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18212 (4603 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2018212
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .20047852335589 3.1995e-08  
a 3.191030639038805 1.486e-08 au
q 2.551297528540903 1.0097e-07 au
i 3.039048503266038 3.4476e-06 deg
node 81.8932782385935 7.5026e-05 deg
peri 351.4477642774362 7.5622e-05 deg
M 176.2942533537036 1.0914e-05 deg
tp 2458376.898318112944
(2018-Sep-15.39831811)
5.9336e-05 TDB
period 2082.067897828213
5.70
1.4543e-05
3.982e-08
d
yr
n .1729050240751096 1.2077e-09 deg/d
Q 3.830763749536707 1.7839e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1779  
   data-arc span      22182 days (60.73 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-06-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48815  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:35:05  

Additional Information
 Earth MOID = 1.56607 au 
 Jupiter MOID = 1.46199 au 
 T_jup = 3.163 
[ 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 13.42   n/a E2021B10  
rotation period rot_per 6.132 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]

18212 (4603 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 4603 P-L = 1994 PR26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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