l Octantis
| catalogues and names | l Oct, HR 8280, HD 206240, SAO 258914, WDS 21509-8243A |
| constellation | Octans |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 21h 50min 54,3sec | DEC: -82° 43' 9'' |
| position (J1900) | RA: 21h 35min 36,4sec | DEC: -83° 10' 44'' |
| proper motion (J2000) | RA: 0,058 arcsec/a | DEC: -0,036 arcsec/a |
| radial velocity | -11 km/s | |
| dynamical parallax | 0,011 arcsec | |
magnitude
| visual magnitude | 5,29 (V on UBV Johnson system) |
spectral / color information
| spectral class | G8-K0III |
| B-V-magnitude | 0,75 |
| U-B-magnitude | 0,47 |
double/multiple star system information
| separation | 2,8 arcsec |
| mag difference (of double or brightest multiple) | 2,3 |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | Binary. Companion A3. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 21h 50min 54,63sec | DEC: -82° 43' 7,94'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0,0285 arcsec/a | DEC: -0,037 arcsec/a | source: 25 | |
| radial velocity | -11 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 309,02° | latitude: -32,13° | ||
| GCI unit vector (J2000) | X: 0,107159 | Y: -0,067671 | Z: -0,991936 | |
magnitude:
| visual | 5,29 (observed) | source: 25 |
| photovisual | 5 | source: 16 |
spectral information:
| spectral class | G0 | source: 96 | |
| Morgan-Keenan | G8-K0III | source: 25 | |
| B-magnitude | 6,04 ±0,05 | B-V-magnitude | 0,75 |
| U-magnitude | 6,51 ±0,05 | U-B-magnitude | 0,47 |
double/multiple star system information:
| separation between brightest and second brightest component | 2,8 arcsec |
| magnitude difference between brightest and second brightest component | 2,2 |
| position angle | 68 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 5,29 | G0 | l Octantis, HR 8280, HD 206240, SAO 258914 |
| B | 5,54 | G0 |
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 | |
| 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 | |
| 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: 21h 43min 27,797sec | DEC: -82° 57' 5,53'' | ±0,015 arcsec |
| position (J2000) | RA: 21h 50min 54,282sec | DEC: -82° 43' 8,5'' | |
| proper motion J1950 (FK4) | RA: 0,0348 arcsec/a | DEC: -0,033 arcsec/a | ±0,002 arcsec/a in RA ±0,003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0307 arcsec/a | DEC: -0,036 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5,5 (accuracy: 1 decimal) |
| source of visual magnitude data | Based on Durchmusterung magnitudes and visual estimates |
spectral information:
| spectral class | G0 |
| 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: 30472 |
| Durchmusterung | CP-83 722 |
| Boss General Catalogue | 30472 |
| Henry Draper Catalogue | 206240 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: 21h 50,9min | DEC: -82° 43' |
| proper motion (J2000) | RA: 0,062 arcsec/a | DEC: -0,029 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 |
| - | 1835 | 15 | 83° | 3,1'' | 5,4 | 7,6 | G8-K0III | HJ 5278 |
| 1955 | 68° | 2,8'' |
discoverer information:
| discoverer code | discoverer | reference |
| HJ 5278 | Herschel, J. | - |
notes:
| note | Lambda Oct. |