17166-0027 A 2984 (41 Oph)

17^h 16^m 36.69^s -00° 26' 43.1" P.A. 27.00 sep 0.7 mag 4.92,7.51 Sp K1IV dist. 63.09 pc (205.8 l.y.)

Coord 2000	17166-0027	Discov num	A 2984	Comp		Coord arcsec 2000	17 16 36.69 -00 26 43.1
Date first	1915	Date last	2021	Obs	94
Pa first	298	Pa last	26.7	P.A. Now (θ)	27.7°
Sep first	0.5	Sep last	0.677	Sep. Now (ρ)	0.571"
Mag pri	4.92	Mag sec	7.51	delta mag (ΔM)	2.59	Spectral class	K1IV (yellow-orange)
Pri motion ra	-031	Sec motion ra	-031
Pri motion dec	-073	Sec motion dec	-073
Notes	N O (See Notes, Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	41 Oph	Constellation	Ophiuchus	SAO	141586	HIP	84514
Tycho2	5066-01267-1	HD	156266	HR	6415	GC	23320
ADS	10429	BD	BD-00 3255	Flamsteed	41 Ophiuchi	Flamsteed name	41 Oph
Distance	63.09	Distance ly	205.8

ORBITAL ELEMENTS

Period (P)	140.76y	± 0.23	Periastron (T)	1890.53y	± 0.36	Semi-major axis (a)	0.959a	± 0.008
Eccentricity (e)	0.866	± 0.003	Inclination (i)	65.1°	± 0	Longitude of periastron (ω)	287.5°	± 0
Node (Ω)	220.5°	± 0	Notes	n		Reference	Tok2015c
Equinox	2000		Last observation	2014		Grade	3	(1=Definitive, 9=Indet.)

label	theta	rho
2000	8.9	0.928
2001	9.5	0.922
2002	10.1	0.916
2003	10.6	0.908
2004	11.3	0.901
2005	11.9	0.892
2006	12.5	0.883
2007	13.1	0.874
2008	13.8	0.864
2009	14.5	0.852
2010	15.2	0.841
2011	15.9	0.828
2012	16.6	0.814
2013	17.4	0.799
2014	18.2	0.784
2015	19.0	0.767
2016	19.8	0.749
2017	20.7	0.729
2018	21.7	0.708
2019	22.7	0.685
2020	23.8	0.660
2021	25.0	0.633
2022	26.3	0.603
2023	27.7	0.571
2024	29.4	0.534
2025	31.2	0.494
2026	33.5	0.448
2027	36.3	0.394
2028	40.0	0.331
2029	45.9	0.254
2030	58.1	0.156

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

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

WDS 17166-0027 A 2984 (41 Oph) : NOTES

discov_num	notes	refcode
A 2984	41 Oph. A premature orbit has been computed.	Vou1951

REFERENCES

refcode	metd	author	reference
Tok2015c	orb+j	Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P.	2015AJ....150...50T
Tok2015c	+St	AJ 150, 50, 2015 (some measures corrected in Tok2017b)	2017AJ....154..110T
Vou1951	Ma -	Voute, J.G.	1951RA......2..319V
Vou1951		Vatican Obs. Richerche Astron. 2, 319, 1951

DISCOVERER

idgroup	discov	author
1	A	Aitken, R.G.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
17166-0027	A 2984		2005	84	11	1.0	4.92	7.51	K1IV	NOD	171636.69-002643.1
17166-0027	A 2984		2008	87	12	1.0	4.92	7.51	K1IV	NOD	171636.69-002643.1
17166-0027	A 2984		2009	89	15	0.8	4.92	7.51	K1IV	NOD	171636.69-002643.1
17166-0027	A 2984		2014	90	18	0.8	4.92	7.51	K1IV	NO	171636.69-002643.1
17166-0027	A 2984		2016	91	21	0.8	4.92	7.51	K1IV	NO	171636.69-002643.1
17166-0027	A 2984		2017	92	22	0.7	4.92	7.51	K1IV	NO	171636.69-002643.1
17166-0027	A 2984		2019	93	24	0.7	4.92	7.51	K1IV	NO	171636.69-002643.1
17166-0027	A 2984		2021	94	27	0.7	4.92	7.51	K1IV	NO	171636.69-002643.1

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

WDS 17166-0027 A 2984 (41 Oph) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 17166-0027 A 2984 (41 Oph) : MEASURES

No records found.

