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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .181275791396455 3.9662e-08  
a 2.406312486825458 1.0969e-08 au
q 1.970106286429001 9.4579e-08 au
i 3.048699824441697 4.2233e-06 deg
node 140.6086970964994 8.006e-05 deg
peri 189.4172090273659 8.0851e-05 deg
M 215.0376944167937 1.3688e-05 deg
tp 2459549.508477784928
(2021-Dec-01.00847778)
5.3973e-05 TDB
period 1363.409965145248
3.73
9.3227e-06
2.552e-08
d
yr
n .2640438380261128 1.8055e-09 deg/d
Q 2.842518687221914 1.2958e-08 au
  Orbit Determination Parameters
   # obs. used (total)      759  
   data-arc span      10467 days (28.66 yr)  
   first obs. used      1991-06-06  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56632  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:40:50  

Additional Information
 Earth MOID = .959183 au 
 Jupiter MOID = 2.50581 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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