16429+3855 STF 2093 AB (Eta Her)

16^h 42^m 53.76^s +38° 55' 20.1" P.A. 266.00 sep 116.4 mag 3.58,11.72 Sp G8IIIb dist. 33.31 pc (108.66 l.y.)

Coord 2000	16429+3855	Discov num	STF2093	Comp	AB	Coord arcsec 2000	16 42 53.76 +38 55 20.1
Date first	1873	Date last	2020	Obs	16
Pa first	261	Pa last	265.9	P.A. Now (θ)	265.9°
Sep first	113.7	Sep last	116.43	Sep. Now (ρ)	116.43"
Mag pri	3.58	Mag sec	11.72	delta mag (ΔM)	8.14	Spectral class	G8IIIb (yellow)
Pri motion ra	+035	Sec motion ra	+001
Pri motion dec	-085	Sec motion dec	-007
Notes	N S (See Notes, Parallax indidates non-physical)

rPM=0.926

This double is not physical.

16429+3855 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Eta Her	65504	16 42 54 +38 55 20	STF 2093 AB	2020	16	266	116.4	3.58	11.72	8.14		<===
Show		65504	16 42 54 +38 55 20	VLM 5 AC	2015	6	284	84.0	3.58	13.94	10.36

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	Eta Her	Var name	NSV7934 Her	Constellation	Hercules	SAO	65504
HIP	81833	Tycho2	3070-01595-1	Gaia DR2	1352588216301488000	HD	150997
HR	6220	GC	22502	BD	BD+39 3029	Bayer	Eta Herculis
Bayer name	Eta Her	Flamsteed	44 Herculis	Flamsteed name	44 Her	FK5	626
Distance	33.31	Distance ly	108.66	Bayer greek	η Her

WDS 16429+3855 STF 2093 AB (Eta Her) : NOTES

discov_num	notes	refcode
STF2093	eta Her = 44 Her. Aa in direction of C and 2/3 the distance.
	NPOI Limb-darkened diameter 2.42 +/- 0.07 mas,	NOI1999
	R = 8.9 +/- 0.3 \rsun.
	Fainter than C.
	Smyth suspected a close companion to A (1842.53, 150deg, 0".3) but	Smy1844
	this pair has never been confirmed by larger telescopes.

REFERENCES

refcode	metd	author	reference
NOI1999	not j	Nordgren, T.E., Germain, M.E., Benson, J.A., Mozurkewich, D., Sudol, J.J., Elias,	1999AJ....118.3032N
NOI1999		II, N.M., Hajian, A.R., White, N.M., Hutter, D.J., Johnston, K.J., Gauss, F.S.,	.
NOI1999		Armstrong, J.T., Pauls, T.A. & Rickard, L.J.	.
NOI1999		AJ 118, 3032, 1999	.
Smy1844	Ma -	Smyth, W.H.	1844QB43.S66.......
Smy1844		Cycle of Celestial Objects 2, 1844

DISCOVERER

idgroup	discov	author
1	STF	Struve, F.G.W.
34	VLM	Vollmann, W.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
16429+3855	STF2093	AB	2006	9	266	116.3	3.58	12.50	G8IIIb	N D	164253.76+385520.1
16429+3855	STF2093	AB	2012	11	266	115.9	3.58	11.72	G8IIIb	N D	164253.76+385520.1
16429+3855	STF2093	AB	2013	12	265	116.7	3.58	11.72	G8IIIb	N D	164253.76+385520.1
16429+3855	STF2093	AB	2014	14	267	116.6	3.58	11.72	G8IIIb	N	164253.76+385520.1
16429+3855	STF2093	AB	2020	16	266	116.4	3.58	11.72	G8IIIb	N	164253.76+385520.1

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

WDS 16429+3855 STF 2093 AB (Eta Her) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 16429+3855 STF 2093 AB (Eta Her) : MEASURES

No records found.

