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186976 (2004 RX221)
Classification: Main-belt Asteroid          SPK-ID: 2186976
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2243829890297162 6.5745e-08  
a 2.884582398743774 2.3109e-08 au
q 2.237331178011137 1.8641e-07 au
i 10.18703902446818 7.6031e-06 deg
node 236.0523670616727 2.7372e-05 deg
peri 21.37715825416864 2.9777e-05 deg
M 187.0929034848689 1.3555e-05 deg
tp 2460059.974840378615
(2023-Apr-25.47484038)
7.3749e-05 TDB
period 1789.463525629354
4.90
2.1504e-05
5.887e-08
d
yr
n .2011776126442075 2.4175e-09 deg/d
Q 3.531833619476411 2.8295e-08 au
  Orbit Determination Parameters
   # obs. used (total)      344  
   data-arc span      22018 days (60.28 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59753  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:53:29  

Additional Information
 Earth MOID = 1.22444 au 
 Jupiter MOID = 1.53566 au 
 T_jup = 3.232 
[ 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 15.50   n/a MPCxxxxx  

186976 (2004 RX221)          Discovered 2004-Sep-13 by LINEAR at Socorro
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 2004 RX221 = 1998 HP17 = 2003 HV47 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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