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30421 Jameschafer (2000 LM2)
Classification: Main-belt Asteroid          SPK-ID: 2030421
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1178765446744844 3.2485e-08  
a 2.796345872276112 1.2178e-08 au
q 2.466722283137447 8.9122e-08 au
i 9.713863562979672 3.2534e-06 deg
node 149.3775093378649 2.133e-05 deg
peri 116.1894826631598 2.6181e-05 deg
M 135.1790765699324 1.51e-05 deg
tp 2458559.154972202661
(2019-Mar-16.65497220)
7.0653e-05 TDB
period 1707.987773445089
4.68
1.1158e-05
3.055e-08
d
yr
n .2107743425316585 1.3769e-09 deg/d
Q 3.125969461414778 1.3614e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1427  
   data-arc span      8932 days (24.45 yr)  
   first obs. used      1996-08-19  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4861  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:34:51  

Additional Information
 Earth MOID = 1.46773 au 
 Jupiter MOID = 2.03305 au 
 T_jup = 3.296 
[ 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 14.42   n/a E2021B10  
diameter diameter 4.087 km 0.562 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.221   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30421 Jameschafer           Discovered 2000 June 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
James R. Schafer mentored a finalist in the 2015 Intel Science Talent Search (STS), a science competition for high school seniors. He teaches at the Montgomery Blair High School, Silver Spring, Maryland.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2015-07-02Last Updated: 2015-07-06

[ show close-approach data ]
Alternate Designations
 2000 LM2 = 1977 TL = 1999 EK11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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