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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 ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08483725588155233 3.4827e-08  
a 3.020325073474408 1.852e-08 au
q 2.764088982370591 1.0726e-07 au
i 11.53377992411675 4.7058e-06 deg
node 69.45651037216098 2.7108e-05 deg
peri 48.48789536239723 5.3658e-05 deg
M 64.61013905837862 4.2813e-05 deg
tp 2459052.405973058228
(2020-Jul-21.90597306)
0.00022846 TDB
period 1917.250937768629
5.25
1.7634e-05
4.828e-08
d
yr
n .1877688480460372 1.727e-09 deg/d
Q 3.276561164578224 2.0091e-08 au
  Orbit Determination Parameters
   # obs. used (total)      882  
   data-arc span      8213 days (22.49 yr)  
   first obs. used      1998-12-11  
   last obs. used      2021-06-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55301  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:27:03  

Additional Information
 Earth MOID = 1.79611 au 
 Jupiter MOID = 1.92608 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 14.54   n/a MPO637177  
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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