17210-2107 TNN 8 AC

Coord 2000	17210-2107		Discov num	TNN   8		Comp	AC		Coord arcsec 2000	17 21 00.37 -21 06 46.5
Date first	2004		Date last	2004		Obs	1
Pa first	261		Pa last	261.1		P.A. Now (θ)	261.1°
Sep first	10.8		Sep last	10.79		Sep. Now (ρ)	10.79"
Mag pri	3.07		Mag sec	13.74		delta mag (ΔM)	10.67		Spectral class	F2V (yellow-white)
Pri motion ra	+256		Sec motion ra
Pri motion dec	-211		Sec motion dec
Notes	N K (See Notes, K-band or other infrared magnitudes)

Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Xi Oph	185296	17 21 00 -21 06 46	DON 832 AB	2016	18	26	4.1	4.40	8.90	4.50	Y
Show		185296	17 21 00 -21 06 46	TNN 8 AC	2004	1	261	10.8	3.07	13.74	10.67		<===

Triple system
3 estimated visually detectable stars in this system

Constellation	Ophiuchus		SAO	185296		HIP	84893		Tycho2	6246-00664-1
HD	156897		HR	6445		GC	23423		GL	Gl 670A
BD	BD-20 4731		Bayer	Xi Ophiuchi		Bayer name	Xi Oph		Flamsteed	40 Ophiuchi
Flamsteed name	40 Oph		Distance	17.36		Distance ly	56.63		Bayer greek	ξ Oph

discov_num	notes	refcode
DON 832	xi Oph = 40 Oph

refcode	metd	author	reference
Don1937	Ma j	Donner, H.F.	1937MmRAS..65...51R
Don1937		MemRAS 65, 51, 1937
Don1955	Ma -	Donner, H.F.	1955POMic..11....1R
Don1955		Pub. Univ. Michigan Obs. 11, 1, 1955
Don1964	Ma j	Donner, H.F.	1964POMic...9...73R
Don1964		Pub. Univ. Michigan Obs. 9, 73, 1964
Tnn2010	A j	Tanner, A.M., Gelino, C.R., & Law, N.M.	2010PASP..122.1195T
Tnn2010		PASP 122, 1195, 2010

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
17210-2107	TNN 8	AC	2004	1	261	10.8	3.07	13.74	F2V	N K	172100.37-210646.5

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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

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS