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JPL Small-Body Database Browser
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66810 (1999 UM4)
Classification: Main-belt Asteroid          SPK-ID: 2066810
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2565572164704465 5.6369e-08  
a 2.704036224068685 1.7634e-08 au
q 2.010296217186367 1.5699e-07 au
i 13.92749858768344 6.6129e-06 deg
node 230.6349484471118 2.4836e-05 deg
peri 87.83843003044014 2.7769e-05 deg
M 308.4629535002762 1.2295e-05 deg
tp 2459233.006024381652
(2021-Jan-18.50602438)
5.6144e-05 TDB
period 1624.116523205173
4.45
1.5887e-05
4.35e-08
d
yr
n .2216589726515094 2.1682e-09 deg/d
Q 3.397776230951004 2.2158e-08 au
  Orbit Determination Parameters
   # obs. used (total)      646  
   data-arc span      7613 days (20.84 yr)  
   first obs. used      1998-06-19  
   last obs. used      2019-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5791  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:41:31  

Additional Information
 Earth MOID = 1.05517 au 
 Jupiter MOID = 2.14224 au 
 T_jup = 3.277 
[ 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 14.4   n/a MPO426392  

66810 (1999 UM4)          Discovered 1999-Oct-29 by Spacewatch at Kitt Peak
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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