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31396 (1998 YQ12)
Classification: Main-belt Asteroid          SPK-ID: 2031396
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1020316650911739 3.0112e-08  
a 2.301470610903289 8.1869e-09 au
q 2.066647732314425 6.9671e-08 au
i 8.270167411646341 3.3988e-06 deg
node 102.5794206959287 2.7689e-05 deg
peri 166.9438144634658 3.482e-05 deg
M 262.2152835509451 2.2475e-05 deg
tp 2459346.897745699913
(2021-May-12.39774570)
8.0055e-05 TDB
period 1275.283019478185
3.49
6.8048e-06
1.863e-08
d
yr
n .2822902794920797 1.5063e-09 deg/d
Q 2.536293489492153 9.0223e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1803  
   data-arc span      14395 days (39.41 yr)  
   first obs. used      1980-11-29  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49957  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 07:15:18  

Additional Information
 Earth MOID = 1.05127 au 
 Jupiter MOID = 2.54489 au 
 T_jup = 3.570 
[ 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 14.5   n/a MPO358921  
diameter diameter 2.966 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.349   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

31396 (1998 YQ12)          Discovered 1998-Dec-29 by Kobayashi, T. at Oizumi
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 YQ12 = 1980 WF4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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