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541995 (2012 HE8)
Classification: Mars-crossing Asteroid          SPK-ID: 2541995
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3378353926891718 5.7619e-08  
a 1.969147719330635 9.8404e-09 au
q 1.303899926307583 1.1706e-07 au
i 2.043020970187547 3.9414e-06 deg
node 165.0613966341353 0.000234 deg
peri 330.1719419367682 0.00023415 deg
M 101.9844617725091 1.386e-05 deg
tp 2458914.578127408979
(2020-Mar-06.07812741)
3.8702e-05 TDB
period 1009.28977163572
2.76
7.5656e-06
2.071e-08
d
yr
n .3566864642020109 2.6737e-09 deg/d
Q 2.634395512353688 1.3165e-08 au
  Orbit Determination Parameters
   # obs. used (total)      156  
   data-arc span      6840 days (18.73 yr)  
   first obs. used      2001-05-24  
   last obs. used      2020-02-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51324  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 20:25:08  

Additional Information
 Earth MOID = .318385 au 
 Jupiter MOID = 2.4145 au 
 T_jup = 3.800 
[ 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 19.05   n/a E2021B25  

541995 (2012 HE8)          Discovered 2012-Apr-21 by Mount Lemmon Survey at Mount Lemmon
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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