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30157 Robertspira (2000 GL55)
Classification: Main-belt Asteroid          SPK-ID: 2030157
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1894931643671367 5.0096e-08  
a 2.459011627995899 7.8045e-09 au
q 1.993045733391371 1.2571e-07 au
i 2.780330344888478 5.0793e-06 deg
node 164.1540148316031 6.39e-05 deg
peri 162.4845182975047 6.4905e-05 deg
M 29.2716999328746 8.6574e-06 deg
tp 2459085.979102160937
(2020-Aug-24.47910216)
3.4081e-05 TDB
period 1408.443080402059
3.86
6.7052e-06
1.836e-08
d
yr
n .255601383548445 1.2168e-09 deg/d
Q 2.924977522600426 9.2834e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1075  
   data-arc span      10102 days (27.66 yr)  
   first obs. used      1993-06-12  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52882  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:32:03  

Additional Information
 Earth MOID = .979713 au 
 Jupiter MOID = 2.41671 au 
 T_jup = 3.464 
[ 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 15.75   n/a E2021B10  

30157 Robertspira           Discovered 2000 Apr. 5 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Robert Spira mentored a finalist in the 2004 Intel Science Talent Search (STS), a science competition for high school seniors. He teaches at the Ward Melville High School, East Setauket, New York.
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 2014-04-15Last Updated: 2014-04-17

[ show close-approach data ]
Alternate Designations
 2000 GL55 = 1999 AN27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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