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20409 (1998 QP43)
Classification: Main-belt Asteroid          SPK-ID: 2020409
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09404656088588441 1.9658e-08  
a 3.154260365635829 2.0809e-08 au
q 2.857613026109127 7.1338e-08 au
i 16.9938789338591 1.3265e-06 deg
node 355.9892546009071 2.6957e-06 deg
peri 120.3763110958463 1.2666e-05 deg
M 223.2563977828959 1.5677e-05 deg
tp 2459977.729454785194
(2023-Feb-02.22945479)
9.2514e-05 TDB
period 2046.184239599268
5.60
2.0249e-05
5.544e-08
d
yr
n .1759372362629984 1.741e-09 deg/d
Q 3.450907705162531 2.2766e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1581  
   data-arc span      9896 days (27.09 yr)  
   first obs. used      1993-10-13  
   last obs. used      2020-11-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47174  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:19:49  

Additional Information
 Earth MOID = 1.91201 au 
 Jupiter MOID = 1.65104 au 
 T_jup = 3.132 
[ 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 12.89   n/a E2021B10  
diameter diameter 14.134 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 655.222 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.]
geometric albedo albedo 0.080   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20409 (1998 QP43)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 QP43 = 1993 TF22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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