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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1325102201755161 4.3498e-08  
a 2.395479967741123 1.9884e-08 au
q 2.078054389789709 1.0941e-07 au
i 10.47305352696236 5.0899e-06 deg
node 96.37824017622853 4.0045e-05 deg
peri 11.6938556313234 5.307e-05 deg
M 357.3836635619627 3.3519e-05 deg
tp 2458610.341886016154
(2019-May-06.84188602)		 0.0001261 TDB
period 1354.213821397294
3.71		 1.6861e-05
4.616e-08		 d
yr
n .2658368968857131 3.3099e-09 deg/d
Q 2.712905545692538 2.2519e-08 au
   Orbit Determination Parameters
   # obs. used (total)      209  
   data-arc span      5547 days (15.19 yr)  
   first obs. used      2003-11-18  
   last obs. used      2019-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62685  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:14:25  

Additional Information
 Earth MOID = 1.09611 au 
 Jupiter MOID = 2.42105 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 16.9   n/a MPO413265  

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 12 CATAB v2.0e-lin.ifort 2019-Jul-14 12:14:27 2019-Jul-14 12:14
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 12 CATAB v2.0e-lin.ifort 2019-Jul-14 12:14:27 2019-Jul-14 12:14
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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