17140+1621 HO 557 (AK Her)

17^h 13^m 57.81^s +16° 21' 01.0" P.A. 323.00 sep 4.5 mag 8.57,12.00 Sp F8 dist. 106.27 pc (346.65 l.y.)

Coord 2000	17140+1621	Discov num	HO 557	Comp		Coord arcsec 2000	17 13 57.81 +16 21 01.0
Date first	1895	Date last	2016	Obs	18
Pa first	323	Pa last	322.8	P.A. Now (θ)	322.8°
Sep first	4.3	Sep last	4.467	Sep. Now (ρ)	4.467"
Mag pri	8.57	Mag sec	12.00	delta mag (ΔM)	3.43	Spectral class	F8 (yellow-white)
Pri motion ra	+020	Sec motion ra
Pri motion dec	-046	Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Var name	AK Her	Constellation	Hercules	SAO	102668	HIP	84293
Tycho2	1536-01738-1	Gaia DR2	4546891252744542976	HD	155937	BD	BD+16 3130
Distance	106.27	Distance ly	346.65

SUSPECTED ORBITAL ELEMENTS

Identifier	17140+1621 HO 557 A
coord_arcsec_2000	171357.81+162101.0

Period (P)	57.8y	± 8	Periastron (T)		Semi-major axis (a)
Eccentricity (e)	0.16	± 0.06	Inclination (i)	80.8°	Longitude of periastron (ω)	°
Node (Ω)	°		Notes	n	Reference	Pbl2006
Equinox			Last observation		Grade	7	(1=Definitive, 9=Indet.)

Not enought orbital data to create a graph.

WDS 17140+1621 HO 557 (AK Her) : NOTES

discov_num	notes	refcode
HO 557	A is the W UMa-type system AK Her.

REFERENCES

refcode	metd	author	reference
Ho_1883	Ma j	Hough, G.W.	1883MNRAS..43..371H
Ho_1883		MNRAS 43, 371, 1883 (data also in Ho_1890)	1890AN....125....1H
Ho_1884	Ma j	Hough, G.W.	1884MNRAS..44..365H
Ho_1884		MNRAS 44, 365, 1884 (data also in Ho_1890)	1890AN....125....1H
Ho_1885	Ma j	Hough, G.W.	1885MNRAS..45..417H
Ho_1885		MNRAS 45, 417, 1885 (data also in Ho_1890)	1890AN....125....1H
Ho_1886	Ma j	Hough, G.W.	1886MNRAS..46..393H
Ho_1886		MNRAS 46, 393, 1886 (data also in Ho_1890)	1890AN....125....1H
Ho_1887	Ma j	Hough, G.W.	1887AN....116..273H
Ho_1887		AN 116, 273, 1887
Ho_1890	Ma j	Hough, G.W.	1890AN....125....1H
Ho_1890		AN 125, 1, 1890
Ho_1890b	Ma j	Hough, G.W.	1890AJ......9..177H
Ho_1890b		AJ 9, 177, 1890 (some data also in Ho_1890 or Ho_1894b)	1890AN....125....1H
Ho_1894a	Ma -	Hough, G.W.	1894MNRAS..54..251H
Ho_1894a		MNRAS 54, 251, 1894
Ho_1894b	Ma j	Hough, G.W. (HO 304 - 490)	1894AN....135..281H
Ho_1894b		AN 135, 281, 1894
Ho_1894c	Ma -	Hough, G.W. (measure by Dembowski, H.)	1894AN....135..281H
Ho_1894c		AN 135, 281, 1894
Ho_1899a	Ma j	Hough, G.W.	1899AN....149..65H
Ho_1899a		AN 149, 65, 1899
Ho_1899b	Ma -	Hough, G.W. (measure by Burnham, S.W.)	1899AN....149..65H
Ho_1899b		AN 149, 65, 1899
Ho_1907	Ma -	Hough, G.W.	1907PFAO....3c...1D
Ho_1907		Pub. Univ. Penn. 3, Pt. 3, 1907 (measures sent to Doolittle)
Ho_1932A	Ma -	Hough, G.W.	1932QB821.A43......
Ho_1932A		cited in ADS, 1932 (unpublished measures sent to Aitken in manuscript by Fox)

