18035+4032 COU 1785 (HD 165311)

18^h 03^m 31.83^s +40° 32' 00.6" P.A. 30.00 sep 0.2 mag 8.70,8.90 Sp F5

Coord 2000	18035+4032	Discov num	COU1785	Comp		Coord arcsec 2000	18 03 31.83 +40 32 00.6
Date first	1978	Date last	2016	Obs	20
Pa first	50	Pa last	30.4	P.A. Now (θ)	45.9°
Sep first	0.2	Sep last	0.166	Sep. Now (ρ)	0.186"
Mag pri	8.70	Mag sec	8.90	delta mag (ΔM)	0.2	Spectral class	F5 (yellow-white)
Pri motion ra	-005	Sec motion ra
Pri motion dec	+005	Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 165311		Constellation	Hercules		SAO	47175		Tycho2	3106-00845-1
Gaia DR2	4611379808736923264		HD	165311

ORBITAL ELEMENTS

Period (P)	45.72y	± 0.5	Periastron (T)	1995y	± 0.5	Semi-major axis (a)	0.135a	± 0.002
Eccentricity (e)	0.483	± 0.003	Inclination (i)	65.7°	± 1	Longitude of periastron (ω)	147°	± 3
Node (Ω)	52.8°	± 1	Notes	n		Reference	Doc2008a
Equinox	2000		Last observation	2005		Grade	3	(1=Definitive, 9=Indet.)

label	theta	rho
2000	268.9	0.065
2001	282.3	0.060
2002	297.8	0.056
2003	314.3	0.056
2004	329.7	0.060
2005	342.9	0.066
2006	353.5	0.074
2007	1.9	0.084
2008	8.5	0.094
2009	13.8	0.104
2010	18.2	0.114
2011	21.9	0.123
2012	25.0	0.133
2013	27.8	0.141
2014	30.2	0.149
2015	32.4	0.157
2016	34.5	0.163
2017	36.3	0.169
2018	38.1	0.174
2019	39.7	0.179
2020	41.3	0.182
2021	42.9	0.184
2022	44.4	0.186
2023	45.9	0.186
2024	47.4	0.186
2025	48.9	0.184
2026	50.4	0.181
2027	52.1	0.176
2028	53.8	0.171
2029	55.6	0.164
2030	57.7	0.155

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

Measures: green=micrometric, blue=interferometric, purple=photographic

WDS 18035+4032 COU 1785 (HD 165311) : NOTES

discov_num	notes	refcode
COU1785	Systemic mass is estimated at 3.0 +/- 0.6 Msun, assuming a dynamical
	parallax of 7.32 +/- 0.10 mas. This is consistent with a pair of F5
	dwarfs. There is no Hipparcos parallax for this star.	Doc2008a

REFERENCES

refcode	metd	author	reference
Doc2008a	S j	Docobo, J.A., Tamazian, V.S., Andrade, M., Ling, J.F., Balega, Y.Y.,	2008AJ....135.1803D
Doc2008a	+orb	Lahulla, J.F., & Maximov, A.
Doc2008a		AJ 135, 1803, 2008

DISCOVERER

idgroup	discov	author
1	COU	Couteau, P.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18035+4032	COU1785		2005	18	349	0.1	8.70	8.90	F5	NO	180331.83+403200.6
18035+4032	COU1785		2007	19	2	0.1	8.70	8.90	F5	NOD	180331.83+403200.6
18035+4032	COU1785		2016	20	30	0.2	8.70	8.90	F5	NO	180331.83+403200.6

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

WDS 18035+4032 COU 1785 (HD 165311) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18035+4032 COU 1785 (HD 165311) : MEASURES

No records found.

