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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 | 0.000995 | 148 920
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Details...
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Orbit initial data
| Date of initial data | 07/09/2024
| | M – mean anomaly (degrees) | 8.330793
| | a – orbit major semiaxis (astronomical units) | 1.40350642
| | e – orbit eccentricity | 0.42070195
| | ω – orbit ascending node-perihelion angle (degrees) | 290.849574
| | Ω – longitude of orbit ascending node (degrees) | 207.147864
| | i – orbit inclination to the ecliptic plane (degrees) | 8.195898
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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 | 36.317707 | 1.37559164 | 0.41508688 | 286.349378 | 209.201489 | 8.094385 | 0.80460160 | 1.613373
| | 01/21/1858 | 30.941786 | 1.37583301 | 0.41507173 | 286.719907 | 208.904595 | 8.101251 | 0.80476362 | 1.613798
| | 01/29/1887 | 57.013689 | 1.37074876 | 0.41368675 | 286.764691 | 208.628539 | 8.176271 | 0.80368817 | 1.604861
| | 02/07/1916 | 88.384449 | 1.37062318 | 0.41379926 | 287.177410 | 208.265776 | 8.178397 | 0.80346032 | 1.604640
| | 02/14/1945 | 133.644240 | 1.36605472 | 0.41251065 | 287.202350 | 207.983972 | 8.206671 | 0.80254261 | 1.596624
| | 02/22/1974 | 199.171757 | 1.36606779 | 0.41246888 | 287.458342 | 207.689877 | 8.214509 | 0.80260734 | 1.596647
| | 03/02/2003 | 263.414815 | 1.36563198 | 0.41247082 | 287.897925 | 207.365265 | 8.215143 | 0.80234863 | 1.595883
| | 03/09/2032 | 229.036624 | 1.40266560 | 0.42081713 | 290.854756 | 207.062844 | 8.200574 | 0.81239989 | 1.661238
| | 03/17/2061 | 37.139401 | 1.40224325 | 0.42054097 | 291.250856 | 206.683971 | 8.201172 | 0.81254251 | 1.660488
| | 03/25/2090 | 209.636610 | 1.40201359 | 0.42055416 | 291.592302 | 206.438890 | 8.212199 | 0.81239095 | 1.660080
| | 04/03/2119 | 18.938849 | 1.40375434 | 0.42076136 | 292.040905 | 206.139950 | 8.223001 | 0.81310875 | 1.663172
| | 04/10/2148 | 151.839617 | 1.40864319 | 0.42194060 | 292.698514 | 205.864981 | 8.216307 | 0.81427943 | 1.671868
| | 04/18/2177 | 278.767236 | 1.40904437 | 0.42193308 | 293.081321 | 205.579882 | 8.227428 | 0.81452193 | 1.672583
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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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