20251-4518 DON 985 (HD 193998)

20^h 25^m 03.82^s -45° 18' 16.6" P.A. 341.00 sep 1.8 mag 10.52,10.78 Sp F3V

Coord 2000	20251-4518	Discov num	DON 985	Comp		Coord arcsec 2000	20 25 03.82 -45 18 16.6
Date first	1929	Date last	2016	Obs	4
Pa first	340	Pa last	340.9	P.A. Now (θ)	340.9°
Sep first	1.4	Sep last	1.791	Sep. Now (ρ)	1.791"
Mag pri	10.52	Mag sec	10.78	delta mag (ΔM)	0.26	Spectral class	F3V (yellow-white)
Pri motion ra	+025	Sec motion ra	+025
Pri motion dec	-011	Sec motion dec	-011
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 193998		Constellation	Telescopium		SAO	230192		Tycho2	8405-01252-1
Gaia DR2	6675813598276945664		HD	193998		DM	CP-45 9930

WDS 20251-4518 DON 985 (HD 193998) : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Don1937	Ma j	Donner, H.F.	1937MmRAS..65...51R
Don1937		MemRAS 65, 51, 1937
Don1955	Ma -	Donner, H.F.	1955POMic..11....1R
Don1955		Pub. Univ. Michigan Obs. 11, 1, 1955
Don1964	Ma j	Donner, H.F.	1964POMic...9...73R
Don1964		Pub. Univ. Michigan Obs. 9, 73, 1964

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20251-4518	DON 985		1991	3	341	1.8	10.52	10.78	F3V		202503.82-451816.6
20251-4518	DON 985		2016	4	341	1.8	10.52	10.78	F3V		202503.82-451816.6

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WDS 20251-4518 DON 985 (HD 193998) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20251-4518 DON 985 (HD 193998) : MEASURES

No records found.

WDS 20251-4518 (HD 193998) : VIRTUAL EYEPIECE

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WDS 20251-4518 (HD 193998) : ALADIN DSS IMAGE @ 20^h 25^m 03.82^s -45° 18' 16.6"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20251-4518 DON 985 (HD 193998) : 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		20251-4518	DON 985		341	1.8
Show		20209-4533	SEE 415		97	11.0	47
Show		20264-4603	UC 4184		90	71.7	48
Show		20228-4437	TDT2223		124	2.5	49
Show		20203-4529	KPP3105		128	2.3	52
Show		20199-4503	NSN 480		216	11.3	57
Show		20258-4420	BRT1108		191	12.3	60
Show		20296-4609	I 1422		17	0.1	70
Show		20183-4532	BRT1107		317	5.2	73
Show		20322-4521	RST5470	AB	125	0.2	75
Show		20322-4521	HJ 5204	AB,C	35	6.2	75
Show		20235-4404	WSP 110	AB	114	4.6	77
Show		20235-4404	WSP 110	AC	203	23.5	77
Show		20289-4402	HJ 5201		117	10.7	86
Show		20177-4557	HJ 5184		285	12.3	87
Show		20327-4558	UC 4211		347	28.6	90
Show		20336-4457	KPP 626		123	5.7	93
Show		20166-4554	I 125		45	1.5	97
Show		20286-4655	RSS 548		174	15.4	104
Show		20339-4431	I 127	AB	50	62.3	106
Show		20339-4431	DAM 325	AD	91	49.9	106
Show		20339-4431	DAM 325	AE	101	70.0	106
Show		20267-4334	I 1420		358	0.3	106
Show		20339-4431	I 127	BC	209	0.6	107
Show		20350-4559	UC 4223		99	51.7	113
Show		20152-4603	HJ 5179		136	5.8	113
Show		20227-4711	TDT2219		283	0.5	116
Show		20195-4702	TSN 10		87	68.3	119
Show		20235-4319	TDT2231		227	0.8	120
Show		20248-4719	HDS2920		227	0.2	121
Show		20365-4533	I 41		356	2.3	122
Show		20135-4539	UC 4123		130	22.9	124
Show		20205-4713	I 1415		35	1.8	124
Show		20149-4403	SKF1164		209	66.7	132
Show		20372-4445	TOK 369		245	0.5	133
Show		20377-4520	UC 4239		226	11.9	134
Show		20261-4734	I 1086		23	2.2	136
Show		20238-4736	FIN 278		202	3.9	139
Show		20369-4630	KPP1368		296	10.3	143
Show		20110-4519	BRT1105		55	2.8	149
Show		20333-4722	BRT1110		239	4.1	150
Show		20151-4332	KPP1654		179	12.7	151
Show		20385-4425	I 1424		226	2.4	154
Show		20266-4758	I 1419	AB	129	55.1	161
Show		20266-4758	I 1419	BC	342	3.4	161
Show		20106-4612	RSS 542		311	21.9	161
Show		20097-4522	SKF1162	BC	44	37.6	162
Show		20321-4742	I 1087	AB	95	3.5	162
Show		20321-4742	TOK 628	AC	120	999.9	162
Show		20097-4522	RSS 35	AB	127	47.5	162
Show		20228-4800	UC 4162		127	41.6	164

