UU Arietis

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

position, motion, parallax:

position (J2000)	RA: 2h 30min 38.4sec	DEC: +19° 51' 19''
position (B1900)	RA: 2h 25min 1.8sec	DEC: +19° 24' 41''
proper motion (J2000)	RA: 0.078 arcsec/a	DEC: -0.033 arcsec/a
radial velocity	19 km/s note: variable radial velocity
rotational velocity	152 km/s (uncertain) (variable)
galactic coordinates	longitude: 152.63°	latitude: -37.23°

magnitude

visual magnitude

6.15
(V on UBV Johnson system)

spectral / color information

spectral class	A9V
B-V-magnitude	0.25
U-B-magnitude	0.1

note (category: spectra):

Also classified A9III.

variability information

variable star identification

UU Ari

note (category: variability):

Delta Sct 6.11 - 6.15V, 0.080d.

double/multiple star system information

note (category: double and multiple data):

Suspected occultation double.

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

position, motion, parallax:

position (J2000)	RA: 2h 30min 38.408sec	DEC: +19° 51' 19.19''	±0.22 arcsec	source: 15
proper motion (J2000)	RA: 0.0056 arcsec/a	DEC: -0.033 arcsec/a		source: 25
radial velocity	19 km/s			source: 25
galactic coord. (B1950)	longitude: 152.64°	latitude: -37.23°

magnitude:

visual	6.15 (observed)	source: 25
photovisual	6.1	source: 2

spectral information:

spectral class	F0		source: 96
Morgan-Keenan	A9V		source: 25
B-magnitude	6.4 ±0.05	B-V-magnitude	0.25
U-magnitude	6.5 ±0.05	U-B-magnitude	0.1

variability information:

source of data: 30

variability type	10
var. amplitude	0.05
var. period	0.08

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: 2h 27min 49.855sec	DEC: +19° 38' 3.63''	±0.015 arcsec
position (J2000)	RA: 2h 30min 38.43sec	DEC: +19° 51' 18.9''
proper motion B1950 (FK4)	RA: 0.0058 arcsec/a	DEC: -0.033 arcsec/a	±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0058 arcsec/a	DEC: -0.036 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: 3003
Durchmusterung	BD+19 365
Boss General Catalogue	3003
Henry Draper Catalogue	15550

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

position:

position (equinox 1950.0)

RA: 2h 27min 49.9sec

DEC: +19° 38' 4''

variability informations:

variability type	DSCTC	pulsating variable star
magnitute at max. brightness	6.1
magnitute at min. brightness	6.15
photometric system	visual, photovisual or Johnson's V
period [d]	0.08

spectral information

spectral class

A9III

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	7/34
constellation	Aries
notes on existence	The star is equivalent to '0070035 UV'.

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	UU Ari, 26 Ari, HR 729, HD 15550, SAO 92979, BD +19 365, FK5: 2172
constellation	Aries