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JPL Small-Body Database Browser
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74801 (1999 SN18)
Classification: Main-belt Asteroid          SPK-ID: 2074801
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2109306910603292 4.1749e-08  
a 2.227233008484974 8.0069e-09 au
q 1.757441210852862 9.3404e-08 au
i 7.423245103538118 4.8248e-06 deg
node 59.46811068427158 3.4206e-05 deg
peri 264.8036777233806 3.6655e-05 deg
M 343.257106028909 1.297e-05 deg
tp 2458656.964428218025
(2019-Jun-22.46442822)
4.3667e-05 TDB
period 1214.078891832371
3.32
6.5469e-06
1.792e-08
d
yr
n .2965210930046427 1.599e-09 deg/d
Q 2.697024806117085 9.6957e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1054  
   data-arc span      9010 days (24.67 yr)  
   first obs. used      1995-03-28  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4948  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 06:49:33  

Additional Information
 Earth MOID = .763866 au 
 Jupiter MOID = 2.6578 au 
 T_jup = 3.605 
[ 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 MPO439563  

74801 (1999 SN18)          Discovered 1999-Sep-30 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 SN18 = 1995 FW16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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