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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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07401371057895817 4.7041e-08  
a 2.767244043631683 2.3445e-08 AU
q 2.562430043884981 1.3426e-07 AU
i 11.28980436099053 9.4642e-06 deg
node 344.0413563770267 2.7102e-05 deg
peri 107.8059771392773 8.463e-05 deg
M 289.5479764850502 7.8388e-05 deg
tp 2457329.549010738104
(2015-Nov-03.04901074)
0.00036763 JED
period 1681.394486001969
4.60
2.1368e-05
5.85e-08
d
yr
n .2141079936904102 2.7209e-09 deg/d
Q 2.972058043378384 2.518e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      863  
   data-arc span      8509 days (23.30 yr)  
   first obs. used      1991-09-14  
   last obs. used      2014-12-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46417  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 03:22:22  

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 13.2 mag n/a PDS3 (MPO 18559)  

30849 (1991 RE20)          Discovered 1991-Sep-14 by Holt, H. E. at Palomar (675)
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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