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212693 (2007 HD18)
Classification: Main-belt Asteroid          SPK-ID: 2212693
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07432599741387326 4.2519e-08  
a 2.721087882629659 2.4695e-08 au
q 2.518840311702406 1.2187e-07 au
i 5.71260563703247 5.2614e-06 deg
node 60.50278003262448 5.6929e-05 deg
peri 213.096731920195 7.2434e-05 deg
M 323.4598333476546 4.5638e-05 deg
tp 2459366.910337880478
(2021-Jun-01.41033788)
0.00020788 TDB
period 1639.50324055588
4.49
2.2319e-05
6.111e-08
d
yr
n .2195787059731218 2.9891e-09 deg/d
Q 2.923335453556913 2.653e-08 au
  Orbit Determination Parameters
   # obs. used (total)      440  
   data-arc span      8979 days (24.58 yr)  
   first obs. used      1995-10-21  
   last obs. used      2020-05-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55492  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:39:40  

Additional Information
 Earth MOID = 1.50317 au 
 Jupiter MOID = 2.13922 au 
 T_jup = 3.347 
[ 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 16.04   n/a E2021B55  
diameter diameter 5.066 km 0.244 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.033   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

212693 (2007 HD18)          Discovered 2007-Apr-16 by CSS at Catalina
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

[ show close-approach data ]
Alternate Designations
 2007 HD18 = 2005 YZ286 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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