20306+1540 GRV 346

20^h 30^m 39.61^s +15° 40' 37.0" P.A. 11.00 sep 66.6 mag 11.11,12.61

Coord 2000	20306+1540	Discov num	GRV 346	Comp		Coord arcsec 2000	20 30 39.61 +15 40 37.0
Date first	2000	Date last	2015	Obs	8
Pa first	11	Pa last	11	P.A. Now (θ)	11°
Sep first	66.1	Sep last	66.571	Sep. Now (ρ)	66.571"
Mag pri	11.11	Mag sec	12.61	delta mag (ΔM)	1.5	Spectral class
Pri motion ra	-011	Sec motion ra	+004
Pri motion dec	-041	Sec motion dec	-008
Notes	S (Parallax indidates non-physical)

rPM=0.854

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Delphinus

Tycho2

1632-00754-1

Gaia DR2

1805569960220238080

WDS 20306+1540 GRV 346 : 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
20306+1540	GRV 346		2000	2	11	66.1	11.00	12.40		D	203039.61+154037.0
20306+1540	GRV 346		2001	3	11	66.1	11.00	12.40		D	203039.61+154037.0
20306+1540	GRV 346		2010	3	11	66.9	11.11	12.61			203039.61+154037.0
20306+1540	GRV 346		2015	4	11	66.6	11.11	12.61			203039.61+154037.0

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

WDS 20306+1540 GRV 346 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20306+1540 GRV 346 : MEASURES

No records found.

WDS 20306+1540 : VIRTUAL EYEPIECE

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

WDS 20306+1540 : ALADIN DSS IMAGE @ 20^h 30^m 39.61^s +15° 40' 37.0"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20306+1540 GRV 346 : 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		20306+1540	GRV 346		11	66.6
Show		20311+1548	A 1675		294	0.1	11
Show		20311+1600	BPM2181		57	94.1	21
Show		20324+1524	TDS1080		286	1.0	31
Show		20295+1512	BPM2175		197	75.4	33
Show		20321+1511	A 1677		184	1.3	37
Show		20288+1514	SLW1225		38	11.7	38
Show		20334+1544	BPM2186		75	53.0	41
Show		20294+1617	BPM2174		211	87.3	41
Show		20291+1622	BPM2172		155	50.8	48
Show		20279+1515	BPMA248		224	168.3	48
Show		20340+1543	CBL 527		190	50.3	48
Show		20315+1448	J 1884		132	8.8	52
Show		20271+1549	BPM2168		55	108.3	53
Show		20270+1541	BPM2165		182	62.1	54
Show		20275+1514	J 3087		329	6.2	54
Show		20315+1446	J 1885		353	12.0	55
Show		20280+1624	BPM2170		207	80.4	58
Show		20316+1442	A 1676		99	1.9	60
Show		20268+1603	GWP2950		44	20.6	61
Show		20274+1457	BRT1343		335	4.5	64
Show		20276+1629	GWP2953		29	69.7	66
Show		20275+1454	A 1674	AB	14	0.9	66
Show		20275+1454	A 1674	AC	294	8.4	66
Show		20275+1454	A 1674	CD	171	1.3	66
Show		20351+1533	J 566		119	4.1	66
Show		20311+1648	J 563	BC	215	5.1	69
Show		20311+1648	ROE 14	AB	262	7.0	69
Show		20259+1549	BPM2154		206	93.0	69
Show		20357+1522	ARY 85		321	83.6	76
Show		20255+1555	BPM2152		335	107.4	76
Show		20284+1432	TDT2312		251	0.6	77
Show		20257+1510	BPM2153		113	95.6	79
Show		20352+1457	SKF1767		246	1.5	80
Show		20252+1532	TDT2256		43	0.9	80
Show		20281+1654	HEI 180		166	1.1	82
Show		20250+1532	TDS1072		161	0.9	83
Show		20253+1609	BPM2150		238	101.1	83
Show		20263+1445	J 3085		206	6.0	85
Show		20320+1416	HJL 282		189	74.8	87
Show		20332+1659	BPM2185		75	70.1	87
Show		20267+1646	TVB 314		209	17.2	87
Show		20366+1553	BPM2207		49	43.4	87
Show		20348+1644	BPM2196	BC	128	63.7	88
Show		20348+1644	BPM2195	AB	302	71.3	88
Show		20351+1439	BPM2198	BC	11	114.9	89
Show		20351+1439	BPM2197	AB	327	17.3	89
Show		20267+1431	BPM2162		214	78.9	91
Show		20353+1440	DRS 32		143	13.5	91
Show		20340+1659	BPM2190		300	100.0	92
Show		20298+1712	J 510		248	4.9	93

WDS 20306+1540 : COMPONENTS

	A
B	pa=10.6° sep=66.48"

20306+1540 A

Componente originario normalizzato	AB		Coord arcsec 2000	203039.61+154037.0		Mag	11.11		PmRA	-11.00
PmDE	-41.0		Tycho2	1632-00754-1

Tycho2

Tycho2	1632-00754-1	Pflag		RAmdeg	307.66504437	DEmdeg	15.67697728
PmRA	-10.1	PmDE	-35.6	E RAmdeg	70	E DEmdeg	74
E pmRA	2.0	E pmDE	1.9	EpRAm	1974.21	EpDEm	1970.15
Num	3	Q RAmdeg	0.1	Q DEmdeg	1.1	Q pmRA	0.1
Q pmDE	1.2	BTmag	11.866	E BTmag	0.110	VTmag	11.824
E VTmag	0.189	Prox	999	TYC		HIP
CCDM		RAdeg	307.66506917	DEdeg	15.67706111	EpRA 1990	1.57
EpDE 1990	1.46	E RAdeg	77.5	E DEdeg	85.0	Posflg
Corr	0.0

20306+1540 B

Componente originario normalizzato	AB		Coord arcsec 2000	203040.46+154142.3		Mag	12.61		PmRA	4.00
PmDE	-8.0		Calc delta mag	1.5		Calc coord	yes