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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 ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2410892463279617 6.0225e-08  
a 2.547485230880971 1.7252e-08 au
q 1.933313936536264 1.5374e-07 au
i 4.785183546587246 7.5848e-06 deg
node 327.5237008309674 6.0858e-05 deg
peri 33.88723397809616 6.3317e-05 deg
M 350.9107034693469 2.2668e-05 deg
tp 2457437.996757190686
(2016-Feb-19.49675719)
9.3786e-05 JED
period 1485.135020419122
4.07
1.5086e-05
4.13e-08
d
yr
n .2424022025272853 2.4624e-09 deg/d
Q 3.161656525225677 2.1411e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1165  
   data-arc span      13660 days (37.40 yr)  
   first obs. used      1978-06-01  
   last obs. used      2015-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52475  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Nov-30 15:54:07  

Additional Information
 Earth MOID = .930469 au 
 Jupiter MOID = 2.29814 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
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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