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

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2257642479785755 2.9553e-08  
a 2.288514486379734 5.9124e-09 au
q 1.771849734374138 6.7707e-08 au
i 5.168078936315041 3.7041e-06 deg
node 344.0891010281431 3.6928e-05 deg
peri 70.11036816931629 3.7708e-05 deg
M 170.6196772532958 9.2517e-06 deg
tp 2458401.184457105352
(2018-Oct-09.68445711)
3.1399e-05 TDB
period 1264.529384390837
3.46
4.9004e-06
1.342e-08
d
yr
n .2846908932633648 1.1033e-09 deg/d
Q 2.805179238385331 7.2472e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1919  
   data-arc span      25656 days (70.24 yr)  
   first obs. used      1950-03-21  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49252  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:29:58  

Additional Information
 Earth MOID = .790962 au 
 Jupiter MOID = 2.5871 au 
 T_jup = 3.561 
[ 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 13.8   n/a MPO328741  

6311 Porubcan (1990 RQ2)          Discovered 1990-Sep-15 by Holt, H. E. at Palomar
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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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