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13340 (1998 SM123)
Classification: Main-belt Asteroid          SPK-ID: 2013340
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2400276508836724 4.1356e-08  
a 2.558083275478379 9.493e-09 au
q 1.944072556100493 1.0796e-07 au
i 5.566653191727685 3.4387e-06 deg
node 21.67625915823125 4.6038e-05 deg
peri 253.790101273356 4.6798e-05 deg
M 228.4159989446596 8.7534e-06 deg
tp 2459746.724318370227
(2022-Jun-16.22431837)
3.6666e-05 TDB
period 1494.412337641112
4.09
8.3186e-06
2.278e-08
d
yr
n .240897368773233 1.3409e-09 deg/d
Q 3.172093994856264 1.1772e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2261  
   data-arc span      10132 days (27.74 yr)  
   first obs. used      1993-04-26  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43117  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:11:25  

Additional Information
 Earth MOID = .935094 au 
 Jupiter MOID = 1.99296 au 
 T_jup = 3.389 
[ 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 14.33   n/a E2021B10  
diameter diameter 8.914 km 0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.65818 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.046   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13340 (1998 SM123)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20000124/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 SM123 = 1993 HF6 = 1997 EG58 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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