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Asteroid General Data
General information
| Preliminary designation | 2021 HE1
| | Group | Apollo
| | Absolute magnitude | 28.92
| | Approximate diameter (m) | 4
| | Approximate mass (kg) | 1.53·105
| | Number of observations | 47
| | Arc length (days) | 2
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Approaches
Date | Object | r, AU | r, km
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| 04/17/2021 01:40:48 AM | Moon | 0.000996 | 149 047
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Details...
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Orbit initial data
| Date of initial data | 03/31/2024
| | M – mean anomaly (degrees) | 309.060849
| | a – orbit major semiaxis (astronomical units) | 1.40359896
| | e – orbit eccentricity | 0.42074575
| | ω – orbit ascending node-perihelion angle (degrees) | 290.846178
| | Ω – longitude of orbit ascending node (degrees) | 207.148953
| | i – orbit inclination to the ecliptic plane (degrees) | 8.195984
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Details...
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Orbital evolution
Date | M | a | e | ω | Ω | i | q | P
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| 01/13/1829 | 325.467690 | 1.36540657 | 0.41239417 | 285.701675 | 209.182765 | 8.171190 | 0.80232085 | 1.595488
| | 01/21/1858 | 21.239883 | 1.37026193 | 0.41351312 | 286.387371 | 208.880639 | 8.175776 | 0.80364064 | 1.604006
| | 01/29/1887 | 53.579109 | 1.36987463 | 0.41345548 | 286.790186 | 208.621446 | 8.178803 | 0.80349246 | 1.603326
| | 02/07/1916 | 87.279716 | 1.37027084 | 0.41371426 | 287.152122 | 208.265998 | 8.181154 | 0.80337026 | 1.604022
| | 02/14/1945 | 133.179151 | 1.36609925 | 0.41253055 | 287.207256 | 207.983382 | 8.206017 | 0.80254158 | 1.596702
| | 02/22/1974 | 198.814359 | 1.36601673 | 0.41245573 | 287.458633 | 207.690140 | 8.214559 | 0.80259531 | 1.596558
| | 03/02/2003 | 263.265869 | 1.36561120 | 0.41246746 | 287.894986 | 207.365548 | 8.215027 | 0.80234101 | 1.595847
| | 03/09/2032 | 229.036481 | 1.40266567 | 0.42081716 | 290.854752 | 207.062845 | 8.200573 | 0.81239989 | 1.661238
| | 03/17/2061 | 37.138782 | 1.40224334 | 0.42054100 | 291.250849 | 206.683970 | 8.201171 | 0.81254252 | 1.660488
| | 03/25/2090 | 209.635468 | 1.40201364 | 0.42055416 | 291.592289 | 206.438891 | 8.212199 | 0.81239098 | 1.660080
| | 04/03/2119 | 18.937773 | 1.40375407 | 0.42076131 | 292.040860 | 206.139959 | 8.223000 | 0.81310867 | 1.663172
| | 04/10/2148 | 151.835743 | 1.40864439 | 0.42194096 | 292.698568 | 205.864974 | 8.216302 | 0.81427963 | 1.671871
| | 04/18/2177 | 278.755966 | 1.40904512 | 0.42193336 | 293.081341 | 205.579896 | 8.227420 | 0.81452198 | 1.672584
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Detailed table...
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Graphs...
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3D animation...
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Calculation on the date...
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