13547+1824 SHJ 169 (Muphrid)

Coord 2000	13547+1824		Discov num	SHJ 169		Comp			Coord arcsec 2000	13 54 41.07 +18 23 51.8
Date first	1822		Date last	2020		Obs	35
Pa first	119		Pa last	84.5		P.A. Now (θ)	84.5°
Sep first	126.2		Sep last	114.89		Sep. Now (ρ)	114.89"
Mag pri	2.72		Mag sec	9.99		delta mag (ΔM)	7.27		Spectral class	G0IV (yellow)
Pri motion ra	-057		Sec motion ra	-040
Pri motion dec	-359		Sec motion dec	+017
Notes	N L U (See Notes, Linear solution, Proper motion indicates non-physical)

rPM=1.035 This double is not physical.

Common name	Muphrid		Constellation	Bootes		SAO	100766		HIP	67927
Tycho2	1470-01157-1		HD	121370		HR	5235		GC	18805
GL	Gl 534		BD	BD+19 2725		Bayer	Eta Bootis		Bayer name	Eta Boo
Flamsteed	8 Bootis		Flamsteed name	8 Boo		FK5	513		Distance	11.4
Distance ly	37.19		Bayer greek	η Boo

Other names

MUFRID

Meaning

reviews (of the lance-bearer)

Period (P)	494.2d		Periastron (T)	28136.2d (1935.91y)		Semi-major axis (a)	36.02m	± 0.56
Eccentricity (e)	0.26		Inclination (i)	115.7°	± 1.6	Longitude of periastron (ω)	326.3°
Node (Ω)	75.2°	± 1.4	Notes	n		Reference	Jnc2005
Equinox			Last observation	1992		Grade	9	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 296.8 0.025 2001-01-01 62.2 0.027 2002-01-01 216.7 0.020 2003-01-01 261.9 0.043 2004-01-01 313.2 0.021 2005-01-01 73.4 0.028 2006-01-01 232.1 0.028 2007-01-01 266.6 0.042 2008-01-01 337.6 0.017 2009-01-01 85.4 0.025 2010-01-01 241.2 0.034 2011-01-01 271.9 0.039 2012-01-01 7.1 0.017 2013-01-01 102.7 0.019 2014-01-01 247.7 0.039 2015-01-01 278.1 0.035 2016-01-01 32.1 0.020 2017-01-01 136.0 0.014 2018-01-01 252.9 0.042 2019-01-01 286.1 0.030 2020-01-01 49.8 0.024 2021-01-01 186.3 0.014 2022-01-01 257.6 0.043 2023-01-01 297.3 0.025 2024-01-01 62.7 0.027 2025-01-01 217.5 0.020 2026-01-01 262.1 0.043 2027-01-01 314.0 0.020 2028-01-01 73.8 0.028 2029-01-01 232.6 0.028 2030-01-01 266.8 0.042		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

Period (P)	1620.3d (4.44y)		Periastron (T)	47179.1d (1988.048y)		Semi-major axis (a)	10.8m	± 2.7
Eccentricity (e)	0.68		Inclination (i)	20.9°	± 4.1	Longitude of periastron (ω)	177.6°
Node (Ω)	6°	± 10	Notes			Reference	Jnc2005
Equinox			Last observation	1992		Grade	9	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 22.1 0.016 2001-01-01 72.1 0.007 2002-01-01 319.2 0.011 2003-01-01 352.0 0.017 2004-01-01 12.3 0.018 2005-01-01 40.4 0.012 2006-01-01 268.3 0.005 2007-01-01 341.3 0.015 2008-01-01 3.5 0.018 2009-01-01 25.5 0.015 2010-01-01 93.4 0.005 2011-01-01 325.8 0.012 2012-01-01 354.8 0.018 2013-01-01 15.0 0.017 2014-01-01 46.7 0.011 2015-01-01 291.9 0.007 2016-01-01 344.7 0.016 2017-01-01 6.1 0.018 2018-01-01 29.2 0.015 2019-01-01 133.0 0.004 2020-01-01 331.2 0.013 2021-01-01 357.4 0.018 2022-01-01 17.8 0.017 2023-01-01 54.8 0.009 2024-01-01 306.1 0.008 2025-01-01 347.9 0.017 2026-01-01 8.6 0.018 2027-01-01 33.3 0.014 2028-01-01 197.7 0.003 2029-01-01 335.8 0.014 2030-01-01 360.0 0.018		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

