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90027 (2002 UM18)
Classification: Main-belt Asteroid          SPK-ID: 2090027
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 .1378059073428072 3.4281e-08  
a 2.293011875950414 9.6124e-09 au
q 1.977021293837235 7.7888e-08 au
i 4.060526105947313 4.4531e-06 deg
node 116.7763071562144 7.0741e-05 deg
peri 143.0176845317745 7.3788e-05 deg
M 145.4797878441888 2.1383e-05 deg
tp 2458487.983276338373
(2019-Jan-04.48327634)
7.4284e-05 TDB
period 1268.25879561905
3.47
7.9749e-06
2.183e-08
d
yr
n .2838537380884321 1.7849e-09 deg/d
Q 2.609002458063594 1.0937e-08 au
  Orbit Determination Parameters
   # obs. used (total)      602  
   data-arc span      10283 days (28.15 yr)  
   first obs. used      1991-08-05  
   last obs. used      2019-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56106  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:38:09  

Additional Information
 Earth MOID = .963391 au 
 Jupiter MOID = 2.44704 au 
 T_jup = 3.581 
[ 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 16.3   n/a MPO337931  
diameter diameter 4.221 km 0.369 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.043   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

90027 (2002 UM18)          Discovered 2002-Oct-30 by NEAT at Palomar
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 2002 UM18 = 1991 PP27 = 2004 BP71 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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