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Doubles in session


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



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.
 
 
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