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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1034906304096205 5.5141e-08  
a 2.261347927099598 1.0295e-08 au
q 2.027319604548572 1.2282e-07 au
i 3.338586998612512 4.9242e-06 deg
node 332.1219731480438 7.9276e-05 deg
peri 244.9955859928305 8.2652e-05 deg
M 119.1054013277652 2.1014e-05 deg
tp 2458985.559955288856
(2020-May-16.05995529)
7.3653e-05 TDB
period 1242.0798254892
3.40
8.4817e-06
2.322e-08
d
yr
n .2898364441739579 1.9792e-09 deg/d
Q 2.495376249650624 1.136e-08 au
  Orbit Determination Parameters
   # obs. used (total)      484  
   data-arc span      9782 days (26.78 yr)  
   first obs. used      1994-10-28  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53798  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:01:09  

Additional Information
 Earth MOID = 1.02343 au 
 Jupiter MOID = 2.48018 au 
 T_jup = 3.610 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.70   n/a E2021B10  
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

Alternate Designations
 1994 UD9 = 2003 GJ23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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