20478+3944 GRV 381

20^h 47^m 49.53^s +39° 44' 47.3" P.A. 340.00 sep 35.8 mag 11.62,11.46

Coord 2000	20478+3944	Discov num	GRV 381	Comp		Coord arcsec 2000	20 47 49.53 +39 44 47.3
Date first	1892	Date last	2015	Obs	11
Pa first	341	Pa last	339.5	P.A. Now (θ)	339.5°
Sep first	35.9	Sep last	35.752	Sep. Now (ρ)	35.752"
Mag pri	11.62	Mag sec	11.46	delta mag (ΔM)	0.16	Spectral class
Pri motion ra	-009	Sec motion ra	-011
Pri motion dec	-010	Sec motion dec	-013
Notes	S (Parallax indidates non-physical)

rPM=0.212 (< 0.3, Physical double)

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Tycho2

3170-00844-1

Gaia DR2

2065024987507410688

WDS 20478+3944 GRV 381 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Grv2004	Eu -	Greaves, J.	2004MNRAS.355..585G
Grv2004		MNRAS 355, 585, 2004
Grv2005a	Es -	Greaves, J.	...................
Grv2005a	+C	Webb Soc., Double Star Circ. 13, 2005 (GRV 973 - 1147)
Grv2005a		(Note: RA for all WDS designations inadvertently truncated to integer minute)
Grv2005b	Pa -	Greaves, J.	...................
Grv2005b		private communication
Grv2005c	C -	Greaves, J.	2005JDSO....1...41G
Grv2005c		JDSO 1, 41, 2005
Grv2006	-	Greaves, J.	...................
Grv2006		private communication, 2006
Grv2006		(measures done using LSPM-north, see Vizier On-line Data Catalog I/298;
Grv2006		Lepine & Shara 2005)
Grv2006b	Es -	Greaves, J.	...................
Grv2006b		private Communication, 2006
Grv2006b		(Reduction of SDSS data. Calculated position is to J2000, but actual observation
Grv2006b		epoch is unknown and proper motion may or may not have been applied.)
Grv2006c	Ey -	Greaves, J.	...................
Grv2006c		private Communication, 2006
Grv2006c		(Reduction of SPM3.3 data. Calculated position is to 1991.25, but actual
Grv2006c		observation epoch is unknown and proper motion may or may not have been applied.)
Grv2008	Es -	Greaves, J.	...................
Grv2008		Webb Soc., Double Star Circ. 16, 2008
Grv2011	C -	Greaves, J.	...................
Grv2011		Webb Soc., Double Star Circ. 19, 2011
Grv2011		These carry a discovery designation of SPM and come from the SPM4 Catalog	2011AJ....142...15G
Grv2019a	Hg u	Greaves, J.	2019JDSO...15...59G
Grv2019a		JDSO 15, 59, 2019
Grv2019b	Hg u	Greaves, J.	2019JDSO...15...77G
Grv2019b		JDSO 15, 59, 2019
Grv2019c	Hg u	Greaves, J.	...................
Grv2019c		private communication, 2019 (17 April 2019 email)
Grv2019d	Hg -	Greaves, J.	.
Grv2019d		private communication, 2019 (4 Nov 2019 email)
Grv2020a	not -	Greaves, J.	.
Grv2020a		private communication, 2020 (14 Mar 2020 email)
Grv2020b	Hg j	Greaves, J.	.
Grv2020b		Webb Soc., Double Star Circ. 28, 23, 2020
Grv2020c	Hg j	Greaves, J.	.
Grv2020c		Webb Soc., Double Star Circ. 28, 35, 2020
Grv2020d	Hg j	Greaves, J.	.
Grv2020d		Webb Soc., Double Star Circ. 28, 39, 2020
Grv2020e	Hg u	Greaves, J.	2020JDSO...16..317G
Grv2020e		JDSO 16, 317, 2020
Grv2020f	Hg	Greaves, J.	2020JDSO...16..362G
Grv2020f		JDSO 16, 362, 2020
Grv2020g	Hg -	Greaves, J.	.
Grv2020g		private communication, 2020 (29 Nov 2020 email)
Grv2020h	Hg -	Greaves, J.	.
Grv2020h		private communication, 2020 (10 Dec 2020 email)
Grv2020i	Hg -	Greaves, J.	.
Grv2020i		private communication, 2020 (12 Dec 2020 email)
Grv2020j	Hg -	Greaves, J.	.
Grv2020j		private communication, 2020 (21 Dec 2020 email)
Grv2021a	not -	Greaves, J.	.
Grv2021a		private communication, 2021 (18 Feb 2021 email)
Grv2021b	not -	Greaves, J.	.
Grv2021b		private communication, 2021 (23 Feb 2021 email)
Grv2021c	Hg+ -	Greaves, J., Rica Romero, F.M. & Otero, S.	2021JDSO...17..137G
Grv2021c	+orb	JDSO 17, 137, 2021
Grv2021d	Hg -	Greaves, J.	.
Grv2021d		private communication, 2021 (23 Aug 2021 email)
Grv2021e	Hg -	Greaves, J.	.
Grv2021e		private communication, 2021 (24 Aug 2021 email)
Grv2022	Hg j	Greaves, J. .
Grv2022		Webb Soc., Double Star Circ. 30, 27, 2022
Grv2023a	Hg -	Greaves, J.	.
Grv2023a		private communication, 2023 (15 Feb 2023 email)

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20478+3944	GRV 381		2000	6	340	35.8	11.52	11.96		D	204749.53+394447.3
20478+3944	GRV 381		2002	7	340	35.8	11.52	11.96		D	204749.53+394447.3
20478+3944	GRV 381		2010	7	340	35.8	11.62	11.46			204749.53+394447.3
20478+3944	GRV 381		2015	8	340	35.8	11.62	11.46			204749.53+394447.3

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

WDS 20478+3944 GRV 381 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20478+3944 GRV 381 : MEASURES

No records found.

