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JPL Small-Body Database Browser
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85820 (1998 XP9)
Classification: Main-belt Asteroid          SPK-ID: 2085820
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08493373760768635 4.319e-08  
a 3.020270356599472 2.352e-08 au
q 2.763747506627779 1.3183e-07 au
i 11.53536797102968 6.1993e-06 deg
node 69.46847728919062 3.6947e-05 deg
peri 48.92382651923813 6.4194e-05 deg
M 274.774021749787 5.1419e-05 deg
tp 2459054.375406856034
(2020-Jul-23.87540686)
0.00027507 TDB
period 1917.198837993554
5.25
2.2395e-05
6.131e-08
d
yr
n .1877739506543611 2.1934e-09 deg/d
Q 3.276793206571165 2.5517e-08 au
  Orbit Determination Parameters
   # obs. used (total)      608  
   data-arc span      7629 days (20.89 yr)  
   first obs. used      1998-12-11  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61006  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:14:40  

Additional Information
 Earth MOID = 1.7959 au 
 Jupiter MOID = 1.92714 au 
 T_jup = 3.210 
[ 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 14.4   n/a MPO453289  
diameter diameter 3.379 km 0.969 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.323   0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85820 (1998 XP9)          Discovered 1998-Dec-14 by Korlevic, K. at Visnjan
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 XP9 = 2000 EQ28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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