20251+0728 UC 4173

20^h 25^m 04.04^s +07° 28' 23.6" P.A. 359.00 sep 42.9 mag 7.81,14.21 Sp F0 dist. 198.02 pc (645.94 l.y.)

Coord 2000	20251+0728	Discov num	UC 4173	Comp		Coord arcsec 2000	20 25 04.04 +07 28 23.6
Date first	2000	Date last	2015	Obs	4
Pa first	358	Pa last	358.5	P.A. Now (θ)	358.5°
Sep first	42.5	Sep last	42.868	Sep. Now (ρ)	42.868"
Mag pri	7.81	Mag sec	14.21	delta mag (ΔM)	6.4	Spectral class	F0 (yellow-white)
Pri motion ra	-030	Sec motion ra	-050
Pri motion dec	-040	Sec motion dec	-039
Notes	V (Proper motion indicates physical)

rPM=0.316

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation	Delphinus	SAO	125780	HIP	100712	Tycho2	0509-00139-1
Gaia DR2	1751923555247825280	HD	194388	BD	BD+07 4462	Distance	198.02
Distance ly	645.94

WDS 20251+0728 UC 4173 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
UC		USNO CCD Astrographic Catalog (UCAC1, UCAC2, UCAC3, UCAC4)	...................
UC_2013a	Eu j	Zacharias, N., Finch, C.T., Girard, T.M., Henden, A., Bartlett, J.L., Monet, D.G.,	2013AJ....145...44Z
UC_2013a		& Zacharias, M.I. (UCAC4 Catalog)
UC_2013a		AJ 145, 44, 2013
UC_2013b	Eu j	Hartkopf, W.I., Mason, B.D., Finch, C.T., Zacharias, N., Wycoff, G.L., & Hsu, D.	2013AJ....146...76H
UC_2013b		AJ 146, 76, 2013 (UC 301 - 5058)
UC_2013b		(Relative astrometry is derived from individual measurements, not precessed means.
UC_2013b		UCAC aperture magnitudes are listed, unless the duplicity flag indicates a blended
UC_2013b		image (a flag value of 30 or higher). Model fit magnitudes are given for both
UC_2013b		components if either has such a flag. Model fit magnitudes are indicated by the
UC_2013b		letter "f" following the filter information.
UC_2013b		APASS photometry extracted from UCAC4 catalog is listed under reference AAV2012.
UC_2013b		Due to aperture method used, APASS photometry is only included for pairs wider
UC_2013b		than 10" (Henden, private comm.) Photometry for pairs wider than 10" which showed
UC_2013b		identical values for both components in all filters were removed, as well.
UC_2015	Eu -	Zacharias, N., Finch, C.T., Subasavage, J.P., Bredthauer, G., Crockett, C.,	2015AJ....150..101Z
UC_2015		DiVittorio, M., Ferguson, E., Harris, F., Harris, H.C., Hendon, A., Kilian, C.,
UC_2015		Munn, J., Rafferty, T., Rhodes, A., Schultheis, M., Tilleman, T., & Wieder, G.
UC_2015		AJ 150, 101, 2015
UC_9999	Eu -	temporary UCAC files	...................

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20251+0728	UC 4173		2000	2	358	42.5	8.70	14.20		V	202504.04+072823.6
20251+0728	UC 4173		2010	3	358	42.6	7.81	14.21	F0	V	202504.04+072823.6
20251+0728	UC 4173		2015	4	359	42.9	7.81	14.21	F0	V	202504.04+072823.6

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

WDS 20251+0728 UC 4173 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20251+0728 UC 4173 : MEASURES

No records found.

