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85284 (1994 PT21)
Classification: Main-belt Asteroid          SPK-ID: 2085284
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 .1686487689669956 5.0033e-08  
a 2.23984293726102 9.6712e-09 au
q 1.862096183212529 1.143e-07 au
i 1.167034147776167 4.0448e-06 deg
node 70.88935425141257 0.00024182 deg
peri 252.5241714813743 0.00024208 deg
M 139.6608669757998 1.149e-05 deg
tp 2458125.496282689430
(2018-Jan-06.99628269)
3.787e-05 TDB
period 1224.404100695122
3.35
7.9301e-06
2.171e-08
d
yr
n .2940205768631613 1.9043e-09 deg/d
Q 2.61758969130951 1.1302e-08 au
  Orbit Determination Parameters
   # obs. used (total)      575  
   data-arc span      8915 days (24.41 yr)  
   first obs. used      1994-08-12  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58181  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:20:49  

Additional Information
 Earth MOID = .849298 au 
 Jupiter MOID = 2.68659 au 
 T_jup = 3.616 
[ 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 16.4   n/a MPO417412  
diameter diameter 1.827 km 0.643 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.192   0.131 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85284 (1994 PT21)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1994 PT21 = 2000 GC44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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