WDS 20251-4518 : COMPONENTS

	A
B	pa=346.3° sep=1.74"

20251-4518 A

Componente originario normalizzato	AB	Name	HD 193998	Coord arcsec 2000	202503.82-451816.6	Mag	10.52
Spectral class	F3V (yellow-white)	PmRA	25.00	PmDE	-11.0	SAO	230192
Tycho2	8405-01252-1	HD	193998	DM	CP-45 9930

Tycho2

Tycho2	8405-01252-1	Pflag	P	RAmdeg	306.26590114	DEmdeg	-45.30461660
PmRA	24.5	PmDE	-10.7	E RAmdeg	27	E DEmdeg	30
E pmRA	2.1	E pmDE	2.0	EpRAm	1989.02	EpDEm	1987.78
Num	5	Q RAmdeg	0.7	Q DEmdeg	0.7	Q pmRA	0.7
Q pmDE	0.6	BTmag	11.017	E BTmag	0.050	VTmag	10.515
E VTmag	0.045	Prox	18	TYC	T	HIP
CCDM		RAdeg	306.26592611	DEdeg	-45.30481444	EpRA 1990	1.65
EpDE 1990	1.50	E RAdeg	27.8	E DEdeg	32.0	Posflg	D
Corr	-0.2

SAO

SAO	230192	DelFlag		RA1950		PmRA1950	0.0015
DE1950		PmDE1950	-0.017	Vmag	9.5	SpType	F8
Double code		Source	48	CatNum	18780	DM	CP-45 9930
DMcomp		BDsup		HD	193998	M HD	0
GC		RA1950rad	5.33015835	DE1950rad	-0.79356043	PmRA2000	0.0015
PmDE2000	-0.02

CCDM

Ccdm	20251-4518	RComp		Comp	A	Note1
Note2		Discov num		DRAs	-2.28	DDEs	-17.8
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	10.3	Sp	F8	PmNote	*
PmRA	16	PmDE	-17	Dm number	-4513790	Cat1	CD
Name2	230192	Cat2	SAO	HD	193998	M HD
ADS BDS		M ADS BDS		N IDS		IDS	20181S4538A
HIC

20251-4518 B

Componente originario normalizzato	AB		Coord arcsec 2000	202503.78-451814.9		Mag	10.78		PmRA	25.00
PmDE	-11.0		Tycho2	8405-01252-2		Calc delta mag	0.26		Calc coord	yes

Tycho2

Tycho2	8405-01252-2	Pflag	P	RAmdeg	306.26590114	DEmdeg	-45.30461660
PmRA	24.5	PmDE	-10.7	E RAmdeg	27	E DEmdeg	30
E pmRA	2.1	E pmDE	2.0	EpRAm	1989.02	EpDEm	1987.78
Num	5	Q RAmdeg	0.7	Q DEmdeg	0.7	Q pmRA	0.7
Q pmDE	0.6	BTmag	11.090	E BTmag	0.053	VTmag	10.779
E VTmag	0.063	Prox	18	TYC	T	HIP
CCDM		RAdeg	306.26569833	DEdeg	-45.30434278	EpRA 1990	1.65
EpDE 1990	1.51	E RAdeg	32.8	E DEdeg	37.4	Posflg	D
Corr	-0.2

CCDM

Ccdm	20251-4518	RComp		Comp	B	Note1
Note2		Discov num	DON 985	DRAs		DDEs
R dRAs		Year	1929	Theta	340	Rho	1.4
Obs	2	Vmag	10.7	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS		M ADS BDS		N IDS		IDS	20181S4538B
HIC