WDS 16429+3855 (Eta Her) : 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 16429+3855 (Eta Her) : ALADIN DSS IMAGE @ 16^h 42^m 53.76^s +38° 55' 20.1"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 16429+3855 STF 2093 AB (Eta Her) : 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		16429+3855	STF2093	AB	266	116.4
Show		16429+3855	VLM 5	AC	284	84.0
Show		16422+3907	OL 214		278	5.1	14
Show		16418+3850	LDS4689		318	175.5	14
Show		16428+3831	COU1283		65	0.8	25
Show		16450+3842	COU1284		347	0.1	29
Show		16450+3925	GRV1126		348	25.1	45
Show		16407+3939	ES 2225		132	2.3	53
Show		16388+3923	UC 221		227	17.4	56
Show		16386+3820	STF2080	AB	56	1.0	62
Show		16386+3820	STF2080	AC	221	107.4	62
Show		16386+3820	STF2080	AD	80	398.0	62
Show		16422+3753	HDS2372		244	0.1	64
Show		16442+3750	CVR 190		148	87.9	67
Show		16381+3935	HDS2355		324	0.6	69
Show		16400+3958	GRV1124		219	8.7	72
Show		16415+4007	J 1124		276	3.9	73
Show		16424+3742	SLW1193		305	11.8	74
Show		16405+4020	ES 1647		23	3.1	90
Show		16352+3859	LDS 985		86	56.6	91
Show		16399+3731	HJ 587		282	20.0	92
Show		16429+4028	CVR 838		56	22.9	93
Show		16437+3724	CRB 115		146	15.0	93
Show		16420+4031	BRT 339		280	4.8	97
Show		16364+3748	LDS4680		261	21.2	102
Show		16495+4005	CVR1676		309	3.5	104
Show		16505+3800	COU1285		228	1.7	106
Show		16333+3855	STF2067		297	2.9	113
Show		16456+3705	ROE 49		80	10.7	116
Show		16392+3707	SLW1191		96	155.2	117
Show		16363+3727	GRV1222		343	21.2	118
Show		16377+3712	NSN 58		239	23.4	120
Show		16425+4100	TDT 41		329	0.5	125
Show		16454+3651	SKF 263		13	5.8	128
Show		16352+3721	PAR 2		337	6.5	132
Show		16327+3959	STF2065	AB	215	32.0	135
Show		16327+3959	STF2065	AC	24	79.5	135
Show		16315+3920	SLW1183		72	106.2	135
Show		16327+3752	CVR 832		218	12.9	136
Show		16422+4112	STF2091		328	0.4	137
Show		16312+3849	COU1282		273	2.6	138
Show		16326+4007	STT 313		128	0.9	140
Show		16318+3805	CBL 508		250	26.0	140
Show		16542+3805	KPP2518		7	22.7	143
Show		16321+4014	ES 1646		120	4.6	149
Show		16354+3655	BU 952	AB	151	3.2	150
Show		16354+3655	BU 952	AD	265	91.9	150
Show		16354+3655	BU 952	BC	194	5.2	150
Show		16309+3804	STF2059		179	0.3	150
Show		16381+3636	SKF1762		267	1.3	151
Show		16299+3915	TDS9931		307	0.5	153

WDS 16429+3855 : COMPONENTS

	A	B
B	pa=264.7° sep=90.73"
C	pa=287.4° sep=66.50"	pa=43.6° sep=38.97"

16429+3855 A

Name	Eta Her	Coord arcsec 2000	164253.76+385520.1	Mag	3.58	Spectral class	G8IIIb (yellow)
PmRA	35.00	PmDE	-85.0	SAO	65504	HIP	81833
Tycho2	3070-01595-1	HD	150997	HR	6220	GC	22502
BD	BD+39 3029	Bayer	Eta Herculis	Bayer name	Eta	Flamsteed	44 Herculis
Flamsteed name	44 Her	FK5	626

Tycho2

Tycho2	3070-01595-1	Pflag		RAmdeg	250.72402056	DEmdeg	38.92225677
PmRA	35.6	PmDE	-84.5	E RAmdeg	3	E DEmdeg	3
E pmRA	0.6	E pmDE	0.6	EpRAm	1991.17	EpDEm	1991.25
Num	18	Q RAmdeg	0.7	Q DEmdeg	0.7	Q pmRA	0.5
Q pmDE	0.5	BTmag	4.632	E BTmag	0.014	VTmag	3.577
E VTmag	0.009	Prox	999	TYC	T	HIP	81833
CCDM		RAdeg	250.72391361	DEdeg	38.92245444	EpRA 1990	1.58
EpDE 1990	1.58	E RAdeg	3.3	E DEdeg	3.2	Posflg
Corr	-0.1

SAO

SAO	65504	DelFlag		RA1950		PmRA1950	0.0028
DE1950		PmDE1950	-0.083	Vmag	3.6	SpType	K0
Double code		Source	74	CatNum	626	DM	BD+39 3029
DMcomp		BDsup		HD	150997	M HD	0
GC	22502	RA1950rad	4.3684703	DE1950rad	0.68096349	PmRA2000	0.0032
PmDE2000	-0.081

Hipparcos

Catalog	H	HIP	81833	Proxy		RAhms	16 42 53.74
DEdms	+38 55 20.9	Vmag	3.48	VarFlag		R Vmag	H
RAdeg	250.724	DEdeg	38.9225	AstroRef		Plx	29.11
CCDM	16428+3855	N CCDM	I	Nsys	1	Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD	150997	BD	BD+39 3029
CD		CP		Dm number	+39 3029	VIred	0.89
SpType	G8III-IV	R SpType		Coord arcsec 2000	164253.74+385520.9

Hipparcos 2

HIP	81833	Sn	5	So	0	Nc	1
RArad	4.3759577535	DErad	0.6793250957	Plx	30.02	PmRA	35.41
PmDE	-85.3	E RArad	0.09	E DErad	0.09	E Plx	0.11
E pmRA	0.09	E pmDE	0.1	Hpmag	3.6411	E Hpmag	0.0004
SHp	0.004	VA	0	BV	0.916	E BV	0.007
VI	0.89

16429+3855 B

Coord arcsec 2000	164246.02+385511.8		Mag	11.72		PmRA	1.00		PmDE	-7.0
Calc delta mag	8.14		Calc coord	yes

16429+3855 C

Coord arcsec 2000	164248.32+385540.0		Mag	13.94		PmRA	-3.00		PmDE	-4.0
Calc delta mag	10.36		Calc coord	yes