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66584 (1999 RM161)
Classification: Main-belt Asteroid          SPK-ID: 2066584
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1178798943213897 4.3323e-08  
a 2.60661939025913 1.2e-08 au
q 2.299351371999298 1.1744e-07 au
i 13.98837540811044 7.0468e-06 deg
node 327.269758757221 1.3826e-05 deg
peri 74.44817858373978 3.4928e-05 deg
M 331.3610251751288 3.0878e-05 deg
tp 2459322.784053440296
(2021-Apr-18.28405344)
0.00013203 TDB
period 1537.145079658233
4.21
1.0614e-05
2.906e-08
d
yr
n .2342004048700738 1.6172e-09 deg/d
Q 2.913887408518961 1.3414e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1182  
   data-arc span      8797 days (24.08 yr)  
   first obs. used      1997-01-09  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50318  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:23:31  

Additional Information
 Earth MOID = 1.3489 au 
 Jupiter MOID = 2.50598 au 
 T_jup = 3.360 
[ 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 14.74   n/a E2021B10  
diameter diameter 3.588 km 1.229 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.06 h n/a LCDB (Rev. 2020-October); 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:
[Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Byun, Y.-I.; et al. (2014) Astron. J. 147, A56.]
geometric albedo albedo 0.137   0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

66584 (1999 RM161)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RM161 = 1997 EZ25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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