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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0272606460153926 4.3458e-08  
a 2.236208666344441 1.7612e-08 au
q 2.175248173474672 9.868e-08 au
i 6.520630330640834 4.7933e-06 deg
node 261.7723095371682 4.7626e-05 deg
peri 144.5024578426177 0.00012395 deg
M 261.5285538924334 0.00011868 deg
tp 2459534.598658073455
(2021-Nov-16.09865807)
0.00040466 TDB
period 1221.425313233027
3.34
1.4429e-05
3.95e-08
d
yr
n .2947376283262914 3.4819e-09 deg/d
Q 2.29716915921421 1.8092e-08 au
  Orbit Determination Parameters
   # obs. used (total)      208  
   data-arc span      6852 days (18.76 yr)  
   first obs. used      2001-11-12  
   last obs. used      2020-08-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .63113  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 05:16:19  

Additional Information
 Earth MOID = 1.18816 au 
 Jupiter MOID = 2.80053 au 
 T_jup = 3.629 
[ 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 17.20   n/a E2021B55  

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

[ 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
2062-Sep-30 01:22 00:01 Iris 0.0315315710074858 0.0315170764237786 0.0315460744540146 3.8409161185213 3.84091607105421 2474462.556952446 1.25259557006143 1111.45298554513 119.186025678794 -49.8452617704273 30354.1326718956 T 14 CATAB v2.0f-lin.ifort 2021-Apr-14 05:16:19 2021-Apr-14 05:16
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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