| Discovery[1] | |
|---|---|
| Discovered by | M. Laugier |
| Discovery site | Uccle Obs. |
| Discovery date | 30 August 1932 |
| Designations | |
| (1247) Memoria | |
| Pronunciation | /mɪˈmɔːriə/[2] |
Named after | memoria[3] (Latin for memory;remembrance) |
| 1932 QA · 1927 UL 1931 JU · 1936 FN A905 WA | |
| main-belt · (outer) Themis[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 112.03 yr (40,920 days) |
| Aphelion | 3.6792AU |
| Perihelion | 2.5851 AU |
| 3.1321 AU | |
| Eccentricity | 0.1747 |
| 5.54yr (2,025 days) | |
| 130.45° | |
| 0° 10m 40.08s / day | |
| Inclination | 1.7780° |
| 161.73° | |
| 139.43° | |
| Physical characteristics | |
| Dimensions | 35.97±1.9 km[5] 38.906±0.174 km[6] |
| 0.078±0.014[7] 0.0846±0.009[5] | |
| Tholen =CXF[1] B–V = 0.680[1] U–B = 0.290[1] | |
| 10.52[1] | |
1247 Memoria, provisional designation1932 QA, is a dark Themistianasteroid from the outer regions of theasteroid belt, approximately 37 kilometers in diameter. It was discovered byMarguerite Laugier atUccle Observatory in 1932, who later named itMemoria in memory of her pleasant stay at the discovering observatory.
Memoria was discovered on 30 August 1932, by French astronomerMarguerite Laugier at theRoyal Observatory of Belgium in Uccle.[8] On the same night, it was independently discovered by Soviet astronomerGrigory Neujmin at theSimeiz Observatory on the Crimean peninsula. One week later, on 6 September 1932, it was again independently discovered by German astronomerKarl Reinmuth atHeidelberg Observatory.[3] TheMinor Planet Center only recognizes the first discoverer.[8]
Memoria belongs to theThemis family (602), a very largefamily of typically carbonaceous asteroids, named after24 Themis.[4][9]: 23 It orbits the Sun in theouter main-belt at a distance of 2.6–3.7 AU once every 5 years and 6 months (2,025 days;semi-major axis of 3.13 AU). Its orbit has aneccentricity of 0.17 and aninclination of 2° with respect to theecliptic.[1]
The asteroid was first observed asA905 WA at Heidelberg Observatory in November 1905. The body'sobservation arc begins as1931 JU atJohannesburg Observatory in May 1931, or 15 months prior to its official discovery observation at Uccle.[8]
In theTholen classification,Memoria'sspectral type is ambiguous, closest to a carbonaceousC-type, and somewhat similar to anX- andF-type asteroid (CXF).[1] The overall spectral type for members of the Themis family is that of a C-type.[9]: 23
As of 2018, no rotationallightcurve ofMemoria has been obtained from photometric observations. The asteroid'srotation period, shape and poles remain unknown.[1][10]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Memoria measures 35.97 and 38.906 kilometers in diameter and its surface has analbedo of 0.0846 and 0.078, respectively.[6][7]
Thisminor planet was named "memoria" (Latin formemory orremembrance) by the French discoverer Marguerite Laugier who remembered the pleasant relationships she had during her stay at the discovering Uccle Observatory, Belgium, in 1932. The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 115).[3]
