FW Lupi
catalogues and names |
SKY2000 - Master Star Catalog |
Smithsonian Astrophysical Observatory Star Catalog |
Combined General Catalogue of Variable Stars (Vol. I-III) |
catalogues and names
catalogues and names | FW Lup, HD 136483, SAO 225707, CP -40 6941 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 15h 22min 25.414sec | DEC: -40° 55' 36.24'' | ±0.2 arcsec | source: 16 |
position (2000.73) | RA: 15h 22min 28sec | DEC: -40° 55' 45'' | JD: 2451810.88 | |
proper motion (J2000) | RA: 0.0004 arcsec/a | DEC: -0.014 arcsec/a | source: 16 | |
galactic coord. (B1950) | longitude: 331.34° | latitude: 13.47° |
magnitude:
visual | 8.82 (observed) | source: 30 |
photovisual | 9.2 | source: 16 |
spectral information:
spectral class | G0 | source: 96 | |
Morgan-Keenan | F5IV | source: 10 |
variability information:
variability type | 120 |
var. amplitude | 0.4 |
var. period | 0.48 |
var. epoch | 2442171 3. May 1974, 12:00:00 UT |
next max light | 2451811.32 23. September 2000, 19:40:48 UT |
sources:
10 | Michigan Catalog of 2-Dimensional Spectral Types for the HD Stars, Volumes I-III |
Houk, N., and A.P. Cowley, Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 1., (Zones -89 to -53 Degrees), Ann Arbor: The University of Michigan, 1975, and Houk, N., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 2., (Zones -52 to -40 Degrees), Ann Arbor: The University of Michigan, 1978, and Houk, N., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 3., (Zones -40 to -26 Degrees), Ann Arbor: The University of Michigan, 1982 | |
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 | |
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: 15h 19min 7.181sec | DEC: -40° 44' 53.28'' | ±0.086 arcsec |
position (2000.73) | RA: 15h 22min 28sec | DEC: -40° 55' 44'' | JD: 2451810.88 |
position (J2000) | RA: 15h 22min 25.298sec | DEC: -40° 55' 35.56'' | |
proper motion B1950 (FK4) | RA: -0.0007 arcsec/a | DEC: -0.013 arcsec/a | ±0.012 arcsec/a in RA ±0.012 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: -0.0006 arcsec/a | DEC: -0.01 arcsec/a | |
source of proper motion data | Determined by source catalog |
magnitude:
visual | 9 (accuracy: 1 decimal) |
source of visual magnitude data | Taken from CGA (Perrine 1911a, b) or Cordoba Zones. |
photographic | 9.5 (accuracy: 1 decimal) |
source of photographic magnitude data | Taken from magnitudes of the CPD and diameters of the Cape Astrographic Catalogue |
spectral information:
spectral class | G0 |
source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
source catalogue | Cape Zone, catalogue number: 13260 |
Durchmusterung | CP-40 6941 |
Henry Draper Catalogue | 136483 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
position (equinox 1950.0) | RA: 15h 19min 7.2sec | DEC: -40° 44' 53'' |
variability informations:
variability type | RR | pulsating variable star |
magnitute at max. brightness | 8.82 | |
magnitute at min. brightness | 9.22 | |
photometric system | visual, photovisual or Johnson's V | |
epoch for maximum light [JD] | 2442171.377 3. May 1974, 21:02:53 UT |
|
period [d] | 0.4841712 | |
next maximum light [JD] | 2451811.225592 23. September 2000, 17:24:51 UT |
|
rising time | 23 % of period |
spectral information
spectral class | F5IV |
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 'Cordoba Durchmusterung' |
miscanellous
ID in the GCVS catalogue | 50/186 |
constellation | Lupus |
notes on existence | The star is equivalent to '0500187 FX'. |
variability type description
variability type | description |
RR | Variables of the RR Lyrae type, which are radially-pulsating giant A-F stars having amplitudes from 0.2 to 2 mag in V. Cases of variable light-curve shapes as well as variable periods are known. If these changes are periodic, they are called the "Blazhko effect." Traditionally, RR Lyrae stars are sometimes called short-period Cepheids or cluster-type variables. The majority of these stars belong to the spherical component of the Galaxy; they are present, sometimes in large numbers, in some globular clusters, where they are known as pulsating horizontal-branch stars. Like Cepheids, maximum expansion velocities of surface layers for these stars practically coincide with maximum light. RR(B) RR Lyrae variables showing two simultaneously operating pulsation modes, the fundamental tone with the period P0 and the first overtone, P1 (AQ Leo). The ratio P1/P0 is approximately 0.745; RRAB RR Lyrae variables with asymmetric light curves (steep ascending branches), periods from 0.3 to 1.2 days, and amplitudes from 0.5 to 2 mag in V; RRC RR Lyrae variables with nearly symmetric, sometimes sinusoidal, light curves, periods from 0.2 to 0.5 days, and amplitudes not greater than 0.8 mag in V (SX UMa). |