AO Canum Venaticorum
catalogues and names
| catalogues and names | AO CVn, 20 CVn, HR 5017, HD 115604, SAO 44549, BD +41 2380, FK5: 494 |
| constellation | Canes Venatici |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 13h 17min 32.5sec | DEC: +40° 34' 21'' | ||
| position (2000.73) | RA: 13h 17min 35sec | DEC: +40° 34' 7'' | ||
| position (B1900) | RA: 13h 13min 3.5sec | DEC: +41° 5' 57'' | ||
| proper motion (J2000) | RA: -0.125 arcsec/a | DEC: 0.021 arcsec/a | ||
| radial velocity | 8 km/s note: suspected variable radial velocity |
|||
| rotational velocity | 17 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.019 arcsec | |||
| galactic coordinates | longitude: 102.73° | latitude: 75.52° | ||
magnitude
| visual magnitude | 4.73 (V on UBV Johnson system) |
spectral / color information
| spectral class | F3III |
| B-V-magnitude | 0.3 |
| U-B-magnitude | 0.21 |
| R-I-magnitude |
| note (category: spectra): | MgII 4481 anomalously strong. |
variability information
| variable star identification | AO CVn |
| note (category: variability): | Delta Sct 4.70 - 4.75V, 0.12168d. Var. amp.? |
double/multiple star system information
| note (category: spectroscopic binaries): | Amp. 1.5k/s, 0.135d or 0.176d. |
miscellaneous information
| note (category: group membership): | Hyades group? |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 13h 17min 32.542sec | DEC: +40° 34' 21.45'' | ±0.06 arcsec | source: 15 |
| position (2000.73) | RA: 13h 17min 35sec | DEC: +40° 34' 7'' | JD: 2451810.88 | |
| proper motion (J2000) | RA: -0.011 arcsec/a | DEC: 0.021 arcsec/a | source: 25 | |
| radial velocity | 8 km/s | source: 25 | ||
| trigonometric parallax | 0.019 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 102.71° | latitude: 75.52° | ||
magnitude:
| visual | 4.73 (observed) | source: 25 |
| photovisual | 4.7 | source: 2 |
spectral information:
| spectral class | F0 | source: 96 | |
| Morgan-Keenan | F3III | source: 25 | |
| B-magnitude | 5.03 ±0.05 | B-V-magnitude | 0.3 |
| U-magnitude | 5.24 ±0.05 | U-B-magnitude | 0.21 |
variability information:
| variability type | 10 |
| var. amplitude | 0.05 |
| var. period | 0.12 |
| var. epoch | 2444382 22. May 1980, 12:00:00 UT |
| next max light | 2451810.96 23. September 2000, 11:02:24 UT |
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: 13h 15min 18.147sec | DEC: +40° 50' 7.24'' | ±0.004 arcsec |
| position (2000.73) | RA: 13h 17min 35sec | DEC: +40° 34' 6'' | JD: 2451810.88 |
| position (J2000) | RA: 13h 17min 32.554sec | DEC: +40° 34' 21.51'' | |
| proper motion B1950 (FK4) | RA: -0.0112 arcsec/a | DEC: 0.017 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0109 arcsec/a | DEC: 0.021 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.7 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | F0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 494 |
| Durchmusterung | BD+41 2380 |
| Boss General Catalogue | 18000 |
| Henry Draper Catalogue | 115604 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 13h 15min 18.1sec | DEC: +40° 50' 7'' |
variability informations:
| variability type | DSCTC | pulsating variable star |
| magnitute at max. brightness | 4.7 | |
| magnitute at min. brightness | 4.75 | |
| photometric system | visual, photovisual or Johnson's V | |
| epoch for maximum light [JD] | 2444381.6675 22. May 1980, 04:01:12 UT |
|
| period [d] | 0.12168 | |
| next maximum light [JD] | 2451810.96158 23. September 2000, 11:04:41 UT |
|
| rising time | 50 % of period |
spectral information
| spectral class | F3IIIp |
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 | 13/68 |
| constellation | Canes Venatici |
| notes on existence | The star is equivalent to '0130069 AP'. |
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. |