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21008 (1988 PE)
Classification: Main-belt Asteroid          SPK-ID: 2021008
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2635156276995622 1.9595e-08  
a 2.314319488549784 8.5867e-09 au
q 1.704460135827258 4.3454e-08 au
i 9.190062162317171 3.0494e-07 deg
node 338.1477482577748 2.5155e-06 deg
peri 321.70739985 3.1551e-06 deg
M 76.12932286237076 2.7009e-06 deg
tp 2458928.553883187065
(2020-Mar-20.05388319)
8.981e-06 TDB
period 1285.977575679279
3.52
7.1569e-06
1.959e-08
d
yr
n .2799426730359904 1.558e-09 deg/d
Q 2.924178841272309 1.0849e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1869  
   data-arc span      11874 days (32.51 yr)  
   first obs. used      1988-08-09  
   last obs. used      2021-02-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45647  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:50:36  

Additional Information
 Earth MOID = .698344 au 
 Jupiter MOID = 2.35965 au 
 T_jup = 3.519 
[ 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 14.34   n/a E2021B10  
rotation period rot_per 2.807 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.]

21008 (1988 PE)          Discovered 1988-Aug-09 by Helin, E. F. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1988 PE = 1998 FS101 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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