21085+5603 PET 1 (HD 239581)

21^h 08^m 27.65^s +56° 02' 43.2" P.A. 343.00 sep 0.2 mag 7.70,11.00 Sp B2V dist. 704.23 pc (2297.2 l.y.)

Coord 2000	21085+5603	Discov num	PET 1	Comp		Coord arcsec 2000	21 08 27.65 +56 02 43.2
Date first	2007	Date last	2007	Obs	1
Pa first	343	Pa last	343	P.A. Now (θ)	343°
Sep first	0.2	Sep last	0.15	Sep. Now (ρ)	0.15"
Mag pri	7.70	Mag sec	11.00	delta mag (ΔM)	3.3	Spectral class	B2V (blue-white)
Pri motion ra	-002	Sec motion ra
Pri motion dec	-004	Sec motion dec
Notes	R (Red magnitudes)

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 239581	Constellation	Cepheus	SAO	33168	HIP	104356
Tycho2	3957-01726-1	Gaia DR2	2189315396815957376	HD	239581	BD	BD+55 2530
Distance	704.23	Distance ly	2297.2

WDS 21085+5603 PET 1 (HD 239581) : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Pet2012	Cl j	Peter, D., Feldt, M., Henning, Th., & Hormuth, F.	2012A&A...538A..74P
Pet2012		A&A 538, A74, 2012
Pet2012		[Note: Observing dates 11-14 Aug 2007 (Peter, private comm.)]

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21085+5603	PET 1		2007	1	343	0.2	7.95		B2V		210827.65+560243.2

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WDS 21085+5603 PET 1 (HD 239581) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21085+5603 PET 1 (HD 239581) : MEASURES

No records found.

WDS 21085+5603 (HD 239581) : VIRTUAL EYEPIECE

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Pass over with the mouse cursor to display the catalog designation.

WDS 21085+5603 (HD 239581) : ALADIN DSS IMAGE @ 21^h 08^m 27.65^s +56° 02' 43.2"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21085+5603 PET 1 (HD 239581) : NEIGHBORHOODS

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Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		21085+5603	PET 1		343	0.2
Show		21067+5556	TDT2753		31	0.7	17
Show		21112+5620	DOO 16		29	1.1	29
Show		21062+5628	TDT2747		26	0.4	32
Show		21045+5558	KPP4223		236	1.9	34
Show		21090+5654	RAO 447		234	3.5	52
Show		21103+5512	BU 1500	AB	114	7.8	54
Show		21103+5512	HJ 1622	AC	296	12.8	54
Show		21096+5502	HJ 1621		148	19.4	62
Show		21031+5519	ES 1001		32	3.6	64
Show		21088+5459	CVR 239		190	93.9	64
Show		21021+5640	STF2751		356	1.6	65
Show		21152+5531	A 1692		167	0.3	66
Show		21106+5710	ES 1760		29	2.1	70
Show		21101+5715	STI2561		183	14.2	74
Show		21119+5713	TDT2813		359	0.5	77
Show		21147+5702	HJ 1630		133	17.4	79
Show		21019+5704	BU 1139		136	2.1	82
Show		20585+5539	A 1686		282	1.9	88
Show		21005+5709	STI2557		131	8.1	93
Show		21196+5552	MLR 582		348	0.9	96
Show		21166+5455	TDT2877		340	1.1	97
Show		21114+5737	MLR 590		7	0.2	98
Show		20599+5714	ES 136		159	4.2	101
Show		21092+5421	LEP 99		27	113.7	102
Show		21185+5505	ES 2707		348	10.3	103
Show		21060+5422	A 1691	Aa,Ab	201	0.4	103
Show		21060+5422	HJL1105	AB	346	172.7	103
Show		21165+5727	STI2562		77	11.2	108
Show		20567+5656	A 755		189	0.1	111
Show		21006+5432	HJ 1606	AB	184	18.7	114
Show		21006+5432	BU 1498	AC	336	54.3	114
Show		21006+5432	HJ 1605	AD	219	207.5	114
Show		21220+5631	CRB 210		341	12.9	117
Show		21006+5432	HJ 1605	DE	118	21.3	117
Show		21197+5455	A 1694		93	0.8	117
Show		21016+5422	A 1439	AB	250	4.4	117
Show		21016+5422	A 1439	AC	342	16.5	117
Show		21064+5405	TDT2750		262	0.9	119
Show		20567+5618	ROE 89		241	5.5	120
Show		20553+5651	A 752		8	1.2	120
Show		21200+5436	TDT2908	Aa,Ab	295	0.3	132
Show		21200+5436	SKF1978	AB	298	31.8	132
Show		21036+5358	HDS2999	Aa,Ab	352	0.3	132
Show		21036+5358	ES 2704	AB	97	54.4	132
Show		21225+5504	HJ 1642		210	35.9	134
Show		21040+5354	VLM 2		188	8.1	135
Show		21202+5433	TDT2909		77	0.6	135
Show		21203+5737	MLB 87		333	2.7	136
Show		21237+5518	A 1892		351	0.8	137
Show		21222+5453	A 1696		49	1.3	137

