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JPL Small-Body Database Browser
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173214 (1998 SR121)
Classification: Main-belt Asteroid          SPK-ID: 2173214
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .166858795946928 7.5598e-08  
a 2.529698737770065 1.1118e-08 au
q 2.107596252277288 1.9416e-07 au
i 11.36550375278329 7.4133e-06 deg
node 3.010947255366362 1.6851e-05 deg
peri 348.5331305260896 2.1717e-05 deg
M 59.30073293702988 1.1685e-05 deg
tp 2458358.419842455158
(2018-Aug-27.91984246)
4.7488e-05 TDB
period 1469.608424716853
4.02
9.6884e-06
2.653e-08
d
yr
n .2449632119313419 1.6149e-09 deg/d
Q 2.951801223262842 1.2973e-08 au
  Orbit Determination Parameters
   # obs. used (total)      652  
   data-arc span      7682 days (21.03 yr)  
   first obs. used      1998-09-26  
   last obs. used      2019-10-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52497  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 19:45:42  

Additional Information
 Earth MOID = 1.10295 au 
 Jupiter MOID = 2.48394 au 
 T_jup = 3.405 
[ 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 15.9   n/a MPO449897  
diameter diameter 1.759 km 0.300 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.273   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173214 (1998 SR121)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Alternate Designations
 1998 SR121 = 2002 PP50 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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