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134495 (1998 YT21)
Classification: Main-belt Asteroid          SPK-ID: 2134495
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1528795278579464 4.2296e-08  
a 2.715771942108141 1.1825e-08 au
q 2.30058600982879 1.1736e-07 au
i 7.392315121007431 4.669e-06 deg
node 294.6960247749851 3.1057e-05 deg
peri 143.413627803522 3.5739e-05 deg
M 354.6889415287731 1.5411e-05 deg
tp 2459224.616648550965
(2021-Jan-10.11664855)
6.9989e-05 TDB
period 1634.7011665156
4.48
1.0677e-05
2.923e-08
d
yr
n .2202237371417233 1.4384e-09 deg/d
Q 3.130957874387491 1.3633e-08 au
  Orbit Determination Parameters
   # obs. used (total)      830  
   data-arc span      8099 days (22.17 yr)  
   first obs. used      1998-12-11  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51589  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:08:38  

Additional Information
 Earth MOID = 1.32075 au 
 Jupiter MOID = 2.11218 au 
 T_jup = 3.332 
[ 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 15.54   n/a E2021B55  
diameter diameter 4.670 km 0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.061   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

134495 (1998 YT21)          Discovered 1998-Dec-26 by Spacewatch at Kitt Peak
Reference: 20060907/Numbers.arcLast Updated: 2006-09-10

[ show close-approach data ]
Alternate Designations
 1998 YT21 = 2001 NM3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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