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JPL Small-Body Database Browser
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201556 (2003 RZ18)
Classification: Main-belt Asteroid          SPK-ID: 2201556
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1848542894552621 5.2478e-08  
a 2.712139574529735 2.3348e-08 au
q 2.210788940576544 1.4466e-07 au
i 2.934555049583948 7.1529e-06 deg
node 166.0024660538601 0.00010237 deg
peri 242.8284825790172 0.0001043 deg
M 140.6953858758803 2.3962e-05 deg
tp 2457962.906567838789
(2017-Jul-28.40656784)
0.00010317 TDB
period 1631.422623770532
4.47
2.1066e-05
5.768e-08
d
yr
n .2206663036019267 2.8495e-09 deg/d
Q 3.213490208482925 2.7664e-08 au
  Orbit Determination Parameters
   # obs. used (total)      393  
   data-arc span      7078 days (19.38 yr)  
   first obs. used      1999-12-08  
   last obs. used      2019-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54028  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 12:13:49  

Additional Information
 Earth MOID = 1.22227 au 
 Jupiter MOID = 2.17324 au 
 T_jup = 3.336 
[ 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 15.8   n/a MPO385881  
rotation period rot_per 6.81 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

201556 (2003 RZ18)          Discovered 2003-Sep-15 by LONEOS at Anderson Mesa
Reference: 20081212/Numbers.arcLast Updated: 2008-12-12

Alternate Designations
 2003 RZ18 = 1999 XR155 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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