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442618 (2012 RF21)
Classification: Main-belt Asteroid          SPK-ID: 2442618
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1999340507585577 4.8449e-08  
a 2.245868592317676 2.7417e-08 au
q 1.796842987184184 1.117e-07 au
i 1.570445721566359 8.139e-06 deg
node 254.6711010394749 0.00023994 deg
peri 60.40343158945726 0.00024384 deg
M 133.1961169708612 4.1513e-05 deg
tp 2458545.654394785438
(2019-Mar-03.15439479)
0.00013557 TDB
period 1229.348284327719
3.37
2.2512e-05
6.163e-08
d
yr
n .2928380871307512 5.3624e-09 deg/d
Q 2.694894197451169 3.2899e-08 au
  Orbit Determination Parameters
   # obs. used (total)      82  
   data-arc span      4251 days (11.64 yr)  
   first obs. used      2008-04-14  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62664  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 22:53:03  

Additional Information
 Earth MOID = .783722 au 
 Jupiter MOID = 2.59019 au 
 T_jup = 3.604 
[ 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 18.1   n/a MPO343099  

442618 (2012 RF21)          Discovered 2008-Apr-14 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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