| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 8 August 1932 |
| Designations | |
| (1257) Móra | |
Named after | Kráoly Móra (Hungarian astronomer)[2] |
| 1932 PE · 1928 QA 1935 KL · 1964 VO 1964 WA | |
| main-belt · (inner)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 88.80 yr (32,434 days) |
| Aphelion | 2.6962AU |
| Perihelion | 2.2815 AU |
| 2.4888 AU | |
| Eccentricity | 0.0833 |
| 3.93yr (1,434 days) | |
| 335.03° | |
| 0° 15m 3.6s / day | |
| Inclination | 3.9231° |
| 213.94° | |
| 18.983° | |
| Physical characteristics | |
| Dimensions | 10.79 km(derived)[3] 14.72±4.32 km[4] 17.05±6.10 km[5] 21.392±1.126 km[6][7] 21.47±0.64 km[8] |
| 5.28h[9] 5.2948±0.0004 h[10] 5.3±0.1 h[10] | |
| 0.051±0.007[6][7] 0.08±0.07[5] 0.096±0.007[8] 0.10±0.07[4] 0.20(assumed)[3] | |
| C[9] · S[3] B–V = 0.630[1] U–B = 0.320[1] | |
| 11.50[8] · 12.00[5] · 12.09[4] · 12.1[1] · 12.2[3][6][9] | |
1257 Móra, provisional designation1932 PE, is anasteroid from the inner regions of theasteroid belt, approximately 15 kilometers in diameter. It was discovered on 8 August 1932, by German astronomerKarl Reinmuth atHeidelberg Observatory in southwest Germany.[11] The asteroid was named after Hungarian astronomerKároly Móra [hu].[2]
Móra orbits the Sun in theinner main-belt at a distance of 2.3–2.7 AU once every 3 years and 11 months (1,434 days). Its orbit has aneccentricity of 0.08 and aninclination of 4° with respect to theecliptic.[1] Identified as1928 QA, it was first observed at Heidelberg andAlgiers Observatory in 1928, extending the body'sobservation arc by 4 years prior to its official discovery observation.[11]
American astronomerRichard Binzel and French amateur astronomerRené Roy obtained three rotationallight curves ofMóra from photometric observation taken in 1983 and 2009/11, respectively. Light curve analysis gave a well-definedrotation period between 2.28 and 2.30 hours with a change in brightness of 0.23 to 0.43magnitude (U=3/2+/3).[9][10] The short period is just above the threshold of 2.2 hours for the so-calledfast rotators.
According to the space-based surveys carried out by the JapaneseAkari satellite and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Móra measures between 14.72 and 21.47 kilometers in diameter and its surface has analbedo between 0.051 and 0.10.[4][5][6][7][8]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for stonyS-type asteroids of 0.20 and derives a shorter diameter of 10.79 kilometers,[3] while Richard Binzel classified it as a carbonaceousC-type asteroid during his photometric observations in the 1980s.[9]
Thisminor planet was named in honour of Hungarian astronomer Károly Móra (1899–1938). The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 116). As a curiosity, astronomerPaul Wild reshuffled the letters and numbers of the designation "1257 Mora" to construct a name for his discovery2517 Orma in 1968 (orma also means "trace, track" in Italian).[2]
