| Discovery[1] | |
|---|---|
| Discovered by | G. Kulin |
| Discovery site | Konkoly |
| Discovery date | 12 March 1940 |
| Designations | |
| (7317) Cabot | |
Named after | John Cabot[1] (Italian explorer) |
| 1940 ED · 1983 JH 1987 OV1 | |
| main-belt[1][2] · (inner) background[3] · Flora[4] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 34.79yr (12,706 d) |
| Aphelion | 2.6836AU |
| Perihelion | 1.9780 AU |
| 2.3308 AU | |
| Eccentricity | 0.1514 |
| 3.56 yr (1,300 d) | |
| 283.55° | |
| 0° 16m 37.2s / day | |
| Inclination | 3.9844° |
| 182.64° | |
| 54.312° | |
| Physical characteristics | |
| 3.62 km(calculated)[4] 3.66±0.86 km[5] 5.363±0.257 km[6][7] | |
| 2.237±0.0003 h[8] | |
| 0.185±0.034[6][7] 0.24±0.12[5] 0.24(assumed)[4] | |
| S(assumed)[4] | |
| 13.8[7] 13.922±0.003(R)[8] 14.0[2] 14.08±1.52[9] 14.33[5] 14.37[4] | |
7317 Cabot, provisional designation1940 ED, is a backgroundasteroid in aresonance with Jupiter, located the inner regions of theasteroid belt, approximately 3.6 kilometers (2.2 miles) in diameter. It was discovered on 12 March 1940, by Hungarian astronomerGyörgy Kulin at theKonkoly Observatory in Budapest.[1] The presumedS-type asteroid has arotation period of 2.2 hours.[4] It was named after Italian explorerJohn Cabot.[1]
Cabot is located in a 10:3orbital resonance with Jupiter (10/3J),[10] a mean-motion resonance of moderate order and a location of orbital instability. Asteroids in these resonances are known for their chaotic orbits with a relatively shortLyapunov time.[11] It is a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[3] Based on osculating Keplerianorbital elements, the asteroid has also been classified as a member of theFlora family (402), a giantasteroid family and the largest family of stony asteroids in the main-belt.[4]
It orbits the Sun in theinner asteroid belt at a distance of 2.0–2.7 AU once every 3 years and 7 months (1,300 days;semi-major axis of 2.33 AU). Its orbit has aneccentricity of 0.15 and aninclination of 4° with respect to theecliptic.[2] The body'sobservation arc begins with its observation as1983 JH atKlet Observatory in May 1983, or more than 43 years after to its official discovery observation at Konkoly.[1]
Cabot is an assumed, stonyS-type asteroid.[4]
In January 2011, a fragmentary rotationallightcurve ofCabot was obtained fromphotometric observations in the R-band by astronomers at thePalomar Transient Factory in California. Lightcurve analysis gave a poorly definedrotation period of 2.237 hours with a brightness amplitude of 0.10magnitude (U=1).[8] As of 2018, no secure period has been published.[4]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Cabot measures 3.66 and 5.363 kilometers in diameter and its surface has analbedo of 0.185 and 0.24, respectively.[5][6][7] TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from8 Flora, theparent body of the Flora family – and calculates a diameter of 3.62 kilometers based on anabsolute magnitude of 14.37.[4]
Thisminor planet was named after Italian explorerJohn Cabot (Giovanni Caboto; c. 1450–1499), who discovered the coast ofNorth America in 1497, the first recorded landfall since the Norse voyages. The Venetian navigator sailed from Bristol under the commission ofHenry VII of England.[1] The official naming citation was published by theMinor Planet Center on 20 June 1997 (M.P.C. 30101).[12]
