18024-2302 SNA 77 AJ

Coord 2000	18024-2302		Discov num	SNA  77		Comp	AJ		Coord arcsec 2000	18 02 23.55 -23 01 50.9
Date first	1998		Date last	2015		Obs	3
Pa first	166		Pa last	165.4		P.A. Now (θ)	165.4°
Sep first	6.3		Sep last	6.45		Sep. Now (ρ)	6.45"
Mag pri	7.31		Mag sec	12.86		delta mag (ΔM)	5.55		Spectral class	O7.5V (blue)
Pri motion ra	-000		Sec motion ra
Pri motion dec	-009		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		186145	18 02 24 -23 01 51	SNA 77 Aa,Ab	2013	2	248	0.0	7.40	9.80	2.40
Show	HD 164492	186145	18 02 24 -23 01 51	H N 40 AB	2017	24	20	6.2	7.59	10.40	2.81
Show		186145	18 02 24 -23 01 51	H N 6 AC	2019	35	212	10.7	7.59	8.66	1.07
Show		186145	18 02 24 -23 01 51	H N 6 AE	2017	6	205	16.2	7.59	12.60	5.01
Show		186145	18 02 24 -23 01 51	HLD 175 AF	2017	8	108	22.1	7.59	14.30	6.71
Show		186145	18 02 24 -23 01 51	H N 6 AG	2017	5	212	40.7	7.59	13.40	5.81
Show		186145	18 02 24 -23 01 51	TRN 26 AH	2013	3	345	1.5	7.59	13.00	5.41
Show		186145	18 02 24 -23 01 51	SNA 77 AI	2013	1	43	3.1	7.31	11.54	4.23
Show		186145	18 02 24 -23 01 51	SNA 77 AJ	2015	3	165	6.5	7.31	12.86	5.55		<===
Show			18 02 23 -23 01 60	H N 6 CD	2015	14	280	2.4	8.66	10.70	2.04
Show			18 02 23 -23 01 60	H N 6 CE	2015	6	191	6.0	8.66	12.60	3.94
Show			18 02 23 -23 01 60	H N 6 CF	2015	5	85	26.8	8.66	14.30	5.64
Show			18 02 23 -23 01 60	H N 6 CG	2017	5	212	30.0	8.66	13.40	4.74

11-fold system
10 estimated visually detectable stars in this system

Var name	V3791 Sgr		Constellation	Sagittarius		SAO	186145		HIP	88333
Tycho2	6842-00270-1		Gaia DR2	4069268658691324672		HD	164492		CD	CD-2313804
Distance	230.95		Distance ly	753.36

discov_num	notes	refcode
SNA 77	Aa,Ab: HD 164492A is the center of a wide multiple system. We detected
	two additional faint companions at 3.1" and 6.5", and further resolved
	A into a 25mas pair with a rather faint companion (dH=3.2). The	Cti1977
	object was reported as RV variable by Conti et al. (1977) but this is	Cii2012
	not confirmed by Chini et al. (2012).	Sna2014

refcode	metd	author	reference
Cii2012	not -	Chini, R., Hoffmeister, V.H., Nasseri, A., Stahl, O., & Zinnecker, H.	2012MNRAS.424.1925C
Cii2012		MNRAS 424, 1925, 2012
Cti1977	-	Conti, P., Leep, E.M., & Lorre, J.	1977ApJ...214..759C
Cti1977		ApJ 214, 759, 1977
Sna2014	Kv j	Sana, H., LeBouquin, J.-B., Lacour, S., Berger, J.-P., Duvert, G., Gauchet, L.,	2014ApJS..215...15S
Sna2014	+A	Norris, B., Olofsson, J., Pickel, D., Zins, G., Absil, O., de Koter, A.,
Sna2014		Kratter, K., Schnurr, O., & Zinnecker, H.
Sna2014		ApJS 215, 15, 2014
Sna2014		(NACO companions in Table 6 assumed physical if quoted probability of spurious
Sna2014		detection <10%, optical if >90%, otherwise indeterminate)

idgroup	discov	author
1	HLD	Holden, E.S.
36	TRN	Turner, N.H., ten Brummelaar, T.A., & Mason, B.D.
37	TRN	Turner, N.H., ten Brummelaar, T.A., McAlister, H.A., Mason, B.D., Hartkopf, W.I.,
37	TRN	& Roberts, L.C.
38	TRN	Turner, N.H., ten Brummelaar, T.A., Roberts, L.C., Mason, B.D., Hartkopf, W.I., &
38	TRN	Gies, D.R.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18024-2302	SNA 77	AJ	2012	1	164	6.5	7.31	12.86	O7.5V	N K	180223.55-230150.9
18024-2302	SNA 77	AJ	2015	3	165	6.5	7.31	12.86	O7.5V	N K	180223.55-230150.9

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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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