WDS 20478+3944 : VIRTUAL EYEPIECE

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

WDS 20478+3944 : ALADIN DSS IMAGE @ 20^h 47^m 49.53^s +39° 44' 47.3"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20478+3944 GRV 381 : NEIGHBORHOODS

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		20478+3944	GRV 381		340	35.8	1
Show		20490+3947	STF2731	AB	86	4.1	14
Show		20490+3947	HO 596	AC	178	18.0	14
Show		20490+3947	HO 596	AD	247	18.2	14
Show		20481+3958	CVR 231		359	9.7	14
Show		20484+4002	SEI1255	AB	338	24.4	19
Show		20484+4002	J 1237	BC	355	5.6	19
Show		20486+4000	TOB 198		96	21.0	19
Show		20490+3925	TDT2560		38	1.1	24
Show		20498+3958	SEI1267		308	3.1	28
Show		20480+3917	A 1434	AB	178	0.0	28
Show		20480+3917	A 1434	AB,C	256	2.5	28
Show		20493+3923	SEI1263	AB	98	23.6	28
Show		20493+3923	ALI 952	BC	50	4.9	28
Show		20493+3923	DAM 26	BD	53	9.5	28
Show		20489+3919	TDT2558		191	1.1	29
Show		20457+3917	SEI1241		309	7.1	38
Show		20466+4020	ES 1982		301	3.9	39
Show		20454+4011	TDT2518		203	0.7	39
Show		20453+4010	COU2293		201	1.1	39
Show		20456+4014	TDT2519		347	1.3	40
Show		20488+4024	ALI1192		2	16.5	41
Show		20514+3945	MLB 779	AB	124	9.0	41
Show		20514+3945	DAM 316	AC	79	6.3	41
Show		20514+3945	DAM 316	AD	304	13.8	41
Show		20515+3944	DAM 317	AB	95	14.8	42
Show		20515+3944	DAM 317	AC	357	15.2	42
Show		20514+3927	TDT2581		146	0.8	45
Show		20445+3921	HJ 1572		280	15.6	46
Show		20441+3927	ES 1981		310	4.5	47
Show		20510+3915	SEI1279	AB	147	12.9	48
Show		20510+3915	SEI1279	BC	189	7.3	48
Show		20454+4023	OSO 133	AB	114	12.0	48
Show		20454+4023	OSO 133	AC	236	11.7	48
Show		20454+4023	OSO 133	AD	67	21.8	48
Show		20454+4023	OSO 133	AE	8	22.4	48
Show		20438+3928	SEI1230		124	25.3	50
Show		20498+3900	MLB 983		191	3.8	51
Show		20461+3858	CRB 11		272	10.8	51
Show		20449+3908	SEI1236		318	27.4	51
Show		20434+3943	TDT2497		317	0.5	51
Show		20476+4038	CNT 9		292	9.0	54
Show		20434+4001	BRT2272		285	5.1	54
Show		20495+4035	COU2426		328	1.2	55
Show		20520+4009	MLB 955		27	6.6	55
Show		20471+3850	HJ 1575		51	14.9	55
Show		20435+3919	SEI1229		156	19.6	56
Show		20485+4041	ES 1682		152	3.1	57
Show		20459+3852	COU2294		125	0.9	58
Show		20444+4027	TDT2510		157	0.9	58
Show		20453+3854	SEI1239		40	26.8	59

WDS 20478+3944 : COMPONENTS

	A
B	pa=344.0° sep=34.84"

20478+3944 A

Componente originario normalizzato	AB		Coord arcsec 2000	204749.53+394447.3		Mag	11.62		PmRA	-9.00
PmDE	-10.0		Tycho2	3170-00844-1

Tycho2

Tycho2	3170-00844-1	Pflag		RAmdeg	311.95637023	DEmdeg	39.74647523
PmRA	-7.3	PmDE	-9.3	E RAmdeg	65	E DEmdeg	64
E pmRA	2.1	E pmDE	1.9	EpRAm	1979.14	EpDEm	1976.92
Num	4	Q RAmdeg	2.1	Q DEmdeg	1.0	Q pmRA	2.1
Q pmDE	1.0	BTmag	13.171	E BTmag	0.282	VTmag	11.515
E VTmag	0.098	Prox	358	TYC		HIP
CCDM		RAdeg	311.95638722	DEdeg	39.74649444	EpRA 1990	1.70
EpDE 1990	1.75	E RAdeg	70.0	E DEdeg	70.0	Posflg
Corr	0.0

20478+3944 B

Componente originario normalizzato	AB		Coord arcsec 2000	204748.70+394520.8		Mag	11.46		PmRA	-11.00
PmDE	-13.0		Tycho2	3170-01476-1		Calc delta mag	0.16		Calc coord	yes

Tycho2

Tycho2	3170-01476-1	Pflag		RAmdeg	311.95188001	DEmdeg	39.75579522
PmRA	-9.7	PmDE	-10.3	E RAmdeg	66	E DEmdeg	60
E pmRA	1.9	E pmDE	1.8	EpRAm	1975.72	EpDEm	1976.93
Num	4	Q RAmdeg	0.5	Q DEmdeg	0.4	Q pmRA	0.5
Q pmDE	0.4	BTmag	12.160	E BTmag	0.124	VTmag	11.964
E VTmag	0.156	Prox	358	TYC		HIP
CCDM		RAdeg	311.95190778	DEdeg	39.75581889	EpRA 1990	1.65
EpDE 1990	1.75	E RAdeg	73.1	E DEdeg	65.9	Posflg
Corr	0.0