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6648 (1991 PM11)
Classification: Main-belt Asteroid          SPK-ID: 2006648
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 .2411289948688506 6.3916e-08  
a 2.546946008181763 1.9191e-08 AU
q 1.932803477243663 1.6106e-07 AU
i 4.785271390977116 7.8562e-06 deg
node 327.5253805838659 6.1414e-05 deg
peri 33.94534423477672 6.3975e-05 deg
M 253.8865368348875 2.3257e-05 deg
tp 2457438.118852079624
(2016-Feb-19.61885208)
9.9547e-05 JED
period 1484.663510637931
4.06
1.678e-05
4.594e-08
d
yr
n .2424791863075525 2.7405e-09 deg/d
Q 3.161088539119862 2.3818e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1136  
   data-arc span      13164 days (36.04 yr)  
   first obs. used      1978-06-01  
   last obs. used      2014-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5283  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:14:59  

Additional Information
 Earth MOID = .931997 AU 
 T_jup = 3.396 
[ 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 12.9 mag n/a MPO263408  
diameter diameter 7.59 km 0.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
geometric albedo albedo 0.1937   0.038 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2

6648 (1991 PM11)          Discovered 1991-Aug-09 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 PM11 = 1926 SB = 1978 LD = 1987 RR6 = 1987 SA27 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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