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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1655758400486946 7.7239e-08  
a 2.577453318524341 1.711e-08 au
q 2.150689320123378 2.0715e-07 au
i 23.20622579752972 7.6929e-06 deg
node 205.5485502131553 9.158e-06 deg
peri 153.3548922249913 1.753e-05 deg
M 324.0772613005404 1.4135e-05 deg
tp 2459547.317444551826
(2021-Nov-28.81744455)
5.9774e-05 TDB
period 1511.418171451222
4.14
1.505e-05
4.12e-08
d
yr
n .2381868941368741 2.3718e-09 deg/d
Q 3.004217316925304 1.9944e-08 au
  Orbit Determination Parameters
   # obs. used (total)      779  
   data-arc span      7195 days (19.70 yr)  
   first obs. used      2001-10-16  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52041  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 02:45:15  

Additional Information
 Earth MOID = 1.16636 au 
 Jupiter MOID = 2.50944 au 
 T_jup = 3.295 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457618.5 (2016-Aug-18.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1647673240763338 7.7402e-08  
q 2.152133628364103 2.0732e-07 au
tp 2458038.108829357868
(2017-Oct-11.60882936)
5.719e-05 TDB
node 205.5837864751792 9.1577e-06 deg
peri 153.6863066857478 1.7507e-05 deg
i 23.20719467410643 7.6929e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      779  
   data-arc span      7195 days (19.70 yr)  
   first obs. used      2001-10-16  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52041  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 02:45:15  

Additional Information
 Jupiter MOID = 2.50944 au 
 T_jup = 3.295 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.991029510163149E-15 -1.601985696002734E-14 1.758176513052657E-12 -2.32962008371215E-14 6.822286344389142E-13 -3.192681491948946E-14
q -1.601985696002734E-14 4.298233100340827E-14 -4.486814528793963E-12 6.255927650190352E-14 -1.789219817886278E-12 8.614041259357544E-14
tp 1.758176513052657E-12 -4.486814528793963E-12 3.270674535712307E-9 -9.060888514449956E-12 8.356190005565452E-10 -1.110838052764643E-11
node -2.32962008371215E-14 6.255927650190352E-14 -9.060888514449956E-12 8.386350739874719E-11 -7.963218651268623E-11 5.860380907561135E-12
peri 6.822286344389142E-13 -1.789219817886278E-12 8.356190005565452E-10 -7.963218651268623E-11 3.064854356614009E-10 -9.194956410791054E-12
i -3.192681491948946E-14 8.614041259357544E-14 -1.110838052764643E-11 5.860380907561135E-12 -9.194956410791054E-12 5.918135902051458E-11

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

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