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70423 (1999 SB18)
Classification: Main-belt Asteroid          SPK-ID: 2070423
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1353931242394311 2.9492e-08  
a 2.360694319400072 8.2539e-09 au
q 2.041072540122219 7.1731e-08 au
i 7.466083043611143 3.6883e-06 deg
node 91.3618070632494 2.6142e-05 deg
peri 229.5571984986329 3.013e-05 deg
M 278.929218992304 1.6743e-05 deg
tp 2459298.845791109657
(2021-Mar-25.34579111)
6.2344e-05 TDB
period 1324.823610485273
3.63
6.9481e-06
1.902e-08
d
yr
n .2717342876068873 1.4251e-09 deg/d
Q 2.680316098677925 9.3714e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1272  
   data-arc span      7638 days (20.91 yr)  
   first obs. used      1999-09-13  
   last obs. used      2020-08-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50889  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:00:44  

Additional Information
 Earth MOID = 1.03678 au 
 Jupiter MOID = 2.59723 au 
 T_jup = 3.528 
[ 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 15.2   n/a MPO319891  
diameter diameter 2.391 km 0.379 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.309   0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

70423 (1999 SB18)          Discovered 1999-Sep-30 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 SB18 = 2001 BM8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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