23 Orionis
catalogues and names
| catalogues and names | NSV 16294, 23 Ori, HR 1770, HD 35149, SAO 112697, BD +3 871, WDS 05228+0333A |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 5h 22min 50sec | DEC: +3° 32' 40'' | ||
| position (B1900) | RA: 5h 17min 34.6sec | DEC: +3° 26' 54'' | ||
| proper motion (J2000) | RA: -0.004 arcsec/a | DEC: -0.002 arcsec/a | ||
| radial velocity | 18 km/s | |||
| rotational velocity | 295 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 199.16° | latitude: -17.86° | ||
| note (category: radial and/or rotational velocities): | Rapidly rotating; may become Be star. |
magnitude
| visual magnitude | 5 (V on UBV Johnson system) |
spectral / color information
| spectral class | B1V |
| B-V-magnitude | -0.15 |
| U-B-magnitude | -0.86 |
| R-I-magnitude |
double/multiple star system information
| separation | 31.9 arcsec |
| mag difference (of double or brightest multiple) | 2.2 |
| note (category: double and multiple data): | Fixed. Secondary 7.17V, -0.12(B-V), -0.63(U-B), B5Vn, B8nnp or B3V, RV -58k/s, vsini 350k/s, optical. |
miscellaneous information
| note (category: group membership): | Ori OB1a. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 22min 49.94sec | DEC: +3° 32' 40.13'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0011 arcsec/a | DEC: 0.001 arcsec/a | source: 25 | |
| radial velocity | 18 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 199.16° | latitude: -17.86° | ||
magnitude:
| visual | 5 (observed) | source: 25 |
| photovisual | 5 | source: 2 |
| photographic | 4.6 | source: 16 |
spectral information:
| spectral class | B3 | source: 96 | |
| Morgan-Keenan | B1V | source: 25 | |
| B-magnitude | 4.85 ±0.05 | B-V-magnitude | -0.15 |
| U-magnitude | 3.99 ±0.05 | U-B-magnitude | -0.86 |
double/multiple star system information:
| separation between brightest and second brightest component | 31.9 arcsec |
| magnitude difference between brightest and second brightest component | 2.19 |
| position angle | 29 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 5 | B3 | 23 Ori, HR 1770, HD 35149, SAO 112697 |
| B | 7.17 | 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: 5h 20min 12.177sec | DEC: +3° 29' 52.42'' | ±0.018 arcsec |
| position (J2000) | RA: 5h 22min 49.959sec | DEC: +3° 32' 39.82'' | |
| proper motion B1950 (FK4) | RA: -0.0005 arcsec/a | DEC: -0.001 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0003 arcsec/a | DEC: -0.002 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B3 |
| 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: 6607 |
| Durchmusterung | BD+03 871 |
| Boss General Catalogue | 6607 |
| Henry Draper Catalogue | 35149 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 5h 22.8min | DEC: +3° 33' |
| proper motion (J2000) | RA: 0.003 arcsec/a | DEC: -0.001 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 |
| - | 1821 | 33 | 28° | 31.4'' | 5 | 7.19 | B1V | STF 696 |
| 1973 | 29° | 31.9'' |
discoverer information:
| discoverer code | discoverer | reference |
| STF 696 | Struve, F.G.W. | - |
notes:
| note | 23 Ori. B is BD+03@872. Proper motion of B +018 +005. |