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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07429895700555297 4.2588e-08  
a 2.721396493759989 2.4842e-08 au
q 2.519199572675053 1.22e-07 au
i 5.712398273358638 5.2707e-06 deg
node 60.50464904604736 5.6953e-05 deg
peri 212.9823794508017 7.2456e-05 deg
M 279.6506874356585 4.5626e-05 deg
tp 2459366.487137846958
(2021-May-31.98713785)
0.00020788 TDB
period 1639.78216390338
4.49
2.2453e-05
6.147e-08
d
yr
n .2195413561171116 3.0061e-09 deg/d
Q 2.923593414844925 2.6688e-08 au
  Orbit Determination Parameters
   # obs. used (total)      436  
   data-arc span      8946 days (24.49 yr)  
   first obs. used      1995-10-21  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55622  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 08:49:28  

Additional Information
 Earth MOID = 1.50533 au 
 Jupiter MOID = 2.13975 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 15.9   n/a MPO433390  
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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