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JPL Small-Body Database Browser
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19935 (1981 EG12)
Classification: Main-belt Asteroid          SPK-ID: 2019935
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1435651786202851 2.9898e-08  
a 2.574048076263071 9.7011e-09 au
q 2.204504404417162 7.6361e-08 au
i 7.29497491208431 3.6273e-06 deg
node 220.3172087759925 3.2956e-05 deg
peri 9.576760515106727 3.6789e-05 deg
M 137.8010825778185 1.6899e-05 deg
tp 2458423.104311410966
(2018-Oct-31.60431141)		 6.9812e-05 TDB
period 1508.423910782187
4.13		 8.5275e-06
2.335e-08		 d
yr
n .2386597013125598 1.3492e-09 deg/d
Q 2.943591748108981 1.1094e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1268  
   data-arc span      14143 days (38.72 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51351  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:58:34  

Additional Information
 Earth MOID = 1.19479 au 
 Jupiter MOID = 2.04482 au 
 T_jup = 3.402 
[ 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 14.7   n/a MPO347678  
diameter diameter 3.093 km 0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.173   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19935 (1981 EG12)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EG12 = 1995 WV22 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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