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Asteroid General Data
General information
| Preliminary designation | 2021 HC1
| | Group | Apollo
| | Absolute magnitude | 28.06
| | Approximate diameter (m) | 7
| | Approximate mass (kg) | 5.01·105
| | Number of observations | 12
| | Arc length (days) | 2
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Approaches
Date | Object | r, AU | r, km
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| 04/14/2021 06:44:38 PM | Moon | 0.000744 | 111 248
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Details...
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Orbit initial data
| Date of initial data | 06/09/2026
| | M – mean anomaly (degrees) | 100.007809
| | a – orbit major semiaxis (astronomical units) | 1.15600065
| | e – orbit eccentricity | 0.31294884
| | ω – orbit ascending node-perihelion angle (degrees) | 97.313295
| | Ω – longitude of orbit ascending node (degrees) | 24.905898
| | i – orbit inclination to the ecliptic plane (degrees) | 5.541731
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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 | 133.485643 | 1.08054932 | 0.30098859 | 84.626862 | 27.129390 | 5.757637 | 0.75531630 | 1.123227
| | 01/21/1858 | 54.965679 | 1.08361215 | 0.30166375 | 85.020748 | 26.898835 | 5.751137 | 0.75672564 | 1.128006
| | 01/29/1887 | 309.981167 | 1.08575586 | 0.30243316 | 85.474068 | 26.648076 | 5.751031 | 0.75738728 | 1.131355
| | 02/07/1916 | 189.612026 | 1.08574192 | 0.30225271 | 85.954215 | 26.308866 | 5.745977 | 0.75757348 | 1.131333
| | 02/14/1945 | 67.931149 | 1.08499188 | 0.30212072 | 86.186216 | 26.112591 | 5.746353 | 0.75719335 | 1.130161
| | 02/22/1974 | 169.633365 | 1.11939177 | 0.30597205 | 92.126003 | 25.533866 | 5.715654 | 0.77688918 | 1.184333
| | 03/02/2003 | 331.721221 | 1.12291847 | 0.30691315 | 92.431095 | 25.174330 | 5.670754 | 0.77828002 | 1.189934
| | 03/09/2032 | 325.294739 | 1.15604242 | 0.31304295 | 97.323962 | 24.844700 | 5.542232 | 0.79415149 | 1.242972
| | 03/17/2061 | 88.733479 | 1.15641719 | 0.31321337 | 97.734558 | 24.491155 | 5.509911 | 0.79421186 | 1.243576
| | 03/25/2090 | 144.375040 | 1.16392585 | 0.31464598 | 99.001067 | 24.282519 | 5.476910 | 0.79770126 | 1.255708
| | 04/03/2119 | 188.600485 | 1.16337386 | 0.31463638 | 99.227659 | 24.003728 | 5.460112 | 0.79733411 | 1.254815
| | 04/10/2148 | 286.761437 | 1.15714879 | 0.31359912 | 98.446265 | 23.719820 | 5.444543 | 0.79426795 | 1.244757
| | 04/18/2177 | 41.077342 | 1.15715910 | 0.31364453 | 98.961953 | 23.366395 | 5.424237 | 0.79422248 | 1.244773
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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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Return to closest approaches list
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