_Izs%25C3%25A1k.png) Shape model of Izsák from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | G. Kulin |
| Discovery site | Konkoly Obs. |
| Discovery date | 28 September 1941 |
| Designations | |
| (1546) Izsák | |
Named after | Imre Izsák[2] (Hungarian astronomer) |
| 1941 SG1 · 1935 QC 1938 FH · 1978 BF | |
| main-belt · (outer)[3] background[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 81.86 yr (29,898 days) |
| Aphelion | 3.5686AU |
| Perihelion | 2.7886 AU |
| 3.1786 AU | |
| Eccentricity | 0.1227 |
| 5.67yr (2,070 days) | |
| 77.417° | |
| 0° 10m 26.04s / day | |
| Inclination | 16.138° |
| 190.47° | |
| 280.94° | |
| Physical characteristics | |
| 19.31±0.85 km[5] 26.08±1.45 km[6] 26.438±0.139 km[7] 28.487±0.110 km[8] 42.23 km(calculated)[3] | |
| 7.33200±0.00005 h[9] 7.350±0.006h[10][a] | |
| 0.057(assumed)[3] 0.1153±0.0139[8] 0.133±0.011[7] 0.149±0.018[6] 0.249±0.029[5] | |
| X[11] · M[8] · C[3] | |
| 10.60[3][6] · 10.68±0.37[11] · 10.70[1][5][8] | |
1546 Izsák (provisional designation1941 SG1) is abackground asteroid from the outer regions of theasteroid belt, approximately 27 kilometers in diameter. It was discovered on 28 September 1941, by Hungarian astronomerGyörgy Kulin at theKonkoly Observatory near Budapest, Hungary.[12] The asteroid was named after Hungarian astronomerImre Izsák.[2]
Izsák is a non-family asteroid from the main belt'sbackground population.[4] It orbits the Sun in theouter asteroid belt at a distance of 2.8–3.6 AU once every 5 years and 8 months (2,070 days). Its orbit has aneccentricity of 0.12 and aninclination of 16° with respect to theecliptic.[1]
The body'sobservation arc begins with its identification as1935 QC atSimeiz Observatory in August 1935, more than 6 years prior to its official discovery observation at Konkoly.[12]
Thisminor planet was named in memory ofImre Izsák (1929–1965), a Hungarian-born astronomer andcelestial mechanician, who studied the motion of artificial satellites. He also worked at theCincinnati Observatory and theSmithsonian Astrophysical Observatory in the United States.[2] The official naming citation was published by theMinor Planet Center on 1 February 1980 (M.P.C. 5182).[13] He is also honored by a lunar craterIzsak.[2]
Izsák has been characterized as a genericX-, a metallicM- and a carbonaceousC-type asteroid, byPanSTARRS photometric survey, by theWide-field Infrared Survey Explorer (WISE) and by the Lightcurve Data Base, respectively.[3][8][11]
In April 2006, a rotationallightcurve of Izsák was obtained from photometric observations by American astronomerBrian Warner at his Palmer Divide Observatory in Colorado (716). Lightcurve analysis gave a well-definedrotation period of 7.350 hours with a brightness amplitude of 0.31magnitude (U=3).[10][a]
In 2016, a modeled lightcurve gave a concurring period of 7.33200 hours and determined two spin axis of (124.0°, 32.0°) and (322.0°, 60.0°) inecliptic coordinates (λ, β).[9]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA's WISE telescope, Izsák measures between 19.31 and 28.487 kilometers in diameter and its surface has analbedo between 0.1153 and 0.249.[5][6][7][8]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 42.23 kilometers based on anabsolute magnitude of 10.6.[3]
