_Titicaca.png) Shape model ofTiticaca from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | M. Itzigsohn |
| Discovery site | La Plata Obs. |
| Discovery date | 23 September 1952 |
| Designations | |
| (1801) Titicaca | |
Named after | Lake Titicaca[2] |
| 1952 SP1 · 1963 UR | |
| main-belt · (outer) Eos[3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 64.61 yr (23,599 days) |
| Aphelion | 3.2256AU |
| Perihelion | 2.8124 AU |
| 3.0190 AU | |
| Eccentricity | 0.0684 |
| 5.25yr (1,916 days) | |
| 55.926° | |
| 0° 11m 16.44s / day | |
| Inclination | 10.972° |
| 77.603° | |
| 9.4673° | |
| Physical characteristics | |
| Dimensions | 19.31±0.41 km[5] 19.72±1.19 km[6] 21.957±0.296[7] 23.08 km(derived)[3] 23.18±2.4 km[8] 24.772±0.106 km[9] |
| 3.2106±0.0005h[10] 3.211233±0.000001 h[11] | |
| 0.1098(derived)[3] 0.1146±0.0104[9] 0.1309±0.032[8] 0.172±0.018[5][7] 0.181±0.023[6] | |
| S(assumed)[3] | |
| 11.0[6][8][9] · 11.10[5] · 11.2[1][3] · 11.32±0.22[12] | |
1801 Titicaca (prov. designation:1952 SP1) is a stonyEos asteroid from theasteroid belt, approximately 22 kilometers in diameter. It was discovered on 23 September 1952, by Argentine astronomerMiguel Itzigsohn atLa Plata Observatory in the capital of the province of Buenos Aires.[13] It was named afterLake Titicaca in South America.[2]
Titicaca is a member of theEos family (606), the largestasteroid family in theouter main belt consisting of nearly 10,000 asteroids.[4][14]: 23 It orbits the Sun at a distance of 2.8–3.2 AU once every 5 years and 3 months (1,916 days). Its orbit has aneccentricity of 0.07 and aninclination of 11° with respect to theecliptic.[1] As noprecoveries were taken, and no prior identifications were made,Titicaca'sobservation arc begins with its official discovery observation.[13]
Titicaca is an assumedS-type asteroid.[3]
In March 2007, a rotationallightcurve ofTiticaca was obtained from photometric observations taken by German amateur astronomerAxel Martin. It gave a well-definedrotation period of 3.2106 hours with a brightness variation of 0.50 inmagnitude (U=3).[10] A 2006-published lightcurve, constructed from photometry data from the Lowell photometric database, gave a concurring period of 3.211233 hours.[11]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Titicaca measures between 19.31 and 24.77 kilometers in diameter and its surface has analbedo between 0.11 and 0.18.[5][6][7][8][9] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.109 and a diameter of 23.08 kilometers.[3]
Thisminor planet was named afterLake Titicaca in the Andes, on the border of Peru and Bolivia at an altitude of 3,812 metres (12,507 feet) above sea level, the largest lake by volume in South America and one of the largest and highest lakes in the world.[2] Naming citation was published on 8 April 1982 (M.P.C. 6832).[15]
