WDS 21023+2037 HDS 2998

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Doubles in session

Current system

21023+2037
HDS 2998

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

WDS 21023+2037 : COMPONENTS

	A
B	pa=130.4° sep=0.10"

21023+2037 A

Coord arcsec 2000	210215.34+203726.2		Mag	10.24		Spectral class	K0 (yellow-orange)		PmRA	8.00
PmDE	-16.0		HIP	103817		BD	BD+20 4809

Hipparcos

Catalog	H		HIP	103817		Proxy	H		RAhms	21 02 15.34
DEdms	+20 37 26.2		Vmag	9.91		VarFlag			R Vmag	H
RAdeg	315.564		DEdeg	20.6239		AstroRef	*		Plx	-1.27
CCDM	7.69		N CCDM	H		Nsys	1		Ncomp	2
MultFlag	C		Source	S		Qual	C		M HIP	AB
Theta	173		Rho	0.13		HD			BD	BD+20 4809
CD			CP			Dm number	+20 4809		VIred	1.08
SpType	K0		R SpType			Coord arcsec 2000	210215.34+203726.2

Hipparcos 2

HIP	103817		Sn	55		So	3		Nc	2
RArad	5.5076293929		DErad	0.3599555028		Plx	0.86		PmRA	6.72
PmDE	-16.06		E RArad	1.22		E DErad	0.75		E Plx	1.71
E pmRA	1.42		E pmDE	0.75		Hpmag			E Hpmag	0.0022
SHp	0.027		VA	0		BV	1.114		E BV	0.218
VI	1.08

CCDM

Ccdm	21023+2037		RComp			Comp	A		Note1
Note2			Discov num			DRAs	-2.66		DDEs	26.0
R dRAs	82		Year			Theta			Rho
Obs	2		Vmag	10.2		Sp	K0		PmNote	*
PmRA	8		PmDE	-16		Dm number	+20 4809		Cat1	BD
Name2	+20 2366		Cat2	AGK2/3		HD			M HD
ADS BDS			M ADS BDS			N IDS			IDS
HIC	103817

21023+2037 B

Coord arcsec 2000

210215.35+203726.1

Mag

12.28

Delta magnitude

2.04

Coordinate calculated

yes

CCDM

Ccdm	21023+2037		RComp			Comp	B		Note1
Note2			Discov num	HDS		DRAs	-2.65		DDEs	25.9
R dRAs	82		Year	1991		Theta	173		Rho	0.1
Obs	1		Vmag	12.3		Sp			PmNote	*
PmRA	8		PmDE	-16		Dm number			Cat1
Name2			Cat2			HD			M HD
ADS BDS			M ADS BDS			N IDS			IDS
HIC	103817