1546 Izsák
Background asteroid
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1546 Izsák (provisional designation 1941 SG1) is a background asteroid from the outer regions of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 28 September 1941, by Hungarian astronomer György Kulin at the Konkoly Observatory near Budapest, Hungary.[12] The asteroid was named after Hungarian astronomer Imre Izsák.[2]
_Izsák.png)
Shape model of Izsák from its lightcurve | |
| 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 | 3.5686 AU |
| Perihelion | 2.7886 AU |
| 3.1786 AU | |
| Eccentricity | 0.1227 |
| 5.67 yr (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±0.006 h[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] | |
Orbit and classification
Izsák is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the outer asteroid belt at a distance of 2.8â3.6 AU once every 5 years and 8 months (2,070 days). Its orbit has an eccentricity of 0.12 and an inclination of 16° with respect to the ecliptic.[1]
The body's observation arc begins with its identification as 1935 QC at Simeiz Observatory in August 1935, more than 6 years prior to its official discovery observation at Konkoly.[12]
Naming
This minor planet was named in memory of Imre Izsák (1929â1965), a Hungarian-born astronomer and celestial mechanician, who studied the motion of artificial satellites. He also worked at the Cincinnati Observatory and the Smithsonian Astrophysical Observatory in the United States.[2] The official naming citation was published by the Minor Planet Center on 1 February 1980 (M.P.C. 5182).[13] He is also honored by a lunar crater Izsak.[2]
Physical characteristics
Izsák has been characterized as a generic X-, a metallic M- and a carbonaceous C-type asteroid, by PanSTARRS photometric survey, by the Wide-field Infrared Survey Explorer (WISE) and by the Lightcurve Data Base, respectively.[3][8][11]
Rotation period
In April 2006, a rotational lightcurve of Izsák was obtained from photometric observations by American astronomer Brian Warner at his Palmer Divide Observatory in Colorado (716). Lightcurve analysis gave a well-defined rotation period of 7.350 hours with a brightness amplitude of 0.31 magnitude (U=3).[10][a]
Poles
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°) in ecliptic coordinates (λ, β).[9]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Izsák measures between 19.31 and 28.487 kilometers in diameter and its surface has an albedo between 0.1153 and 0.249.[5][6][7][8]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 42.23 kilometers based on an absolute magnitude of 10.6.[3]
Notes
- Lightcurve plot of 1546 Izsák, Palmer Divide Observatory, Brian D. Warner (2006). Summary figures at the LCDB
