16555-0820 UC 3253 CF

16^h 55^m 25.20^s -08° 19' 21.6" P.A. 150.00 sep 298.8 mag 11.98,16.90 Sp M3.5V+M7V dist. 6.72 pc (21.92 l.y.)

Coord 2000	16555-0820	Discov num	UC 3253	Comp	CF	Coord arcsec 2000	16 55 25.20 -08 19 21.6
Date first	1999	Date last	2016	Obs	6
Pa first	150	Pa last	150	P.A. Now (θ)	150°
Sep first	299.0	Sep last	298.795	Sep. Now (ρ)	298.795"
Mag pri	11.98	Mag sec	16.90	delta mag (ΔM)	4.92	Spectral class	M3.5V+M7V (red/red)
Pri motion ra	-818	Sec motion ra	-813
Pri motion dec	-899	Sec motion dec	-871
Notes	N T (See Notes, Parallax indicates physical)

rPM=0.023 (< 0.3, Physical double)

This double is physical.

16555-0820 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		141439	16 55 29 -08 20 11	KUI 75 AB	2019	382	107	0.2	9.73	9.81	0.08	Y
Show	V1054 Oph	141439	16 55 29 -08 20 11	LDS 573 AB,C	2016	20	313	72.3	9.21	11.98	2.77
Show		141439	16 55 29 -08 20 11	LDS 573 AB,D	1960	1	155	21.0	9.21	17.70	8.49
Show		141439	16 55 29 -08 20 11	SLE 687 AB,E	2007	7	324	295.3	9.21	10.40	1.19
Show		141439	16 55 29 -08 20 11	WNO 55 AB,F	2005	10	155	230.7	9.02	16.90	7.88
Show			16 55 25 -08 19 22	UC 3253 CF	2016	6	150	298.8	11.98	16.90	4.92		<===

Sextuple system
7 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Ophiuchus		HIP	82809		GL	Gl 643		Distance	6.72
Distance ly	21.92

WDS 16555-0820 UC 3253 CF : NOTES

discov_num	notes	refcode
KUI 75	Wolf 630.
	A flare star, V1054 Oph. One of the shortest orbital period, for pairs
	resolved first by naked eye. The radial velocities indicate a third
	component. The intrinsically very faint star VB 8 (mag 17, 220") is
	also a member of the system. There is strong evidence that it is an
	astrometric binary. The pair is the large proper-motion star Wolf 630
	which forms a multiple system with the SB Wolf 629 (mag.11.7, 72",
	sdM4) and VBS 8 (mag. about 18, 221"), so the whole system is probably
	a septuple. There is strong evidence that VBS 8 is an astrometric
	binary. Eggen suggests that the group is part of a large moving	Egg1965b
	cluster. He has observed an UV flare on Wolf 630. According to
	Soderhjelm, the mass ratio and mass sum require the secondary to be a	Sod1999
	closer SB. Unuseable HIP solution.
	See Baize & Petit (1989) catalog of doubles with variable component.	Baz1989d
	Combined solution from astrometry, spectroscopy, and parallax.
	Solution yields mass and orbital parallax determination.	Sgr2000
	Martin et al. (1998) derive component masses 0.327 +/- 0.045 and
	0.558 +/- 0.047 Msun.	Mig1998
	KUI 75AB is also known as Gliese 644 (B is an SB1 star), component C
	is Gliese 643, also an SB1 star. Component F is VB 8 and is also known
	as Gliese 644C.	Och2010
	Also known as GJ 644, this is a well-known and much studied triple
	system (e.g. Segransan et al. 2000), of which we resolve the wider AB	Sgr2000
	pair (the secondary is a spectroscopic binary with a 3 day period). In
	addition, there are two much wider components known to share a common
	proper motion with GJ 644, making the system a likely quintuple. Since
	there are so many existing astrometric points of the AB pair in the
	literature, we do not give an extensive list in Table 4, but rather
	refer the reader to Segransan et al., where there is a full orbital
	analysis of the close triple system.	Jnn2012
LDS 573	AC: While VB 8 itself is single in the AstraLux sensitivity range, it
	is part of a higher-order multiple (at least triple, possibly
	quintuple) as a known 1500 au companion (C component) to GJ 644, which	Jnn2012
	was discussed in our Janson et al. (2012) study.	Jnn2014
WNO 55	AF: GJ 644 A+C. CPM pair.	Mkr2008
SLE 687	AB,E: Rectilinear solution by Mason & Hartkopf (2016).	Msn2016a

