17465+2743 TRN 2 Aa,Ab

Coord 2000	17465+2743		Discov num	TRN   2		Comp	Aa,Ab		Coord arcsec 2000	17 46 27.51 +27 43 14.3
Date first	1998		Date last	2015		Obs	24
Pa first	167		Pa last	254.8		P.A. Now (θ)	254.8°
Sep first	1.4		Sep last	1.78		Sep. Now (ρ)	1.78"
Mag pri	3.49		Mag sec	12.70		delta mag (ΔM)	9.21		Spectral class	G5IV+M4V (yellow/red)
Pri motion ra	-292		Sec motion ra
Pri motion dec	-750		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		85397	17 46 28 +27 43 14	TRN 2 Aa,Ab	2015	24	255	1.8	3.49	12.70	9.21	Y	<===
Show	Mu Her	85397	17 46 28 +27 43 14	STF 2220 A,BC	2016	121	249	35.4	3.49	9.78	6.29
Show		85397	17 46 28 +27 43 14	ABT 14 AD	2002	3	5	321.1	3.49	12.33	8.84
Show			17 46 25 +27 43 01	AC 7 BC	2021	371	27	1.0	10.20	10.70	0.50	Y
Show			17 46 25 +27 43 01	ABT 14 BC,D	2000	2	10	335.0	9.78	12.33	2.55

Quintuple system
5 estimated visually detectable stars in this system

Constellation	Hercules		SAO	85397		HIP	86974		Tycho2	2085-03062-1
HD	161797		HR	6623		GC	24138		ADS	10786
GL	Gl 695A		BD	BD+27 2888		Bayer	Mu Herculis		Bayer name	Mu Her
Flamsteed	86 Herculis		Flamsteed name	86 Her		FK5	667		Distance	8.31
Distance ly	27.11		Bayer greek	μ Her

Period (P)	98.9y	± 22.7	Periastron (T)	1921.1y	± 23.8	Semi-major axis (a)	2.9a	± 0.3
Eccentricity (e)	0.44	± 0.06	Inclination (i)	62.82°	± 4.66	Longitude of periastron (ω)	214°	± 16
Node (Ω)	80.4°	± 1.7	Notes	n		Reference	Rbr2016a
Equinox	2000		Last observation	2015		Grade	5	(1=Definitive, 9=Indet.)

label theta rho 2000 172.8 1.405 2001 179.3 1.382 2002 185.9 1.372 2003 192.6 1.375 2004 199.2 1.391 2005 205.6 1.418 2006 211.7 1.454 2007 217.4 1.498 2008 222.9 1.546 2009 228.0 1.596 2010 232.7 1.646 2011 237.2 1.691 2012 241.5 1.729 2013 245.7 1.756 2014 249.7 1.769 2015 253.7 1.765 2016 257.8 1.740 2017 262.1 1.692 2018 266.6 1.621 2019 271.7 1.525 2020 277.5 1.409 2021 284.5 1.278 2022 293.1 1.141 2023 304.0 1.012 2024 317.7 0.910 2025 334.1 0.854 2026 351.4 0.859 2027 7.3 0.927 2028 20.4 1.042 2029 30.6 1.188 2030 38.4 1.351		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
TRN 2	Aa,Ab: Astrometric orbit, P=65yr, e=0.32 (Heintz 1994) implies	Hei1994a
	a=0.265", does not fit the 1.4" companion of Turner (2001).	Trn2001
	Roberts et al. derive a spectral type for the secondary of M4V +/- 1.
	Using an estimated mass for the primary, they estimate the mass of the
	secondary as 0.32 Msun.	Rbr2016a
	Inclination of this orbit appears to be the same as that of the	XXX2017a
	rotation axis of the primary.
	Mk III Limb-darkened diameter 1.953 +/- 0.039 mas.	MkT2003
	NPOI Limb-darkened diameter 1.880 +/- 0.008 mas, Sp = G5IV,	NOI2018
	R = 1.64 +/- 0.01 \rsun, Teff = 5425 +/- 69 K, L = 2.1 +/- 0.1 \lsun,
	M = 1.09 +/- 0.01 \msun, Age = 7.68 +/- 0.13 Gyr.
STF2220	A: mu Her = 86 Her is a large-amplitude astrometric binary, P = 65y.
	A,BC: LDS1002. HJL 253.	HJL1986
	A,BC: H 4 41.	MEv2010
	A,BC: Additional notes may be found in Baize (1964).	Baz1964
AC 7	BC: Prieur et al. (2014) derive a dynamical parallax of 123.0 mas and
	a total mass of 0.82 +/- 0.07 Msun (based on the revised Hipparcos	VlF2007
	parallax of van Leeuwen 2007).	Pru2014

