q Indi
| catalogues and names | q Ind, HR 8140, HD 202730, SAO 246965, WDS 21199-5327B |
| constellation | Indus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 21h 19min 52sec | DEC: -53° 26' 59'' |
| position (J1900) | RA: 21h 12min 44,4sec | DEC: -53° 52' 6'' |
| proper motion (J2000) | RA: 0,105 arcsec/a | DEC: -0,072 arcsec/a |
| radial velocity | -15 km/s | |
| rotational velocity | 178 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,043 arcsec | |
| note (category: dynamical parallaxes): | 0.048". |
magnitude
| visual magnitude | 4,39 (V on UBV Johnson system) |
spectral / color information
| spectral class | A5V |
| B-V-magnitude | 0,19 |
| U-B-magnitude | 0,12 |
double/multiple star system information
| separation | 6,1 arcsec |
| mag difference (of double or brightest multiple) | 2,4 |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | Companion A7V or G0V. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 21h 19min 51,3sec | DEC: -53° 26' 56,6'' | ±0,36 arcsec | source: 18 |
| proper motion (J2000) | RA: 0,0111 arcsec/a | DEC: -0,063 arcsec/a | source: 18 | |
| radial velocity | -7,2 km/s | source: 11 | ||
| trigonometric parallax | 0,035 | ±0,01 arcsec | source: 6 | |
| galactic coord. (B1950) | longitude: 343,69° | latitude: -43,32° | ||
| GCI unit vector (J2000) | X: 0,455966 | Y: -0,383092 | Z: -0,803328 | |
magnitude:
| visual | 7 (derived) | |
| photovisual | 7 | source: 19 |
spectral information:
double/multiple star system information:
| separation between brightest and second brightest component | 6,5 arcsec |
| magnitude difference between brightest and second brightest component | 2,5 |
| position angle | 272 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,386 | A5 | q Indi, HR 8140, HD 202730, SAO 246965 |
| B | 7 | - |
sources:
| 6 | General Catalog of Trigonometric Stellar Parallaxes |
| Stellar Parallaxes, New Haven: Yale University Observatory, 1952; and Supplement, 1963 | |
| 11 | General Catalogue of Stellar Radial Velocities |
| Wilson, R.E., General Catalogue of Stellar of Stellar Radial Radial Velocities, Washington, DC: Carnegie Institute of Washington, 1953 | |
| 18 | Hipparcos Input Catalog Version 2 Annex |
| Turon, C., et al., "The Hipparcos Input Catalog, Version 2," Centre de Donnees Stellaires Information Bulletin, Vol. 43, p. 5, 1993 | |
| 19 | WDS Catalog |
| Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996 | |
data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)
position and proper motion:
| position (J1950) | RA: 21h 16min 18,874sec | DEC: -53° 39' 37,51'' | ±0,045 arcsec |
| position (J2000) | RA: 21h 19min 51,983sec | DEC: -53° 26' 58,51'' | |
| proper motion J1950 (FK4) | RA: 0,0121 arcsec/a | DEC: -0,068 arcsec/a | ±0,008 arcsec/a in RA ±0,007 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0117 arcsec/a | DEC: -0,072 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4,6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 29819 |
| Durchmusterung | CP-5310037A |
| Boss General Catalogue | 29819 |
| Henry Draper Catalogue | 202730 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 21h 19,9min | DEC: -53° 27' |
| proper motion (J2000) | RA: 0,144 arcsec/a | DEC: -0,073 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 |
| - | 1834 | 60 | 305° | 3,5'' | 4,5 | 7 | A5V | HJ 5258 |
| 1982 | 272° | 6,5'' |
discoverer information:
| discoverer code | discoverer | reference |
| HJ 5258 | Herschel, J. | - |
notes:
| note | Theta Ind. |