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(2021 DM)
Classification: Apollo [NEO]          SPK-ID: 54123256
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459262.5 (2021-Feb-17.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3273294062892434 0.0010656  
a 1.428241133535738 0.0021853 au
q .960735811257609 5.2058e-05 au
i 14.70438726168408 0.034456 deg
node 334.7287465370215 0.0017167 deg
peri 222.7579967237499 0.0069875 deg
M 334.4464574756303 0.07028 deg
tp 2459306.753675462830
(2021-Apr-02.25367546)
0.020148 TDB
period 623.4487117168021
1.71
1.4309
0.003918
d
yr
n .5774332246331241 0.0013253 deg/d
Q 1.895746455813867 0.0029006 au
  Orbit Determination Parameters
   # obs. used (total)      18  
   data-arc span      7 days  
   first obs. used      2021-02-16  
   last obs. used      2021-02-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .46978  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:26:05  

Additional Information
 Earth MOID = .0311208 au 
 Jupiter MOID = 3.10928 au 
 T_jup = 4.601 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 26.10   .34422 E2021D90 autocmod 2.8

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2021-Feb-28 02:39 < 00:01 Earth 0.0326800498451258 0.0324284290193923 0.032931664628664 10.2262618260245 10.2182858813084 2459273.610714359 0.4485353118776 12527.5657046176 121.510852523046 -0.130861386460796 252.28745580599 T 4 CATAB v2.0g-lin.ifort 2021-Apr-15 23:26:05 2021-Apr-15 23:26
2021-Jun-24 15:59 17:35 Earth 0.361348420545274 0.358335356475684 0.364363107642975 5.43278525316382 5.43142782168239 2459390.165888539 1054.50168068868 155068.031324086 2312.77509528338 14.0884239520967 28649.6491030596 T 4 CATAB v2.0g-lin.ifort 2021-Apr-15 23:26:05 2021-Apr-15 23:26
2156-Feb-09 09:46 6_13:00 Earth 0.362183229142406 0.234553913544943 0.490905498471575 18.9385651411212 18.9381766855072 2508561.906817437 9419.58281478391 6468210.05074634 429.497308617647 8.25977706621315 16223.0313841775 T 4 CATAB v2.0g-lin.ifort 2021-Apr-15 23:26:05 2021-Apr-15 23:26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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