UU Aur
| 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)
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 | |
magnitude
| 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 | |
magnitude:
| 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:
| variability type | 194 |
| var. amplitude | 2,2 |
| var. period | 234 |
double/multiple star system information:
| separation between brightest and second brightest component | 117,9 arcsec |
| position angle | 222 ° |
sources:
| 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 | ||
magnitude:
| 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 |
catalogues
| 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. | - |
notes:
| note | A is the semiregular variable UU Aur. |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| 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) |
references
| 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) |
miscanellous
| 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). SRA 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; SRB 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; SRC 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; SRD 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). |