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JPL Small-Body Database Browser
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91439 (1999 RD12)
Classification: Main-belt Asteroid          SPK-ID: 2091439
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .243151973478399 4.8477e-08  
a 2.777049187235147 1.6317e-08 au
q 2.101804196912337 1.3089e-07 au
i 15.5785568905973 4.909e-06 deg
node 165.8145300467486 1.8882e-05 deg
peri 177.861946837522 2.1711e-05 deg
M 170.3748371217647 1.3046e-05 deg
tp 2458200.524405437159
(2018-Mar-23.02440544)
5.7608e-05 TDB
period 1690.338895741977
4.63
1.4898e-05
4.079e-08
d
yr
n .2129750435885091 1.8771e-09 deg/d
Q 3.452294177557957 2.0285e-08 au
  Orbit Determination Parameters
   # obs. used (total)      452  
   data-arc span      7482 days (20.48 yr)  
   first obs. used      1999-08-08  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51836  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:30:15  

Additional Information
 Earth MOID = 1.09444 au 
 Jupiter MOID = 1.97794 au 
 T_jup = 3.239 
[ 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 15.3   n/a MPO417451  

91439 (1999 RD12)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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