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JPL Small-Body Database Browser
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20002 Tillysmith (1991 EM)
Classification: Main-belt Asteroid          SPK-ID: 2020002
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1435151578991521 7.7679e-08  
a 3.187909506811958 3.29e-08 au
q 2.730396170573631 2.4849e-07 au
i 20.24835702643113 6.6838e-06 deg
node 280.376192189462 2.3623e-05 deg
peri 26.43973536295069 3.8061e-05 deg
M 288.1168899892061 3.5248e-05 deg
tp 2459415.627746482480
(2021-Jul-20.12774648)
0.00020697 TDB
period 2079.013953503849
5.69
3.2184e-05
8.811e-08
d
yr
n .1731590109788715 2.6806e-09 deg/d
Q 3.645422843050284 3.7622e-08 au
  Orbit Determination Parameters
   # obs. used (total)      601  
   data-arc span      10642 days (29.14 yr)  
   first obs. used      1991-03-10  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58204  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:08:00  

Additional Information
 Earth MOID = 1.72742 au 
 Jupiter MOID = 1.60022 au 
 T_jup = 3.086 
[ 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 13.5   n/a MPO395194  
diameter diameter 11.700 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.051   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20002 Tillysmith           Discovered 1991 Mar. 10 by R. H. McNaught at Siding Spring.
Tilly Smith (b. 1994), in recognising the signs of a tsunami and alerting beachgoers, saved many lives on the island of Phuket in the 2004 Dec. 26 tsunami disaster.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060809/MPCPages.arcLast Updated: 2007-08-08

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1955-Jun-02 02:03 00:03 Jupiter 1.88660020367396 1.88659676120351 1.88660364615191 5.31269152550738 5.22749996518061 2435260.585368405 3.32739821325614 298.012347540694 111.074189853092 61.259777211018 2541314.32648573 T 10 CATAB v2.0f-lin.ifort 2020-May-20 05:08:13 2020-May-20 05:08
1966-Sep-05 23:34 00:02 Jupiter 1.6551251370877 1.6551238331417 1.65512644104828 5.48265372068585 5.38850415666093 2439374.481808728 2.24327633686194 356.607868539202 46.2222886773346 82.5827634691748 2992541.87204639 T 10 CATAB v2.0f-lin.ifort 2020-May-20 05:08:13 2020-May-20 05:08
1977-Dec-22 09:20 00:02 Jupiter 1.63578707304472 1.63578626180106 1.63578788431024 5.47857741329543 5.38323284273162 2443499.888595216 1.61021830862486 379.333585989861 22.9015458551506 -85.0174778535092 2933345.24769276 T 10 CATAB v2.0f-lin.ifort 2020-May-20 05:08:13 2020-May-20 05:08
1989-Mar-11 00:15 00:01 Jupiter 1.85409232897999 1.85409083636498 1.85409382160639 5.23981583268549 5.15189198885114 2447596.510277242 1.27707382778053 264.750870270133 29.2797263907934 -74.834841075529 2706153.82264001 T 10 CATAB v2.0f-lin.ifort 2020-May-20 05:08:13 2020-May-20 05:08
2121-May-10 12:45 00:04 Jupiter 1.82510204449538 1.82509834471076 1.82510574430779 5.32481630758816 5.23693390795371 2495869.030965808 4.39931453939741 438.644121642648 81.684057089147 67.0715985712416 2770532.57182585 T 10 CATAB v2.0f-lin.ifort 2020-May-20 05:08:13 2020-May-20 05:08
2132-Aug-20 04:32 00:05 Jupiter 1.64057257505085 1.64057106992746 1.64057408026843 5.49832070182666 5.40360405314769 2499988.688918027 4.70944718101191 725.51864466428 37.518145598745 84.8166759417615 3075876.51645568 T 10 CATAB v2.0f-lin.ifort 2020-May-20 05:08:13 2020-May-20 05:08
2143-Dec-03 00:21 00:06 Jupiter 1.67306642739462 1.67306385584258 1.67306899928075 5.5105945581567 5.41794364771983 2504110.514477761 5.76555576542753 1215.6906176754 21.7681611950195 -84.0016870920793 3035186.12499677 T 10 CATAB v2.0f-lin.ifort 2020-May-20 05:08:13 2020-May-20 05:08
2155-Feb-07 12:41 00:08 Jupiter 1.9354305976884 1.93542377496069 1.93543742074034 5.2591771225984 5.17529354872798 2508195.028782111 8.03887876404742 1309.64539580877 30.3861567107603 -74.7034996274339 2943689.77828829 T 10 CATAB v2.0f-lin.ifort 2020-May-20 05:08:13 2020-May-20 05:08

Alternate Designations
 1991 EM = 1998 MP28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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