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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1326389252372611 3.2445e-08  
a 2.43395290681438 1.0446e-08 au
q 2.111116009176413 7.7586e-08 au
i 6.152055523769581 5.2205e-06 deg
node 179.5160701015638 2.8948e-05 deg
peri 118.6849224857332 3.567e-05 deg
M 122.908494540932 2.0918e-05 deg
tp 2458126.971544578301
(2018-Jan-08.47154458)
7.95e-05 TDB
period 1386.968773708642
3.80
8.9286e-06
2.445e-08
d
yr
n .2595588356595723 1.6709e-09 deg/d
Q 2.756789804452347 1.1831e-08 au
  Orbit Determination Parameters
   # obs. used (total)      957  
   data-arc span      8852 days (24.24 yr)  
   first obs. used      1995-09-02  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59371  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 02:34:09  

Additional Information
 Earth MOID = 1.10323 au 
 Jupiter MOID = 2.4512 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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