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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .137517079756459 3.319e-08  
a 2.293495658809163 9.4649e-09 au
q 1.978100833375611 7.5433e-08 au
i 4.060490027735791 4.1869e-06 deg
node 116.7756947919657 6.2607e-05 deg
peri 143.0640362676694 6.523e-05 deg
M 257.7974074157682 1.984e-05 deg
tp 2459756.667666798979
(2022-Jun-26.16766680)
7.1022e-05 TDB
period 1268.660185315465
3.47
7.8534e-06
2.15e-08
d
yr
n .2837639299845156 1.7566e-09 deg/d
Q 2.608890484242715 1.0767e-08 au
  Orbit Determination Parameters
   # obs. used (total)      655  
   data-arc span      10757 days (29.45 yr)  
   first obs. used      1991-08-05  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55143  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:38:13  

Additional Information
 Earth MOID = .964493 au 
 Jupiter MOID = 2.44493 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 16.28   n/a MPCxxxxx  
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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