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18921 (2000 PT7)
Classification: Main-belt Asteroid          SPK-ID: 2018921
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09126924389553676 2.1985e-08  
a 2.999879238954831 1.5947e-08 au
q 2.726082529037506 7.0628e-08 au
i 11.67068439021819 8.9895e-07 deg
node 123.3933514607853 1.4433e-06 deg
peri 281.5145234750421 1.1496e-05 deg
M 294.1760673729842 1.3334e-05 deg
tp 2459547.504742427866
(2021-Nov-29.00474243)
7.1026e-05 TDB
period 1897.815920265461
5.20
1.5133e-05
4.143e-08
d
yr
n .1896917378317936 1.5126e-09 deg/d
Q 3.273675948872156 1.7403e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2091  
   data-arc span      10530 days (28.83 yr)  
   first obs. used      1992-02-23  
   last obs. used      2020-12-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4757  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:42:33  

Additional Information
 Earth MOID = 1.7654 au 
 Jupiter MOID = 2.07319 au 
 T_jup = 3.216 
[ 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 13.09   n/a E2021B10  
diameter diameter 8.559 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.183   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18921 (2000 PT7)          Discovered 2000-Aug-02 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2000 PT7 = 1998 HW112 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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