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13538 (1991 ST)
Classification: Main-belt Asteroid          SPK-ID: 2013538
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2203741414963981 3.6981e-08  
a 2.200635883538895 6.0335e-09 au
q 1.715672639957843 8.1755e-08 au
i 6.849863071715363 3.3517e-06 deg
node 79.51615549597705 3.0227e-05 deg
peri 229.3472837379788 3.1058e-05 deg
M 309.7326551543759 8.7622e-06 deg
tp 2459166.996135491293
(2020-Nov-13.49613549)
2.9342e-05 TDB
period 1192.396554083822
3.26
4.9038e-06
1.343e-08
d
yr
n .3019129825283721 1.2416e-09 deg/d
Q 2.685599127119946 7.3631e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2334  
   data-arc span      24554 days (67.23 yr)  
   first obs. used      1952-11-12  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49153  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:40:23  

Additional Information
 Earth MOID = .710239 au 
 Jupiter MOID = 2.58379 au 
 T_jup = 3.624 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456596.5 (2013-Oct-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2209547909243249 3.7076e-08  
q 1.714252356438588 8.1996e-08 au
tp 2456781.490716628583
(2014-May-03.99071663)
2.5905e-05 TDB
node 79.5943974186355 3.0221e-05 deg
peri 229.1795690420226 3.1042e-05 deg
i 6.85130546375638 3.3527e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2334  
   data-arc span      24554 days (67.23 yr)  
   first obs. used      1952-11-12  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49153  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:40:23  

Additional Information
 Jupiter MOID = 2.58379 au 
 T_jup = 3.624 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.374643123845589E-15 -3.035046483304717E-15 2.213263138864194E-13 -4.542197819516735E-17 2.230733338623066E-14 -6.626236120836502E-16
q -3.035046483304717E-15 6.723339819051876E-15 -4.676762162366265E-13 -1.276901648790715E-16 -4.547115518147602E-14 1.542475953658789E-15
tp 2.213263138864194E-13 -4.676762162366265E-13 6.710606582673791E-10 -7.603660553876417E-12 1.941711874261493E-10 -1.020973054100609E-12
node -4.542197819516735E-17 -1.276901648790715E-16 -7.603660553876417E-12 9.133202082074021E-10 -9.085301753170168E-10 1.485950434421018E-11
peri 2.230733338623066E-14 -4.547115518147602E-14 1.941711874261493E-10 -9.085301753170168E-10 9.635766782207448E-10 -1.503263950046727E-11
i -6.626236120836502E-16 1.542475953658789E-15 -1.020973054100609E-12 1.485950434421018E-11 -1.503263950046727E-11 1.124080040689928E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7   n/a MPO381372  
diameter diameter 4.762 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.3206 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Ditteon, R.; Trent, L. (2018) Minor Planet Bull. 45, 328-329.]
[Radford, D. (2018) Minor Planet Bull. 45, 2.]
geometric albedo albedo 0.340   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

13538 (1991 ST)          Discovered 1991-Sep-30 by McNaught, R. H. at Siding Spring
Reference: 20000222/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 ST = 1952 VD = 1978 SB1 = 1978 TL9 = 1994 LF8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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