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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1019780346927023 3.3099e-08  
a 2.301777153811944 9.0325e-09 au
q 2.06704644336564 7.5157e-08 au
i 8.269864864820999 3.5202e-06 deg
node 102.57965853 3.3487e-05 deg
peri 166.805339281106 4.1374e-05 deg
M 149.4738448145597 2.4597e-05 deg
tp 2458070.890161191710
(2017-Nov-13.39016119)
8.7244e-05 TDB
period 1275.53781872354
3.49
7.5081e-06
2.056e-08
d
yr
n .2822338896703668 1.6613e-09 deg/d
Q 2.536507864258248 9.9536e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1528  
   data-arc span      14215 days (38.92 yr)  
   first obs. used      1980-11-29  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52319  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 05:21:38  

Additional Information
 Earth MOID = 1.05121 au 
 Jupiter MOID = 2.54412 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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