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
17140+1621	HO 557		1999	14	323	4.2	8.00	12.00	F8	NOD	171357.81+162101.0
17140+1621	HO 557		2010	15	322	4.2	8.00	12.00	F8	NOD	171357.81+162101.0
17140+1621	HO 557		2015	16	323	4.5	8.57	12.00	F8	N	171357.81+162101.0
17140+1621	HO 557		2016	18	323	4.5	8.57	12.00	F8	N	171357.81+162101.0

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

WDS 17140+1621 HO 557 (AK Her) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 17140+1621 HO 557 (AK Her) : MEASURES

No records found.

WDS 17140+1621 (AK Her) : VIRTUAL EYEPIECE

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WDS 17140+1621 (AK Her) : ALADIN DSS IMAGE @ 17^h 13^m 57.81^s +16° 21' 01.0"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 17140+1621 HO 557 (AK Her) : 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		17140+1621	HO 557		323	4.5
Show		17126+1609	LDS4725		202	7.5	24
Show		17139+1557	STF2137		144	4.1	24
Show		17110+1622	HEI 168		66	0.8	43
Show		17160+1702	TDT 294		78	0.6	51
Show		17105+1606	GWP2696		16	74.1	52
Show		17136+1716	A 2087		133	0.5	56
Show		17107+1651	HEI 167		98	0.4	56
Show		17105+1650	HEI 166		142	3.4	58
Show		17182+1559	HEI 246		45	1.2	66
Show		17175+1711	HO 651	AB	48	9.9	76
Show		17175+1711	DAM 92	AC	15	15.9	76
Show		17099+1532	DAM 928		134	4.0	77
Show		17097+1532	DAM 923		47	7.7	79
Show		17194+1611	LDS 992		267	6.2	80
Show		17127+1742	LDS4726		321	10.6	83
Show		17111+1739	BPM 677		307	67.9	88
Show		17091+1731	CLZ 69		358	5.0	100
Show		17091+1503	LDS4723		30	1.5	105
Show		17190+1739	LDS4738	AB	212	16.2	107
Show		17190+1739	UC 3323	AC	168	102.2	107
Show		17166+1440	BU 1200		338	0.6	108
Show		17088+1504	DAM 700		55	11.8	108
Show		17084+1738	BPM 675		303	94.9	112
Show		17207+1524	J 452		300	2.8	115
Show		17171+1806	LDS4735	AB	356	46.4	116
Show	Rasalgethi	17146+1423	CHR 139	Aa,Ab	231	0.2	119
Show	Rasalgethi	17146+1423	STF2140	AB	103	4.7	119
Show	Rasalgethi	17146+1423	AGC 16	AC	296	16.6	119
Show	Rasalgethi	17146+1423	STF2140	AD	39	79.2	119
Show		17088+1755	UC 3297		201	43.3	120
Show		17100+1808	GWP2693		102	6.0	122
Show		17126+1821	HLA 13		205	4.0	122
Show		17107+1427	BPM 676		242	77.0	123
Show		17172+1816	LDS4736		311	123.2	125
Show		17213+1521	J 3252		355	7.6	125
Show		17066+1727	BAR 42		3	2.0	125
Show		17088+1802	GWP2691		263	82.3	125
Show		17183+1809	BWL 45		325	0.5	126
Show		17202+1750	UC 3328		240	64.2	127
Show		17081+1447	TDT 224		244	0.5	127
Show		17229+1628	J 1248	AB	142	0.1	129
Show		17229+1628	STF2157	AB,C	208	3.4	129
Show		17120+1833	LDS5173		91	172.4	135
Show		17199+1807	COU2625		9	2.3	135
Show		17235+1654	A 2183	AB	137	1.2	142
Show		17117+1353	DAM 977	BC	45	2.5	152
Show		17117+1353	DAM 977	AB	283	8.3	152
Show		17224+1447	TDT 322		188	1.4	154
Show		17062+1809	GRV1259		26	10.2	155
Show		17231+1454	BU 1284		166	1.9	158

