20423+1921 SHN 39

20^h 42^m 15.78^s +19° 21' 51.6" P.A. 54.00 sep 0.5 mag 12.30,14.70

Coord 2000	20423+1921	Discov num	SHN 39	Comp		Coord arcsec 2000	20 42 15.78 +19 21 51.6
Date first	1997	Date last	2012	Obs	2
Pa first	47	Pa last	54.3	P.A. Now (θ)	54.3°
Sep first	0.4	Sep last	0.458	Sep. Now (ρ)	0.458"
Mag pri	12.30	Mag sec	14.70	delta mag (ΔM)	2.4	Spectral class
Pri motion ra	+001	Sec motion ra
Pri motion dec	-001	Sec motion dec
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Delphinus

Gaia DR2

1814151304876961408

WDS 20423+1921 SHN 39 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Shn1993	O j	Schneider, G. & Anderson, C.	1993PASP..105..367S
Shn1993		PASP 105, 367, 1993
Shn1998	Hf j	Schneider, G., Hershey, J.L., & Wenz, M.T.	1998PASP..110.1012S
Shn1998		PASP 110, 1012, 1998
Shn2004	Hn -	Schneider, G., Song, I., Zuckerman, B., Becklin, E., Lowrance, P., Macintosh, B.,	2004AAS...205.1114S
Shn2004		Bessell, M., Dumas, C., & Chauvin, G.
Shn2004		BAAS 205, 1114, 2004 (all data also in Son2006)	2006ApJ...652..724

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20423+1921	SHN 39		1997	1	47	0.4	12.16				204215.78+192151.6
20423+1921	SHN 39		2012	2	54	0.5	12.30	14.70			204215.78+192151.6

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WDS 20423+1921 SHN 39 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20423+1921 SHN 39 : MEASURES

No records found.

WDS 20423+1921 : VIRTUAL EYEPIECE

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WDS 20423+1921 : ALADIN DSS IMAGE @ 20^h 42^m 15.78^s +19° 21' 51.6"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20423+1921 SHN 39 : 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		20423+1921	SHN 39		54	0.5
Show		20419+1931	COU 226	AB	53	0.4	12
Show		20419+1931	COU 226	AC	337	13.9	12
Show		20436+1944	STF2722		306	7.5	30
Show		20422+1952	LBU 19	AB	138	124.7	31
Show		20422+1952	LBU 19	AC	111	94.9	31
Show		20422+1952	LBU 19	AD	23	129.8	31
Show		20433+1855	TDS1094		261	1.0	31
Show		20435+1953	STF2721		22	2.6	36
Show		20398+1927	J 2604		141	2.2	37
Show		20444+1945	CAR 2		82	0.2	38
Show		20408+1956	RAO 23	Ca,Cb	227	0.2	39
Show		20408+1956	RAO 23	CD	303	20.3	39
Show		20408+1956	RAO 23	CE	327	29.4	39
Show		20408+1956	BUP 215	AB	25	69.4	41
Show		20408+1956	LDS1045	AC	184	125.2	41
Show		20448+1943	COU 424		239	5.5	42
Show		20410+2001	HJ 2987		116	10.8	44
Show		20425+1837	TDT2486		76	0.7	45
Show		20395+1857	HU 362		313	0.6	47
Show		20393+2003	J 3103		224	5.5	57
Show		20385+1848	J 3102		96	6.4	60
Show		20420+1821	J 193		81	5.5	61
Show		20466+1915	COU 426		158	0.3	63
Show		20412+2023	COU 423		162	0.4	64
Show		20467+1913	GWP2997		116	272.0	64
Show		20396+2018	WFC 257		317	6.7	68
Show		20471+1918	HO 141	AB	294	1.6	69
Show		20471+1918	HO 141	AC	64	22.6	69
Show		20386+2007	COU 225		286	0.3	70
Show		20378+1936	J 3099		145	5.5	71
Show		20467+1846	YR 28		71	0.0	72
Show		20472+1901	TDT2538		234	1.0	73
Show		20447+2032	BRT2484		5	2.9	79
Show		20395+1812	BPM2220		281	105.7	81
Show		20419+2043	BU 673	AB	292	3.9	82
Show		20419+2043	BU 673	AC	163	102.6	82
Show		20376+1835	COU 224		322	0.4	82
Show		20402+2039	SCA 173		170	1.5	83
Show		20403+2040	TDT2461		356	0.5	83
Show		20437+1800	LDS4857		128	52.4	85
Show		20363+1924	KPP 475		113	4.8	85
Show		20449+2041	J 1179		143	4.0	86
Show		20375+1828	GRV 363		48	14.1	87
Show		20479+1840	UC 4292		105	11.0	90
Show		20485+1854	HO 459		24	0.5	93
Show		20444+1752	UC 4276		284	50.8	95
Show		20488+1943	JNN 286		179	0.2	96
Show		20448+2051	A 172		219	2.9	97
Show		20400+1749	BPM2222		294	86.5	99
Show		20406+2059	TDT2465		30	1.1	101

WDS 20423+1921 : COMPONENTS

	A
B	pa=52.7° sep=0.44"

20423+1921 A

Componente originario normalizzato	AB		Coord arcsec 2000	204215.78+192151.6		Mag	12.3		PmRA	1.00
PmDE	-1.0

20423+1921 B

Componente originario normalizzato	AB		Coord arcsec 2000	204215.80+192151.9		Mag	14.7		Calc delta mag	2.4
Calc coord	yes