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136805 (1997 EM30)
Classification: Main-belt Asteroid          SPK-ID: 2136805
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .141646953347585 4.1267e-08  
a 2.471767563021625 1.5642e-08 au
q 2.121649218336227 1.0513e-07 au
i 1.205303733232314 5.4003e-06 deg
node 175.6572587650107 0.00026165 deg
peri 130.2747420138266 0.00026288 deg
M 238.4648278852237 3.0214e-05 deg
tp 2459479.691768857100
(2021-Sep-22.19176886)
0.00012194 TDB
period 1419.416567128736
3.89
1.3474e-05
3.689e-08
d
yr
n .2536253333496207 2.4075e-09 deg/d
Q 2.821885907707023 1.7858e-08 au
  Orbit Determination Parameters
   # obs. used (total)      325  
   data-arc span      8354 days (22.87 yr)  
   first obs. used      1997-03-13  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57036  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 07:42:33  

Additional Information
 Earth MOID = 1.10688 au 
 Jupiter MOID = 2.40043 au 
 T_jup = 3.469 
[ 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 17.1   n/a MPO412866  
diameter diameter 1.825 km 0.591 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.766 h n/a LCDB (Rev. 2019-August); 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:
[Masiero, J.; Jedicke, R.; Durecy, J.; Gwyn, S.; et al. (2009) Icarus 204, 145-171.]
geometric albedo albedo 0.070   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

136805 (1997 EM30)          Discovered 1997-Mar-13 by Spacewatch at Kitt Peak
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Alternate Designations
 1997 EM30 = 2002 RT146 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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