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JPL Small-Body Database Browser
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379768 (2011 HL21)
Classification: Main-belt Asteroid          SPK-ID: 2379768
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04563747738081793 1.4484e-07  
a 2.760463910314278 4.2747e-08 au
q 2.634483301046746 4.0295e-07 au
i 1.56407874820032 8.5326e-06 deg
node 285.7134481436267 0.00045612 deg
peri 262.52538846 0.00046456 deg
M 296.5556859478758 9.0332e-05 deg
tp 2458895.730854009047
(2020-Feb-16.23085401)
0.00042205 TDB
period 1675.218796690549
4.59
3.8913e-05
1.065e-07
d
yr
n .2148973021978933 4.9917e-09 deg/d
Q 2.88644451958181 4.4698e-08 au
  Orbit Determination Parameters
   # obs. used (total)      120  
   data-arc span      6978 days (19.10 yr)  
   first obs. used      1999-11-02  
   last obs. used      2018-12-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53458  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:13:17  

Additional Information
 Earth MOID = 1.63557 au 
 Jupiter MOID = 2.0784 au 
 T_jup = 3.340 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO418933  

379768 (2011 HL21)          Discovered 1999-Nov-02 by Spacewatch at Kitt Peak
Reference: Last Updated: 2013-11-20

Alternate Designations
 2011 HL21 = 1999 VS17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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