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181825 (1998 SR39)
Classification: Main-belt Asteroid          SPK-ID: 2181825
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3433133765468827 2.9203e-08  
a 3.117727165799904 2.0156e-08 au
q 2.047369725357196 8.8999e-08 au
i 13.34872281284396 6.7707e-06 deg
node 190.7558533140742 1.5419e-05 deg
peri 87.40764976206978 1.8939e-05 deg
M 64.74273575617475 1.059e-05 deg
tp 2458838.886917780798
(2019-Dec-21.38691778)
5.862e-05 TDB
period 2010.738472485646
5.51
1.9499e-05
5.339e-08
d
yr
n .1790386989288434 1.7362e-09 deg/d
Q 4.188084606242612 2.7075e-08 au
  Orbit Determination Parameters
   # obs. used (total)      639  
   data-arc span      8109 days (22.20 yr)  
   first obs. used      1998-09-23  
   last obs. used      2020-12-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48895  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:11  

Additional Information
 Earth MOID = 1.08227 au 
 Jupiter MOID = 1.38741 au 
 T_jup = 3.084 
[ 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 15.28   n/a MPCxxxxx  
diameter diameter 5.360 km 1.390 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.061   0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

181825 (1998 SR39)          Discovered 1998-Sep-23 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1998 SR39 = 2003 MG12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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