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85838 (1998 YU2)
Classification: Main-belt Asteroid          SPK-ID: 2085838
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08004284704999141 3.7426e-08  
a 2.371820346717884 1.2249e-08 au
q 2.181973093475487 8.7283e-08 au
i 5.872675510735035 4.8282e-06 deg
node 324.5601135251127 4.22e-05 deg
peri 279.8130182720642 5.4552e-05 deg
M 204.1420096804906 3.7437e-05 deg
tp 2459578.127263865560
(2021-Dec-29.62726387)
0.00014045 TDB
period 1334.200540923902
3.65
1.0336e-05
2.83e-08
d
yr
n .2698245046061131 2.0903e-09 deg/d
Q 2.561667599960281 1.323e-08 au
  Orbit Determination Parameters
   # obs. used (total)      933  
   data-arc span      7712 days (21.11 yr)  
   first obs. used      1998-12-17  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53998  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:39:37  

Additional Information
 Earth MOID = 1.17797 au 
 Jupiter MOID = 2.47295 au 
 T_jup = 3.533 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456828.5 (2014-Jun-20.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07999412344924244 3.7311e-08  
q 2.181624615711265 8.6964e-08 au
tp 2456911.603885610168
(2014-Sep-11.10388561)
0.00013412 TDB
node 324.6297082761001 4.2183e-05 deg
peri 280.1816769255849 5.4619e-05 deg
i 5.874246151527866 4.8302e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      933  
   data-arc span      7712 days (21.11 yr)  
   first obs. used      1998-12-17  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53998  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:39:37  

Additional Information
 Jupiter MOID = 2.47295 au 
 T_jup = 3.533 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.392108011635268E-15 -3.218481578446653E-15 -5.926796321995213E-13 6.641836512021395E-16 -1.836264223755584E-13 1.354288895449871E-15
q -3.218481578446653E-15 7.562684560859518E-15 1.780976336468968E-12 -2.292507322750754E-16 5.25070737628193E-13 -2.995519038695217E-15
tp -5.926796321995213E-13 1.780976336468968E-12 1.798696582768301E-8 1.817017876315363E-11 4.670586344955152E-9 -1.633250235080693E-12
node 6.641836512021395E-16 -2.292507322750754E-16 1.817017876315363E-11 1.779370406674122E-9 -1.764775145031918E-9 5.785343476168E-11
peri -1.836264223755584E-13 5.25070737628193E-13 4.670586344955152E-9 -1.764775145031918E-9 2.983266184602795E-9 -5.802178025439913E-11
i 1.354288895449871E-15 -2.995519038695217E-15 -1.633250235080693E-12 5.785343476168E-11 -5.802178025439913E-11 2.333040479040171E-11

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 15.4   n/a MPO449533  
diameter diameter 1.887 km 0.476 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.413   0.226 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85838 (1998 YU2)          Discovered 1998-Dec-17 by ODAS at Caussols
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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