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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1433643363092183 2.8971e-08  
a 2.574474915145802 9.4132e-09 au
q 2.205387027591193 7.4401e-08 au
i 7.294130790645983 3.5018e-06 deg
node 220.3178858993622 2.6463e-05 deg
peri 9.571871234778557 2.9688e-05 deg
M 185.5398332280779 1.509e-05 deg
tp 2459931.681519663781
(2022-Dec-18.18151966)		 6.5405e-05 TDB
period 1508.79912560834
4.13		 8.2751e-06
2.266e-08		 d
yr
n .2386003503646317 1.3086e-09 deg/d
Q 2.943562802700411 1.0763e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1518  
   data-arc span      14602 days (39.98 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49407  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:09:33  

Additional Information
 Earth MOID = 1.19442 au 
 Jupiter MOID = 2.04369 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 14.74   n/a E2021B10  
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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