2 Camelopardalis
catalogues and names
| catalogues and names | 2 Cam, HR 1466, HD 29316, SAO 24744, BD +53 794, WDS 04400+5328A |
| constellation | Camelopardalis |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 4h 39min 58.1sec | DEC: +53° 28' 23'' | ||
| position (B1900) | RA: 4h 32min 2.4sec | DEC: +53° 16' 34'' | ||
| proper motion (J2000) | RA: 0.046 arcsec/a | DEC: -0.092 arcsec/a | ||
| radial velocity | 20 km/s note: variable radial velocity |
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| rotational velocity | 112 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.019 arcsec | |||
| galactic coordinates | longitude: 153.03° | latitude: 4.53° | ||
| note (category: dynamical parallaxes): | 0.004". |
magnitude
| visual magnitude | 5.35 (V on UBV Johnson system) |
spectral / color information
| spectral class | A8V |
| B-V-magnitude | 0.32 |
| U-B-magnitude | 0.07 |
double/multiple star system information
| number of components of multiple star system | 4 |
| separation | 0.3 arcsec |
| mag difference (of double or brightest multiple) | 1.6 |
| component ID | AB |
| note (category: double and multiple data): | AB 5.8 F0V, 7.4 F9V, 26.25y, a = 0.18" or 26.797y, a = 0.157". ABxC 5.6, 7.3, 425.0y, a = 1.38". Component D, 13.2v at at 24" optical. Spectral classes component A, A9V; B, F8V; C, F8V. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 4h 39min 58.083sec | DEC: +53° 28' 22.76'' | ±0.35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0.0053 arcsec/a | DEC: -0.097 arcsec/a | source: 25 | |
| radial velocity | 20 km/s | source: 25 | ||
| trigonometric parallax | 0.019 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 153.03° | latitude: 4.53° | ||
magnitude:
| visual | 5.35 (observed) | source: 25 |
| photovisual | 5.4 | source: 2 |
| photographic | 5.7 | source: 16 |
spectral information:
| spectral class | F0 | source: 96 | |
| Morgan-Keenan | A8V | source: 25 | |
| B-magnitude | 5.67 ±0.05 | B-V-magnitude | 0.32 |
| U-magnitude | 5.74 ±0.05 | U-B-magnitude | 0.07 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 2 |
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 | |
| 17 | ACRS |
| Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 1991 | |
| 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 35min 59.764sec | DEC: +53° 22' 36.89'' | ±0.019 arcsec |
| position (J2000) | RA: 4h 39min 58.095sec | DEC: +53° 28' 23.26'' | |
| proper motion B1950 (FK4) | RA: 0.0054 arcsec/a | DEC: -0.09 arcsec/a | ±0.004 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0052 arcsec/a | DEC: -0.092 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.4 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | F0 |
| 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: 5659 |
| Durchmusterung | BD+53 794 |
| Boss General Catalogue | 5659 |
| Henry Draper Catalogue | 29316 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 4h 40min | DEC: +53° 28' |
| proper motion (J2000) | RA: 0.047 arcsec/a | DEC: -0.097 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 | 1901 | 40 | ° | '' | 5.6 | 7.6 | A8V | BU 1295 |
| AB-C | 1828 | 94 | 311° | 1.6'' | - | 7.4 | - | STF 566 |
| 1990 | 215° | 0.8'' | ||||||
| AB-D | 1888 | 3 | 210° | 23.7'' | - | 13.2 | - | STF 566 |
| 1911 | 215° | 22.6'' |
discoverer information:
| discoverer code | discoverer | reference |
| BU 1295 | Burnham, S.W. | - |
| STF 566 | Struve, F.G.W. | - |
notes:
| note | 2 Cam. AB: P = 26.89yr., a = 0.177", motion retrograde. AB-C: P = 425yr., a = 1.38", motion retrograde. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 4h 32min | DEC: +53° 17' |
magnitudes, spectral classes, orbital elements:
| author: | W.D. Heintz | A. Valbousquet | W.D. Heintz |
| date of observation: | 1958 | 1978 | 1962 |
| magnitude of component A: | 5.8 | 5.8 | 5.6 |
| magnitude of component B: | 5.8 | 5.8 | 5.6 |
| spectral class component B: | A8V | A8V | |
| spectral class component B: | A8V | A8V | |
| period [y]: | 26.25 | 26.797 | 425 |
| semi-major axis [arcsec]: | 0.18 | 0.157 | 1.38 |
| inclination [deg]: | 115 | 123.58 | 131.5 |
| node [deg]: | 161 | 159.61 | 115 |
| equinox of node: | 2000 | 2000 | |
| eccentricity: | 0.54 | 0.686 | 0.3 |
| time of periastron passage: | 1965.1 | 1967.15 | 2035 |
| dates of ephemeris: | 1960-1980 | 1960-1980 | |
| grade: | reliable | reliable | preliminary |
| reference: | Veroff. Sternw. Munchen 5, 140; 1962. | Circ. Inf. No. 82, 1980. | Veroff. Sternw. Munchen 5, 140; 1962. |
| notes | The high-eccentricity solution for AB by Valbousquet (1980) is questioned by Heintz (1962) on grounds of a mass discrepancy. |
| other name(s) | STF 566 AB-C |