c1Orionis
catalogues and names |
The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) |
SKY2000 - Master Star Catalog |
Smithsonian Astrophysical Observatory Star Catalog |
catalogues and names
catalogues and names | c1Ori, khi 1 Ori, 54 Ori, HR 2047, HD 39587, SAO 77705, BD +20 1162 |
constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
position (J2000) | RA: 5h 54min 22.9sec | DEC: +20° 16' 34'' | ||
position (B1900) | RA: 5h 48min 27.6sec | DEC: +20° 15' 28'' | ||
proper motion (J2000) | RA: -0.189 arcsec/a | DEC: -0.084 arcsec/a | ||
radial velocity | -14 km/s note: spectroscopic binaries |
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rotational velocity | 6 km/s (uncertain) (variable) | |||
trigonometric parallax | 0.104 arcsec | |||
galactic coordinates | longitude: 188.46° | latitude: -2.73° |
magnitude
visual magnitude | 4.41 (V on UBV Johnson system) |
spectral / color information
spectral class | G0V |
B-V-magnitude | 0.59 |
U-B-magnitude | 0.07 |
R-I-magnitude | |
IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
double/multiple star system information
number of components of multiple star system | 3 |
separation | 0.6 arcsec |
note | doublicity discoverd by occultation |
note (category: double and multiple data): | Possibly triple system. Magnitudes of separate components unknown. A*, 14.25y, a = 0.095". Probably low-mass companion. |
miscellaneous information
note (category: group membership): | In UMa cluster; Sirius group? UMa stream. |
note (category: stellar radii or diameters): | Occultation diam. = 0.0016". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 5h 54min 22.942sec | DEC: +20° 16' 34.18'' | ±0.01 arcsec | source: 41 |
proper motion (J2000) | RA: -0.0137 arcsec/a | DEC: -0.087 arcsec/a | source: 41 | |
radial velocity | -14 km/s | source: 25 | ||
trigonometric parallax | 0.111 arcsec | ±0.001 arcsec | source: 41 | |
galactic coord. (B1950) | longitude: 188.46° | latitude: -2.73° |
magnitude:
visual | 4.41 (observed) | source: 25 |
photovisual | 4.6 | source: 2 |
photographic | 5.1 | source: 16 |
spectral information:
spectral class | F8 | source: 96 | |
Morgan-Keenan | G0-VCa0.5 | source: 25 | |
B-magnitude | 5 ±0.05 | B-V-magnitude | 0.59 |
U-magnitude | 5.07 ±0.05 | U-B-magnitude | 0.07 |
double/multiple star system information:
separation between brightest and second brightest component | 0.6 arcsec |
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 | |
25 | Bright Star Catalogue, 5th edition |
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994 | |
41 | Precision Studies |
Gatewood, G., 1994, PASP, 106, 138. "One milliarcsecond precision studies in the regions of d Equilei and c' Orionis" | |
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 51min 25.196sec | DEC: +20° 16' 7.36'' | ±0.011 arcsec |
position (J2000) | RA: 5h 54min 22.931sec | DEC: +20° 16' 34.18'' | |
proper motion B1950 (FK4) | RA: -0.0133 arcsec/a | DEC: -0.086 arcsec/a | ±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: -0.0134 arcsec/a | DEC: -0.084 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 | F8 |
source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
source catalogue | GC, catalogue number: 7419 |
Durchmusterung | BD+20 1162 |
Boss General Catalogue | 7419 |
Henry Draper Catalogue | 39587 |