WDS 18035+4032 (HD 165311) : VIRTUAL EYEPIECE

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

WDS 18035+4032 (HD 165311) : ALADIN DSS IMAGE @ 18^h 03^m 31.83^s +40° 32' 00.6"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18035+4032 COU 1785 (HD 165311) : 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		18035+4032	COU1785		30	0.2
Show		18015+4019	HO 77		312	2.0	27
Show		18018+4052	BVD 259		277	10.6	28
Show		18017+4011	STF2267		280	0.4	30
Show		18058+4054	TDT 677		231	0.5	35
Show		18065+4022	STF2282	AB	83	2.7	36
Show		18065+4022	STF2282	AC	80	2.7	36
Show		18065+4022	STF2282	BC	48	0.2	36
Show		18029+4109	ES 1648		9	3.7	39
Show		17590+4058	BRT 345		138	2.8	58
Show		18079+4002	ES 1649	AB	331	7.8	59
Show		18079+4002	ES 1649	AC	226	24.4	59
Show		18040+3923	L 19		274	0.2	64
Show		18032+3926	MLB 851		34	6.7	66
Show		17592+4115	COU1783		47	2.8	67
Show		18033+3921	STF2275		124	0.3	72
Show		18097+4001	TDT 714		312	0.8	77
Show		18031+4158	DOO 10		292	4.9	79
Show		18007+4145	ES 1558		298	6.3	80
Show		17572+4112	KPP4072		266	1.5	83
Show		17592+3926	COU1458		78	0.4	83
Show		17575+3942	COU1457		7	1.9	87
Show		17569+4115	STF2255		343	9.1	88
Show		18019+4202	DAM 103		206	11.0	92
Show		18026+4204	UC 3480		18	23.8	93
Show		17572+4131	COU1782		190	0.4	94
Show		18117+4020	UC 3526		137	25.0	94
Show		18043+4206	COU1786	Aa,Ab	11	0.2	95
Show		18043+4206	ROE 1	AB	186	24.3	95
Show		18038+3857	LDS4773	AB	304	72.4	95
Show		18077+3904	ES 2018		236	5.7	98
Show		17555+4108	COU1601	Aa,Ab	63	0.5	98
Show		17555+4108	ES 1557	AB	11	11.5	98
Show		17555+4108	ES 1557	AC	216	27.0	98
Show		17555+4108	ES 1557	AD	312	40.1	98
Show		17555+4108	ABH 92	AE	324	71.1	98
Show		18121+4015	LEO 1		146	1.5	100
Show		17550+4107	UC 3444		130	12.0	103
Show		18126+4033	OSO 96		73	2.8	104
Show		17548+4110	RAO 605		104	0.8	106
Show		18063+4213	ROE 18		171	14.9	107
Show		18058+4215	KPP2613		113	24.0	107
Show		17562+3926	BU 417		317	1.0	107
Show		17554+3930	STF2246		100	5.5	112
Show		18126+4123	STF2298	AB	172	1.9	116
Show		18126+4123	STF2298	AC	40	72.9	116
Show		18126+4123	WAL 89	AB,D	71	46.6	116
Show		17538+3951	SLW1216		359	13.9	120
Show		18064+3837	ES 2017		268	2.6	120
Show		17533+4000	BU 130		110	1.6	122
Show		18050+4233	UC 3488		313	4.2	122

WDS 18035+4032 : COMPONENTS

	A
B	pa=24.0° sep=0.16"

18035+4032 A

Componente originario normalizzato	AB	Name	HD 165311	Coord arcsec 2000	180331.83+403200.6	Mag	8.7
Spectral class	F5 (yellow-white)	PmRA	-5.00	PmDE	5.0	SAO	47175
Tycho2	3106-00845-1	HD	165311	DM	BD+40 3270

Tycho2

Tycho2	3106-00845-1	Pflag		RAmdeg	270.88263553	DEmdeg	40.53349337
PmRA	-10.3	PmDE	7.8	E RAmdeg	7	E DEmdeg	7
E pmRA	1.0	E pmDE	1.0	EpRAm	1990.92	EpDEm	1990.98
Num	7	Q RAmdeg	0.7	Q DEmdeg	1.0	Q pmRA	0.7
Q pmDE	1.0	BTmag	9.064	E BTmag	0.017	VTmag	8.541
E VTmag	0.013	Prox	999	TYC	T	HIP
CCDM		RAdeg	270.88266694	DEdeg	40.53347500	EpRA 1990	1.60
EpDE 1990	1.57	E RAdeg	6.7	E DEdeg	6.7	Posflg
Corr	0.0

SAO

SAO	47175	DelFlag		RA1950		PmRA1950	-0.0033
DE1950		PmDE1950	0.01	Vmag	8.1	SpType	F5
Double code		Source	4	CatNum	1645	DM	BD+40 3270
DMcomp		BDsup		HD	165311	M HD	0
GC		RA1950rad	4.72076235	DE1950rad	0.70738199	PmRA2000	-0.0029
PmDE2000	0.01

18035+4032 B

Componente originario normalizzato	AB		Coord arcsec 2000	180331.84+403200.7		Mag	8.9		Calc delta mag	0.2
Calc coord	yes