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120279 (2004 HG18)
Classification: Inner Main-belt Asteroid          SPK-ID: 2120279
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07245547230994735 5.3171e-08  
a 1.942341572568469 9.5679e-09 au
q 1.801608296540775 1.0506e-07 au
i 21.15076808656572 6.0871e-06 deg
node 46.00522795467135 1.4184e-05 deg
peri 106.6119331225861 8.0716e-05 deg
M 49.43306329257749 6.9196e-05 deg
tp 2458864.730612616137
(2020-Jan-16.23061262)
0.00019059 TDB
period 988.7507712986462
2.71
7.3058e-06
2e-08
d
yr
n .3640957968883993 2.6903e-09 deg/d
Q 2.083074848596163 1.0261e-08 au
  Orbit Determination Parameters
   # obs. used (total)      660  
   data-arc span      7053 days (19.31 yr)  
   first obs. used      2001-01-06  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45891  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:35:59  

Additional Information
 Earth MOID = .864553 au 
 Jupiter MOID = 2.95719 au 
 T_jup = 3.816 
[ 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 16.2   n/a MPO396030  
rotation period rot_per 3.9 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Clark, M. (2014) Minor Planet Bull. 41, 178-183.]

120279 (2004 HG18)          Discovered 2004-Apr-17 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

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