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192285 (1981 EU12)
Classification: Main-belt Asteroid          SPK-ID: 2192285
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1529458787305879 4.3989e-08  
a 2.569328092663213 1.6018e-08 au
q 2.176359949783652 1.1383e-07 au
i 2.903648557737928 5.0374e-06 deg
node 230.077802440517 7.9228e-05 deg
peri 297.3103682848217 8.0431e-05 deg
M 244.6692809771287 1.5842e-05 deg
tp 2459682.414810902438
(2022-Apr-12.91481090)
6.8488e-05 TDB
period 1504.276860447501
4.12
1.4068e-05
3.852e-08
d
yr
n .239317647878267 2.238e-09 deg/d
Q 2.962296235542774 1.8468e-08 au
  Orbit Determination Parameters
   # obs. used (total)      485  
   data-arc span      14573 days (39.90 yr)  
   first obs. used      1981-02-12  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51625  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:15:28  

Additional Information
 Earth MOID = 1.18454 au 
 Jupiter MOID = 2.02149 au 
 T_jup = 3.412 
[ 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 16.40   n/a MPCxxxxx  
diameter diameter 2.771 km 0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

192285 (1981 EU12)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20081113/Numbers.arcLast Updated: 2008-11-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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