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118315 (1998 WR12)
Classification: Main-belt Asteroid          SPK-ID: 2118315
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 .1373781615456749 5.0613e-08  
a 2.288538127651411 1.0818e-08 au
q 1.974142967047479 1.1831e-07 au
i 6.030927181528328 4.1994e-06 deg
node 254.9936632894023 5.4058e-05 deg
peri 122.9207367861951 5.708e-05 deg
M 164.5425508825324 1.9013e-05 deg
tp 2458622.521903515456
(2019-May-19.02190352)
6.5213e-05 TDB
period 1264.548979084318
3.46
8.9666e-06
2.455e-08
d
yr
n .28468648186382 2.0186e-09 deg/d
Q 2.602933288255343 1.2304e-08 au
  Orbit Determination Parameters
   # obs. used (total)      555  
   data-arc span      7794 days (21.34 yr)  
   first obs. used      1998-11-21  
   last obs. used      2020-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60993  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:56:41  

Additional Information
 Earth MOID = .982893 au 
 Jupiter MOID = 2.8722 au 
 T_jup = 3.580 
[ 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 16.36   n/a E2021B55  

118315 (1998 WR12)          Discovered 1998-Nov-21 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 WR12 = 2001 QP221 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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