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85840 (1998 YR4)
Classification: Main-belt Asteroid          SPK-ID: 2085840
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02978624474702399 5.28e-08  
a 2.99942966351977 2.4192e-08 au
q 2.910087917460686 1.6523e-07 au
i 11.00606827633035 4.3803e-06 deg
node 45.11066678363068 2.7997e-05 deg
peri 107.0061620205269 9.1612e-05 deg
M .02240014438976852 8.4974e-05 deg
tp 2459000.381939459492
(2020-May-30.88193946)
0.00044786 TDB
period 1897.389313367617
5.19
2.2955e-05
6.285e-08
d
yr
n .189734387910643 2.2954e-09 deg/d
Q 3.088771409578854 2.4912e-08 au
  Orbit Determination Parameters
   # obs. used (total)      675  
   data-arc span      7793 days (21.34 yr)  
   first obs. used      1998-12-18  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52755  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:40:34  

Additional Information
 Earth MOID = 1.93718 au 
 Jupiter MOID = 1.91217 au 
 T_jup = 3.225 
[ 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 14.9   n/a MPO502667  
diameter diameter 5.132 km 0.336 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.117   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85840 (1998 YR4)          Discovered 1998-Dec-18 by Klet at Klet
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 YR4 = 2000 GW89 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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