Porrima
| catalogues and names | Porrima, g Vir, NSV 05859, 29 Vir, HR 4825, HD 110379, SAO 138917, WDS 12417-0127A |
| other names | Arich in Becvar |
| constellation | Virgo |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Porrima; Arich in Becvar. |
position, motion, parallax:
| position (J2000) | RA: 12h 41min 39,6sec | DEC: -1° 26' 58'' |
| position (J1900) | RA: 12h 36min 35,5sec | DEC: -0° 54' 3'' |
| proper motion (J2000) | RA: -0,565 arcsec/a | DEC: 0,012 arcsec/a |
| radial velocity | -20 km/s note: spectroscopic binaries |
|
| rotational velocity | 28 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,099 arcsec | |
| note (category: dynamical parallaxes): | 0.084". |
magnitude
| visual magnitude | 3,65 (original HR magnitude) |
spectral / color information
| spectral class | F0V |
| B-V-magnitude | 0,36 |
| U-B-magnitude | -0,03 |
| R-I-magnitude | 0,19 |
variability information
| variable star identification | 5859 |
| note (category: variability): | Amp. 0.02V. Blend with 4826. Uncertain which component is the variable suspect. |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 4,1 arcsec |
| mag difference (of double or brightest multiple) | 0,1 |
| component ID | AB |
| note (category: double and multiple data): | AB 3.48 F0V, 3.50 F0V, 171.37y, a = 3.746". Speckle interferometric sep. 3.674", 1982.38. Combined mag. 2.75V. Colors for combined light. Component C, 15v at 53", optical. |
miscellaneous information
| note (category: stellar radii or diameters): | Radius 1.5 solar. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 12h 41min 39,595sec | DEC: -1° 26' 57,88'' | ±0,19 arcsec | source: 33 |
| proper motion (J2000) | RA: -0,0377 arcsec/a | DEC: 0,012 arcsec/a | source: 25 | |
| radial velocity | -20 km/s | source: 25 | ||
| trigonometric parallax | 0,099 | ±0,01 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 297,87° | latitude: 61,33° | ||
| GCI unit vector (J2000) | X: -0,98321 | Y: -0,180718 | Z: -0,025294 | |
magnitude:
| visual | 3,48 (observed) | source: 25 |
| photovisual | 3,7 | source: 2 |
| photographic | 3,9 | source: 2 |
spectral information:
| spectral class | F0 | source: 96 | |
| Morgan-Keenan | F0V | source: 25 | |
| B-magnitude | 3,84 ±0,05 | B-V-magnitude | 0,36 |
| U-magnitude | 3,81 ±0,05 | U-B-magnitude | -0,03 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 0,1 |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 3,48 | F0 | Porrima, g Virginis, 29 Vir, HR 4825, HD 110379, SAO 138917 |
| B | 3,5 | F0 | g Virginis, 29 Vir, HR 4826, HD 110380, SAO 138917 |
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 | |
| 19 | WDS Catalog |
| Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996 | |
| 25 | Bright Star Catalogue, 5th edition |
| Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994 | |
| 33 | Hipparcos Main Input Catalogue Version 2 |
| Turon, C., et al., The Hipparcos Input Catalogue, Version 2, CDS Bull. No. 43, p.5, 1993 | |
| 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 (J1950) | RA: 12h 39min 7,452sec | DEC: -1° 10' 31,58'' | ±0,009 arcsec |
| position (J2000) | RA: 12h 41min 39,598sec | DEC: -1° 26' 57,71'' | |
| proper motion J1950 (FK4) | RA: -0,0379 arcsec/a | DEC: 0,008 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0377 arcsec/a | DEC: 0,012 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 2,9 (accuracy: 2 decimals) |
| source of visual magnitude data | Combined magnitude of component stars. |
spectral information:
| spectral class | F0 |
| source of spectral data | Taken from the HD with M stars reclassified by Miss Cannon. |
remarks for duplicity and variability
| Double star - see source catalog for source |
catalogues
| source catalogue | FK3, catalogue number: 477 |
| Durchmusterung | BD-00 2601 |
| Boss General Catalogue | 17270 |
| Henry Draper Catalogue | 110379 The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given. |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 12h 41,7min | DEC: -1° 27' |
| proper motion (J2000) | RA: -0,567 arcsec/a | DEC: 0,008 arcsec/a |
double/multiple star system information:
| component | year | number of measures | position angle | angular separation | magnitude of 1st component | magnitude of 2nd component | spectral class(es) | discoverer code |
| AB | 1822 | often | ° | '' | 3,4 | 3,5 | F0V F0V | STF1670 |
| AC | 1889 | 1 | 159° | 53,1'' | 3,6 | 15,1 | - | STF1670 |
| AD | 1912 | 3 | 88° | 123,6'' | 3,6 | 12,2 | - | STF1670 |
| 1923 | - | 125,9'' | ||||||
| AE | 1851 | 6 | 186° | 255'' | - | - | - | STF1670 |
| 1909 | 180° | 251,8'' | ||||||
| AF | 1909 | 2 | 269° | 482,1'' | - | - | - | STF1670 |
| BD | 1880 | 1 | 88° | 102,8'' | 3,7 | 12,3 | - | STF1670 |
discoverer information:
| discoverer code | discoverer | reference |
| STF1670 | Struve, F.G.W. | - |
notes:
| note | Gamma Vir. P = 169yr., a = 3.70", motion retrograde. One component is a suspected variable. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (J1900) | RA: 12h 36,6min | DEC: -0° 54' |
magnitudes, spectral classes, orbital elements:
| author: | K.A. Strand |
| date of observation: | 1935 |
| magnitude of component A: | 3,48 |
| magnitude of component B: | 3,48 |
| spectral class component B: | F0V |
| spectral class component B: | F0V |
| period [y]: | 171,37 |
| semi-major axis [arcsec]: | 3,746 |
| inclination [deg]: | 146,05 |
| node [deg]: | 31,78 |
| equinox of node: | 1900 |
| eccentricity: | 0,881 |
| time of periastron passage: | 1836,433 |
| dates of ephemeris: | 1935-1956 |
| grade: | good |
| reference: | Ann. Sterrew. Leiden 18, 77; 1937. |
| other name(s) | STF 1670, Gamma Vir |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 12h 39min 7,5sec | DEC: -1° 10' 32'' |
variability informations:
| magnitute at max. brightness | 2,72 |
| magnitute at min. brightness | 2,78 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | F0 |
references
| to a study | 0132D (designation: 1670) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |