20521+4438 HER 18

20^h 52^m 03.78^s +44° 37' 28.9" P.A. 85.00 sep 60.7 mag 17.00,17.00

Coord 2000	20521+4438	Discov num	HER 18	Comp		Coord arcsec 2000	20 52 03.78 +44 37 28.9
Date first	1960	Date last	2015	Obs	7
Pa first	80	Pa last	85.1	P.A. Now (θ)	85.1°
Sep first	40.0	Sep last	60.735	Sep. Now (ρ)	60.735"
Mag pri	17.00	Mag sec	17.00	delta mag (ΔM)	0	Spectral class
Pri motion ra	-006	Sec motion ra
Pri motion dec	-012	Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Gaia DR2

2163147741628918400

WDS 20521+4438 HER 18 : NOTES

discov_num	notes	refcode
HER 18	Additional notes may be found in Herbig (1962).	Her1962

REFERENCES

refcode	metd	author	reference
Her1962	Pa -	Herbig, G.H.	1962AdA&A...1...47H
Her1962		Advances Astron. Astrophys. 1, 47, 1962
Her1962		(Exact dates, telescopes, and techniques not given. Default date = decade of
Her1962		publication added.)

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20521+4438	HER 18		2000	3	85	60.7	17.00	17.00		N D	205203.78+443728.9
20521+4438	HER 18		2015	4	85	60.7	17.00	17.00		N	205203.78+443728.9

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WDS 20521+4438 HER 18 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20521+4438 HER 18 : MEASURES

No records found.

WDS 20521+4438 : VIRTUAL EYEPIECE

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WDS 20521+4438 : ALADIN DSS IMAGE @ 20^h 52^m 03.78^s +44° 37' 28.9"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20521+4438 HER 18 : 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		20521+4438	HER 18		85	60.7
Show		20525+4430	BRT2279		5	4.5	9
Show		20532+4423	LSC 94		183	0.3	20
Show		20538+4443	LDS5914		124	6.2	20
Show		20509+4421	CHN 30	AB	92	2.7	21
Show		20509+4421	CHN 30	Aa,Ab	108	0.6	21
Show		20506+4421	CHN 29		52	5.3	23
Show		20512+4415	CHN 31		47	6.7	25
Show		20511+4459	LDS2459		228	43.7	25
Show		20494+4452	TDS1103		200	0.8	32
Show		20549+4451	LDS2466		287	4.8	33
Show		20504+4518	SMA 121		32	11.6	34
Show		20494+4458	GRV 384		222	22.1	35
Show		20542+4508	LDS5915		43	18.0	38
Show		20501+4404	STT 595	AB	48	55.4	41
Show		20501+4404	STG 9	AC	83	102.7	41
Show		20501+4404	FYM 92	AD	242	51.8	41
Show		20501+4404	FYM 92	AE	190	35.2	41
Show		20501+4404	FYM 92	AF	80	46.9	41
Show		20556+4453	COU2648		21	1.3	41
Show		20558+4448	ES 674		94	5.6	42
Show		20541+4507	STT 422		332	2.6	42
Show		20514+4519	ARG 40		250	9.2	43
Show		20563+4447	ES 675	BC	108	3.7	45
Show		20563+4447	ES 675	AB	272	97.4	47
Show		20535+4523	HDS2975		191	0.2	49
Show		20565+4447	TOB 203		329	15.8	49
Show		20500+4521	ES 2702		348	8.6	49
Show		20565+4452	LDS2470		306	13.5	49
Show		20567+4439	BRT2283		339	6.0	50
Show		20504+4525	LDS5912		252	17.4	51
Show		20566+4455	TRN 30		30	3.8	52
Show		20520+4346	STT 416	AB	117	9.6	53
Show		20520+4346	SKF2740	BC	192	73.4	53
Show		20472+4427	COU2424		255	0.5	53
Show		20574+4443	LDS2473		119	15.7	57
Show		20492+4525	COU2646		266	0.4	57
Show		20490+4525	SMA 120		313	4.3	58
Show		20574+4451	LDS2472		254	1.7	58
Show		20485+4519	LDS2456		236	18.0	59
Show		20519+4537	SMA 122		262	7.4	60
Show		20578+4425	LDS2474		235	14.5	61
Show		20579+4442	COU2649		143	0.6	62
Show		20461+4452	ES 30		57	17.1	66
Show		20459+4448	ES 2701		81	50.9	67
Show		20559+4345	COU2543		222	1.6	68
Show		20583+4428	RBR 50		76	0.4	68
Show		20489+4537	HDS2965		282	0.1	69
Show		20476+4347	CHN 28		57	5.0	70
Show		20527+4547	TDT2597		327	1.3	70
Show		20461+4410	BRT2275		10	2.8	71

WDS 20521+4438 : COMPONENTS

	A
B	pa=83.1° sep=43.38"

20521+4438 A

Componente originario normalizzato	AB		Coord arcsec 2000	205203.78+443728.9		Mag	17		PmRA	-6.00
PmDE	-12.0

20521+4438 B

Componente originario normalizzato

Coord arcsec 2000

205207.81+443734.1

Mag

Calc coord

yes