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20543 (1999 RZ98)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020543
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03382110171204061 4.2398e-08  
a 3.220339756471899 2.4149e-08 au
q 3.111424318020934 1.4774e-07 au
i 21.82423414652385 5.4542e-06 deg
node 20.81950699289804 1.0156e-05 deg
peri 294.4651274703365 8.758e-05 deg
M 297.4400397013124 8.9419e-05 deg
tp 2459567.313179165157
(2021-Dec-18.81317917)
0.00052528 TDB
period 2110.818866715728
5.78
2.3744e-05
6.501e-08
d
yr
n .1705499252809562 1.9184e-09 deg/d
Q 3.329255194922863 2.4966e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1685  
   data-arc span      13759 days (37.67 yr)  
   first obs. used      1982-11-11  
   last obs. used      2020-07-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45413  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:35  

Additional Information
 Earth MOID = 2.149 au 
 Jupiter MOID = 1.78577 au 
 T_jup = 3.076 
[ 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 12.70   n/a E2021B10  
diameter diameter 18.073 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.506 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.]
geometric albedo albedo 0.050   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20543 (1999 RZ98)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 RZ98 = 1982 VR9 = 1991 GL6 = 1993 SQ15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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