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305990 (2009 JR8)
Classification: Main-belt Asteroid          SPK-ID: 2305990
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1322841460905564 3.7442e-08  
a 2.395078818473575 1.7237e-08 au
q 2.078247862152219 9.0389e-08 au
i 10.47303653039179 4.4789e-06 deg
node 96.37859913036489 3.6432e-05 deg
peri 11.65768140150076 4.7598e-05 deg
M 103.7837779687044 3.1056e-05 deg
tp 2458610.194099329254
(2019-May-06.69409933)		 0.00011502 TDB
period 1353.873668810156
3.71		 1.4616e-05
4.002e-08		 d
yr
n .2659036868014311 2.8706e-09 deg/d
Q 2.71190977479493 1.9518e-08 au
   Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      6031 days (16.51 yr)  
   first obs. used      2003-11-18  
   last obs. used      2020-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59276  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 19:09:48  

Additional Information
 Earth MOID = 1.0961 au 
 Jupiter MOID = 2.4208 au 
 T_jup = 3.495 
[ 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 17.0   n/a MPO471212  

305990 (2009 JR8)          Discovered 2009-May-13 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1924-Jul-30 05:35 00:04 Iris 0.0203352775767132 0.0202994856644157 0.020371171997877 6.23911811292304 6.23911806761244 2423996.732968766 4.47453731254543 2896.04786941353 87.8397810154998 -51.9331783551068 27266.4491140299 T 14 CATAB v2.0f-lin.ifort 2020-Nov-11 19:09:49 2020-Nov-11 19:09
2006-Apr-25 23:54 < 00:01 Eunom 0.0490593794854155 0.0490536184797434 0.0490651405122125 7.64281407826132 7.64281404082281 2453851.496103880 0.647371871576518 292.089420703355 86.3545476877613 -10.9961108121184 29506.3278225744 T 14 CATAB v2.0f-lin.ifort 2020-Nov-11 19:09:49 2020-Nov-11 19:09
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