E RAdeg 5.1 E DEdeg 5.3 Posflg P
Corr 0.1
SAO
SAO 89161 DelFlag RA1950 PmRA1950 0.0006
DE1950 PmDE1950 0.002 Vmag 8.1 SpType B9
Double code Source 35 CatNum 7950 DM BD+25 4383
DMcomp BDsup HD 198366 M HD 0
GC RA1950rad 5.44030851 DE1950rad 0.44481599 PmRA2000 0.0007
PmDE2000 -0.002
Hipparcos
Catalog H HIP 102728 Proxy H RAhms 20 48 59.70
DEdms +25 40 20.7 Vmag 7.94 VarFlag R Vmag G
RAdeg 312.249 DEdeg 25.6724 AstroRef A Plx 3.19
CCDM 20490+2540 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source Qual B M HIP AB
Theta 226 Rho 0.539 HD 198366 BD BD+25 4383
CD CP Dm number +25 4383 VIred 0.06
SpType B9 R SpType Coord arcsec 2000 204859.70+254020.7
Hipparcos 2
HIP 102728 Sn 15 So 3 Nc 2
RArad 5.4497690018 DErad 0.4480680214 Plx 2.94 PmRA 17.02
PmDE 7.8 E RArad 0.49 E DErad 0.49 E Plx 0.81
E pmRA 0.58 E pmDE 0.51 Hpmag 7.9594 E Hpmag 0.0016
SHp 0.013 VA 0 BV 0.04 E BV 0.015
VI 0.06
CCDM
Ccdm 20490+2540 RComp Comp A Note1
Note2 Discov num DRAs -0.29 DDEs 20.7
R dRAs 82 Year Theta Rho
Obs 2 Vmag 8.0 Sp B9 PmNote *
PmRA 17 PmDE 8 Dm number +25 4383 Cat1 BD
Name2 +25 2457 Cat2 AGK2/3 HD 198366 M HD
ADS BDS M ADS BDS N IDS IDS
HIC 102728
 
 
20490+2540 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204859.67+254020.4 Mag 11.56 Calc delta mag 3.56
Calc coord yes
CCDM
Ccdm 20490+2540 RComp Comp B Note1
Note2 Discov num HDS DRAs -0.32 DDEs 20.4
R dRAs 82 Year 1991 Theta 226 Rho 0.5
Obs 1 Vmag 11.6 Sp PmNote *
PmRA 17 PmDE 8 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 102728