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20429 (1998 YN1)
Classification: Apollo [NEO]          SPK-ID: 2020429
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 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4640220985894962 4.8543e-08  
a 1.556138991374142 6.3412e-09 au
q .8340561108997706 7.5513e-08 au
i 6.298951219479635 5.0434e-06 deg
node 61.76816322590174 3.9419e-05 deg
peri 147.6205780351797 4.2008e-05 deg
M 51.62043291336048 3.1335e-05 deg
tp 2459098.830626908901
(2020-Sep-06.33062691)
6.1124e-05 TDB
period 709.0404370344305
1.94
4.3339e-06
1.187e-08
d
yr
n .5077284470624891 3.1034e-09 deg/d
Q 2.278221871848514 9.2836e-09 au
  Orbit Determination Parameters
   # obs. used (total)      519  
   data-arc span      7711 days (21.11 yr)  
   first obs. used      1998-12-16  
   last obs. used      2020-01-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59524  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:20:26  

Additional Information
 Earth MOID = .056921 au 
 Jupiter MOID = 2.68699 au 
 T_jup = 4.307 
[ 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 17.6   n/a MPO435889  
rotation period rot_per 2.7180 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2001) http://www.asu.cas.cz/~ppravec/neo.htm]

20429 (1998 YN1)          Discovered 1998-Dec-16 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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