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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03009216523879842 5.2995e-08  
a 3.000048314510937 3.268e-08 au
q 2.909770364906295 1.6572e-07 au
i 11.00692963118045 6.1515e-06 deg
node 45.12172134397823 2.8621e-05 deg
peri 107.107245814552 0.00011102 deg
M 284.0553703964787 0.00010841 deg
tp 2459000.891978115688
(2020-May-31.39197812)
0.00057399 TDB
period 1897.97636612562
5.20
3.1012e-05
8.491e-08
d
yr
n .189675702197955 3.0992e-09 deg/d
Q 3.090326264115579 3.3663e-08 au
  Orbit Determination Parameters
   # obs. used (total)      493  
   data-arc span      7301 days (19.99 yr)  
   first obs. used      1998-12-18  
   last obs. used      2018-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5871  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:53:20  

Additional Information
 Earth MOID = 1.93733 au 
 Jupiter MOID = 1.91193 au 
 T_jup = 3.224 
[ 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 14.8   n/a MPO417415  
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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