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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2401151080669283 4.1757e-08  
a 2.557995694132896 9.6552e-09 au
q 1.943782281601438 1.0876e-07 au
i 5.566687187680428 3.5516e-06 deg
node 21.68706725520734 4.6055e-05 deg
peri 253.754424318782 4.6867e-05 deg
M 180.2778881745087 8.7653e-06 deg
tp 2459746.514300922372
(2022-Jun-16.01430092)		 3.6721e-05 TDB
period 1494.335591787551
4.09		 8.4606e-06
2.316e-08		 d
yr
n .2409097407426142 1.364e-09 deg/d
Q 3.172209106664353 1.1974e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2199  
   data-arc span      10038 days (27.48 yr)  
   first obs. used      1993-04-26  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43165  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:47:00  

Additional Information
 Earth MOID = .936611 au 
 Jupiter MOID = 1.99358 au 
 T_jup = 3.389 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456768.5 (2014-Apr-21.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2406555749162266 4.1725e-08  
q 1.941941646320837 1.0874e-07 au
tp 2456759.619199670851
(2014-Apr-12.11919967)		 3.827e-05 TDB
node 21.70694738189722 4.6036e-05 deg
peri 253.9131742097865 4.6845e-05 deg
i 5.569218095485797 3.5535e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2199  
   data-arc span      10038 days (27.48 yr)  
   first obs. used      1993-04-26  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43165  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:47:00  

Additional Information
 Jupiter MOID = 1.99358 au 
 T_jup = 3.389 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.741000377474008E-15 -4.527245101310489E-15 9.589923650498243E-13 -4.343311605694435E-16 1.916492518173981E-13 -5.662651733951752E-15
q -4.527245101310489E-15 1.182367180805083E-14 -2.544450921286844E-12 1.164833634054346E-15 -5.118203135276194E-13 1.487525802242E-14
tp 9.589923650498243E-13 -2.544450921286844E-12 1.464566801965133E-9 3.339389644387377E-12 3.557715093695411E-10 -5.492029603099986E-12
node -4.343311605694435E-16 1.164833634054346E-15 3.339389644387377E-12 2.119332283020101E-9 -2.108422687272844E-9 -6.035353611756524E-11
peri 1.916492518173981E-13 -5.118203135276194E-13 3.557715093695411E-10 -2.108422687272844E-9 2.194464416305438E-9 5.886459951332388E-11
i -5.662651733951752E-15 1.487525802242E-14 -5.492029603099986E-12 -6.035353611756524E-11 5.886459951332388E-11 1.262742893195758E-11

[ 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 14.3   n/a MPO358759  
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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