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18615 (1998 DJ5)
Classification: Main-belt Asteroid          SPK-ID: 2018615
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .166027265033358 1.5385e-08  
a 2.569645552886392 9.0608e-09 au
q 2.143014329635533 3.9609e-08 au
i 12.99332064236588 6.3365e-07 deg
node 114.0464715080231 2.5541e-06 deg
peri 187.8004962238959 6.4183e-06 deg
M 48.05959235092188 4.2843e-06 deg
tp 2458999.643522218464
(2020-May-30.14352222)
1.7644e-05 TDB
period 1504.555666501942
4.12
7.9578e-06
2.179e-08
d
yr
n .2392733004269572 1.2656e-09 deg/d
Q 2.996276776137251 1.0565e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2568  
   data-arc span      10800 days (29.57 yr)  
   first obs. used      1991-07-18  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44562  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:33:21  

Additional Information
 Earth MOID = 1.12608 au 
 Jupiter MOID = 2.2353 au 
 T_jup = 3.375 
[ 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 13.27   n/a E2021B10  
diameter diameter 6.839 km 0.174 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.198   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18615 (1998 DJ5)          Discovered 1998-Feb-22 by JPL/GEODSS NEAT at Haleakala
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 DJ5 = 1991 OF1 = 1999 LY1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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