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18443 (1994 PW8)
Classification: Main-belt Asteroid          SPK-ID: 2018443
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04353708606449257 4.0472e-08  
a 2.975189892964959 1.6346e-08 au
q 2.845658794536735 1.2906e-07 au
i 8.650506553351807 4.6724e-06 deg
node 331.9665093660053 2.3203e-05 deg
peri 113.915177747244 6.1448e-05 deg
M 298.0113407784704 5.6278e-05 deg
tp 2459523.260369539524
(2021-Nov-04.76036954)
0.00029322 TDB
period 1874.435332098177
5.13
1.5448e-05
4.229e-08
d
yr
n .192057839411845 1.5828e-09 deg/d
Q 3.104720991393183 1.7058e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1434  
   data-arc span      9682 days (26.51 yr)  
   first obs. used      1994-08-10  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46775  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:29:25  

Additional Information
 Earth MOID = 1.87551 au 
 Jupiter MOID = 1.98757 au 
 T_jup = 3.243 
[ 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 14.09   n/a E2021B10  
diameter diameter 4.847 km 0.336 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.998 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.227   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18443 (1994 PW8)          Discovered 1994-Aug-10 by Elst, E. W. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1994 PW8 = 2000 RC76 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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