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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457357.5 (2015-Dec-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0739923847861295 4.2718e-08  
q 2.521408492621188 1.222e-07 au
tp 2457721.732523457731
(2016-Nov-29.23252346)
0.00020894 TDB
node 60.5274822304233 5.6959e-05 deg
peri 211.9628339136315 7.2493e-05 deg
i 5.711537032503794 5.2693e-06 deg
  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
 Jupiter MOID = 2.13975 au 
 T_jup = 3.347 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.824860997638389E-15 -5.130251923651571E-15 -1.306929125499695E-12 -9.904717090613792E-15 -2.231914507793054E-13 1.289015762482027E-15
q -5.130251923651571E-15 1.493386232843177E-14 3.211989067197981E-12 2.986705279687341E-14 4.99701792612716E-13 -3.206091102839551E-15
tp -1.306929125499695E-12 3.211989067197981E-12 4.365620777351068E-8 -1.100394397795528E-11 9.405326267353423E-9 2.675591124961539E-12
node -9.904717090613792E-15 2.986705279687341E-14 -1.100394397795528E-11 3.244364968538832E-9 -3.230575681098474E-9 -8.605303350803227E-11
peri -2.231914507793054E-13 4.99701792612716E-13 9.405326267353423E-9 -3.230575681098474E-9 5.255285031692921E-9 8.625724177604314E-11
i 1.289015762482027E-15 -3.206091102839551E-15 2.675591124961539E-12 -8.605303350803227E-11 8.625724177604314E-11 2.77660463076591E-11

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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