FM Aquarii

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)

position, motion, parallax:

position (J2000)	RA: 22h 48min 30.2sec	DEC: -10° 33' 20''
position (B1900)	RA: 22h 43min 14.5sec	DEC: -11° 5' 1''
proper motion (J2000)	RA: 0.035 arcsec/a	DEC: 0.007 arcsec/a
radial velocity	-6 km/s
galactic coordinates	longitude: 56.8°	latitude: -56.68°

magnitude

visual magnitude

6.19
(V on UBV Johnson system)

spectral / color information

spectral class	A9III-IV
B-V-magnitude	0.28

variability information

variable star identification

FM Aqr

note (category: variability):

Delta Sct 6.16 - 6.19V, 0.087d.

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000)	RA: 22h 48min 30.221sec	DEC: -10° 33' 19.8''	±0.22 arcsec	source: 15
proper motion (J2000)	RA: 0.0024 arcsec/a	DEC: 0.007 arcsec/a		source: 25
radial velocity	-6 km/s			source: 25
galactic coord. (B1950)	longitude: 56.81°	latitude: -56.68°

magnitude:

visual	6.19 (observed)	source: 25
photovisual	6.2	source: 2
photographic	6.4	source: 2

spectral information:

spectral class	F0		source: 96
Morgan-Keenan	A9III-IV		source: 25
B-magnitude	6.47 ±0.05	B-V-magnitude	0.28

variability information:

source of data: 30

variability type	10
var. amplitude	0.03
var. period	0.09

sources:

2	HD and HDE Catalogs
Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University
15	FK5, FK5 Extension and FK5 Supplement
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991
25	Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
96	SAO or HD/HDE Catalog
Reference from Value 1 or Reference from Value 2

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (B1950)	RA: 22h 45min 52.389sec	DEC: -10° 49' 12.64''	±0.014 arcsec
position (J2000)	RA: 22h 48min 30.224sec	DEC: -10° 33' 20.37''
proper motion B1950 (FK4)	RA: 0.0022 arcsec/a	DEC: 0.005 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0024 arcsec/a	DEC: 0.002 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	6.1 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	F0
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 31822
Durchmusterung	BD-11 5923
Boss General Catalogue	31822
Henry Draper Catalogue	215874

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 22h 45min 52.4sec

DEC: -10° 49' 13''

variability informations:

variability type	DSCTC	pulsating variable star
magnitute at max. brightness	6.16
magnitute at min. brightness	6.19
photometric system	visual, photovisual or Johnson's V
period [d]	0.087

spectral information

spectral class

A9III-IV

references

to a study	Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	4/176
constellation	Aquarius
notes on existence	The star is equivalent to '0040177 FN'.

variability type description

variability type

description

DSCTC

Variables of the Delta Scuti type. These are pulsating variables of spectral types A0-F5 III-V displaying light amplitudes from 0.003 to 0.9 mag in V (usually several hundredths of a magnitude) and periods from 0.01 to 0.2 days. The shapes of the light curves, periods, and amplitudes usually vary greatly. Radial as well as nonradial pulsations are observed. The variability of some
members of this type appears sporadically and sometimes completely ceases, this being a consequence of strong amplitude modulation with the lower value of the amplitude not exceeding 0.001 mag in some cases. The maximum of the surface layer expansion does not lag behind the maximum light for more than 0.1 periods. DSCT stars are representatives of the galactic disk (flat component) and are phenomenologically close to the SX Phe variables.

DSCTC
Low amplitude group of Delta Sct variables (light amplitude <0.1 mag in V). The majority of this type's representatives are stars of luminosity class V; objects of this subtype generally are representative of the Delta Sct variables in open clusters.

catalogues and names	FM Aqr, 70 Aqr, HR 8676, HD 215874, SAO 165308, BD -11 5923, FK5: 3825
constellation	Aquarius