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541945 (2012 ER2)
Classification: Main-belt Asteroid          SPK-ID: 2541945
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .13263595205292 8.4269e-08  
a 2.666216704267462 2.2489e-08 au
q 2.312580513317549 2.1824e-07 au
i 12.28295821172148 7.414e-06 deg
node 159.74699266 3.16e-05 deg
peri 38.06520577575353 4.2939e-05 deg
M 337.3387307564471 2.5565e-05 deg
tp 2459300.597521567262
(2021-Mar-27.09752157)
0.00011309 TDB
period 1590.162818195464
4.35
2.0119e-05
5.508e-08
d
yr
n .2263919114952848 2.8644e-09 deg/d
Q 3.019852895217376 2.5472e-08 au
  Orbit Determination Parameters
   # obs. used (total)      113  
   data-arc span      8112 days (22.21 yr)  
   first obs. used      1999-02-14  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53711  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 13:25:50  

Additional Information
 Earth MOID = 1.32501 au 
 Jupiter MOID = 1.96475 au 
 T_jup = 3.338 
[ 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 17.19   n/a MPCxxxxx  

541945 (2012 ER2)          Discovered 2012-Jan-19 by Pan-STARRS 1 at Haleakala
Reference: Last Updated: 2019-12-13

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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