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24045 Unruh (1999 ST18)
Classification: Main-belt Asteroid          SPK-ID: 2024045
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1499929694956177 4.0686e-08  
a 2.637607186218987 1.5131e-08 au
q 2.241984651995021 1.1256e-07 au
i 6.221617764717173 4.0524e-06 deg
node 89.92478401280987 3.8447e-05 deg
peri 316.5013734490508 4.1454e-05 deg
M 310.8870300283829 1.805e-05 deg
tp 2459413.955475588721
(2021-Jul-18.45547559)
7.9576e-05 TDB
period 1564.637024727854
4.28
1.3463e-05
3.686e-08
d
yr
n .2300853132774464 1.9798e-09 deg/d
Q 3.033229720442954 1.74e-08 au
  Orbit Determination Parameters
   # obs. used (total)      793  
   data-arc span      15266 days (41.80 yr)  
   first obs. used      1978-11-29  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56007  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:35:12  

Additional Information
 Earth MOID = 1.25597 au 
 Jupiter MOID = 2.3455 au 
 T_jup = 3.372 
[ 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 15.19   n/a MPCxxxxx  

24045 Unruh           Discovered 1999 Sept. 30 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Amy Unruh mentored a finalist in the 2007 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition. She teaches at the St. Nicholas Catholic School, Gig Harbor, Washington.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071026/MPCPages.arcLast Updated: 2007-10-28

[ show close-approach data ]
Alternate Designations
 1999 ST18 = 1978 WG12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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