R Lep
| catalogues and names | R Lep, HR 1607, HD 31996, SAO 150058 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 4h 59min 36,5sec | DEC: -14° 48' 21'' |
| position (J1900) | RA: 4h 55min 3,2sec | DEC: -14° 57' 24'' |
| proper motion (J2000) | RA: 0,021 arcsec/a | DEC: 0,02 arcsec/a |
| radial velocity | 32 km/s note: variable radial velocity |
|
magnitude
| visual magnitude | 7,71 (V on UBV Johnson system) |
spectral / color information
| spectral class | C6IIe |
| B-V-magnitude | 5,74 |
| R-I-magnitude | 1,47 |
variability information
| variable star identification | R Lep |
| note (category: variability): | M 5.5 - 11.7v. Period has varied between 418 and 441d: since JD 2436000, 427.07d; max. mag. varies in period possibly over 40y. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 4h 59min 36,315sec | DEC: -14° 48' 22,13'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0,0002 arcsec/a | DEC: 0,006 arcsec/a | source: 25 | |
| radial velocity | 32 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 214,33° | latitude: -31,33° | ||
| GCI unit vector (J2000) | X: 0,251833 | Y: 0,933421 | Z: -0,255549 | |
magnitude:
| visual | 8,08 (observed) | source: 20 |
| photovisual | 7,3 | source: 16 |
spectral information:
| spectral class | N8 | source: 29 | |
| Morgan-Keenan | C7,4e | source: 25 | |
| B-magnitude | 13,78 ±0,449 | B-V-magnitude | 5,7 |
| U-magnitude | 15,18 | U-B-magnitude | 1,4 |
variability information:
| variability type | 180 |
| var. amplitude | 6,2 |
| var. period | 427,07 |
| var. epoch | 2442506 3. April 1975, 12:00:00 UT |
| next max light | 2451901,54 23. December 2000, 00:57:36 UT |
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 | |
| 20 | Catalogue of Homogeneous Means in the UBV System |
| Mermilliod, J.C., Catalogue of Homogeneous Means in the UBV System, Institut d'Astronomie, Universite de Lausanne, 1994 | |
| 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: 4h 57min 19,727sec | DEC: -14° 52' 47,48'' | ±0,046 arcsec |
| position (J2000) | RA: 4h 59min 36,473sec | DEC: -14° 48' 20,49'' | |
| proper motion J1950 (FK4) | RA: 0,001 arcsec/a | DEC: 0,02 arcsec/a | ±0,008 arcsec/a in RA ±0,009 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0015 arcsec/a | DEC: 0,02 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6 (accuracy: 1 decimal) |
| source of visual magnitude data | Source cited in source catalog introduction. |
spectral information:
| spectral class | N8 |
| 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: 6093 |
| Durchmusterung | BD-15 915 |
| Boss General Catalogue | 6093 |
| Henry Draper Catalogue | 31996 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (J1950) | RA: 4h 57min 19,7sec | DEC: -14° 52' 47'' |
variability informations:
| variability type | M | pulsating variable star |
| magnitute at max. brightness | 5,5 | |
| magnitute at min. brightness | 11,7 | |
| photometric system | visual, photovisual or Johnson's V | |
| epoch for maximum light [JD] | 2442506 3. April 1975, 12:00:00 UT |
|
| period [d] | 427,07 | |
| next maximum light [JD] | 2451901,54 23. December 2000, 00:57:36 UT |
|
| rising time | 55 % of period |
spectral information
| spectral class | C7,6e(N6e) |
references
| to a study | the main characteristics of the star was determined by the authors themselves |
| to a chart/photograph | Vol. I GCVS (see Kholopov et al. 1985-1988) |
miscanellous
| ID in the GCVS catalogue | 48/1 |
| constellation | Lepus |
| notes on existence | The star is equivalent to '0480002 S'. |
| There are notes in published catalog. | |
variability type description
| variability type | description |
| M | Mira (Omicron) Ceti-type variables. These are long-period variable giants with characteristic late-type emission spectra (Me, Ce, Se) and light amplitudes from 2.5 to 11 mag in V. Their periodicity is well pronounced, and the periods lie in the range between 80 and 1000 days. Infrared amplitudes are usually less than in the visible and may be <2.5 mag. For example, in the K band they usually do not exceed 0.9 mag. If the amplitudes exceed 1 - 1.5 mag , but it is not certain that the true light amplitude exceeds 2.5 mag, the symbol "M" is followed by a colon, or the star is attributed to the semiregular class with a colon following the symbol for that type (SR). |