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JPL Small-Body Database Browser
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245143 (2004 RR257)
Classification: Outer Main-belt Asteroid          SPK-ID: 2245143
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05310200487498754 5.5225e-08  
a 3.253531468425983 3.6232e-08 au
q 3.080762424528701 1.8704e-07 au
i 7.649859298051267 6.0241e-06 deg
node 355.8685670783842 3.623e-05 deg
peri 350.4463168361708 5.9657e-05 deg
M 264.5416353054432 4.9479e-05 deg
tp 2459568.884771705065
(2021-Dec-20.38477171)
0.00029884 TDB
period 2143.536802338402
5.87
3.5807e-05
9.803e-08
d
yr
n .167946731592046 2.8055e-09 deg/d
Q 3.426300512323265 3.8156e-08 au
  Orbit Determination Parameters
   # obs. used (total)      502  
   data-arc span      7517 days (20.58 yr)  
   first obs. used      1998-09-25  
   last obs. used      2019-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58219  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 19:07:17  

Additional Information
 Earth MOID = 2.07412 au 
 Jupiter MOID = 1.87303 au 
 T_jup = 3.164 
[ 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 14.6   n/a MPO437142  
diameter diameter 4.239 km 0.915 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.156   0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

245143 (2004 RR257)          Discovered 2004-Sep-09 by LONEOS at Anderson Mesa
Reference: 20100726/Numbers.arcLast Updated: 2010-07-28

[ show close-approach data ]
Alternate Designations
 2004 RR257 = 1998 ST89 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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