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541994 (2012 HJ4)
Classification: Main-belt Asteroid          SPK-ID: 2541994
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1519570191679639 6.3086e-08  
a 2.945072425355273 4.7213e-08 au
q 2.49754799836452 1.6962e-07 au
i 10.76083857868648 8.7175e-06 deg
node 62.86937186633332 3.5781e-05 deg
peri 218.5476329441636 4.5828e-05 deg
M 194.9973488749825 3.0635e-05 deg
tp 2460046.617772545178
(2023-Apr-12.11777255)
0.00016233 TDB
period 1846.045478902495
5.05
4.4392e-05
1.215e-07
d
yr
n .1950114469628484 4.6894e-09 deg/d
Q 3.392596852346026 5.4388e-08 au
  Orbit Determination Parameters
   # obs. used (total)      97  
   data-arc span      10081 days (27.60 yr)  
   first obs. used      1992-04-27  
   last obs. used      2019-12-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59081  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 20:25:08  

Additional Information
 Earth MOID = 1.48969 au 
 Jupiter MOID = 1.75795 au 
 T_jup = 3.228 
[ 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 16.79   .23539 MPCxxxxx autocmod 2.8

541994 (2012 HJ4)          Discovered 2007-Apr-24 by Mount Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2019-12-13

[ show close-approach data ]
Alternate Designations
 2012 HJ4 = 2017 HA44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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