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39981 (1998 HT14)
Classification: Main-belt Asteroid          SPK-ID: 2039981
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1809422551520504 3.967e-08  
a 2.406924722503131 1.107e-08 au
q 1.971410335232192 9.4593e-08 au
i 3.048159526814256 4.2226e-06 deg
node 140.609769096521 8.2609e-05 deg
peri 189.4064370348636 8.3408e-05 deg
M 109.4646559723737 1.3397e-05 deg
tp 2458185.771764255257
(2018-Mar-08.27176426)
4.9436e-05 TDB
period 1363.930334790324
3.73
9.4092e-06
2.576e-08
d
yr
n .263943099451148 1.8208e-09 deg/d
Q 2.84243910977407 1.3073e-08 au
  Orbit Determination Parameters
   # obs. used (total)      743  
   data-arc span      10095 days (27.64 yr)  
   first obs. used      1991-06-06  
   last obs. used      2019-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5705  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:09:23  

Additional Information
 Earth MOID = .959583 au 
 Jupiter MOID = 2.50285 au 
 T_jup = 3.498 
[ 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 15.9   n/a MPO468241  
diameter diameter 3.954 km 0.167 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.045   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39981 (1998 HT14)          Discovered 1998-Apr-17 by Spacewatch at Kitt Peak
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HT14 = 1991 LC6 = 1999 RV87 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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