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19112 (1981 EN31)
Classification: Main-belt Asteroid          SPK-ID: 2019112
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1123792991109287 2.8169e-08  
a 2.308034581909256 7.2012e-09 au
q 2.048659273270508 6.7133e-08 au
i 4.212820068422395 3.045e-06 deg
node 160.0096570409035 4.5976e-05 deg
peri 171.4438371818633 4.8464e-05 deg
M 337.9728793853383 1.5219e-05 deg
tp 2459278.864095193573
(2021-Mar-05.36409519)
5.4201e-05 TDB
period 1280.74271545544
3.51
5.994e-06
1.641e-08
d
yr
n .2810869003240684 1.3155e-09 deg/d
Q 2.567409890548003 8.0105e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1666  
   data-arc span      14406 days (39.44 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-07-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51633  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:46:03  

Additional Information
 Earth MOID = 1.03619 au 
 Jupiter MOID = 2.73463 au 
 T_jup = 3.574 
[ 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 15.43   n/a E2021B10  
diameter diameter 4.462 km 0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.080   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19112 (1981 EN31)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EN31 = 1999 LQ11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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