20478+0818 UC 4291

20^h 47^m 48.48^s +08° 18' 02.6" P.A. 7.00 sep 46.1 mag 10.89,14.77

Coord 2000	20478+0818	Discov num	UC 4291	Comp		Coord arcsec 2000	20 47 48.48 +08 18 02.6
Date first	2000	Date last	2010	Obs	3
Pa first	8	Pa last	7.2	P.A. Now (θ)	7.2°
Sep first	46.3	Sep last	46.14	Sep. Now (ρ)	46.14"
Mag pri	10.89	Mag sec	14.77	delta mag (ΔM)	3.88	Spectral class
Pri motion ra	+054	Sec motion ra	+067
Pri motion dec	-008	Sec motion dec	+003
Notes	V (Proper motion indicates physical)

rPM=0.254 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Delphinus

Tycho2

1089-03217-1

Gaia DR2

1749975289361628928

WDS 20478+0818 UC 4291 : 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
20478+0818	UC 4291		2000	2	8	46.3	10.90	14.80		V	204748.48+081802.6
20478+0818	UC 4291		2010	3	7	46.1	10.89	14.77		V	204748.48+081802.6

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

WDS 20478+0818 UC 4291 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20478+0818 UC 4291 : MEASURES

No records found.

WDS 20478+0818 : VIRTUAL EYEPIECE

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

WDS 20478+0818 : ALADIN DSS IMAGE @ 20^h 47^m 48.48^s +08° 18' 02.6"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20478+0818 UC 4291 : 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		20478+0818	UC 4291		7	46.1
Show		20468+0821	GWP2998		50	104.9	16
Show		20462+0822	SKF1867		357	6.1	24
Show		20457+0838	A 1210		247	4.0	37
Show		20501+0802	GWP3003		228	21.2	38
Show		20504+0822	KPP4214		86	4.3	39
Show		20478+0857	UC 4290		5	86.8	40
Show		20504+0834	UC 4306		296	42.5	42
Show		20468+0733	GAA 8		1	0.0	48
Show		20507+0859	TDT2574		142	1.4	59
Show		20446+0854	LDS1046		344	15.0	61
Show		20516+0747	SKF1868		313	57.7	65
Show		20473+0924	GWP2999		356	110.7	66
Show		20487+0706	J 3223		307	2.7	71
Show		20516+0734	A 612		7	2.0	72
Show		20457+0709	BU 834		134	2.4	76
Show		20537+0833	GWP3013		15	7.0	89
Show		20527+0720	STF2733		145	40.2	94
Show		20422+0724	J 571		255	3.9	96
Show		20454+0952	HEI 589		257	1.8	101
Show		20426+0714	TDT2489		232	0.4	101
Show		20533+0919	A 1214		171	3.7	102
Show		20539+0730	TDT2613		69	0.6	103
Show		20442+0648	SKF2552	BC	343	11.4	105
Show		20442+0648	SKF2552	AB	60	17.6	106
Show		20442+0648	SKF2552	AC	31	23.1	106
Show		20544+0902	CVN 109		283	0.5	107
Show		20550+0823	UC 4323		103	35.6	108
Show		20543+0918	TDT2620		68	0.5	113
Show		20554+0836	J 1318		139	0.9	114
Show		20550+0907	TDT2628		64	0.5	118
Show		20552+0729	GWP3017		96	132.1	121
Show		20559+0835	J 157		171	3.8	121
Show		20537+0942	LDS4859		318	10.7	121
Show		20464+0618	TDT2533		230	0.7	123
Show		20560+0837	J 1346		327	2.4	123
Show		20457+1017	OSO 134	AB	44	11.1	124
Show		20457+1017	OSO 134	AC	45	19.4	124
Show		20421+0648	GWP2987		295	266.1	124
Show		20560+0840	TDT2638		97	2.2	124
Show		20511+0623	STF2730		333	3.3	125
Show		20531+0956	GWP3011		254	82.6	126
Show		20543+0650	TDT2621		4	1.7	131
Show		20397+0910	UC 4248		329	36.4	131
Show		20521+1014	A 1212		11	0.6	133
Show		20459+0607	TDT2523		80	1.7	135
Show		20562+0728	LDS4861		90	2.0	136
Show		20388+0750	TDT2448		28	0.6	136
Show		20569+0842	RAO 443		297	0.2	137
Show		20568+0844	CRB 13		177	131.6	137
Show		20478+0600	BU 65		200	1.5	138

WDS 20478+0818 : COMPONENTS

	A
B	pa=7.1° sep=46.13"

20478+0818 A

Componente originario normalizzato	AB		Coord arcsec 2000	204748.48+081802.6		Mag	10.89		PmRA	54.00
PmDE	-8.0		Tycho2	1089-03217-1

Tycho2

Tycho2	1089-03217-1	Pflag		RAmdeg	311.95197973	DEmdeg	8.30072559
PmRA	55.1	PmDE	-6.7	E RAmdeg	39	E DEmdeg	47
E pmRA	2.5	E pmDE	2.3	EpRAm	1988.62	EpDEm	1986.66
Num	3	Q RAmdeg	0.6	Q DEmdeg	1.0	Q pmRA	0.6
Q pmDE	1.0	BTmag	11.603	E BTmag	0.069	VTmag	11.053
E VTmag	0.071	Prox	999	TYC	T	HIP
CCDM		RAdeg	311.95185111	DEdeg	8.30074056	EpRA 1990	1.70
EpDE 1990	1.66	E RAdeg	40.4	E DEdeg	47.6	Posflg
Corr	-0.2

20478+0818 B

Componente originario normalizzato	AB		Coord arcsec 2000	204748.87+081848.4		Mag	14.77		PmRA	67.00
PmDE	3.0		Calc delta mag	3.88		Calc coord	yes