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JPL Small-Body Database Browser
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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1020316694244908 3.0513e-08  
a 2.301470612044592 8.2911e-09 au
q 2.066647723366278 7.041e-08 au
i 8.270167214272911 3.4392e-06 deg
node 102.5794233744476 2.8364e-05 deg
peri 166.9438089101879 3.5549e-05 deg
M 262.2152857443206 2.2686e-05 deg
tp 2459346.897738187653
(2021-May-12.39773819)
8.0763e-05 TDB
period 1275.283020426807
3.49
6.8913e-06
1.887e-08
d
yr
n .2822902792820973 1.5254e-09 deg/d
Q 2.536293500722907 9.137e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1699  
   data-arc span      14312 days (39.18 yr)  
   first obs. used      1980-11-29  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50447  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:22:27  

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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