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186876 (2004 HR61)
Classification: Main-belt Asteroid          SPK-ID: 2186876
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1425162093350606 6.2735e-08  
a 2.559445905305353 2.1021e-08 au
q 2.194683376883091 1.6738e-07 au
i 13.890199525923 7.1506e-06 deg
node 54.91399639238041 2.6014e-05 deg
peri 241.2623816005142 4.7489e-05 deg
M 329.8492848058373 4.9193e-05 deg
tp 2459325.760020081775
(2021-Apr-21.26002008)
0.00020533 TDB
period 1495.606553245845
4.09
1.8426e-05
5.045e-08
d
yr
n .2407050164488173 2.9655e-09 deg/d
Q 2.924208433727614 2.4017e-08 au
  Orbit Determination Parameters
   # obs. used (total)      333  
   data-arc span      6791 days (18.59 yr)  
   first obs. used      2001-10-17  
   last obs. used      2020-05-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .591  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:53:04  

Additional Information
 Earth MOID = 1.21351 au 
 Jupiter MOID = 2.29181 au 
 T_jup = 3.381 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.17   n/a E2021B55  

186876 (2004 HR61)          Discovered 2004-Apr-29 by NEAT at Haleakala
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

Alternate Designations
 2004 HR61 = 2001 WA74 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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