WDS 17140+1621 : COMPONENTS

	A
B	pa=323.9° sep=4.40"

17140+1621 A

Componente originario normalizzato	AB	Var name	AK Her	Coord arcsec 2000	171357.81+162101.0	Mag	8.57
Spectral class	F8 (yellow-white)	PmRA	20.00	PmDE	-46.0	SAO	102668
HIP	84293	Tycho2	1536-01738-1	HD	155937	BD	BD+16 3130

Tycho2

Tycho2	1536-01738-1	Pflag		RAmdeg	258.49093698	DEmdeg	16.35016198
PmRA	28.1	PmDE	-50.6	E RAmdeg	7	E DEmdeg	7
E pmRA	1.3	E pmDE	1.2	EpRAm	1991.19	EpDEm	1991.25
Num	7	Q RAmdeg	2.6	Q DEmdeg	2.6	Q pmRA	2.6
Q pmDE	2.6	BTmag	9.149	E BTmag	0.017	VTmag	8.573
E VTmag	0.013	Prox	999	TYC	T	HIP	84293
CCDM		RAdeg	258.49087167	DEdeg	16.35027694	EpRA 1990	1.76
EpDE 1990	1.76	E RAdeg	6.8	E DEdeg	7.2	Posflg
Corr	0.0

SAO

SAO	102668	DelFlag		RA1950		PmRA1950	0.0019
DE1950		PmDE1950	-0.046	Vmag	8.8	SpType	F8
Double code		Source	28	CatNum	6178	DM	BD+16 3130
DMcomp		BDsup		HD	155937	M HD	0
GC		RA1950rad	4.50172628	DE1950rad	0.28636774	PmRA2000	0.002
PmDE2000	-0.044

Hipparcos

Catalog	H	HIP	84293	Proxy		RAhms	17 13 57.81
DEdms	+16 21 01.0	Vmag	8.5	VarFlag	2	R Vmag	T
RAdeg	258.491	DEdeg	16.3503	AstroRef		Plx	10.47
CCDM	17140+1621	N CCDM	I	Nsys	1	Ncomp	1
MultFlag	X	Source		Qual	S	M HIP
Theta		Rho		HD	155937	BD	BD+16 3130
CD		CP		Dm number	+16 3130	VIred	0.62
SpType	F8Vvar	R SpType		Coord arcsec 2000	171357.81+162101.0

Hipparcos 2

HIP	84293	Sn	1	So	2	Nc	1
RArad	4.5115167489	DErad	0.2853663267	Plx	9.41	PmRA	26.1
PmDE	-48.18	E RArad	1.23	E DErad	1.18	E Plx	1.88
E pmRA	1.47	E pmDE	1.44	Hpmag	8.6056	E Hpmag	0.031
SHp	0.157	VA	1	BV	0.549	E BV	0.015
VI	0.62

CCDM

Ccdm	17140+1621	RComp		Comp	A	Note1
Note2		Discov num		DRAs	-2.19	DDEs	0.4
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag		Sp	F8	PmNote	*
PmRA	25	PmDE	-58	Dm number	+16 3130	Cat1	BD
Name2	+16 1661	Cat2	AGK2/3	HD	155937	M HD
ADS BDS	A10408	M ADS BDS		N IDS		IDS	17095N1628A
HIC	84293

17140+1621 B

Componente originario normalizzato	AB		Coord arcsec 2000	171357.63+162104.6		Mag	12		Calc delta mag	3.43
Calc coord	yes

CCDM

Ccdm	17140+1621	RComp		Comp	B	Note1
Note2		Discov num	HO 557	DRAs		DDEs
R dRAs		Year	1895	Theta	323	Rho	4.5
Obs	8	Vmag	12.0	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A10408	M ADS BDS	N	N IDS		IDS	17095N1628B
HIC	84293