p1Orionis
catalogues and names
| catalogues and names | p1Ori, 7 Ori, HR 1570, HD 31295, SAO 94201, BD +9 683, WDS 04549+1009A |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | See HR 1543. |
position, motion, parallax:
| position (J2000) | RA: 4h 54min 53.8sec | DEC: +10° 9' 3'' | ||
| position (B1900) | RA: 4h 49min 23.4sec | DEC: +9° 59' 31'' | ||
| proper motion (J2000) | RA: 0.046 arcsec/a | DEC: -0.132 arcsec/a | ||
| radial velocity | 13 km/s note: variable radial velocity |
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| rotational velocity | 104 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 189.34° | latitude: -20.25° | ||
magnitude
| visual magnitude | 4.65 (V on UBV Johnson system) |
spectral / color information
| spectral class | A0Vp |
| B-V-magnitude | 0.09 |
| U-B-magnitude | 0.09 |
| R-I-magnitude |
| note (category: spectra): | Lambda Boo star, Ca, Mg 4481 wk. |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 171.6 arcsec |
| mag difference (of double or brightest multiple) | 4.2 |
| component ID | AB |
| note | Worley (1978) update of the IDS |
miscellaneous information
| note (category: group membership): | Hyades? |
| note (category: stellar radii or diameters): | Radius relative to Sun = 2.7. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 4h 54min 53.678sec | DEC: +10° 9' 3.27'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.002 arcsec/a | DEC: -0.124 arcsec/a | source: 25 | |
| radial velocity | 13 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 189.35° | latitude: -20.25° | ||
magnitude:
| visual | 4.65 (observed) | source: 25 |
| photovisual | 4.7 | source: 2 |
| photographic | 4.8 | source: 16 |
spectral information:
| spectral class | A0 | source: 96 | |
| Morgan-Keenan | A0Vp | source: 25 | |
| B-magnitude | 4.74 ±0.05 | B-V-magnitude | 0.09 |
| U-magnitude | 4.83 ±0.05 | U-B-magnitude | 0.09 |
double/multiple star system information:
| separation between brightest and second brightest component | 171.6 arcsec |
| magnitude difference between brightest and second brightest component | 4.2 |
| position angle | 248 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4.65 | A0 | p1Orionis, 7 Ori, HR 1570, HD 31295, SAO 94201 |
| B | 8.92 | A7 |
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 | |
| 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 (B1950) | RA: 4h 52min 8.44sec | DEC: +10° 4' 22.53'' | ±0.015 arcsec |
| position (J2000) | RA: 4h 54min 53.755sec | DEC: +10° 9' 2.6'' | |
| proper motion B1950 (FK4) | RA: 0.003 arcsec/a | DEC: -0.13 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0031 arcsec/a | DEC: -0.132 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.7 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 5987 |
| Durchmusterung | BD+09 683 |
| Boss General Catalogue | 5987 |
| Henry Draper Catalogue | 31295 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 4h 54.9min | DEC: +10° 9' |
| proper motion (J2000) | RA: 0.042 arcsec/a | DEC: -0.123 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 | 1887 | 6 | 248° | 171.6'' | 4.65 | 8.9 | A0V | ENG 19 |
| AC | 1907 | 1 | 4° | 33.1'' | 4.65 | 12.7 | - | BUP 72 |
discoverer information:
| discoverer code | discoverer | reference |
| ENG 19 | Engelmann, R. | - |
| BUP 72 | - | - |
notes:
| note | Pi (1) Ori. B is BD+09@682. Proper motion of B +021 -020. |