REFERENCES

refcode	metd	author	reference
Baz1989d	-	Baize, P. & Petit, M.	1989A&AS...77..497B
Baz1989d		A&AS 77, 497, 1989
Egg1965b	-	Eggen, O.J.	1965Obs....85..191E
Egg1965b		Observatory 85, 191, 1965
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
Jnn2014	A -	Janson, M., Bergfors, C., Brandner, W., Kudryavtseva, N., Hormuth, F.,	2014ApJ...789..102J
Jnn2014	+Cl	Hippler, S., & Henning, T.
Jnn2014		ApJ 789, 102, 2014
Mig1998	orb -	Martin, Ch., Mignard, F., Hartkopf, W.I., & McAlister, H.A.	1998A&AS..133..149M
Mig1998		A&AS 133, 149, 1998
Mkr2008	E -	Makarov, V.V., Zacharias, N., & Hennessy, G.S.	2008ApJ...687..566M
Mkr2008	+orb	ApJ 687, 566, 2008
Mkr2008		(new pairs WNO 50 - WNO 57)
Msn2016a	lin -	Mason, B.D. & Hartkopf, W.I.	2016IAUDS.189....1M
Msn2016a		Inf. Circ. 189, 1, 2016
Och2010	j	Ochsenbein, Francois	...................
Och2010		private communication, 2010
Sgr2000	A j	Segransan, D., Delfosse, X., Forveille, T., Beuzit, J.-L., Udry, S., Perrier, C.,	2000A&A...364..665S
Sgr2000	+orb	& Mayor, M.
Sgr2000		A&A 364, 665, 2000
Sod1999	orb -	Soderhjelm, S.	1999A&A...341..121S
Sod1999		A&A 341, 121, 1999

DISCOVERER

idgroup	discov	author
1	KUI	Kuiper, G.P., Schilt, van den Bos, W., and van Gent
63	LDS	Luyten p.m. catalog (from additional DD list)
63	SLE	Soulie, G.
82	UC	USNO CCD Astrographic Catalog (UCAC1, UCAC2, UCAC3, UCAC4)
82	UC	Zacharias, N., Finch, C.T., Girard, T.M., Henden, A., Bartlett, J.L., Monet, D.G.,
82	UC	& Zacharias, M.I. (UCAC4 Catalog)
93	UC	Zacharias, N., Finch, C.T., Subasavage, J.P., Bredthauer, G., Crockett, C.,
93	UC	DiVittorio, M., Ferguson, E., Harris, F., Harris, H.C., Hendon, A., Kilian, C.,
93	UC	Munn, J., Rafferty, T., Rhodes, A., Schultheis, M., Tilleman, T., & Wieder, G.
95	WNO	letters trailing each date on reference indicates different observers.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
16555-0820	UC 3253	CF	2000	2	150	299.5	11.40	16.50	M	V	165525.20-081921.6
16555-0820	UC 3253	CF	2010	3	150	298.9	11.40	16.50	M	NV	165525.20-081921.6
16555-0820	UC 3253	CF	2015	4	150	298.8	11.40	16.50	M	NV	165525.20-081921.6
16555-0820	UC 3253	CF	2016	6	150	298.8	11.40	16.50	M	NV	165525.20-081921.6

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WDS 16555-0820 UC 3253 CF : VISUAL OBSERVATIONS REPORTS

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WDS 16555-0820 UC 3253 CF : MEASURES

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WDS 16555-0820 : VIRTUAL EYEPIECE

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WDS 16555-0820 : ALADIN DSS IMAGE @

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

Error -22130
Not valid ID.

Error -22130
Not valid ID.
Error -27220
Not valid ID.