WDS 17166-0027 (41 Oph) : VIRTUAL EYEPIECE

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WDS 17166-0027 (41 Oph) : ALADIN DSS IMAGE @ 17^h 16^m 36.69^s -00° 26' 43.1"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 17166-0027 A 2984 (41 Oph) : 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		17166-0027	A 2984		27	0.7
Show		17142-0038	YMG 87		171	0.5	39
Show		17165+0113	HJ 854		357	20.7	46
Show		17126+0043	UC 3304		68	12.6	62
Show		17124+0019	UC 3303		188	10.4	64
Show		17162+0131	UC 3312		262	45.7	65
Show		17168+0133	TDT 296	AB	84	0.8	67
Show		17168+0133	GII 243	Aa,Ab	143	0.2	67
Show		17168+0133	TDT 296	AC	19	3.7	67
Show		17210-0014	RST5079	AB	63	1.3	67
Show		17210-0014	GII 245	Aa,Ab	119	0.1	67
Show		17211+0034	CVR 860		78	26.9	68
Show		17214+0042	RST5429		305	1.6	74
Show		17117-0033	LDS4724		273	15.3	74
Show		17127+0132	CLZ 70		145	22.4	88
Show		17163-0106	KPP2779		228	6.4	93
Show		17211+0127	STF2150	AB	214	11.7	94
Show		17211+0127	STF2150	AC	56	160.8	94
Show		17187+0157	LDT 14	Ba,Bb	55	0.5	95
Show		17187+0157	LDS 991	AB	139	13.0	95
Show		17229-0009	SHN 219		-1	0.1	96
Show		17102-0046	BU 124		261	0.9	99
Show		17177+0207	BAL1934		235	12.6	102
Show		17162+0211	CHR 61		68	0.2	105
Show		17181-0117	SKF 441		165	9.3	107
Show		17240-0050	STF2156		36	3.8	113
Show		17241-0033	KPP1164		202	9.1	113
Show		17090-0033	KPP 393		19	3.7	115
Show		17207+0207	UC 3329		304	32.2	117
Show		17088+0002	A 2237		67	0.9	120
Show		17215+0203	BAL1935		26	18.7	123
Show		17214+0206	TDT 318		17	0.4	123
Show		17135+0221	UC 3307		185	17.8	124
Show		17250+0108	RST5431	AB	161	2.7	132
Show		17250+0108	SCA 199	Aa,Ab	159	0.2	132
Show		17230+0157	J 3211		144	4.0	134
Show		17173+0239	BAL1933		60	14.8	134
Show		17255+0030	RST5432		187	0.2	134
Show		17236+0149	J 2505		137	1.6	134
Show		17184-0147	BAG 51		300	0.5	137
Show		17075+0035	KPP1569		307	11.8	137
Show		17174+0245	SKF1593		110	14.0	139
Show		17262-0010	A 1150		124	2.7	146
Show		17082+0143	AG 208		304	12.3	148
Show		17066+0039	BU 823	AB	178	1.1	151
Show		17066+0039	TOK 52	Ba,Bb	342	0.1	151
Show		17066+0039	BU 823	AB,C	84	172.8	151
Show		17145-0202	BAL 573		59	5.4	152
Show		17168+0259	A 2239		289	3.4	153
Show		17164-0206	CVR 198		149	102.4	153
Show		17119-0151	LPM 629		345	0.6	156

