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441440 (2008 HU21)
Classification: Main-belt Asteroid          SPK-ID: 2441440
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1666293400906608 8.6372e-08  
a 3.144112815365113 4.8919e-08 au
q 2.620211371770234 2.9128e-07 au
i 11.63480270680392 1.5089e-05 deg
node 225.5495970424851 3.2335e-05 deg
peri 61.10127777695151 5.9682e-05 deg
M 18.037546512317 4.7698e-05 deg
tp 2458898.471718614075
(2020-Feb-18.97171861)
0.00026919 TDB
period 2036.318036593932
5.58
4.7525e-05
1.301e-07
d
yr
n .1767896730916148 4.126e-09 deg/d
Q 3.668014258959991 5.7071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      106  
   data-arc span      5385 days (14.74 yr)  
   first obs. used      2004-10-04  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59632  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 10:35:57  

Additional Information
 Earth MOID = 1.62841 au 
 Jupiter MOID = 1.5598 au 
 T_jup = 3.156 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO477081  

441440 (2008 HU21)          Discovered 2008-Apr-26 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02

[ 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
1967-Mar-05 15:25 00:04 Jupiter 1.93719184584097 1.93718902595236 1.93719466576206 2.00905148841684 1.77814593773091 2439555.142357583 4.3978965111565 823.372094195811 126.150511984618 -80.7805739100972 1319649.83897521 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
1977-Aug-18 09:16 00:03 Jupiter 1.59528361941103 1.59528219731964 1.59528504150542 3.18218049477796 3.01070827697777 2443373.886152597 2.72440297448265 412.358205639393 63.2873761967789 87.9547098232901 787520.367425338 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
1988-Mar-26 01:09 00:02 Jupiter 1.72696669902777 1.72696492401491 1.72696847404269 3.89219977474763 3.7640778919651 2447246.547719270 1.87526297456536 202.1449240469 64.150145382551 -74.5858348436081 892201.808755969 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2072-Dec-24 13:05 00:04 Jupiter 1.68241586671013 1.68241344681878 1.68241828660972 2.72171920619577 2.52998878559444 2478201.045122164 4.43881951120622 400.259932974692 140.52188086361 83.7133036684727 756880.366713697 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2083-Jul-27 09:38 00:05 Jupiter 1.63875345553682 1.63875125321226 1.63875565790674 3.72438185001226 3.58291503438936 2482067.901300785 4.93588285365949 577.756096394482 58.776129661457 -82.1299282246936 817547.071406268 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2168-May-24 18:01 00:13 Jupiter 1.79656727828401 1.79656129292855 1.7965732639103 2.07267806287777 1.8311362549129 2513050.250513062 12.8206187342103 1457.11675869545 215.661455856759 -65.9806811320283 1035479.02827013 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2178-Nov-29 04:11 00:12 Jupiter 1.60932283137745 1.60932126761123 1.6093243952303 3.43094049344894 3.27394380564941 2516890.674240353 11.6465245388087 1303.7621420806 61.2311197994028 89.8878151763212 724468.641059112 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2189-Jul-02 04:24 00:13 Jupiter 1.89054544921937 1.8905366595191 1.89055423912661 4.32950837844856 4.22475813243735 2520758.683361545 13.02660980911 1102.20477023363 62.5799254193901 -67.9121806115328 1076875.43587381 T 11 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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