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70684 (1999 UD9)
Classification: Main-belt Asteroid          SPK-ID: 2070684
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0670962458559568 3.4479e-08  
a 2.719378100132142 1.3465e-08 au
q 2.536918038550371 9.7085e-08 au
i 7.815717965521533 5.4267e-06 deg
node 45.7878377579303 2.8062e-05 deg
peri 265.3667151538367 4.9914e-05 deg
M 344.5032703440783 4.1817e-05 deg
tp 2459271.008321553791
(2021-Feb-25.50832155)
0.00019033 TDB
period 1637.958222344379
4.48
1.2166e-05
3.331e-08
d
yr
n .2197858254801754 1.6325e-09 deg/d
Q 2.901838161713912 1.4369e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1159  
   data-arc span      7590 days (20.78 yr)  
   first obs. used      1999-10-10  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51371  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:51:09  

Additional Information
 Earth MOID = 1.53585 au 
 Jupiter MOID = 2.26505 au 
 T_jup = 3.343 
[ 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 14.57   n/a E2021B10  
diameter diameter 6.061 km 0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

70684 (1999 UD9)          Discovered 1999-Oct-29 by CSS at Catalina
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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