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90800 (1994 UD9)
Classification: Main-belt Asteroid          SPK-ID: 2090800
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1027665764075059 5.5411e-08  
a 2.260756433059612 1.0802e-08 au
q 2.028426234342831 1.2344e-07 au
i 3.33816972141903 5.5888e-06 deg
node 332.1311588347507 8.1773e-05 deg
peri 244.9185651953403 8.5729e-05 deg
M 4.446237163449668 2.3632e-05 deg
tp 2458985.165514350052
(2020-May-15.66551435)
8.1547e-05 TDB
period 1241.59252667892
3.40
8.8987e-06
2.436e-08
d
yr
n .2899501988490119 2.0781e-09 deg/d
Q 2.493086631776393 1.1912e-08 au
  Orbit Determination Parameters
   # obs. used (total)      423  
   data-arc span      9313 days (25.50 yr)  
   first obs. used      1994-10-28  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55565  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:35:08  

Additional Information
 Earth MOID = 1.02398 au 
 Jupiter MOID = 2.48452 au 
 T_jup = 3.611 
[ 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 16.6   n/a MPO468892  
diameter diameter 1.628 km 0.251 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.167   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

90800 (1994 UD9)          Discovered 1994-Oct-28 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1994 UD9 = 2003 GJ23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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