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541999 (2012 HC12)
Classification: Main-belt Asteroid          SPK-ID: 2541999
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1712077669995685 7.0573e-08  
a 3.02717747652131 4.543e-08 au
q 2.508901180454708 2.0534e-07 au
i 15.24530834324131 8.1469e-06 deg
node 134.5506333002614 2.438e-05 deg
peri 141.978306964325 3.2265e-05 deg
M 180.7038357188142 2.0926e-05 deg
tp 2460158.628480706720
(2023-Aug-02.12848071)
0.0001211 TDB
period 1923.779320306483
5.27
4.3306e-05
1.186e-07
d
yr
n .1871316508083928 4.2125e-09 deg/d
Q 3.545453772587912 5.3208e-08 au
  Orbit Determination Parameters
   # obs. used (total)      100  
   data-arc span      5134 days (14.06 yr)  
   first obs. used      2005-11-07  
   last obs. used      2019-11-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58571  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 20:25:08  

Additional Information
 Earth MOID = 1.50892 au 
 Jupiter MOID = 1.76051 au 
 T_jup = 3.169 
[ 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 16.5   .28183 MPO535746 autocmod 2.8

541999 (2012 HC12)          Discovered 2005-Nov-07 by Mauna Kea at Mauna Kea
Reference: Last Updated: 2019-12-13

[ show close-approach data ]
Alternate Designations
 2012 HC12 = 2013 QK78 = 2017 FE59 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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