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JPL Small-Body Database Browser
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20628 (1999 TS40)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020628
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2214755332904156 3.8365e-08  
a 3.989032220507881 3.664e-08 au
q 3.105559182158247 1.5743e-07 au
i 6.546851747043917 5.3681e-06 deg
node 146.6331210216561 4.037e-05 deg
peri 278.5093041693386 4.2175e-05 deg
M 127.2374927357164 1.3449e-05 deg
tp 2457571.980938088727
(2016-Jul-02.48093809)
0.00010458 TDB
period 2910.045257313702
7.97
4.0094e-05
1.098e-07
d
yr
n .1237094162351002 1.7044e-09 deg/d
Q 4.872505258857514 4.4754e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1275  
   data-arc span      10098 days (27.65 yr)  
   first obs. used      1991-09-17  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52831  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:54:04  

Additional Information
 Earth MOID = 2.12815 au 
 Jupiter MOID = .676818 au 
 T_jup = 3.001 
[ 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 12.6   n/a MPO439237  
diameter diameter 17.936 km 0.338 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 68.1 h n/a LCDB (Rev. 2019-January); 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:
[Warner, B.D.; Stephens, R.D. (2018) Minor Planet Bull. 45, 262-265.]
geometric albedo albedo 0.046   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

20628 (1999 TS40)          Discovered 1999-Oct-05 by CSS at Catalina
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TS40 = 1991 SY4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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