_ITA.png) Shape model ofITA from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | P. F. Shajn |
| Discovery site | Simeiz Obs. |
| Discovery date | 10 September 1948 |
| Designations | |
| (1735) ITA | |
Named after | Institute for Theoretical Astronomy(USSR)[2] |
| 1948 RJ1 · 1929 DA 1931 RF1 · 1934 BC 1935 GC · 1937 TN 1948 TB1 · 1948 TK 1951 DL · 1951 EY 1952 HN2 · 1952 JB A907 GC | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 109.99 yr (40,173 days) |
| Aphelion | 3.5471AU |
| Perihelion | 2.7277 AU |
| 3.1374 AU | |
| Eccentricity | 0.1306 |
| 5.56yr (2,030 days) | |
| 198.34° | |
| 0° 10m 38.64s / day | |
| Inclination | 15.608° |
| 9.3378° | |
| 276.02° | |
| Physical characteristics | |
| Dimensions | 61.87±0.65 km[4] 61.93 km(derived)[3] 62.34±2.4 km[5] 66.09±1.13 km[6] |
| 12.599±0.003h[7] 12.6±0.1 h[7] 12.6103±0.0005 h[8] | |
| 0.0461(derived)[3] 0.051±0.011[4] 0.070±0.003[6] 0.0790±0.007[5] | |
| C[3] | |
| 9.4[5][6] · 9.90[4] · 10.0[1][3] · 10.37±0.78[9] | |
1735 ITA (prov. designation:1948 RJ1) is a carbonaceousasteroid from the outer region of theasteroid belt, approximately 62 kilometers in diameter. It was discovered on 10 September 1948, by Soviet–Russian astronomerPelageya Shajn at theSimeiz Observatory located on the Crimean peninsula.[10] It was named for theInstitute for Theoretical Astronomy (ITA) in what is nowSaint Petersburg, Russia.[2]
ITA orbits the Sun in theouter main-belt at a distance of 2.7–3.5 AU once every 5 years and 7 months (2,030 days). Its orbit has aneccentricity of 0.13 and aninclination of 16° with respect to theecliptic.[1]
It was first identified asA907 GC atHeidelberg Observatory in 1907, extending the body'sobservation arc by 41 years prior to its official discovery observation.[10]
ITA has been characterized as a carbonaceousC-type asteroid.[3]
In November 2004, a rotationallightcurve was obtained by French amateur astronomerRené Roy, gave arotation period of 12.599 hours with a brightness variation of 0.27magnitude (U=3-).[7] In March 2007, astronomers Laurent Brunetto and Jean-Gabriel Bosch derived a concurring period of 12.6 hours with and amplitude of 0.40 magnitude (U=2-)[7] A 2016-published light-curve from the Lowell Photometric Database gave a period of 12.6103 hours (U=n.a.).[8]
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,ITA measures between 61.87 and 66.09 kilometers in diameter, and its surface has analbedo between 0.051 and 0.079.[4][5][6] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0461 and a diameter of 61.93 kilometers with anabsolute magnitude of 10.0.[3]
Between 2009 and 2023, 1735 ITA has been observed tooccult four stars.
Thisminor planet was named in 1979, on the occasion of the 60th anniversary of the founding of theUSSR Academy of Sciences' Institute for Theoretical Astronomy (ITA), in what was thenLeningrad.[2] The official naming citation was published by theMinor Planet Center on 1 June 1980 (M.P.C. 5357).[11]
