18217+0521 TDS 918 (HD 168853)

18^h 21^m 44.74^s +05° 20' 38.5" P.A. 138.00 sep 1.3 mag 9.71,11.23 Sp A0

Coord 2000	18217+0521	Discov num	TDS 918	Comp		Coord arcsec 2000	18 21 44.74 +05 20 38.5
Date first	1991	Date last	2015	Obs	3
Pa first	137	Pa last	138.2	P.A. Now (θ)	138.2°
Sep first	1.2	Sep last	1.253	Sep. Now (ρ)	1.253"
Mag pri	9.71	Mag sec	11.23	delta mag (ΔM)	1.52	Spectral class	A0 (white)
Pri motion ra	-001	Sec motion ra	-001
Pri motion dec	-004	Sec motion dec	-004
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 168853		Constellation	Serpens		Tycho2	0440-03694-1		Gaia DR2	4476659157261692160
HD	168853

WDS 18217+0521 TDS 918 (HD 168853) : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
TDS		Tycho Double Star (from additional DD list)	...................
TDT		Tycho 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
18217+0521	TDS 918		1991	1	137	1.2	9.71	11.23			182144.74+052038.5
18217+0521	TDS 918		2015	2	138	1.3	9.71	11.23	A0		182144.74+052038.5

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WDS 18217+0521 TDS 918 (HD 168853) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18217+0521 TDS 918 (HD 168853) : MEASURES

No records found.

WDS 18217+0521 (HD 168853) : VIRTUAL EYEPIECE

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WDS 18217+0521 (HD 168853) : ALADIN DSS IMAGE @ 18^h 21^m 44.74^s +05° 20' 38.5"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18217+0521 TDS 918 (HD 168853) : 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		18217+0521	TDS 918		138	1.3	1
Show		18236+0525	TDT 829		158	0.6	28
Show		18239+0527	SLE 167	AB	244	13.6	33
Show		18239+0527	SLE 167	AC	325	17.0	33
Show		18225+0446	SLE 161		266	12.9	36
Show		18241+0535	SLE 169	AB	343	12.0	39
Show		18241+0535	SLE 169	AC	351	30.8	39
Show		18241+0552	TDT 834		16	1.6	47
Show		18188+0501	TDS 914		354	0.8	49
Show		18213+0609	SKF2551		283	23.2	49
Show		18234+0432	SLE 164		34	9.6	54
Show		18253+0529	SLE 172		256	4.9	55
Show		18249+0454	J 2129	AB	117	12.7	55
Show		18249+0454	J 2129	AC	2	7.0	55
Show		18254+0523	SLE 173		133	19.0	55
Show		18234+0431	BAL2927		206	2.4	55
Show		18227+0614	SLE 162		142	20.9	55
Show		18227+0420	TDT 825		343	0.6	62
Show		18259+0541	J 2130		328	6.8	65
Show		18182+0557	HJ 2830		94	11.4	66
Show		18237+0624	TDT 830		276	0.7	70
Show		18170+0454	BAL2926		191	10.7	75
Show		18262+0602	TDT 865		1	2.1	78
Show		18250+0625	TDT 846		297	0.6	81
Show		18262+0435	TDT 866		274	0.5	81
Show		18233+0403	CLZ 73		9	79.0	81
Show		18186+0402	HEI 897		256	1.1	92
Show		18254+0637	TDT 854		17	2.8	94
Show		18258+0409	RAO 607		181	3.6	94
Show		18162+0434	STTA167		73	53.0	95
Show		18184+0358	BAR 45	AB	257	1.1	97
Show		18184+0358	BAR 45	AC	356	41.7	97
Show		18266+0627	GCB 31		75	4.5	98
Show		18283+0537	TDT 897		169	0.5	100
Show		18269+0625	STT 350	AB	166	1.9	101
Show		18269+0625	CAT 3	AC	133	1.4	101
Show		18155+0441	BAL2924		222	19.9	101
Show		18226+0701	TDT 823		141	0.5	101
Show		18152+0533	J 2123	AB	138	4.0	101
Show		18152+0533	J 2123	AC	52	7.0	101
Show		18266+0632	SCJ 17		351	51.0	101
Show		18159+0430	BAL2925	AB	223	8.3	102
Show		18159+0430	J 2670	AC	70	29.0	102
Show		18243+0347	BAL2490		289	19.2	102
Show		18246+0653	SLE 341		98	23.7	102
Show		18258+0359	J 462		347	4.1	102
Show		18248+0350	BAL2491		79	6.9	102
Show		18266+0633	HDS2607		243	0.2	103
Show		18252+0650	TDT 849		331	1.6	104
Show		18151+0448	BAL2923		17	16.1	104
Show		18286+0451	STTA168	AB	161	47.2	107

WDS 18217+0521 : COMPONENTS

	A
B	pa=138.3° sep=1.25"

18217+0521 A

Componente originario normalizzato	AB	Name	HD 168853	Coord arcsec 2000	182144.74+052038.5	Mag	9.71
Spectral class	A0 (white)	PmRA	-1.00	PmDE	-4.0	Tycho2	0440-03694-1
HD	168853

Tycho2

Tycho2	0440-03694-1	Pflag	P	RAmdeg	275.43641054	DEmdeg	5.34402421
PmRA	-1.3	PmDE	-4.0	E RAmdeg	14	E DEmdeg	17
E pmRA	2.6	E pmDE	2.5	EpRAm	1991.44	EpDEm	1991.13
Num	3	Q RAmdeg	0.9	Q DEmdeg	0.1	Q pmRA	1.0
Q pmDE	0.1	BTmag	9.814	E BTmag	0.026	VTmag	9.713
E VTmag	0.030	Prox	12	TYC	T	HIP
CCDM		RAdeg	275.43639278	DEdeg	5.34405583	EpRA 1990	1.80
EpDE 1990	1.74	E RAdeg	14.1	E DEdeg	17.0	Posflg	D
Corr	0.2

18217+0521 B

Componente originario normalizzato	AB		Coord arcsec 2000	182144.80+052037.6		Mag	11.23		PmRA	-1.00
PmDE	-4.0		Tycho2	0440-03694-2		Calc delta mag	1.52		Calc coord	yes

Tycho2

Tycho2	0440-03694-2	Pflag	P	RAmdeg	275.43641054	DEmdeg	5.34402421
PmRA	-1.3	PmDE	-4.0	E RAmdeg	14	E DEmdeg	17
E pmRA	2.6	E pmDE	2.5	EpRAm	1991.44	EpDEm	1991.13
Num	3	Q RAmdeg	0.9	Q DEmdeg	0.1	Q pmRA	1.0
Q pmDE	0.1	BTmag	11.699	E BTmag	0.091	VTmag	11.227
E VTmag	0.106	Prox	12	TYC		HIP
CCDM		RAdeg	275.43662944	DEdeg	5.34380361	EpRA 1990	1.80
EpDE 1990	1.74	E RAdeg	67.0	E DEdeg	82.0	Posflg	D
Corr	0.2