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26818 (1987 QM)
Classification: Main-belt Asteroid          SPK-ID: 2026818
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2740882645218265 5.234e-08  
a 2.802025396078528 1.3673e-08 au
q 2.034023118121281 1.4906e-07 au
i 17.08921082165127 6.2323e-06 deg
node 334.1993821727539 1.5403e-05 deg
peri 12.39477208410804 1.83e-05 deg
M 351.4265894358489 1.1073e-05 deg
tp 2459041.299763778601
(2020-Jul-10.79976378)
5.2893e-05 TDB
period 1713.193932612107
4.69
1.254e-05
3.433e-08
d
yr
n .2101338284867189 1.5381e-09 deg/d
Q 3.570027674035776 1.7421e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1795  
   data-arc span      11643 days (31.88 yr)  
   first obs. used      1987-08-25  
   last obs. used      2019-07-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44355  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 00:52:05  

Additional Information
 Earth MOID = 1.02909 au 
 Jupiter MOID = 1.86298 au 
 T_jup = 3.206 
[ 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 13.0   n/a MPO395264  
diameter diameter 7.674 km 0.279 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.228   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

26818 (1987 QM)          Discovered 1987-Aug-25 by Singer-Brewster, S. at Palomar
Reference: 20010804/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1987 QM = 1987 SX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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