WDS 20251+0728 : VIRTUAL EYEPIECE

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

WDS 20251+0728 : ALADIN DSS IMAGE @ 20^h 25^m 04.04^s +07° 28' 23.6"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20251+0728 UC 4173 : 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+0728	UC 4173		359	42.9	1
Show		20264+0741	UC 4183		195	59.7	24
Show		20254+0700	UC 4176		120	51.9	30
Show		20256+0801	LDS4842		218	101.0	34
Show		20276+0745	J 1297		2	1.0	41
Show		20278+0734	GWP2954		290	50.4	42
Show		20264+0810	GWP2947	AB		43.1	46
Show		20230+0803	UC 4163		291	56.4	47
Show		20258+0818	UC 4178		267	86.2	51
Show		20277+0803	HJ 2966		259	3.6	51
Show		20284+0746	BRT2186		173	5.0	53
Show		20262+0827	UC 4180		303	9.7	62
Show		20290+0710	A 610		99	0.6	63
Show		20209+0727	UC 4153		201	23.7	63
Show		20269+0826	LDS4843		167	15.3	64
Show		20213+0808	GRV 333		193	60.7	69
Show		20264+0620	GWP2946		30	25.6	72
Show		20218+0635	TDT2207		258	0.9	73
Show		20300+0730	NSN 733		133	39.4	74
Show		20301+0730	LDS4846		313	39.4	75
Show		20198+0716	GRV 331		323	47.5	79
Show		20253+0847	NSN 732		235	3.3	79
Show		20300+0655	LDS4845		27	83.4	82
Show		20256+0604	UC 4177		278	14.3	85
Show		20202+0815	DAM 210		321	3.9	87
Show		20201+0820	HJ 2949	AB	302	7.5	90
Show		20201+0820	DAM 209	AC	224	12.7	90
Show		20211+0837	HJ 2953		260	26.3	91
Show		20259+0902	J 3084		87	6.0	95
Show		20292+0840	GWP2959		280	37.8	95
Show		20314+0701	J 3221		167	3.9	97
Show		20185+0750	SKF1865		240	56.6	100
Show		20186+0704	HJ 2945		55	10.1	101
Show		20271+0551	HJ 2963		209	9.5	102
Show		20321+0737	UC 4206		33	73.1	105
Show		20309+0626	DAE 10	AB	103	0.7	108
Show		20309+0626	WSP 2	AC	114	11.6	108
Show		20309+0626	WSP 2	AD	183	13.6	108
Show		20309+0626	WSP 2	AE	16	18.5	108
Show		20309+0626	WSP 2	AF	176	19.8	108
Show		20245+0916	HJ 2959		262	7.4	108
Show		20234+0535	WHC 19		178	2.0	115
Show		20233+0534	OPI 24		351	9.2	118
Show		20183+0627	DAM 208	AB	8	4.9	118
Show		20183+0627	DAM 208	AC	298	5.3	118
Show		20185+0626	J 2191		134	4.8	119
Show		20327+0656	HDS2934		75	1.2	119
Show		20246+0531	BU 664	AB	287	9.0	119
Show		20246+0531	FOX9034	AC	89	35.6	119
Show		20280+0923	TDT2300		101	0.5	123
Show		20329+0647	UC 4213		204	9.0	124

WDS 20251+0728 : COMPONENTS

	A
B	pa=358.5° sep=42.87"

20251+0728 A

Componente originario normalizzato	AB	Coord arcsec 2000	202504.04+072823.6	Mag	7.81	Spectral class	F0 (yellow-white)
PmRA	-30.00	PmDE	-40.0	SAO	125780	HIP	100712
Tycho2	0509-00139-1	HD	194388	BD	BD+07 4462

Tycho2

Tycho2	0509-00139-1	Pflag		RAmdeg	306.26680955	DEmdeg	7.47320925
PmRA	-30.3	PmDE	-39.7	E RAmdeg	5	E DEmdeg	6
E pmRA	1.7	E pmDE	1.7	EpRAm	1991.27	EpDEm	1991.12
Num	10	Q RAmdeg	0.6	Q DEmdeg	0.8	Q pmRA	0.6
Q pmDE	0.8	BTmag	8.197	E BTmag	0.017	VTmag	7.810
E VTmag	0.012	Prox	742	TYC	T	HIP	100712
CCDM		RAdeg	306.26688167	DEdeg	7.47330417	EpRA 1990	1.53
EpDE 1990	1.41	E RAdeg	5.4	E DEdeg	5.9	Posflg
Corr	-0.2

SAO

SAO	125780	DelFlag		RA1950		PmRA1950	-0.002
DE1950		PmDE1950	-0.025	Vmag	8.2	SpType	F0
Double code		Source	32	CatNum	10059	DM	BD+07 4462
DMcomp		BDsup		HD	194388	M HD	0
GC		RA1950rad	5.33469926	DE1950rad	0.12759165	PmRA2000	-0.0018
PmDE2000	-0.028

Hipparcos

Catalog	H	HIP	100712	Proxy		RAhms	20 25 04.05
DEdms	+07 28 23.9	Vmag	7.77	VarFlag		R Vmag	H
RAdeg	306.267	DEdeg	7.47331	AstroRef		Plx	5.87
CCDM		N CCDM		Nsys		Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD	194388	BD	BD+07 4462
CD		CP		Dm number	+07 4462	VIred	0.45
SpType	F0	R SpType		Coord arcsec 2000	202504.05+072823.9

Hipparcos 2

HIP	100712	Sn	5	So	0	Nc	1
RArad	5.3453655246	DErad	0.1304338048	Plx	5.05	PmRA	-31.53
PmDE	-39.06	E RArad	0.5	E DErad	0.55	E Plx	0.67
E pmRA	0.6	E pmDE	0.71	Hpmag	7.8548	E Hpmag	0.0013
SHp	0.009	VA	0	BV	0.382	E BV	0.009
VI	0.45

20251+0728 B

Componente originario normalizzato	AB		Coord arcsec 2000	202503.97+072906.5		Mag	14.21		PmRA	-50.00
PmDE	-39.0		Calc delta mag	6.4		Calc coord	yes