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312434 (2008 HG18)
Classification: Main-belt Asteroid          SPK-ID: 2312434
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07275747576395711 6.2688e-08  
a 3.199325868481544 4.6666e-08 au
q 2.966550994144497 2.1365e-07 au
i 11.71145541383218 6.1757e-06 deg
node 176.3251078914057 3.0056e-05 deg
peri 33.25545249252308 5.2433e-05 deg
M 49.77377660127402 4.1615e-05 deg
tp 2458711.509053991905
(2019-Aug-16.00905399)
0.00024032 TDB
period 2090.191817195793
5.72
4.5732e-05
1.252e-07
d
yr
n .1722329965309007 3.7684e-09 deg/d
Q 3.432100742818591 5.0062e-08 au
  Orbit Determination Parameters
   # obs. used (total)      213  
   data-arc span      6286 days (17.21 yr)  
   first obs. used      2002-03-12  
   last obs. used      2019-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6761  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:01:54  

Additional Information
 Earth MOID = 1.97094 au 
 Jupiter MOID = 1.54074 au 
 T_jup = 3.158 
[ 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 15.8   n/a MPO413277  
diameter diameter 4.749 km 1.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.034   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

312434 (2008 HG18)          Discovered 2008-Apr-26 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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