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118269 (1998 HL74)
Classification: Main-belt Asteroid          SPK-ID: 2118269
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2395902399792008 5.4711e-08  
a 2.772347989660921 2.0984e-08 au
q 2.108120469512206 1.5929e-07 au
i 7.23663174988544 4.7703e-06 deg
node 194.7212426408741 3.3861e-05 deg
peri 357.0578322497977 3.5121e-05 deg
M 295.4431109584752 1.3993e-05 deg
tp 2459302.850112126240
(2021-Mar-29.35011213)
6.8107e-05 TDB
period 1686.048413755404
4.62
1.9143e-05
5.241e-08
d
yr
n .2135170004983175 2.4242e-09 deg/d
Q 3.436575509809636 2.6012e-08 au
  Orbit Determination Parameters
   # obs. used (total)      660  
   data-arc span      7943 days (21.75 yr)  
   first obs. used      1998-03-06  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54719  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 09:51:59  

Additional Information
 Earth MOID = 1.10809 au 
 Jupiter MOID = 1.52226 au 
 T_jup = 3.283 
[ 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 14.9   n/a MPO453653  

118269 (1998 HL74)          Discovered 1998-Apr-21 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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