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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07239884625976868 5.1544e-08  
a 1.942642504455587 9.2147e-09 au
q 1.801997428437815 1.0134e-07 au
i 21.14839619721746 6.0578e-06 deg
node 46.00009932345732 1.3513e-05 deg
peri 106.7518393729364 7.8819e-05 deg
M 122.1137999272823 6.7852e-05 deg
tp 2458865.032847757058
(2020-Jan-16.53284776)
0.00018763 TDB
period 988.9805646812674
2.71
7.0366e-06
1.927e-08
d
yr
n .3640111978500025 2.59e-09 deg/d
Q 2.083287580473359 9.8818e-09 au
  Orbit Determination Parameters
   # obs. used (total)      719  
   data-arc span      7124 days (19.50 yr)  
   first obs. used      2001-01-06  
   last obs. used      2020-07-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45284  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:58:18  

Additional Information
 Earth MOID = .863824 au 
 Jupiter MOID = 2.95554 au 
 T_jup = 3.815 
[ 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 16.30   n/a E2021B55  
rotation period rot_per 3.9 h n/a LCDB (Rev. 2020-October); 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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