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173744 (2001 RP21)
Classification: Main-belt Asteroid          SPK-ID: 2173744
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1992247361200956 5.8116e-08  
a 2.693566226292796 2.0514e-08 au
q 2.156941205637612 1.5101e-07 au
i 7.984924825920632 6.4023e-06 deg
node 156.8907191238539 4.8353e-05 deg
peri 137.7853018276 5.252e-05 deg
M 26.745557991422 2.4224e-05 deg
tp 2458480.539276603688
(2018-Dec-28.03927660)
0.00010813 TDB
period 1614.692818767257
4.42
1.8446e-05
5.05e-08
d
yr
n .222952623443785 2.5469e-09 deg/d
Q 3.23019124694798 2.46e-08 au
  Orbit Determination Parameters
   # obs. used (total)      268  
   data-arc span      9006 days (24.66 yr)  
   first obs. used      1995-03-01  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61666  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 19:48:20  

Additional Information
 Earth MOID = 1.14829 au 
 Jupiter MOID = 2.0308 au 
 T_jup = 3.328 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO449899  
diameter diameter 3.319 km 0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173744 (2001 RP21)          Discovered 2001-Sep-07 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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