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JPL Small-Body Database Browser
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39990 (1998 HT36)
Classification: Main-belt Asteroid          SPK-ID: 2039990
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05973930325069598 4.1734e-08  
a 2.44811273991384 1.2357e-08 au
q 2.301864190552235 1.0474e-07 au
i 8.883314446554406 5.2913e-06 deg
node 26.63619979153817 2.994e-05 deg
peri 242.2162424619117 5.372e-05 deg
M 218.6223647675085 4.5183e-05 deg
tp 2459549.944411128371
(2021-Dec-01.44441113)
0.00017586 TDB
period 1399.089662809375
3.83
1.0593e-05
2.9e-08
d
yr
n .2573101707270993 1.9481e-09 deg/d
Q 2.594361289275445 1.3095e-08 au
  Orbit Determination Parameters
   # obs. used (total)      799  
   data-arc span      7985 days (21.86 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57067  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:40:50  

Additional Information
 Earth MOID = 1.30197 au 
 Jupiter MOID = 2.44719 au 
 T_jup = 3.478 
[ 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 15.2   n/a MPO309463  

39990 (1998 HT36)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HT36 = 1999 SQ18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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