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JPL Small-Body Database Browser
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39999 (1998 HL84)
Classification: Main-belt Asteroid          SPK-ID: 2039999
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1328326091039399 3.2467e-08  
a 2.433588182420478 1.0219e-08 au
q 2.110328314665051 7.7553e-08 au
i 6.152714080904407 4.4807e-06 deg
node 179.50223547 2.783e-05 deg
peri 118.782171243148 3.3072e-05 deg
M 226.6338600053145 1.9432e-05 deg
tp 2459514.203044199093
(2021-Oct-26.70304420)
7.665e-05 TDB
period 1386.657032429993
3.80
8.7344e-06
2.391e-08
d
yr
n .259617188375075 1.6353e-09 deg/d
Q 2.756848050175905 1.1577e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1028  
   data-arc span      8921 days (24.42 yr)  
   first obs. used      1995-09-02  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58232  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:40:50  

Additional Information
 Earth MOID = 1.10318 au 
 Jupiter MOID = 2.45264 au 
 T_jup = 3.486 
[ 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 15.5   n/a MPO502432  

39999 (1998 HL84)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HL84 = 1995 SD38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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