WDS 17166-0027 : COMPONENTS

	A
B	pa=26.7° sep=0.68"

17166-0027 A

Componente originario normalizzato	AB	Name	41 Oph	Coord arcsec 2000	171636.69-002643.1	Mag	4.92
Spectral class	K1IV (yellow-orange)	PmRA	-31.00	PmDE	-73.0	SAO	141586
HIP	84514	Tycho2	5066-01267-1	HD	156266	HR	6415
GC	23320	BD	BD-00 3255	Flamsteed	41 Ophiuchi	Flamsteed name	41 Oph

Tycho2

Tycho2	5066-01267-1	Pflag	P	RAmdeg	259.15286365	DEmdeg	-0.44529700
PmRA	-31.0	PmDE	-73.1	E RAmdeg	3	E DEmdeg	4
E pmRA	1.3	E pmDE	1.2	EpRAm	1991.63	EpDEm	1991.20
Num	6	Q RAmdeg	2.7	Q DEmdeg	1.5	Q pmRA	2.5
Q pmDE	1.6	BTmag	6.319	E BTmag	0.014	VTmag	4.915
E VTmag	0.009	Prox	11	TYC	T	HIP	84514
CCDM	A	RAdeg	259.15293583	DEdeg	-0.44514222	EpRA 1990	1.70
EpDE 1990	1.33	E RAdeg	3.4	E DEdeg	3.7	Posflg	D
Corr	0.2

SAO

SAO	141586	DelFlag		RA1950		PmRA1950	-0.0017
DE1950		PmDE1950	-0.067	Vmag	4.8	SpType	K0
Double code		Source	70	CatNum	23320	DM	BD-00 3255
DMcomp		BDsup		HD	156266	M HD	0
GC	23320	RA1950rad	4.51185959	DE1950rad	-0.00681278	PmRA2000	-0.0015
PmDE2000	-0.066

Hipparcos

Catalog	H	HIP	84514	Proxy	H	RAhms	17 16 36.71
DEdms	-00 26 42.5	Vmag	4.72	VarFlag		R Vmag	G
RAdeg	259.153	DEdeg	-0.445142	AstroRef	A	Plx	14.97
CCDM	17166-0027	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	0	Rho	0.973	HD	156266	BD	BD-00 3255
CD		CP		Dm number	-00 3255	VIred	1.09
SpType	K2III	R SpType		Coord arcsec 2000	171636.71-002642.5

Hipparcos 2

HIP	84514	Sn	15	So	3	Nc	2
RArad	4.5230720743	DErad	-0.0077691929	Plx	15.85	PmRA	-31.46
PmDE	-63.13	E RArad	0.56	E DErad	0.41	E Plx	0.57
E pmRA	0.77	E pmDE	0.53	Hpmag	4.8905	E Hpmag	0.0006
SHp	0.005	VA	0	BV	1.119	E BV	0.053
VI	1.09

CCDM

Ccdm	17166-0027	RComp		Comp	A	Note1
Note2		Discov num		DRAs	0.70	DDEs	17.3
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	4.9	Sp	K0	PmNote	*
PmRA	-26	PmDE	-67	Dm number	-00 3255	Cat1	BD
Name2	-00 2186	Cat2	AGK2/3	HD	156266	M HD
ADS BDS	A10429	M ADS BDS		N IDS		IDS	17114S0020A
HIC	84514

17166-0027 B

Componente originario normalizzato	AB		Coord arcsec 2000	171636.71+002643.7		Mag	7.51		PmRA	-31.00
PmDE	-73.0		Calc delta mag	2.59		Calc coord	yes

CCDM

Ccdm	17166-0027	RComp		Comp	B	Note1	*
Note2		Discov num	A 2984	DRAs		DDEs
R dRAs		Year	1959	Theta	346	Rho	1.0
Obs	99	Vmag	7.9	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A10429	M ADS BDS		N IDS		IDS	17114S0020B
HIC	84514