GG Lupi
catalogues and names
catalogues and names | GG Lup, HR 5687, HD 135876, SAO 225647, CD -40 9496 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
position (J2000) | RA: 15h 18min 56.4sec | DEC: -40° 47' 18'' | ||
position (2000.73) | RA: 15h 18min 59sec | DEC: -40° 47' 27'' | ||
position (B1900) | RA: 15h 12min 22.8sec | DEC: -40° 25' 18'' | ||
proper motion (J2000) | RA: -0.014 arcsec/a | DEC: -0.024 arcsec/a | ||
radial velocity | 11 km/s note: spectroscopic binaries, double lined spectra |
|||
rotational velocity | 150 km/s (uncertain) (variable) | |||
galactic coordinates | longitude: 330.85° | latitude: 13.95° |
magnitude
visual magnitude | 5.59 (V on UBV Johnson system) |
spectral / color information
spectral class | B7V |
B-V-magnitude | -0.1 |
U-B-magnitude | -0.46 |
variability information
variable star identification | GG Lup |
note (category: variability): | EB 5.49 - 6.0B, 2.164175d. Period 1.85 found for secondary min. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 15h 18min 56.391sec | DEC: -40° 47' 17.54'' | ±0.19 arcsec | source: 16 |
position (2000.73) | RA: 15h 18min 59sec | DEC: -40° 47' 27'' | JD: 2451810.11 | |
proper motion (J2000) | RA: -0.0011 arcsec/a | DEC: -0.019 arcsec/a | source: 25 | |
radial velocity | 11 km/s | source: 25 | ||
galactic coord. (B1950) | longitude: 330.85° | latitude: 13.95° |
magnitude:
visual | 5.59 (observed) | source: 25 |
photovisual | 5.8 | source: 16 |
spectral information:
spectral class | B8 | source: 96 | |
Morgan-Keenan | B7V | source: 25 | |
B-magnitude | 5.49 ±0.05 | B-V-magnitude | -0.1 |
U-magnitude | 5.03 ±0.05 | U-B-magnitude | -0.46 |
variability information:
variability type | 10 |
var. amplitude | 0.5 |
var. period | 2.16 |
var. epoch | 2434532 3. June 1953, 12:00:00 UT |
next max light | 2451812 24. September 2000, 12:00:00 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 | |
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: 15h 15min 39.108sec | DEC: -40° 36' 23.3'' | ±0.028 arcsec |
position (2000.73) | RA: 15h 18min 59sec | DEC: -40° 47' 26'' | JD: 2451810.11 |
position (J2000) | RA: 15h 18min 56.413sec | DEC: -40° 47' 17.88'' | |
proper motion B1950 (FK4) | RA: -0.0013 arcsec/a | DEC: -0.027 arcsec/a | ±0.007 arcsec/a in RA ±0.005 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: -0.0012 arcsec/a | DEC: -0.024 arcsec/a | |
source of proper motion data | Determined by source catalog |
magnitude:
visual | 5.8 (accuracy: 2 decimals) |
source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
spectral class | B8 |
source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
source catalogue | GC, catalogue number: 20566 |
Durchmusterung | CD-40 9496 |
Boss General Catalogue | 20566 |
Henry Draper Catalogue | 135876 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
position (equinox 1950.0) | RA: 15h 15min 39.1sec | DEC: -40° 36' 23'' |
variability informations:
variability type | EB/DM | close binary eclipsing system |
magnitute at max. brightness | 5.49 | |
magnitute at min. brightness | 6 | |
photometric system | ||
epoch for maximum light [JD] | 2434532.325 3. June 1953, 19:48:00 UT |
|
period [d] | 2.164175 | |
next maximum light [JD] | 2451811.0982 23. September 2000, 14:21:24 UT |
spectral information
spectral class | B7V |
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 | 50/190 |
constellation | Lupus |
notes on existence | The star is equivalent to '0500191 GH'. |
There are notes in published catalog. |
variability type description
variability type | description |
EB | Eclipsing binary systems. These are binary systems with orbital planes so close to the observer's line of sight (the inclination i of the orbital plane to the plane orthogonal to the line of sight is close to 90 deg) that the components periodically eclipse each other. Consequently, the observer finds changes of the apparent combined brightness of the system with the period coincident with that of the components' orbital motion. EA Algol (Beta Persei)-type eclipsing systems. Binaries with spherical or slightly ellipsoidal components. It is possible to specify, for their light curves, the moments of the beginning and end of the eclipses. Between eclipses the light remains almost constant or varies insignificantly because of reflection effects, slight ellipsoidality of components, or physical variations. Secondary minima may be absent. An extremely wide range of periods is observed, from 0.2 to >= 10000 days. Light amplitudes are also quite different and may reach several magnitudes. EB Beta Lyrae-type eclipsing systems. These are eclipsing systems having ellipsoidal components and light curves for which it is impossible to specify the exact times of onset and end of eclipses because of a continuous change of a system's apparent combined brightness between eclipses; secondary minimum is observed in all cases, its depth usually being considerably smaller than that of the primary minimum; periods are mainly longer than 1 day. The components generally belong to early spectral types (B-A). Light amplitudes are usually <2 mag in V. EW W Ursae Majoris-type eclipsing variables. These are eclipsers with periods shorter than 1 days, consisting of ellipsoidal components almost in contact and having light curves for which it is impossible to specify the exact times of onset and end of eclipses. The depths of the primary and secondary minima are almost equal or differ insignificantly. Light amplitudes are usually <0.8 mag in V. The components generally belong to spectral types F-G and later. |
DM | Detached main-sequence systems. Both components are main-sequence stars and do not fill their inner Roche lobes. |