_Fragaria.png) Shape model ofFragaria from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 1 January 1929 |
| Designations | |
| (1105) Fragaria | |
| Pronunciation | /frəˈɡɛəriə/[2] |
Named after | Fragaria[3] (flowering plant) |
| 1929 AB · 1947 KB 1977 EU · A916 MA A917 UH | |
| main-belt[1][4] · (outer) Eos[5][6] | |
| Orbital characteristics[4] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 89.13 yr (32,553 days) |
| Aphelion | 3.3288AU |
| Perihelion | 2.6915 AU |
| 3.0101 AU | |
| Eccentricity | 0.1059 |
| 5.22yr (1,908 days) | |
| 110.60° | |
| 0° 11m 19.32s / day | |
| Inclination | 10.968° |
| 116.90° | |
| 225.01° | |
| Physical characteristics | |
| 27.92±3.41 km[7] 31.518±0.346 km[8] 36.95 km(derived)[5] 37.03±3.8 km[9] 38.206±0.703 km[10] 38.41±0.46 km[11] | |
| 5.4312±0.0008 h[12] | |
| 0.1017±0.0167[10] 0.1086(derived)[5] 0.113±0.003[11] 0.1186±0.029[9] 0.128±0.008[8] 0.166±0.058[7] | |
| Tholen =ST[4][5] · U/L[13] B–V =0.776±029[4] U–B =0.419±0.049[4] | |
| 10.09[4][9][11] 10.19[5][10][14] 10.34[7] | |
1105 Fragaria/frəˈɡɛəriə/ is anEos asteroid from the outer regions of theasteroid belt. It was discovered on 1 January 1929, by German astronomerKarl Reinmuth at theHeidelberg Observatory in southwest Germany, and assigned theprovisional designation1929 AB.[1] TheS-type asteroid (ST/L) has arotation period of 5.4 hours and measures approximately 37 kilometers (23 miles) in diameter. It was named after the flowering plantFragaria (strawberry).[3]
Fragaria belongs to theEos family (606),[5][6] the largestasteroid family of theouter asteroid belt consisting of nearly 10,000 members.[15] It orbits the Sun in theouter asteroid belt at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,908 days;semi-major axis of 3.01 AU). Its orbit has aneccentricity of 0.11 and aninclination of 11° with respect to theecliptic.[4]
The asteroid was first observed as1916 MA atSimeiz Observatory in June 1916. The body'sobservation arc begins at Heidelberg in December 1928, three weeks prior to its official discovery observation.[1]
Thisminor planet was named afterFragaria, the genus offlowering plants in therose family, commonly known as strawberries.[3] The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 104).[3]
Karl Reinmuth submitted a list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between(1009) and(1200). This list also contained a sequence of 28 asteroids, starting with1054 Forsytia, that were all named after plants, in particular flowering plants(also see list of minor planets named after animals and plants).[16]
In theTholen classification,Fragaria has an ambiguousspectral type, closest to anS-type and somewhat similar to the darker and uncommonT-type asteroids (ST),[4][5] whilepolarimetric observations characterized it as an U/L-type asteroid.[13] The overall spectral type for members of the Eos family is that of aK-type.[15]: 23
In December 2017. a rotationallightcurve ofFragaria was obtained fromphotometric observations by American photometristTom Polakis at the Command Module Observatory (V02) in Arizona. Lightcurve analysis gave arotation period of5.4312±0.0008 hours with a brightness variation of0.33±0.03magnitude (U=3–).[12] Since the 1990s, the best period determinations was mady by French and Italian astronomers at ESO'sLa Silla Observatory using theESO 1-metre telescope which gave 10.88 hours (or twice the period solution) and an amplitude of 0.12magnitude (U=1).[14] As of 2018, no secure period has been obtained.[5]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Fragaria measures between 27.92 and 38.41 kilometers in diameter and its surface has analbedo between 0.1017 and 0.166.[7][8][9][10][11] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.1086 and a diameter of 36.95 kilometers based on anabsolute magnitude of 10.19.[5]
