g Canis Minoris
catalogues and names
| catalogues and names | g CMi, NSV 17480, 4 CMi, HR 2854, HD 58972, SAO 115478, BD +9 1660, WDS 07282+0856A |
| constellation | Canis Minor |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 7h 28min 9.8sec | DEC: +8° 55' 32'' | ||
| position (B1900) | RA: 7h 22min 43.1sec | DEC: +9° 7' 41'' | ||
| proper motion (J2000) | RA: -0.062 arcsec/a | DEC: 0.017 arcsec/a | ||
| radial velocity | 47 km/s note: spectroscopic binaries, single lined spectra note: orbital data avaible |
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| rotational velocity | <17 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.019 arcsec | |||
| galactic coordinates | longitude: 209.05° | latitude: 12.18° | ||
magnitude
| visual magnitude | 4.32 (V on UBV Johnson system) |
spectral / color information
| spectral class | K3-IIIFe-0.5 |
| B-V-magnitude | 1.43 |
| U-B-magnitude | 1.54 |
| 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 | 4 |
| separation | 130 arcsec |
| mag difference (of double or brightest multiple) | 5.9 |
| component ID | AD |
| note (category: spectroscopic binaries): | 389.0d, K 18.6k/s, V0 +46.8k/s, asini 94.6. Unresolved by speckle interferometry. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 7h 28min 9.779sec | DEC: +8° 55' 31.88'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: -0.0042 arcsec/a | DEC: 0.011 arcsec/a | source: 25 | |
| radial velocity | 47 km/s | source: 25 | ||
| trigonometric parallax | 0.019 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 209.05° | latitude: 12.18° | ||
magnitude:
| visual | 4.32 (observed) | source: 25 |
| photovisual | 4.6 | source: 2 |
| photographic | 6 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K3IIIFe-1 | source: 25 | |
| B-magnitude | 5.75 ±0.05 | B-V-magnitude | 1.43 |
| U-magnitude | 7.29 ±0.05 | U-B-magnitude | 1.54 |
double/multiple star system information:
| separation between brightest and second brightest component | 29.6 arcsec |
| magnitude difference between brightest and second brightest component | 9 |
| position angle | 240 ° |
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 | |
| 52 | PPMN-HP subset |
| PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H) | |
| 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: 7h 25min 26.447sec | DEC: +9° 1' 42.2'' | ±0.017 arcsec |
| position (J2000) | RA: 7h 28min 9.783sec | DEC: +8° 55' 32.47'' | |
| proper motion B1950 (FK4) | RA: -0.0043 arcsec/a | DEC: 0.015 arcsec/a | ±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0042 arcsec/a | DEC: 0.017 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 | K0 |
| 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: 9974 |
| Durchmusterung | BD+09 1660 |
| Boss General Catalogue | 9974 |
| Henry Draper Catalogue | 58972 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 7h 28.2min | DEC: +8° 56' |
| proper motion (J2000) | RA: -0.064 arcsec/a | DEC: 0.012 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 | 1836 | 5 | 247° | 34.6'' | 4.32 | 13.3 | K3III | LAM 4 |
| 1984 | 240° | 29.6'' | ||||||
| AC | 1911 | 1 | 262° | 119.2'' | 4.32 | 12.3 | - | LAM 4 |
discoverer information:
| discoverer code | discoverer | reference |
| LAM 4 | Lamont, J. von | - |
notes:
| note | Gamma CMi. A is a spectroscopic binary. |