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Asteroid General Data
General information
| Preliminary designation | 2021 SP
| | Group | Apollo
| | Absolute magnitude | 29.22
| | Approximate diameter (m) | 4
| | Approximate mass (kg) | 1.01·105
| | Number of observations | 9
| | Arc length (days) | 2
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Approaches
Date | Object | r, AU | r, km
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| 03/27/1811 11:34:05 PM | Moon | 0.000811 | 121 344
| | 09/17/2021 11:45:36 AM | Earth | 0.000093 | 13 917
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Details...
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Orbit initial data
| Date of initial data | 03/31/2024
| | M – mean anomaly (degrees) | 131.379734
| | a – orbit major semiaxis (astronomical units) | 1.45525752
| | e – orbit eccentricity | 0.46213743
| | ω – orbit ascending node-perihelion angle (degrees) | 252.431843
| | Ω – longitude of orbit ascending node (degrees) | 174.543550
| | i – orbit inclination to the ecliptic plane (degrees) | 4.818091
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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 | 192.228897 | 1.15179153 | 0.42122587 | 98.127590 | 353.966462 | 0.201969 | 0.66662714 | 1.236122
| | 01/21/1858 | 5.144497 | 1.15150993 | 0.42105934 | 98.406568 | 353.819231 | 0.198992 | 0.66665591 | 1.235669
| | 01/29/1887 | 183.005475 | 1.15108856 | 0.42114061 | 98.320766 | 353.943048 | 0.196775 | 0.66631843 | 1.234991
| | 02/07/1916 | 0.875386 | 1.15099582 | 0.42104701 | 98.182564 | 354.142733 | 0.193286 | 0.66637247 | 1.234842
| | 02/14/1945 | 202.938160 | 1.14525067 | 0.41940370 | 98.247220 | 354.051341 | 0.184897 | 0.66492830 | 1.225608
| | 02/22/1974 | 57.900933 | 1.15002155 | 0.41955505 | 99.400778 | 353.085142 | 0.174915 | 0.66752420 | 1.233274
| | 03/02/2003 | 272.357461 | 1.14702610 | 0.41877920 | 99.839954 | 352.863895 | 0.169248 | 0.66667542 | 1.228459
| | 03/09/2032 | 319.350737 | 1.45549681 | 0.46217326 | 252.548790 | 174.449664 | 4.816716 | 0.78280511 | 1.755972
| | 03/17/2061 | 150.932754 | 1.45483293 | 0.46203384 | 252.844814 | 174.123072 | 4.824664 | 0.78265088 | 1.754770
| | 03/25/2090 | 337.679530 | 1.45610092 | 0.46270871 | 253.306405 | 173.818771 | 4.827425 | 0.78235034 | 1.757065
| | 04/03/2119 | 111.435667 | 1.46534787 | 0.46445129 | 253.172171 | 173.458079 | 4.786201 | 0.78476516 | 1.773829
| | 04/10/2148 | 239.429347 | 1.46556754 | 0.46461776 | 253.599770 | 173.140582 | 4.782055 | 0.78463884 | 1.774228
| | 04/18/2177 | 7.090489 | 1.46499368 | 0.46426715 | 254.077623 | 172.727517 | 4.793468 | 0.78484524 | 1.773186
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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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