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295891 (2008 WD74)
Classification: Main-belt Asteroid          SPK-ID: 2295891
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0276849092416718 4.7958e-08  
a 2.235486291986319 1.9934e-08 au
q 2.173597056881676 1.0499e-07 au
i 6.523049031958385 4.8269e-06 deg
node 261.7808172912829 5.6507e-05 deg
peri 144.7590773827046 0.00013391 deg
M 202.3305610841831 0.0001233 deg
tp 2459535.189265117009
(2021-Nov-16.68926512)
0.00042003 TDB
period 1220.833515776616
3.34
1.6329e-05
4.471e-08
d
yr
n .2948805020076723 3.9441e-09 deg/d
Q 2.297375527090961 2.0485e-08 au
  Orbit Determination Parameters
   # obs. used (total)      188  
   data-arc span      6266 days (17.16 yr)  
   first obs. used      2001-11-12  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65986  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:04:30  

Additional Information
 Earth MOID = 1.18743 au 
 Jupiter MOID = 2.80285 au 
 T_jup = 3.630 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456867.5 (2014-Jul-29.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0272631650232104 4.7789e-08  
q 2.174580494467238 1.0449e-07 au
tp 2457093.653623316137
(2015-Mar-12.15362332)
0.0004198 TDB
node 261.8517227652773 5.6512e-05 deg
peri 144.7042581285237 0.00013587 deg
i 6.522453571619224 4.8274e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      188  
   data-arc span      6266 days (17.16 yr)  
   first obs. used      2001-11-12  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65986  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:04:30  

Additional Information
 Jupiter MOID = 2.80285 au 
 T_jup = 3.630 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.283810352155805E-15 -4.909047182519968E-15 -4.803201299004345E-12 -1.840172919865986E-14 -1.471661663364047E-12 7.539936055894595E-16
q -4.909047182519968E-15 1.091831837045265E-14 1.230795735216945E-11 4.737078529962872E-14 3.722063371329731E-12 -1.082890601066745E-15
tp -4.803201299004345E-12 1.230795735216945E-11 1.762336593703862E-7 2.37529620693945E-10 5.190871411916196E-8 -2.451847397520978E-11
node -1.840172919865986E-14 4.737078529962872E-14 2.37529620693945E-10 3.193628526330692E-9 -3.102566821114996E-9 3.554381130450514E-11
peri -1.471661663364047E-12 3.722063371329731E-12 5.190871411916196E-8 -3.102566821114996E-9 1.845984514471874E-8 -4.262477816214265E-11
i 7.539936055894595E-16 -1.082890601066745E-15 -2.451847397520978E-11 3.554381130450514E-11 -4.262477816214265E-11 2.330365512104079E-11

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 MPO413252  

295891 (2008 WD74)          Discovered 2008-Nov-19 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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