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186257 (2001 YR4)
Classification: Main-belt Asteroid          SPK-ID: 2186257
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1654848923326515 7.8283e-08  
a 2.576478461081742 1.7235e-08 au
q 2.150110200352234 2.0934e-07 au
i 23.20745904925106 8.2193e-06 deg
node 205.5685930571531 9.1653e-06 deg
peri 153.4612932420059 1.7856e-05 deg
M 277.2586892455238 1.4616e-05 deg
tp 2459547.682716483837
(2021-Nov-29.18271648)
6.2366e-05 TDB
period 1510.560768188214
4.14
1.5157e-05
4.15e-08
d
yr
n .2383220904325409 2.3913e-09 deg/d
Q 3.00284672181125 2.0087e-08 au
  Orbit Determination Parameters
   # obs. used (total)      736  
   data-arc span      6796 days (18.61 yr)  
   first obs. used      2001-10-16  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52788  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:50:32  

Additional Information
 Earth MOID = 1.16505 au 
 Jupiter MOID = 2.50946 au 
 T_jup = 3.295 
[ 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 15.52   n/a E2021B55  

186257 (2001 YR4)          Discovered 2001-Dec-23 by McClusky, J. V. at Kingsnake
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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