21477-1813 CHR 223 (HD 207208)

21^h 47^m 44.82^s -18° 12' 46.9" P.A. 269.00 sep 0.1 mag 7.60,9.30 Sp A5IV dist. 139.86 pc (456.22 l.y.)

Coord 2000	21477-1813	Discov num	CHR 223	Comp		Coord arcsec 2000	21 47 44.82 -18 12 46.9
Date first	1994	Date last	2020	Obs	7
Pa first	334	Pa last	269.1	P.A. Now (θ)	269.1°
Sep first	0.1	Sep last	0.087	Sep. Now (ρ)	0.087"
Mag pri	7.60	Mag sec	9.30	delta mag (ΔM)	1.7	Spectral class	A5IV (white)
Pri motion ra	+030	Sec motion ra
Pri motion dec	+006	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 207208	Constellation	Capricornus	SAO	164657	HIP	107610
Tycho2	6367-01126-1	Gaia DR2	6836687057251744000	HD	207208	BD	BD-18 6013
Distance	139.86	Distance ly	456.22

ORBITAL ELEMENTS

Period (P)	73.829y	Periastron (T)	2025.728y	Semi-major axis (a)	0.1713a
Eccentricity (e)	0.311	Inclination (i)	109.9°	Longitude of periastron (ω)	275.3°
Node (Ω)	110.9°	Notes	n	Reference	Tok2020e
Equinox		Last observation	2019	Grade	4	(1=Definitive, 9=Indet.)

label	theta	rho
2000	315.4	0.139
2001	313.1	0.144
2002	310.9	0.149
2003	308.9	0.154
2004	307.0	0.158
2005	305.2	0.162
2006	303.4	0.165
2007	301.7	0.167
2008	300.1	0.168
2009	298.5	0.169
2010	296.8	0.169
2011	295.2	0.167
2012	293.5	0.165
2013	291.8	0.162
2014	290.0	0.157
2015	288.0	0.151
2016	285.9	0.143
2017	283.5	0.134
2018	280.7	0.124
2019	277.4	0.113
2020	273.3	0.100
2021	267.9	0.086
2022	260.4	0.072
2023	249.2	0.058
2024	231.7	0.046
2025	206.2	0.040
2026	178.6	0.043
2027	157.8	0.053
2028	144.4	0.066
2029	135.6	0.080
2030	129.5	0.094

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS 21477-1813 CHR 223 (HD 207208) : NOTES

discov_num	notes	refcode
CHR 223	First detected as an occultation binary by Evans et al.	Evn1985

REFERENCES

refcode	metd	author	reference
Evn1985	O j	Evans, D.S., Edwards, D., Frueh, M., McWilliam, A. & Sandmann, W.	1985AJ.....90.2360E
Evn1985		AJ 90, 2360, 1985
Tok2020e	St j	Tokovinin, A., Mason, B.D., Mendez, R.A., Costa, E. & Horch, E.P.	2020AJ....160....7T
Tok2020e	+orb	AJ 160, 7, 2020

DISCOVERER

idgroup	discov	author
1	CHR	Center for High Ang. Res. Astronomy (speckle interferometry systems)

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21477-1813	CHR 223		1994	1	334	0.1	7.60	9.30	A5IV	N D	214744.82-181246.9
21477-1813	CHR 223		2006	2	297	0.2	7.60	9.30	A5IV	N D	214744.82-181246.9
21477-1813	CHR 223		2007	3	300	0.2	7.60	9.30	A5IV	N D	214744.82-181246.9
21477-1813	CHR 223		2014	4	288	0.2	7.60	9.30	A5IV	NO	214744.82-181246.9
21477-1813	CHR 223		2018	5	280	0.1	7.60	9.30	A5IV	NO	214744.82-181246.9
21477-1813	CHR 223		2019	6	277	0.1	7.60	9.30	A5IV	NO	214744.82-181246.9
21477-1813	CHR 223		2020	7	269	0.1	7.60	9.30	A5IV	NO	214744.82-181246.9

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

WDS 21477-1813 CHR 223 (HD 207208) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21477-1813 CHR 223 (HD 207208) : MEASURES

No records found.

