_Martir.png) Shape model ofMartir from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | M. Itzigsohn |
| Discovery site | La Plata Obs. |
| Discovery date | 15 June 1950 |
| Designations | |
| (1582) Martir | |
Named after | Eva Perón (First Lady of Argentina)[2] |
| 1950 LY | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 67.05 yr (24,490 days) |
| Aphelion | 3.5573AU |
| Perihelion | 2.7521 AU |
| 3.1547 AU | |
| Eccentricity | 0.1276 |
| 5.60yr (2,047 days) | |
| 29.638° | |
| 0° 10m 33.24s / day | |
| Inclination | 11.608° |
| 93.914° | |
| 128.10° | |
| Physical characteristics | |
| Dimensions | 34.42±10.19 km[4] 36.32±0.56 km[5] 36.69 km(derived)[3] 36.79±2.6 km[6] 37.06±12.76 km[7] 37.252±0.111 km[8] 39.47±0.46 km[9] 39.969±0.292 km[10] |
| 9.84±0.01h[11][a] 15.665±0.004 h(dated)[12] 15.757±0.005 h(dated)[13] | |
| 0.038±0.010[9] 0.04±0.03[7] 0.0435(derived)[3] 0.0483±0.0057[10] 0.05±0.04[4] 0.054±0.008[8] 0.0570±0.009[6] 0.060±0.002[5] | |
| C[3][14] | |
| 10.90[5][6][10] · 11.20[3][7][9] · 11.26[4] · 11.3[1] · 11.35±0.29[14] | |
1582 Martir, provisional designation1950 LY, is a carbonaceous backgroundasteroid from the outer regions of theasteroid belt, approximately 37 kilometers in diameter. It was discovered on 15 June 1950, by Argentine astronomerMiguel Itzigsohn at theLa Plata Astronomical Observatory in Argentina.[15] The asteroid was named after the First Lady of Argentina,Eva Perón.[2]
Martir is a background asteroid that does not belong to any knownasteroid family. It orbits the Sun in theouter main-belt at a distance of 2.8–3.6 AU once every 5 years and 7 months (2,047 days). Its orbit has aneccentricity of 0.13 and aninclination of 12° with respect to theecliptic.[1] The body'sobservation arc begins at the discovering observatory with its official discovery observation.[15]
Martir has been characterized as a carbonaceousC-type asteroid byPanSTARRS photometric survey.[14]
In May 2000, a rotationallightcurve ofMartir was obtained from photometric observations by American astronomerBrian Warner at his Palmer Divide Observatory (716) in Colorado. After a review of the previous lightcurve analysis, a half-period solution with a fit on a monomodal lightcurve gave a revisedrotation period of 9.84 hours with a brightness amplitude of 0.31magnitude (U=2).[11][a] This result supersedes two previous analysis that gave a period of 15.665 and 15.757 hours.[12][13]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Martir measures between 34.42 and 39.969 kilometers in diameter and its surface has analbedo between 0.038 and 0.060.[4][5][6][7][8][9][10]
TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0435 and a diameter of 36.69 kilometers based on anabsolute magnitude of 11.2.[3]
Thisminor planet was named in homage to the First Lady of Argentina,Eva Perón (1919–1952). The name translates from Spanish to "martyr" and refers to her efforts towards social justice. The officialnaming citation was published by theMinor Planet Center in January 1953 (M.P.C. 877).[2][16] The discoverer also named the asteroids1569 Evita,1581 Abanderada,1588 Descamisada and1589 Fanatica in tribute to Perón.
