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JPL Small-Body Database Browser
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173261 (1999 RQ156)
Classification: Main-belt Asteroid          SPK-ID: 2173261
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2465482651607074 6.7294e-08  
a 2.339567584896154 1.264e-08 au
q 1.762751255613781 1.5298e-07 au
i 5.241548320242877 6.7733e-06 deg
node 331.4588492846115 5.4381e-05 deg
peri 354.6401595076126 5.5355e-05 deg
M 186.0320157075402 1.4398e-05 deg
tp 2459232.138583377362
(2021-Jan-17.63858338)
5.5894e-05 TDB
period 1307.078948696573
3.58
1.0593e-05
2.9e-08
d
yr
n .2754233019811038 2.2321e-09 deg/d
Q 2.916383914178527 1.5757e-08 au
  Orbit Determination Parameters
   # obs. used (total)      430  
   data-arc span      7147 days (19.57 yr)  
   first obs. used      1999-07-16  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54523  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:32:22  

Additional Information
 Earth MOID = .750269 au 
 Jupiter MOID = 2.42935 au 
 T_jup = 3.518 
[ 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 16.5   n/a MPO226976  
diameter diameter 2.818 km 0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.056   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

173261 (1999 RQ156)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Alternate Designations
 1999 RQ156 = 2003 WE123 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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