WDS 21477-1813 (HD 207208) : VIRTUAL EYEPIECE

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

WDS 21477-1813 (HD 207208) : ALADIN DSS IMAGE @ 21^h 47^m 44.82^s -18° 12' 46.9"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21477-1813 CHR 223 (HD 207208) : 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		21477-1813	CHR 223		269	0.1
Show		21481-1755	UC 4568		16	18.8	19
Show		21459-1759	RST3289		65	1.6	31
Show		21460-1748	GWP3092		312	17.5	36
Show		21503-1812	UC 4579		170	60.3	36
Show		21502-1738	LDS4914		22	39.3	50
Show		21476-1718	BU 1036		208	4.7	56
Show		21438-1843	WIS 352		347	635.6	65
Show		21531-1831	ARA 504		35	5.6	79
Show		21498-1653	GWP3098		139	10.5	86
Show		21416-1759	UC 4528		304	45.2	90
Show		21469-1948	RST3290		180	1.7	96
Show		21411-1844	HDS3087		162	1.2	100
Show		21416-1907	UC 4529		171	54.7	103
Show		21404-1815	DON1014		17	0.1	106
Show		21432-1937	OCC9199		-1	0.0	107
Show		21483-1959	BHA 46		242	4.6	108
Show		21402-1826	COO 243		65	5.0	109
Show		21401-1757	LDS6357		44	8.3	110
Show		21406-1854	OCC9197		-1	0.0	110
Show		21503-1629	RST3291		122	1.5	111
Show		21514-1635	UC 4581		17	23.5	112
Show		21451-2002	TOI2311		131	0.2	116
Show		21537-1645	OCC 657	Aa,Ab	-1	0.1	123
Show		21537-1645	HJ 615	AB	66	12.5	123
Show		21559-1738	LDS4925		165	3.5	123
Show	Deneb Algedi	21470-1608	HJ 3056	AB	60	49.9	126
Show	Deneb Algedi	21470-1608	HJ 3056	AC	304	153.6	126
Show		21491-1608	RST5165		72	2.6	127
Show		21480-2022	ARA1229		63	13.4	130
Show		21529-2001	B 542		304	0.6	131
Show		21395-1913	HJ 3043		150	34.8	132
Show		21538-2000	BU 168	AD	136	39.8	138
Show		21538-2000	BU 168	A,BC	73	5.5	138
Show		21538-2000	HU 380	BC	247	0.4	138
Show		21562-1656	UC 4604		10	26.6	143
Show		21577-1827	HJ 3070		284	30.4	143
Show		21529-1609	NSN 495		181	1.5	144
Show		21578-1747	WIS 357		219	999.9	147
Show		21508-2032	SEE 460		166	0.5	147
Show		21430-2025	SEE 456		59	3.3	149
Show		21380-1913	LDS 751		355	18.9	152
Show		21551-2003	UC 4597		249	21.3	152
Show		21475-2046	HU 377	AB	136	0.5	153
Show		21475-2046	HU 377	AB,C	341	4.7	153
Show		21584-1834	SEE 463		120	15.7	154
Show		21432-1553	UC 4537		116	34.9	155
Show		21543-2020	BVD 140		256	35.9	158
Show		21429-1551	ARA 130		50	8.7	159
Show		21526-1548	HJ 5298	AB	319	66.9	161
Show		21526-1548	BUP9004	AC	322	26.4	161

WDS 21477-1813 : COMPONENTS

	A
B	pa=269.1° sep=0.08"

21477-1813 A

Componente originario normalizzato	AB	Name	HD 207208	Coord arcsec 2000	214744.82-181246.9	Mag	7.6
Spectral class	A5IV (white)	PmRA	30.00	PmDE	6.0	SAO	164657
HIP	107610	Tycho2	6367-01126-1	HD	207208	BD	BD-18 6013

Tycho2

Tycho2	6367-01126-1	Pflag		RAmdeg	326.93683992	DEmdeg	-18.21301332
PmRA	29.6	PmDE	6.0	E RAmdeg	5	E DEmdeg	6
E pmRA	0.9	E pmDE	0.9	EpRAm	1991.07	EpDEm	1990.60
Num	16	Q RAmdeg	0.6	Q DEmdeg	0.5	Q pmRA	0.6
Q pmDE	0.7	BTmag	7.686	E BTmag	0.016	VTmag	7.433
E VTmag	0.011	Prox	999	TYC	T	HIP	107610
CCDM		RAdeg	326.93676806	DEdeg	-18.21302750	EpRA 1990	1.71
EpDE 1990	1.48	E RAdeg	4.6	E DEdeg	5.5	Posflg
Corr	-0.1

SAO

SAO	164657	DelFlag		RA1950		PmRA1950	0.0025
DE1950		PmDE1950	0.01	Vmag	7.5	SpType	A3
Double code		Source	22	CatNum	9308	DM	BD-18 6013
DMcomp		BDsup		HD	207208	M HD	0
GC		RA1950rad	5.69404739	DE1950rad	-0.32193553	PmRA2000	0.0026
PmDE2000	0.007

Hipparcos

Catalog	H	HIP	107610	Proxy		RAhms	21 47 44.82
DEdms	-18 12 46.9	Vmag	7.4	VarFlag		R Vmag	H
RAdeg	326.937	DEdeg	-18.213	AstroRef		Plx	8.17
CCDM		N CCDM		Nsys		Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD	207208	BD	BD-18 6013
CD		CP		Dm number	-18 6013	VIred	0.22
SpType	A5IV	R SpType		Coord arcsec 2000	214744.82-181246.9

Hipparcos 2

HIP	107610	Sn	5	So	0	Nc	1
RArad	5.7061229681	DErad	-0.3178773301	Plx	7.15	PmRA	33.73
PmDE	4.22	E RArad	0.53	E DErad	0.39	E Plx	0.6
E pmRA	0.76	E pmDE	0.45	Hpmag	7.4704	E Hpmag	0.0013
SHp	0.008	VA	0	BV	0.233	E BV	0.013
VI	0.26

21477-1813 B

Componente originario normalizzato	AB		Coord arcsec 2000	214744.81-181246.9		Mag	9.3		Calc delta mag	1.7
Calc coord	yes