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JPL Small-Body Database Browser
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20239 (1998 DT12)
Classification: Main-belt Asteroid          SPK-ID: 2020239
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1695169519737658 4.2402e-08  
a 2.326426097115499 9.4006e-09 au
q 1.932057436140255 9.885e-08 au
i 3.410538751079375 4.7424e-06 deg
node 333.9758870522548 7.1015e-05 deg
peri 1.869801611893425 7.2155e-05 deg
M 150.8287992004886 1.3699e-05 deg
tp 2458057.482168518447
(2017-Oct-30.98216852)
4.8053e-05 TDB
period 1296.081520038555
3.55
7.8558e-06
2.151e-08
d
yr
n .2777603063033342 1.6836e-09 deg/d
Q 2.720794758090742 1.0994e-08 au
  Orbit Determination Parameters
   # obs. used (total)      863  
   data-arc span      8179 days (22.39 yr)  
   first obs. used      1996-09-17  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51618  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:38:25  

Additional Information
 Earth MOID = .921458 au 
 Jupiter MOID = 2.64108 au 
 T_jup = 3.552 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO467940  
diameter diameter 1.760 km 0.443 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.360   0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20239 (1998 DT12)          Discovered 1998-Feb-24 by Spacewatch at Kitt Peak
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 DT12 = 1978 NP5 = 1996 TO49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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