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118299 (1998 SD148)
Classification: Main-belt Asteroid          SPK-ID: 2118299
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1639142921314249 5.1155e-08  
a 2.387922297032057 1.1228e-08 au
q 1.996507704049201 1.2227e-07 au
i 3.613503855442386 5.949e-06 deg
node 276.4549649852821 7.7247e-05 deg
peri 169.9693992310647 7.8939e-05 deg
M 249.0050800316835 1.7741e-05 deg
tp 2459416.055767836525
(2021-Jul-20.55576784)
6.8096e-05 TDB
period 1347.810120173539
3.69
9.5062e-06
2.603e-08
d
yr
n .2670999383456534 1.8839e-09 deg/d
Q 2.779336890014913 1.3069e-08 au
  Orbit Determination Parameters
   # obs. used (total)      478  
   data-arc span      8950 days (24.50 yr)  
   first obs. used      1995-11-27  
   last obs. used      2020-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58772  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 01:51:32  

Additional Information
 Earth MOID = 1.01294 au 
 Jupiter MOID = 2.42563 au 
 T_jup = 3.513 
[ 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 16.4   n/a MPO436568  
rotation period rot_per 6.625 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

118299 (1998 SD148)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 SD148 = 2002 VG104 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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