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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2746950900180019 6.0487e-08  
a 2.802058604187275 1.3454e-08 au
q 2.032346863674335 1.7162e-07 au
i 17.08405411192691 7.0775e-06 deg
node 334.2610760957043 1.5782e-05 deg
peri 12.4316968399505 1.9238e-05 deg
M 267.3543548959686 1.101e-05 deg
tp 2459041.396607443851
(2020-Jul-10.89660744)
5.4412e-05 TDB
period 1713.22438849184
4.69
1.2339e-05
3.378e-08
d
yr
n .2101300929511691 1.5134e-09 deg/d
Q 3.571770344700214 1.7149e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1340  
   data-arc span      11579 days (31.70 yr)  
   first obs. used      1987-08-25  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49373  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:26:01  

Additional Information
 Earth MOID = 1.02654 au 
 Jupiter MOID = 1.85811 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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