| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 5 February 1929 |
| Designations | |
| (1109) Tata | |
Named after | unknown[2] |
| 1929 CU · 1925 QE 1964 HA | |
| main-belt[1] · (outer)[3][4] Hygiea[5] | |
| Orbital characteristics[3] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 88.95yr (32,489 d) |
| Aphelion | 3.5443AU |
| Perihelion | 2.9085 AU |
| 3.2264 AU | |
| Eccentricity | 0.0985 |
| 5.80 yr (2,117 d) | |
| 96.944° | |
| 0° 10m 12.36s / day | |
| Inclination | 4.1199° |
| 268.08° | |
| 359.39° | |
| Physical characteristics | |
| 61.817±0.265 km[6] 62.39±0.36 km[7] 63.2±12.6 km[8] 64±6 km[9] 65.677±0.810 km[10] 66.49±1.32 km[11] 66.53±1.4 km[12] 69.640±22.05 km[13] 74.94±22.96 km[14] | |
| 8.277±0.002 h[15] | |
| 0.0378±0.002[12] 0.038±0.002[11] 0.0387±0.0080[10] 0.04±0.01[9] 0.04±0.02[8][14] 0.043±0.010[7] 0.044±0.005[6] 0.0485±0.0416[13] | |
| Tholen =FC[3][4] · P[10] B–V = 0.604[3] | |
| 9.89[13] · 9.89±0.27[16] 10.06[3][4][7][8][9][10][11][12][14] | |
1109 Tata, provisional designation1929 CU, is a dark Hygieanasteroid from the outer regions of theasteroid belt, approximately 69 kilometers (43 miles) in diameter. It was discovered on 5 February 1929, by German astronomerKarl Reinmuth at theHeidelberg-Königstuhl State Observatory in Germany.[1] Themeaning of the asteroids's name is unknown.[2]
Tata is a member of theHygiea family (601),[5] a very largefamily of carbonaceous outer-belt asteroids. The family'sparent body and namesake is the main belt'sfourth-largest asteroid,10 Hygiea.[17] It orbits the Sun in theouter asteroid belt at a distance of 2.9–3.5 AU once every 5 years and 10 months (2,117 days;semi-major axis of 3.23 AU). Its orbit has aneccentricity of 0.10 and aninclination of 4° with respect to theecliptic.[3]
The asteroid was first observed as1925 QE atSimeiz Observatory in March 1925. The body'sobservation arc begins at Heidelberg in March 1929, one month after its official discovery observation.[1]
In theTholen classification,Tata has an ambiguousspectral type, closest to the rareF-types and somewhat similar to the common carbonaceousC-type asteroids.[3][4] It has also been characterized as a primitiveP-type asteroid by the space-basedWide-field Infrared Survey Explorer (WISE).[10]
In July 2005, a rotationallightcurve ofTata was obtained fromphotometric observations by French amateur astronomerLaurent Bernasconi. Lightcurve analysis gave arotation period of 8.277 hours with a low brightness amplitude of 0.06magnitude (U=2), indicative for a spherical shape. The astronomer also reported that several other period solution could be possible.[15]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA's WISE telescope,Tata measures between 61.817 and 74.94 kilometers in diameter and its surface has analbedo between 0.0378 and 0.0485.[6][7][8][9][10][11][12][13][14]
TheCollaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0378 and a diameter of 66.53 kilometers based on anabsolute magnitude of 10.06.[4]
Any reference of thisminor planet's name to a person or occurrence is unknown.[2]
Among the many thousands ofnamed minor planets,Tata is one of 120 asteroids, for which no official naming citation has been published. All of these asteroids have low numbers between164 Eva and1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomersAuguste Charlois,Johann Palisa,Max Wolf andKarl Reinmuth.[18]
