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6311 Porubcan (1990 RQ2)
Classification: Main-belt Asteroid          SPK-ID: 2006311
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2246245029816878 4.5104e-08  
a 2.289320590652181 1.0167e-08 AU
q 1.775083090811191 1.0688e-07 AU
i 5.170741475601805 5.7638e-06 deg
node 344.1308818089434 5.2033e-05 deg
peri 70.12286959132281 5.3431e-05 deg
M 321.3803906349591 1.3628e-05 deg
tp 2457136.226210709698
(2015-Apr-23.72621071)
4.8261e-05 JED
period 1265.197568251981
3.46
8.4282e-06
2.308e-08
d
yr
n .2845405405713688 1.8955e-09 deg/d
Q 2.803558090493171 1.2451e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1052  
   data-arc span      23559 days (64.50 yr)  
   first obs. used      1950-03-21  
   last obs. used      2014-09-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52998  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:06:46  

Additional Information
 Earth MOID = .793812 AU 
 T_jup = 3.560 
[ 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 13.7 mag n/a MPO265991  

6311 Porubcan (1990 RQ2)          Discovered 1990-Sep-15 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1990 RQ2 = 1976 SR = 1978 GZ = 1981 BX = 1983 RW1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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