V0388 Cephei
catalogues and names
| catalogues and names | V0388 Cep, HR 8851, HD 219586, SAO 10671, BD +70 1311, FK5: 3862 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 15min 37.8sec | DEC: +70° 53' 17'' | ||
| position (B1900) | RA: 23h 11min 46.2sec | DEC: +70° 20' 34'' | ||
| proper motion (J2000) | RA: 0.018 arcsec/a | DEC: -0.005 arcsec/a | ||
| radial velocity | 12 km/s note: spectroscopic binaries |
|||
| rotational velocity | 140 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 115.19° | latitude: 9.47° | ||
magnitude
| visual magnitude | 5.56 (V on UBV Johnson system) |
spectral / color information
| spectral class | F0IV |
| B-V-magnitude | 0.24 |
| U-B-magnitude | 0.12 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 15min 37.817sec | DEC: +70° 53' 17.19'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0041 arcsec/a | DEC: -0.002 arcsec/a | source: 25 | |
| radial velocity | 12 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 115.19° | latitude: 9.47° | ||
magnitude:
| visual | 5.56 (observed) | source: 25 |
| photovisual | 5.6 | source: 2 |
| photographic | 5.7 | source: 16 |
spectral information:
| spectral class | A3 | source: 96 | |
| Morgan-Keenan | F0IV | source: 25 | |
| B-magnitude | 5.8 ±0.05 | B-V-magnitude | 0.24 |
| U-magnitude | 5.92 ±0.05 | U-B-magnitude | 0.12 |
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 | |
| 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 | |
| 25 | Bright Star Catalogue, 5th edition |
| Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994 | |
| 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: 23h 13min 41.395sec | DEC: +70° 36' 55.09'' | ±0.026 arcsec |
| position (J2000) | RA: 23h 15min 37.749sec | DEC: +70° 53' 17.59'' | |
| proper motion B1950 (FK4) | RA: 0.0033 arcsec/a | DEC: 0.01 arcsec/a | ±0.005 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0035 arcsec/a | DEC: 0.003 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A3 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 32388 |
| Durchmusterung | BD+70 1311 |
| Boss General Catalogue | 32388 |
| Henry Draper Catalogue | 219586 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 23h 13min 41.4sec | DEC: +70° 36' 55'' |
variability informations:
| variability type | DSCT: | pulsating variable star |
| magnitute at max. brightness | 5.56 | |
| magnitute amplitude | 0.07 | |
| photometric system | visual, photovisual or Johnson's V |
references
| to a study | Hao Jinxin, Huang Lin, IBVS No.3832, 1993. |
| to a chart/photograph | no chart is avaible, but the star is contained in the 'Bonner Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 20/388 |
| constellation | Cepheus |
| notes on existence | The star is equivalent to '72486'. |
variability type description
| variability type | description |
| DSCT | 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. |