12177-6410 JNN 79 AD

Coord 2000	12177-6410		Discov num	JNN  79		Comp	AD		Coord arcsec 2000	12 17 40.15 -64 09 38.9
Date first	2010		Date last	2012		Obs	2
Pa first	285		Pa last	290.1		P.A. Now (θ)	290.1°
Sep first	0.2		Sep last	0.114		Sep. Now (ρ)	0.114"
Mag pri	13.10		Mag sec	15.60		delta mag (ΔM)	2.5		Spectral class	M3.5+M5.5 (red/red)
Pri motion ra	-010		Sec motion ra
Pri motion dec	-014		Sec motion dec
Notes	N V (See Notes, Proper motion indicates physical)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			12 17 40 -64 09 39	JNN 79 AB	2015	6	238	5.2	13.10	13.50	0.40
Show			12 17 40 -64 09 39	JNN 79 AD	2012	2	290	0.1	13.10	15.60	2.50		<===
Show			12 17 39 -64 09 42	JNN 79 BC	2018	3	315	0.6	13.50	15.30	1.80

Quadruple system
4 estimated visually detectable stars in this system

Constellation

Crux

Gaia DR2

6053316942658822272

discov_num	notes	refcode
JNN 79	The two targets 2MASS J12173945-6409418 and J12174012-6409389 are
	physically bound, as shown by common proper motion analysis. However,
	this means that one of the targets likely has an error in the Riaz et
	al. (2006) spectral type determination, since J12174012-6409389 is	Ria2006
	classified as M2 but is fainter than J12174012-6409389, which is
	classified as M3.5. The fact that J12174012-6409389 is fainter holds
	true both in 2MASS and in the AstraLux images. Both components are
	resolved as close binaries with AstraLux, so we consider it a strong
	candidate for a quadruple system, with J12173945-6409418A as the
	primary. Concerning which spectral type determination is incorrect, we
	consider that it is more likely that J12174012-6409389 is mis-
	classified, as the flux ratio to the close companion is closer to
	unity than in the J12174012-6409389 case. We thus set the spectral
	type of J12174012-6409389A to M3+/-1, and determine the other spectral
	types on the basis of flux ratios. Component Bb is not visible in the
	i' data, but becomes visible in z' thanks to the higher Strehl ratio
	and intrinsic brightness of the component. A fifth object is visible
	in the field, but its color reveals it to be a likely background star.	Jnn2012

refcode	metd	author	reference
Jnn2012	Cl j	Janson, M., Hormuth, F., Bergfors, C., Brandner, W., Hippler, S., Daemgen, S.,	2012ApJ...754...44J
Jnn2012	+E2	Kudryavtseva, N., Schmalzl, E., Schnupp, C., & Henning, T.
Jnn2012		ApJ 754, 44, 2012 (some recalibrated measures published in Jnn2014b)	2014ApJS..214...17J
Ria2006	not -	Riaz, B., Gizis, J., & Harvin, J.	2006AJ....132..866R
Ria2006		AJ 132, 866, 2006

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
12177-6410	JNN 79	AD	2010	1	285	0.2	13.10	15.60	M3.5 M5.5		121739.47-640941.8
12177-6410	JNN 79	AD	2012	2	290	0.1	13.10	15.60	M3.5 M5.5	NV	121740.15-640938.9

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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

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

FoV: 30" 1' 5' 15' 30' 1° 2° 4° 5° 8° Limit: 2 3 4 5 10 15 20 25 30 50 100 Primaries only
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Show name coord_2000 discov# comp pa sep dist(') Show 12177-6410 JNN 79 AB 238 5.2 Show 12177-6410 JNN 79 AD 290 0.1 Show 12177-6410 JNN 79 BC 315 0.6 1 Show 12184-6400 HJ 4512 345 33.6 11 Show 12203-6406 RST 584 216 0.7 17 Show 12146-6408 NSN 392 291 21.2 21 Show 12202-6352 TDS8336 7 0.9 25 Show 12210-6354 TOB 56 165 11.4 27 Show 12138-6356 TOB 247 38 22.5 29 Show 12135-6419 TOB 243 179 27.3 30 Show 12140-6427 TOB 251 281 22.2 30 Show 12145-6431 TOB 252 17 21.5 30 Show 12202-6341 FIN 197 83 0.4 34 Show 12221-6427 TDS8353 73 1.1 34 Show 12139-6433 TOB 248 87 12.1 34 Show 12211-6436 TOB 58 286 11.9 35 Show 12131-6428 RST 580 287 0.5 35 Show 12231-6405 RST 589 AB 73 3.8 36 Show 12231-6405 SHT 25 AC 143 8.1 36 Show 12219-6434 TOB 59 5 23.0 37 Show 12138-6343 RST 582 240 0.6 37 Show 12207-6440 RST 585 256 0.5 37 Show 12237-6419 RST 590 343 4.3 41 Show 12239-6406 TDS8365 322 0.6 41 Show 12238-6359 HJ 4516 92 23.3 42 Show 12220-6442 TOB 61 92 32.1 43 Show 12237-6352 JNN 172 EG 75 1.6 44 Show 12237-6352 JNN 172 EH 226 2.3 44 Show 12237-6352 JNN 172 EI 14 4.6 44 Show 12244-6411 TOB 70 109 24.5 44 Show 12116-6435 RST 579 40 0.4 47 Show 12123-6444 BRT1993 152 2.6 49 Show 12208-6458 TOB 55 AB 69 36.0 53 Show 12208-6458 TOB 55 BC 60 24.5 53 Show 12183-6317 HDS1734 275 0.7 53 Show Tupa 12258-6401 MOC 5 AB 289 2.8 54 Show Tupa 12258-6401 MOC 5 AC 41 3.1 54 Show Tupa 12258-6401 MOC 5 AD 92 3.1 54 Show Tupa 12258-6401 MOC 5 AE 305 3.5 54 Show Tupa 12258-6401 MOC 5 AF 31 3.6 54 Show Tupa 12258-6401 MOC 5 AG 147 4.8 54 Show Tupa 12258-6401 MOC 5 AH 3 4.9 54 Show 12122-6327 KOU 7 AB 26 2.9 56 Show 12122-6327 KOU 7 AC 313 9.8 56 Show 12225-6323 TDS8354 212 9.7 57 Show 12235-6453 RST3787 222 1.3 58 Show 12093-6352 RST 576 176 1.1 58 Show 12094-6349 HRG 74 164 2.3 59 Show 12166-6312 SHY 595 AB 109 317.1 59 Show 12087-6357 VOU 13 172 4.3 60 Show 12113-6327 RST3776 321 0.5 60

	A	B	C
B	pa=236.9° sep=5.31"
C	pa=241.7° sep=5.25"	pa=336.6° sep=0.45"
D	pa=310.0° sep=0.06"	pa=56.3° sep=5.29"	pa=61.1° sep=5.23"

Coord arcsec 2000	121740.15-640938.9		Mag	13.1		Spectral class	M3.5 (red)		PmRA	-10.00
PmDE	-14.0

Coord arcsec 2000	121739.47-640941.8		Coord calc	121739.47-640941.8		Mag	13.5		Spectral class	M3 (red)
PmRA	6.00		PmDE	10.0		Calc delta mag	0.4

Coord arcsec 2000	121739.44-640941.4		Mag	15.3		Spectral class	M4 (red)		Calc delta mag	2.2
Calc coord	yes

Coord arcsec 2000	121740.14-640938.9		Mag	15.6		Spectral class	M5.5 (red)		Calc delta mag	2.5
Calc coord	yes