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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2246245012408089 4.4732e-08  
a 2.289320590400929 1.0148e-08 AU
q 1.775083094601806 1.0611e-07 AU
i 5.170741607122743 5.7632e-06 deg
node 344.1308706197207 5.1159e-05 deg
peri 70.12288074419708 5.2603e-05 deg
M 321.3803908638328 1.3624e-05 deg
tp 2457136.226209882992
(2015-Apr-23.72620988)
4.8246e-05 JED
period 1265.197568043699
3.46
8.4128e-06
2.303e-08
d
yr
n .284540540618211 1.892e-09 deg/d
Q 2.803558086200052 1.2428e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1066  
   data-arc span      23604 days (64.62 yr)  
   first obs. used      1950-03-21  
   last obs. used      2014-11-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53181  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:01:24  

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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