21207+4251 GRV 452

21^h 20^m 47.33^s +42° 51' 57.0" P.A. 162.00 sep 59.2 mag 12.80,13.21

Coord 2000	21207+4251	Discov num	GRV 452	Comp		Coord arcsec 2000	21 20 47.33 +42 51 57.0
Date first	1998	Date last	2015	Obs	7
Pa first	162	Pa last	161.9	P.A. Now (θ)	161.9°
Sep first	59.3	Sep last	59.237	Sep. Now (ρ)	59.237"
Mag pri	12.80	Mag sec	13.21	delta mag (ΔM)	0.41	Spectral class
Pri motion ra	-011	Sec motion ra	+001
Pri motion dec	-012	Sec motion dec	-010
Notes

rPM=0.747

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Gaia DR2

1970615417289345792

WDS 21207+4251 GRV 452 : 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
21207+4251	GRV 452		2000	2	162	59.3	12.60	12.90		D	212047.33+425157.0
21207+4251	GRV 452		2002	3	162	59.3	12.60	12.90		D	212047.33+425157.0
21207+4251	GRV 452		2010	3	162	59.5	12.80	13.21			212047.33+425157.0
21207+4251	GRV 452		2015	4	162	59.2	12.80	13.21			212047.33+425157.0

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

WDS 21207+4251 GRV 452 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21207+4251 GRV 452 : MEASURES

No records found.

WDS 21207+4251 : VIRTUAL EYEPIECE

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WDS 21207+4251 : ALADIN DSS IMAGE @ 21^h 20^m 47.33^s +42° 51' 57.0"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21207+4251 GRV 452 : 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		21207+4251	GRV 452		162	59.2	1
Show		21214+4301	ES 1585	BC	202	8.4	12
Show		21214+4301	ES 1585	AB	230	19.2	12
Show		21214+4301	ES 1585	AC	221	26.9	12
Show		21195+4253	FOX 259	AB	307	12.5	15
Show		21213+4235	LDS2513		246	7.1	17
Show		21199+4307	COU2439		266	0.8	19
Show		21218+4309	STT 438		357	2.2	20
Show		21200+4308	LDS2509		176	1.9	21
Show		21197+4228	ES 1583	AB	238	13.0	27
Show		21197+4228	ABH 144	AD	112	64.4	27
Show		21197+4228	ABH 144	AE	219	27.2	27
Show		21197+4228	ABH 144	AF	245	62.8	27
Show		21197+4228	ABH 144	AG	238	82.9	27
Show		21197+4228	ABH 144	AH	22	41.7	27
Show		21197+4228	ABH 144	AI	117	69.6	27
Show		21197+4228	ABH 144	AJ	112	81.2	27
Show		21197+4228	ABH 144	AK	98	101.4	27
Show		21197+4228	ES 1583	AC	223	7.6	27
Show		21197+4228	ES 1583	BC	77	6.0	27
Show		21232+4258	COU2304	AB	154	0.4	28
Show		21232+4258	GII 32	AB,C	49	5.4	28
Show		21183+4244	HJ 1634		143	28.9	29
Show		21192+4320	TDT2899		136	0.6	33
Show		21206+4219	WSI 16		149	8.2	34
Show		21202+4325	BRT1148		83	4.1	35
Show		21178+4302	A 616		316	2.7	35
Show		21206+4215	LDS2511	AB	40	3.0	38
Show		21206+4215	LDS2511	AC	197	19.7	38
Show		21202+4207	ES 1584		116	5.4	45
Show		21171+4312	A 401		318	0.4	46
Show		21208+4206	GRV 453		27	66.2	46
Show		21219+4347	TDT2924		221	1.0	57
Show		21160+4313	LDS2503		131	4.0	57
Show		21161+4224	ES 1582		134	3.5	59
Show		21171+4206	TDT2883		112	0.9	62
Show		21189+4351	COU2438		254	1.4	62
Show		21223+4353	TDT2930		356	1.8	63
Show		21151+4257	COU2300		263	0.3	63
Show		21265+4254	TDT2967		4	1.4	64
Show		21249+4336	BRT1150		60	2.9	64
Show		21158+4326	TDT2867		305	0.6	65
Show		21176+4350	COU2301		69	0.5	67
Show		21151+4227	COU2228		28	0.5	68
Show		21154+4325	LDS2502		172	67.0	70
Show		21185+4357	TRN 32		81	3.8	70
Show		21171+4350	TDT2882		334	0.6	71
Show		21268+4228	A 619		61	0.7	71
Show		21273+4315	HJ 1646		115	23.1	72
Show		21235+4147	TDT2939		174	0.4	72
Show		21155+4205	TDT2861		287	2.4	75

WDS 21207+4251 : COMPONENTS

	A
B	pa=166.5° sep=57.90"

21207+4251 A

Componente originario normalizzato	AB		Coord arcsec 2000	212047.33+425157.0		Mag	12.8		PmRA	-11.00
PmDE	-12.0

21207+4251 B

Componente originario normalizzato	AB		Coord arcsec 2000	212048.56+425100.7		Mag	13.21		PmRA	1.00
PmDE	-10.0		Calc delta mag	0.41		Calc coord	yes