22577-2937 SHY 106 AB (Fomalhaut)

22^h 57^m 39.04^s -29° 37' 20.0" P.A. 188.00 sep 999.9 mag 1.25,6.60 Sp A3V+K4V dist. 7.7 pc (25.12 l.y.)

Coord 2000	22577-2937	Discov num	SHY 106	Comp	AB	Coord arcsec 2000	22 57 39.04 -29 37 20.0
Date first	1991	Date last	1998	Obs	3
Pa first	188	Pa last	187.9	P.A. Now (θ)	187.9°
Sep first	999.9	Sep last	7059.84	Sep. Now (ρ)	7059.84"
Mag pri	1.25	Mag sec	6.60	delta mag (ΔM)	5.35	Spectral class	A3V+K4V (white/yellow-orange)
Pri motion ra	+329	Sec motion ra	+334
Pri motion dec	-164	Sec motion dec	-157
Notes	N V (See Notes, Proper motion indicates physical)

rPM=0.023 (< 0.3, Physical double)

This double is physical.

22577-2937 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		191524	22 57 39 -29 37 20	KAL 1 Aa,Ab	2006	2	251	12.7	1.16	24.60	23.44
Show	Fomalhaut	191524	22 57 39 -29 37 20	SHY 106 AB	1998	3	188	999.9	1.25	6.60	5.35		<===
Show		191524	22 57 39 -29 37 20	MAM 1 AC	2000	2	338	999.9	1.25	12.62	11.37

Quadruple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Common name	Fomalhaut	Var name	NSV14372 PsA	Constellation	Piscis Austrinus	SAO	191524
HIP	113368	Tycho2	6977-01267-1	HD	216956	HR	8728
GC	32000	GL	Gl 881	CD	CD-3019370	CP	CP-30 6685
Bayer	Alpha Piscis Austrini	Bayer name	Alp PsA	Flamsteed	24 Piscis Austrini	Flamsteed name	24 PsA
FK5	867	Distance	7.7	Distance ly	25.12	Bayer greek	α PsA

Meaning

The name is originally from Arabic: ?? ????? fum al-?awt ('mouth of the fish'). In Persian astrology, this star was called "Haftorang, Watcher of the South", one of the royal stars.