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20555 Jennings (1999 RC115)
Classification: Main-belt Asteroid          SPK-ID: 2020555
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1158476332573768 2.5695e-08  
a 2.392443664288463 8.2234e-09 au
q 2.115284728079039 6.0653e-08 au
i 8.723861427639074 3.8154e-06 deg
node 144.8281338863808 2.5268e-05 deg
peri 309.0993218917876 3.2812e-05 deg
M 164.1814380861383 2.097e-05 deg
tp 2458584.071710204964
(2019-Apr-10.57171021)
7.7918e-05 TDB
period 1351.639910778372
3.70
6.9689e-06
1.908e-08
d
yr
n .2663431266931782 1.3732e-09 deg/d
Q 2.669602600497888 9.1761e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1564  
   data-arc span      13138 days (35.97 yr)  
   first obs. used      1984-08-02  
   last obs. used      2020-07-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51666  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:46  

Additional Information
 Earth MOID = 1.14367 au 
 Jupiter MOID = 2.47797 au 
 T_jup = 3.506 
[ 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 14.8   n/a MPO467945  
rotation period rot_per 2.854 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

20555 Jennings           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Barbara Jennings mentored a finalist in the 2004 Discovery Channel Youth Science Challenge (DCYSC), a middle school science competition. She teaches at the Bonaire Middle School, Bonaire, Georgia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RC115 = 1990 DY2 = 1998 HZ125 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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