WDS 21085+5603 : COMPONENTS

	A
B	pa=350.3° sep=0.15"

21085+5603 A

Componente originario normalizzato	AB		Name	HD 239581		Coord arcsec 2000	210827.65+560243.2		Mag	7.7
Spectral class	B2V (blue-white)		PmRA	-2.00		PmDE	-4.0		Tycho2	3957-01726-1

Tycho2

Tycho2	3957-01726-1	Pflag		RAmdeg	317.11521080	DEmdeg	56.04534314
PmRA	-3.9	PmDE	-1.9	E RAmdeg	5	E DEmdeg	6
E pmRA	1.2	E pmDE	1.3	EpRAm	1991.26	EpDEm	1991.22
Num	11	Q RAmdeg	0.6	Q DEmdeg	1.2	Q pmRA	0.7
Q pmDE	1.2	BTmag	8.373	E BTmag	0.016	VTmag	7.971
E VTmag	0.011	Prox	999	TYC	T	HIP	104356
CCDM		RAdeg	317.11522694	DEdeg	56.04534750	EpRA 1990	1.64
EpDE 1990	1.69	E RAdeg	5.1	E DEdeg	5.5	Posflg
Corr	-0.1

21085+5603 B

Componente originario normalizzato	AB	Coord arcsec 2000	210827.65+560243.3	Mag	11	SAO	33168
HIP	104356	HD	239581	BD	BD+55 2530	Calc delta mag	3.3
Calc coord	yes

SAO

SAO	33168	DelFlag		RA1950		PmRA1950	0.0001
DE1950		PmDE1950	0.004	Vmag	7	SpType	B
Double code		Source	38	CatNum	11933	DM	BD+55 2530
DMcomp		BDsup		HD	239581	M HD	0
GC		RA1950rad	5.52842834	DE1950rad	0.97462775	PmRA2000	0.0005
PmDE2000	0.001

Hipparcos

Catalog	H	HIP	104356	Proxy		RAhms	21 08 27.65
DEdms	+56 02 43.3	Vmag	7.95	VarFlag		R Vmag	H
RAdeg	317.115	DEdeg	56.0453	AstroRef		Plx	2.02
CCDM		N CCDM		Nsys		Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD	239581	BD	BD+55 2530
CD		CP		Dm number	+55 2530	VIred	0.46
SpType	B2V	R SpType		Coord arcsec 2000	210827.65+560243.3

Hipparcos 2

HIP	104356	Sn	5	So	0	Nc	1
RArad	5.5347048232	DErad	0.9781758419	Plx	1.42	PmRA	-2.26
PmDE	-4.14	E RArad	0.46	E DErad	0.45	E Plx	0.54
E pmRA	0.5	E pmDE	0.48	Hpmag	8.0436	E Hpmag	0.001
SHp	0.011	VA	0	BV	0.39	E BV	0.015
VI	0.46