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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0295896994685395 4.6031e-08  
a 2.998752033996434 2.2624e-08 au
q 2.910019862529808 1.412e-07 au
i 11.00690604146138 4.3246e-06 deg
node 45.10446377993372 2.6098e-05 deg
peri 106.7975843158475 9.1488e-05 deg
M 38.18584485559484 8.5313e-05 deg
tp 2458999.308715600766
(2020-May-29.80871560)
0.0004497 TDB
period 1896.746363937322
5.19
2.1465e-05
5.877e-08
d
yr
n .1897987031079376 2.1479e-09 deg/d
Q 3.087484205463059 2.3294e-08 au
  Orbit Determination Parameters
   # obs. used (total)      704  
   data-arc span      8130 days (22.26 yr)  
   first obs. used      1998-12-18  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5253  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:07:33  

Additional Information
 Earth MOID = 1.9367 au 
 Jupiter MOID = 1.91237 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 14.93   n/a E2021B10  
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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