Period (P)	457.8d		Periastron (T)	48207d (1990.862y)		Semi-major axis (a)	4.81m	± 1.1
Eccentricity (e)	0.062		Inclination (i)	53.9°	± 28.4	Longitude of periastron (ω)	203.5°	± 28.2
Node (Ω)	8.5°	± 35.5	Notes			Reference	Pbx2000a
Equinox			Last observation	1993		Grade	9	(1=Definitive, 9=Indet.)

label theta rho 2000-01-01 337.8 0.004 2001-01-01 233.3 0.003 2002-01-01 174.8 0.004 2003-01-01 87.4 0.003 2004-01-01 19.1 0.005 2005-01-01 334.4 0.004 2006-01-01 228.5 0.003 2007-01-01 172.0 0.004 2008-01-01 81.4 0.003 2009-01-01 17.0 0.005 2010-01-01 330.7 0.004 2011-01-01 224.1 0.004 2012-01-01 169.0 0.004 2013-01-01 75.7 0.003 2014-01-01 14.9 0.005 2015-01-01 326.7 0.004 2016-01-01 220.0 0.004 2017-01-01 165.9 0.004 2018-01-01 70.2 0.003 2019-01-01 12.8 0.005 2020-01-01 322.3 0.003 2021-01-01 216.2 0.004 2022-01-01 162.7 0.004 2023-01-01 65.2 0.003 2024-01-01 10.7 0.005 2025-01-01 317.6 0.003 2026-01-01 212.7 0.004 2027-01-01 159.3 0.004 2028-01-01 60.4 0.003 2029-01-01 8.6 0.005 2030-01-01 312.4 0.003		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

discov_num	notes	refcode
eta Boo	Hipparcos astrometric solution adopted some elements from the orbit of	HIP1997d
	Bertiau (1957).	BFC1957
	Daniel & Burns orbit rejected from Fourth Orbit Catalog	Dni1939
	("amplitude below noise level")	Wor1983
SHJ 169	eta Boo = 8 Boo = Muphrid. A is a long-period spectroscopic binary.
	B is BD+19@2726.
	Optical pair, based on study of relative motion of the components
	using the method of apparent motion parameters.	Kiy2008
	H 6 95.	MEv2010

refcode	metd	author	reference
BFC1957	orb -	Bertiau, F.C.	1957ApJ...125..696B
BFC1957		ApJ 125, 696, 1957
Dni1939	orb -	Daniel, Z. & Burns, K.	.
Dni1939		Pub. AAS 9, 146, 1939
HIP1997d	orb -	Hipparcos	1997yCat.1239....0E
HIP1997d		Hipparcos Catalog, ESA SP-1200, 1997
HIP1997d		(DMSA/O Orbital Solutions)
Jnc2005	orb -	Jancart, S., Jorrisen, A., Babusiaux, C., & Pourbaix, D.	2005A&A...442..365J
Jnc2005		A&A 442, 365, 2005
Kiy2008	-	Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S.	2008SvAL...32..405K
Kiy2008		SvAL 34, 405, 2008
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Pbx2000a	orb -	Pourbaix, D. & Jorissen, A.	2000A&AS..145..161P
Pbx2000a		A&AS 145, 161, 2000
Wor1983	-	Worley, C.E. & Heintz, W.D.	1983PUSNO..24g...1W
Wor1983		Pub. USNO 24, Pt. 7, 1983 (Fourth Orbit Catalog)

idgroup	discov	author
1	SHJ	South, J. & Herschel, J.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
13547+1824	SHJ 169		2007	27	87	113.3	2.72	9.99	G0IV	NLD	135441.11+182354.7
13547+1824	SHJ 169		2008	29	86	112.0	2.72	9.99	G0IV	NLD	135441.11+182354.7
13547+1824	SHJ 169		2011	30	86	113.1	2.72	9.99	G0IV	NLD	135441.11+182354.7
13547+1824	SHJ 169		2012	31	86	113.1	2.72	9.99	G0IV	NL	135441.11+182354.7
13547+1824	SHJ 169		2016	32	85	114.0	2.72	9.99	G0IV	NL U	135441.07+182351.8
13547+1824	SHJ 169		2019	33	85	115.4	2.72	9.99	G0IV	NL U	135441.07+182351.8
13547+1824	SHJ 169		2020	35	85	114.9	2.72	9.99	G0IV	NL U	135441.07+182351.8

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Show	date	username	difficulty	separation	pa_estim	interest	notes
Show	19/04/29	kapp8	very easy	separated	100	scarce interest

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