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JPL Small-Body Database Browser
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160554 (1998 QJ87)
Classification: Main-belt Asteroid          SPK-ID: 2160554
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1808735634790726 4.4918e-08  
a 2.746133360696789 1.9618e-08 au
q 2.249430433958799 1.2945e-07 au
i 11.18415712391057 5.1466e-06 deg
node 304.9136181850672 2.2814e-05 deg
peri 57.75255758936515 2.655e-05 deg
M 270.5052790202369 1.4614e-05 deg
tp 2459413.714716722554
(2021-Jul-18.21471672)
7.0034e-05 TDB
period 1662.19075708116
4.55
1.7812e-05
4.877e-08
d
yr
n .2165816399028516 2.3209e-09 deg/d
Q 3.242836287434778 2.3167e-08 au
  Orbit Determination Parameters
   # obs. used (total)      649  
   data-arc span      7538 days (20.64 yr)  
   first obs. used      1998-08-19  
   last obs. used      2019-04-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56171  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:34:12  

Additional Information
 Earth MOID = 1.26803 au 
 Jupiter MOID = 2.28827 au 
 T_jup = 3.297 
[ 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 14.9   n/a MPO436809  
diameter diameter 5.790 km 0.258 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.043   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

160554 (1998 QJ87)          Discovered 1998-Aug-24 by LINEAR at Socorro
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

Alternate Designations
 1998 QJ87 = 1998 QR96 = 2000 CK121 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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