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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 | 149 052
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Details...
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Orbit initial data
| Date of initial data | 06/09/2026
| | M – mean anomaly (degrees) | 63.360653
| | a – orbit major semiaxis (astronomical units) | 1.40279380
| | e – orbit eccentricity | 0.42068658
| | ω – orbit ascending node-perihelion angle (degrees) | 290.811504
| | Ω – longitude of orbit ascending node (degrees) | 207.125185
| | i – orbit inclination to the ecliptic plane (degrees) | 8.198674
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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 | 318.123938 | 1.36364425 | 0.41211994 | 285.527970 | 209.187705 | 8.157981 | 0.80165926 | 1.592400
| | 01/21/1858 | 20.803182 | 1.37030278 | 0.41352307 | 286.387245 | 208.881960 | 8.176064 | 0.80365097 | 1.604078
| | 01/29/1887 | 53.320406 | 1.36982255 | 0.41344330 | 286.793700 | 208.618687 | 8.178668 | 0.80347860 | 1.603235
| | 02/07/1916 | 87.193948 | 1.37024032 | 0.41370697 | 287.150008 | 208.265974 | 8.181372 | 0.80336235 | 1.603968
| | 02/14/1945 | 133.143356 | 1.36610300 | 0.41253214 | 287.207687 | 207.983345 | 8.205979 | 0.80254160 | 1.596709
| | 02/22/1974 | 198.786116 | 1.36601285 | 0.41245467 | 287.458677 | 207.690159 | 8.214574 | 0.80259448 | 1.596551
| | 03/02/2003 | 263.254267 | 1.36560955 | 0.41246713 | 287.894782 | 207.365570 | 8.215029 | 0.80234050 | 1.595844
| | 03/09/2032 | 229.036462 | 1.40266568 | 0.42081716 | 290.854767 | 207.062844 | 8.200574 | 0.81239990 | 1.661238
| | 03/17/2061 | 37.138727 | 1.40224335 | 0.42054100 | 291.250864 | 206.683969 | 8.201171 | 0.81254253 | 1.660488
| | 03/25/2090 | 209.635376 | 1.40201364 | 0.42055415 | 291.592303 | 206.438890 | 8.212199 | 0.81239098 | 1.660080
| | 04/03/2119 | 18.937687 | 1.40375405 | 0.42076130 | 292.040872 | 206.139959 | 8.223001 | 0.81310867 | 1.663172
| | 04/10/2148 | 151.835454 | 1.40864448 | 0.42194098 | 292.698587 | 205.864973 | 8.216302 | 0.81427965 | 1.671871
| | 04/18/2177 | 278.755141 | 1.40904517 | 0.42193337 | 293.081358 | 205.579897 | 8.227420 | 0.81452199 | 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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