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Doubles in session

Current system

17346+0935
STFA 34 AB
53 Oph

Selections

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Binocular doubles
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Triple Systems
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Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

17346+0935 STFA 34 AB (53 Oph)

17^h 34^m 36.69^s +09° 35' 12.2" P.A. 189.00 sep 41.3 mag 5.80,7.50 Sp A2V dist. 103.52 pc (337.68 l.y.)

Coord 2000	17346+0935		Discov num	STFA 34		Comp	AB		Coord arcsec 2000	17 34 36.69 +09 35 12.2
Date first	1800		Date last	2019		Obs	96
Pa first	196		Pa last	189.2		P.A. Now (θ)	189.2°
Sep first	42.6		Sep last	41.314		Sep. Now (ρ)	41.314"
Mag pri	5.80		Mag sec	7.50		delta mag (ΔM)	1.7		Spectral class	A2V (white)
Pri motion ra	+006		Sec motion ra	+002
Pri motion dec	-010		Sec motion dec	-008
Notes	N (See Notes)

rPM=0.383

Nature of this double is uncertain.

17346+0935 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		122526	17 34 37 +09 35 12	YSC 63 Aa,Ab	2013	4	281	0.4	5.80	10.10	4.30
Show	53 Oph	122526	17 34 37 +09 35 12	STFA 34 AB	2019	96	189	41.3	5.80	7.50	1.70		<===
Show		122526	17 34 37 +09 35 12	STFA 34 AC	2013	10	343	96.6	5.80	11.90	6.10
Show		122526	17 34 37 +09 35 12	STFA 34 AD	2020	8	213	127.0	5.80	11.98	6.18
Show			17 34 36 +09 34 32	STFA 34 BD	2015	11	223	90.6	7.50	11.98	4.48

Quintuple system
4 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	53 Oph		Var name	f Oph		Constellation	Ophiuchus		SAO	122526
HIP	85998		Tycho2	0996-00317-1		Gaia DR2	4490874571284776832		HD	159480
HR	6548		GC	23824		ADS	10635		BD	BD+09 3424
Flamsteed	53 Ophiuchi		Flamsteed name	53 Oph		Distance	103.52		Distance ly	337.68