UU Aur

The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0

  5. Combined General Catalogue of Variable Stars (Vol. I-III)

catalogues and names UU Aur, HR 2405, HD 46687, SAO 59280, WDS 06365+3827

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

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 6h 36min 32,9sec DEC: +38 26' 43''
position (J1900) RA: 6h 29min 40,3sec DEC: +38 31' 34''
proper motion (J2000) RA: 0,005 arcsec/a DEC: -0,026 arcsec/a
radial velocity 12 km/s
trigonometric parallax 0,005 arcsec


visual magnitude 5,29
(V on UBV Johnson system)

spectral / color information

spectral class C5II
B-V-magnitude 2,61
R-I-magnitude 1,43
note (category: spectra): Infrared spectra show CO, CN and C2 molecules.

variability information

variable star identification UU Aur
note (category: variability): SRb 7.83 - 10.00B, 8.2 - 10.0p, 234d. Mean mag. varies in per. about 3500d.

double/multiple star system information

separation 17,9 arcsec
mag difference (of double or brightest multiple) 5,6
note Worley (1978) update of the IDS

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

position, motion, parallax:

position (J2000) RA: 6h 36min 32,828sec DEC: +38 26' 43,87'' 0,43 arcsec source: 16
proper motion (J2000) RA: -0,0002 arcsec/a DEC: -0,017 arcsec/a source: 25
radial velocity 12 km/s source: 25
trigonometric parallax 0,005 - source: 25
galactic coord. (B1950) longitude: 176,52 latitude: 13,78
GCI unit vector (J2000) X: -0,124366 Y: 0,773263 Z: 0,62177


visual 5,29 (observed) source: 25
photographic 9,1 source: 16

spectral information:

spectral class N0 source: 29
Morgan-Keenan C5,4 source: 25
B-magnitude 7,9 0,05 B-V-magnitude 2,61

variability information:

source of data: 30
variability type 194
var. amplitude 2,2
var. period 234

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 117,9 arcsec
position angle 222


16 PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
19 WDS Catalog
Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996
25 Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
29 SAOJ2000
SAO on FK5 at J2000, 1989
30 GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88

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

position and proper motion:

position (J1950) RA: 6h 33min 6,637sec DEC: +38 29' 16,1'' 0,023 arcsec
position (J2000) RA: 6h 36min 32,866sec DEC: +38 26' 43,08''
proper motion J1950 (FK4) RA: 0,0005 arcsec/a DEC: -0,028 arcsec/a 0,005 arcsec/a in RA
0,004 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0004 arcsec/a DEC: -0,026 arcsec/a
source of proper motion data Determined by source catalog


visual 5,1 (accuracy: 1 decimal)
source of visual magnitude data Source cited in source catalog introduction.

spectral information:

spectral class N0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Variable star in visual magnitude in source catalog


source catalogue GC, catalogue number: 8581
Durchmusterung BD+38 1539
Boss General Catalogue 8581
Henry Draper Catalogue 46687

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 6h 36,5min DEC: +38 27'
proper motion (J2000) RA: 0 arcsec/a DEC: -0,014 arcsec/a

double/multiple star system information:

component year number of measures position angle angular separation magnitude of 1st component magnitude of 2nd component spectral class(es) discoverer code
- 1878 2 222 118,6'' - 10,7 C5II BLL 17
1908 - 117,9''

discoverer information:

discoverer code discoverer reference
BLL 17 Ball, R.S. -


note A is the semiregular variable UU Aur.

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


position (J1950) RA: 6h 33min 6,6sec DEC: +38 29' 16''

variability informations:

variability type SRB pulsating variable star
magnitute at max. brightness 7,83
magnitute at min. brightness 10
photometric system
period [d] 234

spectral information

spectral class C5,3-C7,4(N3)


to a study Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph Vol. I GCVS (see Kholopov et al. 1985-1988)


ID in the GCVS catalogue 8/34
constellation Auriga
notes on existence The star is equivalent to '0080035 UV'.
There are notes in published catalog.

variability type description

variability type description
SRB Semiregular variables, which are giants or supergiants of intermediate and late spectral types showing noticeable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities. Periods lie in the range from 20 to >2000 days, while the shapes of the light curves are rather different and variable, and the amplitudes may be from several hundredths to several magnitudes (usually 1-2 mag in V).

Semiregular late-type (M, C, S or Me, Ce, Se) giants displaying persistent periodicity and usually small (<2.5 mag in V) light amplitudes (Z Aqr). Amplitudes and light-curve shapes generally vary and periods are in the range of 35-1200 days. Many of these stars differ from Miras only by showing smaller light amplitudes;

Semiregular late-type (M, C, S or Me, Ce, Se) giants with poorly defined periodicity (mean cycles in the range of 20 to 2300 days) or with alternating intervals of periodic and slow irregular changes, and even with light constancy intervals (RR CrB, AF Cyg). Every star of this type may usually be assigned a certain mean period (cycle), which is the value given in the Catalogue. In a number of cases, the simultaneous presence of two or more periods of light variation is observed;

Semiregular late-type (M, C, S or Me, Ce, Se) supergiants (Mu Cep) with amplitudes of about 1 mag and periods of light variation from 30 days to several thousand days;

Semiregular variable giants and supergiants of F, G, or K spectral types, sometimes with emission lines in their spectra. Amplitudes of light variation are in the range from 0.1 to 4 mag, and the range of periods is from 30 to 1100 days (SX Her, SV UMa).