refcode	metd	author	reference
Baz1964	Ma -	Baize, P.	1964JO.....47....1B
Baz1964	+orb	J. Obs. 47, 1-26, 1964
Hei1994a	orb -	Heintz, W.D.	1994AJ....108.2338H
Hei1994a		AJ 108, 2338, 1994
HJL1986	Pa -	Halbwachs, J.L.	1986A&AS...66..131H
HJL1986		A&AS 66, 131, 1986
HJL1986		(Possible CPM pairs from AGK2/3. Coarse astrometry, incl. mean 1950 dates, added
HJL1986		only for previously unknown pairs. Table 1: HJL 1 - 326, Table 2: HJL1001 - 1113)
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
MkT2003	Km -	Mozurkewich, D., Armstrong, J.T., Hindsley, R., Quirrenbach, A., Hummel, C.A.,	2003AJ....126.2502M
MkT2003	+not	Hutter, D., Johnston, K.J., Hajian, A., Elias, N.M., II, Buscher, D., & Simon, R.
MkT2003		AJ 126, 2502, 2003
NOI2018	not j	Baines, E.K., Armstrong, J.T., Schmitt, H.R., Zavala, R.T., Benson, J.A., Hutter,	2018AJ....155...30B
NOI2018		D.J., Tycner, C. & van Belle, G.T.
NOI2018		AJ 155, 30, 2018
Pru2014	S j	Prieur, J.-L., Scardia, M., Pansecchi, L., Argyle, R., Zanutta, A., & Aristidi, E.	2014AN....335..817P
Pru2014	+orb	AN 335, 817, 2014
Rbr2016a	A j	Roberts, L.C., Jr., Mason, B.D., Aguilar, J., Carson, J., Crepp, J., Beichman, C.,	2016AJ....151..169R
Rbr2016a	+Ac	Brenner, D., Burruss, R., Cady, E., Luszcz-Cook, S., Dekany, R., Hillenbrand, L.,
Rbr2016a	+orb	et al.
Rbr2016a		AJ 151, 169, 2016
Trn2001	Ac j	Turner, N.H., ten Brummelaar, T.A., McAlister, H.A., Mason, B.D., Hartkopf, W.I.,	2001AJ....121.3254T
Trn2001		& Roberts, L.C.
Trn2001		AJ 121, 3254, 2001
VlF2007	-	van Leeuwen, F.	2007A&A...474..653V
VlF2007		A&A 474, 653, 2007
XXX2017a	not -	Grundahl, F., Andersen, M.F., Christensen-Dalsgaard, J., Antoci, V., Kjeldsen, H.,	2017ApJ...836..142G
XXX2017a		Handberg, R., Houdek, G., Bedding, T.R., Palle, P.L., Jessen-Hansen, J., Aguirre,
XXX2017a		V.S., White, T.R., Frandsen, S., Albrecht, S., Andersen, M.I., Arentoft, T.,
XXX2017a		Brogaard, K., Chaplin, W.J., Harpsoe, K., Jorgensen, U.G., Karovicova, I., Karoff,
XXX2017a		C., Rasmussen, P.K., Lund, M.N., Lundkvist, M.S., Skottfelt, J., Sorensen, A.N.,
XXX2017a		Tronsgaard, R. & Weiss, E.
XXX2017a		ApJ 836, 142, 2017

idgroup	discov	author
1	ABT	Abetti, G.
18	AC	Clark, Alvan
23	STF	Struve, F.G.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
17465+2743	TRN 2	Aa,Ab	1998	2	164	1.4	3.42	12.70	G5IV	OD	174627.72+274321.0
17465+2743	TRN 2	Aa,Ab	2006	5	215	1.5	3.49	12.70	G5IV	NO	174627.51+274314.3
17465+2743	TRN 2	Aa,Ab	2015	23	255	1.8	3.49	12.70	G5IV+M4V	NO	174627.51+274314.3

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Radius: auto 0.5" 0.8" 1" 2" 3" 5" 10" 15" 20" 25" 30" 35" 40" 45" 50" 55" 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' 15' 20' 30' 40' 50' 1° 2° 4° 5° 8° Components only

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