| Discovery[1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 18 October 1939 |
| Designations | |
| (2826) Ahti | |
Named after | Ahti(Finnish mythology)[2] |
| 1939 UJ · 1942 FH 1950 TG3 · 1968 UT2 1979 RG · 1980 VK1 | |
| main-belt · (outer)[1] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 77.63 yr (28,355 days) |
| Aphelion | 3.3789AU |
| Perihelion | 3.0708 AU |
| 3.2248 AU | |
| Eccentricity | 0.0478 |
| 5.79yr (2,115 days) | |
| 2.3046° | |
| 0° 10m 12.72s / day | |
| Inclination | 15.466° |
| 33.671° | |
| 150.83° | |
| Physical characteristics | |
| Dimensions | 36.60 km(derived)[3] 36.71±2.7 km(IRAS:24)[4] 39.975±0.157[5] 42.16±0.62 km[6] 42.373±0.121 km[7] 55.33±0.29 km[8] |
| 24h[9] | |
| 0.023±0.004[8][5] 0.0471±0.0122[7] 0.0479(derived)[3] 0.049±0.002[6] 0.0628±0.010(IRAS:24)[4] | |
| C[3] | |
| 11.1[1][3] · 10.80[4][6][7] · 11.00[8] · 11.25±0.25[10] | |
2826 Ahti, provisional designation1939 UJ, is a carbonaceousasteroid from the outer region of theasteroid belt, about 37 kilometers in diameter. The asteroid was discovered on 18 October 1939, by Finnish astronomerYrjö Väisälä atTurku Observatory, Southwest Finland.[11] It was named afterAhti from Finnish mythology.[2]
Ahti orbits the Sun in theouter main-belt at a distance of 3.1–3.4 AU once every 5 years and 9 months (2,115 days). Its orbit has aneccentricity of 0.05 and aninclination of 15° with respect to theecliptic.[1]
Ahti has been characterized as a darkC-type asteroid.[3]
A photmetriclightcurve analysis by French astronomerPierre Antonini in 2006, gave a longer than averagerotation period of 24 hours (U=1). The result, however, is considered to be only provisional.[3][9]
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,Ahti measures between 36.71 and 55.33 kilometers in diameter and its surface has a lowalbedo between 0.023 and 0.0628.[4][5][6][7][8]
TheCollaborative Asteroid Lightcurve Link agrees best with the results obtained by IRAS, and derives a diameter of 36.60 kilometers with an albedo of 0.0479 and anabsolute magnitude of 11.1.[3]
Thisminor planet was named for the god of the sea and of fishing,Ahti (also known as Ahto), mentioned in theKalevala, a 19th-century work of epic poetry from Karelian and Finnish oral folklore and mythology.
The asteroid1454 Kalevala is named after the Finishnational epic. Ahti is also a common masculine name in Finland.[2] The official naming citation was published by theMinor Planet Center on 26 May 1983 (M.P.C. 7949).[12]
