21086-2112 VIG 20 AF

Coord 2000	21086-2112		Discov num	VIG  20		Comp	AF		Coord arcsec 2000	21 08 33.62 -21 11 37.2
Date first	1998		Date last	2008		Obs	3
Pa first	14		Pa last	14.2		P.A. Now (θ)	14.2°
Sep first	9.7		Sep last	9.601		Sep. Now (ρ)	9.601"
Mag pri	5.30		Mag sec	13.00		delta mag (ΔM)	7.7		Spectral class	A0V (white)
Pri motion ra	+019		Sec motion ra
Pri motion dec	-060		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	Chi Cap	190050	21 08 34 -21 11 37	HJ 3009 AB	2020	6	61	70.6	5.28	11.72	6.44
Show		190050	21 08 34 -21 11 37	HJ 3009 AC	1999	3	114	35.8	5.28	15.00	9.72
Show		190050	21 08 34 -21 11 37	VIG 20 AE	2008	3	15	9.5	5.30	13.00	7.70
Show		190050	21 08 34 -21 11 37	VIG 20 AF	2008	3	14	9.6	5.30	13.00	7.70		<===
Show		190050	21 08 34 -21 11 37	VIG 20 AG	2007	1	62	13.1	5.30	20.00	14.70
Show			21 08 38 -21 11 03	HJ 3009 BD	2016	9	88	18.0	11.00	12.20	1.20

Septuple system
7 estimated visually detectable stars in this system

Constellation	Capricornus		SAO	190050		HIP	104365		Tycho2	6358-01841-1
Gaia DR2	6832245893565505024		HD	201184		HR	8087		GC	29543
GL	Wo 9720		BD	BD-21 5933		Bayer	Chi Capricorni		Bayer name	Chi Cap
Flamsteed	25 Capricorni		Flamsteed name	25 Cap		FK5	3690		Distance	55.13
Distance ly	179.83		Bayer greek	χ Cap

discov_num	notes	refcode
HJ 3009	chi Cap = 25 Cap
	HJ 1617.
VIG 20	The E and F components appear to be co-moving with the primary; the
	masses of E and F are estimated at 0.09-0.13 and 0.09-0.14 Msun,
	respectively. Optical/physical nature of the G component is undefined.	Vig2012

refcode	metd	author	reference
Vig2012	A -	Vigan, A., Patience, J., Marois, C., Bonavita, M., DeRosa, R.J., Macintosh, B.,	2012A&A...544A...9V
Vig2012		Song, I., Royon, R., Zuckerman, B., Lafreniere, D., & Barman, T.
Vig2012		A&A 544, A9, 2012
Vig2012		(measures include 5-sigma detection limits for separations 0.5" - 10")

idgroup	discov	author
1	HJ	Herschel, J.F.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21086-2112	VIG 20	AF	2008	2	14	9.6	5.30	13.00	A0V	N	210833.61-211136.7

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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