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JPL Small-Body Database Browser
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59881 (1999 RZ121)
Classification: Main-belt Asteroid          SPK-ID: 2059881
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07912450653811065 6.2676e-08  
a 3.124973976574204 3.0385e-08 au
q 2.877711952733333 1.9487e-07 au
i 11.04940754322943 6.6429e-06 deg
node 217.1620104487622 3.0328e-05 deg
peri 112.8828397308523 4.743e-05 deg
M 197.7599271137388 3.8472e-05 deg
tp 2459509.834495856489
(2021-Oct-22.33449586)
0.0002206 TDB
period 2017.753152378283
5.52
2.9429e-05
8.057e-08
d
yr
n .1784162743473728 2.6022e-09 deg/d
Q 3.372236000415076 3.2789e-08 au
  Orbit Determination Parameters
   # obs. used (total)      661  
   data-arc span      7613 days (20.84 yr)  
   first obs. used      1998-06-18  
   last obs. used      2019-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5637  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 03:40:54  

Additional Information
 Earth MOID = 1.89033 au 
 Jupiter MOID = 1.93527 au 
 T_jup = 3.182 
[ 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 14.2   n/a MPO257256  
rotation period rot_per 2.179 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

59881 (1999 RZ121)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RZ121 = 1998 MR3 = 2000 WL166 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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