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Current system

22241-0450
BU 172 AB,C
HD 212404

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

22241-0450 BU 172 AB,C (HD 212404)

22^h 24^m 06.87^s -04° 50' 13.2" P.A. 341.00 sep 53.9 mag 5.77,12.20 Sp A0V dist. 124.38 pc (405.73 l.y.)

Coord 2000	22241-0450		Discov num	BU 172		Comp	AB,C		Coord arcsec 2000	22 24 06.87 -04 50 13.2
Date first	1898		Date last	2016		Obs	14
Pa first	342		Pa last	341		P.A. Now (θ)	341°
Sep first	54.4		Sep last	53.9		Sep. Now (ρ)	53.9"
Mag pri	5.77		Mag sec	12.20		delta mag (ΔM)	6.43		Spectral class	A0V (white)
Pri motion ra	+026		Sec motion ra	+026
Pri motion dec	-008		Sec motion dec	-008
Notes	N V (See Notes, Proper motion indicates physical)

This double is physical.

22241-0450 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		146067	22 24 07 -04 50 13	BU 172 AB	2019	244	27	0.5	6.45	6.63	0.18	Y
Show	HD 212404	146067	22 24 07 -04 50 13	BU 172 AB,C	2016	14	341	53.9	5.77	12.20	6.43		<===
Show		146067	22 24 07 -04 50 13	BU 172 AB,D	2016	12	191	124.8	5.77	11.50	5.73
Show		146067	22 24 07 -04 50 13	BU 172 AB,E	2016	15	134	130.3	5.77	9.87	4.10
Show		146067	22 24 07 -04 50 13	STU 14 AB,F	2000	6	3	256.8	5.77	11.10	5.33

Sextuple system
7 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	HD 212404		Constellation	Aquarius		SAO	146067		HIP	110578
Tycho2	5229-01622-1		Gaia DR2	2626301656018708608		HD	212404		HR	8533
GC	31307		ADS	15902		BD	BD-05 5780		Distance	124.38
Distance ly	405.73