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30849 (1991 RE20)
Classification: Main-belt Asteroid          SPK-ID: 2030849
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07401370901277492 4.7015e-08  
a 2.767244042630901 2.3425e-08 AU
q 2.562430047292283 1.3422e-07 AU
i 11.28980463170154 9.4573e-06 deg
node 344.0413557811643 2.7093e-05 deg
peri 107.8059773703812 8.4621e-05 deg
M 289.5479772182677 7.8375e-05 deg
tp 2457329.549007135080
(2015-Nov-03.04900713)
0.00036757 JED
period 1681.394485089847
4.60
2.135e-05
5.845e-08
d
yr
n .2141079938065593 2.7186e-09 deg/d
Q 2.97205803796952 2.5159e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      900  
   data-arc span      8529 days (23.35 yr)  
   first obs. used      1991-09-14  
   last obs. used      2015-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45697  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 15:36:42  

Additional Information
 Earth MOID = 1.60562 AU 
 T_jup = 3.307 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.3 mag n/a MPO329041  

30849 (1991 RE20)          Discovered 1991-Sep-14 by Holt, H. E. at Palomar
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

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